./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/LogRecursive.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_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/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_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/LogRecursive.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/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_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/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 e724a514255a950b17f8b31ed081620ead5e2540931c6bb88a6923d310e5f391 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:35:26,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:35:26,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:35:26,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:35:26,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:35:26,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:35:26,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:35:26,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:35:26,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:35:26,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:35:26,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:35:26,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:35:26,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:35:26,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:35:26,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:35:26,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:35:26,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:35:26,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:35:26,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:35:26,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:35:26,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:35:26,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:35:26,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:35:26,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:35:26,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:35:26,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:35:26,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:35:26,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:35:26,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:35:26,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:35:26,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:35:26,468 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:35:26,469 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:35:26,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:35:26,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:35:26,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:35:26,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:35:26,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:35:26,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:35:26,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:35:26,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:35:26,482 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-19 13:35:26,520 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:35:26,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:35:26,524 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:35:26,525 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:35:26,525 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:35:26,525 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:35:26,525 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:35:26,526 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:35:26,526 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:35:26,526 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:35:26,527 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:35:26,528 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:35:26,528 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:35:26,528 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:35:26,528 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:35:26,529 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:35:26,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:35:26,530 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 13:35:26,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:35:26,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:35:26,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:35:26,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:35:26,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:35:26,531 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-19 13:35:26,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:35:26,532 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:35:26,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:35:26,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:35:26,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:35:26,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:35:26,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:35:26,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:35:26,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:35:26,536 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:35:26,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:35:26,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:35:26,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:35:26,537 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:35:26,537 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_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e724a514255a950b17f8b31ed081620ead5e2540931c6bb88a6923d310e5f391 [2021-11-19 13:35:26,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:35:26,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:35:26,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:35:26,814 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:35:26,815 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:35:26,817 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/termination-numeric/LogRecursive.c [2021-11-19 13:35:26,880 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/data/b7e477ca8/b1789e8ff7234dbc9b5767dbc128b05d/FLAG37e92f6b2 [2021-11-19 13:35:27,340 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:35:27,341 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/sv-benchmarks/c/termination-numeric/LogRecursive.c [2021-11-19 13:35:27,346 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/data/b7e477ca8/b1789e8ff7234dbc9b5767dbc128b05d/FLAG37e92f6b2 [2021-11-19 13:35:27,756 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/data/b7e477ca8/b1789e8ff7234dbc9b5767dbc128b05d [2021-11-19 13:35:27,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:35:27,763 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:35:27,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:35:27,765 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:35:27,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:35:27,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:35:27" (1/1) ... [2021-11-19 13:35:27,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@272faa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:27, skipping insertion in model container [2021-11-19 13:35:27,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:35:27" (1/1) ... [2021-11-19 13:35:27,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:35:27,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:35:27,974 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:35:27,980 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:35:28,016 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:35:28,028 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:35:28,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:28 WrapperNode [2021-11-19 13:35:28,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:35:28,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:35:28,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:35:28,032 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:35:28,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:28" (1/1) ... [2021-11-19 13:35:28,046 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:28" (1/1) ... [2021-11-19 13:35:28,068 INFO L137 Inliner]: procedures = 6, calls = 4, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2021-11-19 13:35:28,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:35:28,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:35:28,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:35:28,070 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:35:28,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:28" (1/1) ... [2021-11-19 13:35:28,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:28" (1/1) ... [2021-11-19 13:35:28,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:28" (1/1) ... [2021-11-19 13:35:28,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:28" (1/1) ... [2021-11-19 13:35:28,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:28" (1/1) ... [2021-11-19 13:35:28,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:28" (1/1) ... [2021-11-19 13:35:28,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:28" (1/1) ... [2021-11-19 13:35:28,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:35:28,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:35:28,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:35:28,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:35:28,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:28" (1/1) ... [2021-11-19 13:35:28,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:35:28,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:35:28,146 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:35:28,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:35:28,195 INFO L130 BoogieDeclarations]: Found specification of procedure _log [2021-11-19 13:35:28,196 INFO L138 BoogieDeclarations]: Found implementation of procedure _log [2021-11-19 13:35:28,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:35:28,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:35:28,253 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:35:28,255 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:35:28,377 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:35:28,388 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:35:28,389 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 13:35:28,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:35:28 BoogieIcfgContainer [2021-11-19 13:35:28,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:35:28,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:35:28,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:35:28,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:35:28,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:35:27" (1/3) ... [2021-11-19 13:35:28,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf6c774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:35:28, skipping insertion in model container [2021-11-19 13:35:28,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:28" (2/3) ... [2021-11-19 13:35:28,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf6c774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:35:28, skipping insertion in model container [2021-11-19 13:35:28,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:35:28" (3/3) ... [2021-11-19 13:35:28,400 INFO L111 eAbstractionObserver]: Analyzing ICFG LogRecursive.c [2021-11-19 13:35:28,406 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:35:28,406 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-19 13:35:28,455 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:35:28,463 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 13:35:28,463 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-19 13:35:28,513 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 17 states have internal predecessors, (20), 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 13:35:28,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-19 13:35:28,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:28,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:28,518 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting _logErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [_logErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-19 13:35:28,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:28,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1793613479, now seen corresponding path program 1 times [2021-11-19 13:35:28,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:35:28,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552473872] [2021-11-19 13:35:28,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:28,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:35:28,623 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 13:35:28,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749607427] [2021-11-19 13:35:28,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:28,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:35:28,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:35:28,661 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:35:28,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 13:35:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:28,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:35:28,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:28,878 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 13:35:28,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:29,659 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 13:35:29,660 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:35:29,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552473872] [2021-11-19 13:35:29,661 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:35:29,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749607427] [2021-11-19 13:35:29,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749607427] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:29,665 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:29,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-11-19 13:35:29,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842839938] [2021-11-19 13:35:29,669 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:29,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:35:29,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:35:29,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:35:29,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:35:29,714 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 17 states have internal predecessors, (20), 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 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:35:29,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:29,909 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-19 13:35:29,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:35:29,913 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-19 13:35:29,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:29,934 INFO L225 Difference]: With dead ends: 39 [2021-11-19 13:35:29,934 INFO L226 Difference]: Without dead ends: 30 [2021-11-19 13:35:29,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:35:29,950 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:29,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 97 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2021-11-19 13:35:29,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-19 13:35:29,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-11-19 13:35:29,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 21 states have internal predecessors, (24), 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 13:35:30,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-11-19 13:35:30,003 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 7 [2021-11-19 13:35:30,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:30,003 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-11-19 13:35:30,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:35:30,005 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-11-19 13:35:30,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 13:35:30,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:30,006 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:30,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:30,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-19 13:35:30,221 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting _logErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [_logErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-19 13:35:30,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:30,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1396530210, now seen corresponding path program 1 times [2021-11-19 13:35:30,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:35:30,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138254763] [2021-11-19 13:35:30,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:30,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:35:30,233 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 13:35:30,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595361390] [2021-11-19 13:35:30,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:30,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:35:30,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:35:30,235 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:35:30,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 13:35:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:30,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:35:30,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:32,540 WARN L860 $PredicateComparison]: unable to prove that (exists ((v__log_~y_BEFORE_CALL_1 Int) (v__log_~x_BEFORE_CALL_1 Int)) (let ((.cse0 (div v__log_~x_BEFORE_CALL_1 v__log_~y_BEFORE_CALL_1))) (and (<= .cse0 2147483647) (< 1 v__log_~y_BEFORE_CALL_1) (<= |c__log_#in~x| .cse0) (<= v__log_~y_BEFORE_CALL_1 v__log_~x_BEFORE_CALL_1)))) is different from true [2021-11-19 13:35:34,586 WARN L860 $PredicateComparison]: unable to prove that (exists ((v__log_~y_BEFORE_CALL_1 Int) (v__log_~x_BEFORE_CALL_1 Int)) (let ((.cse0 (div v__log_~x_BEFORE_CALL_1 v__log_~y_BEFORE_CALL_1))) (and (<= .cse0 2147483647) (< 1 v__log_~y_BEFORE_CALL_1) (<= c__log_~x .cse0) (<= v__log_~y_BEFORE_CALL_1 v__log_~x_BEFORE_CALL_1)))) is different from true [2021-11-19 13:35:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:35:39,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:35:41,971 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:35:41,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138254763] [2021-11-19 13:35:41,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:35:41,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595361390] [2021-11-19 13:35:41,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595361390] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:41,972 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:41,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-11-19 13:35:41,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205712284] [2021-11-19 13:35:41,973 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:41,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:35:41,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:35:41,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:35:41,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=49, Unknown=3, NotChecked=30, Total=110 [2021-11-19 13:35:41,975 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:35:54,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:54,175 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-11-19 13:35:54,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:35:54,177 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 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 13:35:54,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:54,178 INFO L225 Difference]: With dead ends: 28 [2021-11-19 13:35:54,179 INFO L226 Difference]: Without dead ends: 26 [2021-11-19 13:35:54,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=45, Invalid=91, Unknown=4, NotChecked=42, Total=182 [2021-11-19 13:35:54,182 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:54,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 60 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 64 Unchecked, 0.0s Time] [2021-11-19 13:35:54,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-19 13:35:54,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-11-19 13:35:54,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 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 13:35:54,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-19 13:35:54,191 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 12 [2021-11-19 13:35:54,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:54,192 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-19 13:35:54,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:35:54,193 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-19 13:35:54,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-19 13:35:54,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:54,194 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:54,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:54,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:35:54,398 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [_logErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-19 13:35:54,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:54,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1327230598, now seen corresponding path program 1 times [2021-11-19 13:35:54,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:35:54,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365333198] [2021-11-19 13:35:54,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:54,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:35:54,406 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 13:35:54,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953883868] [2021-11-19 13:35:54,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:54,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:35:54,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:35:54,408 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:35:54,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 13:35:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:54,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:35:54,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:54,481 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 13:35:54,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:54,533 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 13:35:54,533 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:35:54,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365333198] [2021-11-19 13:35:54,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:35:54,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953883868] [2021-11-19 13:35:54,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953883868] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:54,535 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:54,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-19 13:35:54,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777145915] [2021-11-19 13:35:54,535 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:54,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:35:54,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:35:54,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:35:54,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:35:54,537 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 13:35:54,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:54,565 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-11-19 13:35:54,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:35:54,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2021-11-19 13:35:54,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:54,567 INFO L225 Difference]: With dead ends: 39 [2021-11-19 13:35:54,568 INFO L226 Difference]: Without dead ends: 38 [2021-11-19 13:35:54,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:35:54,570 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:54,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 45 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:35:54,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-19 13:35:54,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-11-19 13:35:54,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 13:35:54,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-11-19 13:35:54,579 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 15 [2021-11-19 13:35:54,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:54,580 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-11-19 13:35:54,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 13:35:54,581 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-11-19 13:35:54,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-19 13:35:54,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:54,582 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:54,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:54,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:35:54,809 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting _logErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [_logErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-19 13:35:54,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:54,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1805524379, now seen corresponding path program 1 times [2021-11-19 13:35:54,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:35:54,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062674266] [2021-11-19 13:35:54,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:54,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:35:54,818 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 13:35:54,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833422188] [2021-11-19 13:35:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:54,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:35:54,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:35:54,819 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:35:54,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 13:35:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:54,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:35:54,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:54,877 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 13:35:54,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:54,916 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 13:35:54,916 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:35:54,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062674266] [2021-11-19 13:35:54,917 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:35:54,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833422188] [2021-11-19 13:35:54,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833422188] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:54,917 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:54,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-19 13:35:54,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358379986] [2021-11-19 13:35:54,918 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:54,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:35:54,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:35:54,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:35:54,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:35:54,920 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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 13:35:54,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:54,931 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-11-19 13:35:54,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:35:54,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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 16 [2021-11-19 13:35:54,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:54,933 INFO L225 Difference]: With dead ends: 35 [2021-11-19 13:35:54,933 INFO L226 Difference]: Without dead ends: 31 [2021-11-19 13:35:54,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:35:54,935 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:54,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:35:54,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-19 13:35:54,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-19 13:35:54,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 13:35:54,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-11-19 13:35:54,943 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 16 [2021-11-19 13:35:54,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:54,944 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-11-19 13:35:54,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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 13:35:54,944 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-11-19 13:35:54,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 13:35:54,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:54,946 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:54,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:55,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:35:55,172 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [_logErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-19 13:35:55,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:55,173 INFO L85 PathProgramCache]: Analyzing trace with hash -78458362, now seen corresponding path program 1 times [2021-11-19 13:35:55,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:35:55,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130037962] [2021-11-19 13:35:55,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:55,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:35:55,181 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 13:35:55,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060083533] [2021-11-19 13:35:55,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:55,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:35:55,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:35:55,183 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:35:55,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 13:35:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:55,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:35:55,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:35:55,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:35:55,607 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:35:55,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130037962] [2021-11-19 13:35:55,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:35:55,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060083533] [2021-11-19 13:35:55,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060083533] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:35:55,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1667942099] [2021-11-19 13:35:55,628 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-19 13:35:55,629 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 13:35:55,633 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 13:35:55,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:35:55,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-19 13:35:55,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862899523] [2021-11-19 13:35:55,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 13:35:55,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 13:35:55,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:35:55,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 13:35:55,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:35:55,637 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-19 13:35:55,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:55,691 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2021-11-19 13:35:55,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 13:35:55,692 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) Word has length 35 [2021-11-19 13:35:55,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:55,693 INFO L225 Difference]: With dead ends: 60 [2021-11-19 13:35:55,693 INFO L226 Difference]: Without dead ends: 51 [2021-11-19 13:35:55,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:35:55,695 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:55,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 69 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:35:55,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-19 13:35:55,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-19 13:35:55,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 8 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 13:35:55,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-11-19 13:35:55,706 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 35 [2021-11-19 13:35:55,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:55,706 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-11-19 13:35:55,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-19 13:35:55,707 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-11-19 13:35:55,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 13:35:55,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:55,710 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:55,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-19 13:35:55,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:35:55,917 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [_logErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-19 13:35:55,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:55,917 INFO L85 PathProgramCache]: Analyzing trace with hash 707076966, now seen corresponding path program 2 times [2021-11-19 13:35:55,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:35:55,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882339703] [2021-11-19 13:35:55,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:55,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:35:55,927 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 13:35:55,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020500166] [2021-11-19 13:35:55,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 13:35:55,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:35:55,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:35:55,929 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:35:55,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 13:35:55,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-19 13:35:55,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:35:55,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 13:35:55,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-19 13:35:56,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-19 13:35:57,905 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:35:57,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882339703] [2021-11-19 13:35:57,905 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:35:57,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020500166] [2021-11-19 13:35:57,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020500166] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:35:57,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1657767399] [2021-11-19 13:35:57,908 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-19 13:35:57,909 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 13:35:57,909 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 13:35:57,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:35:57,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2021-11-19 13:35:57,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982675335] [2021-11-19 13:35:57,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 13:35:57,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-19 13:35:57,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:35:57,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-19 13:35:57,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2021-11-19 13:35:57,912 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 30 states have internal predecessors, (63), 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 13:35:58,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:58,050 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2021-11-19 13:35:58,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 13:35:58,051 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 30 states have internal predecessors, (63), 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 85 [2021-11-19 13:35:58,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:58,054 INFO L225 Difference]: With dead ends: 108 [2021-11-19 13:35:58,054 INFO L226 Difference]: Without dead ends: 91 [2021-11-19 13:35:58,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2021-11-19 13:35:58,056 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:58,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 77 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:35:58,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-19 13:35:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-11-19 13:35:58,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 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 13:35:58,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2021-11-19 13:35:58,093 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 85 [2021-11-19 13:35:58,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:58,102 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2021-11-19 13:35:58,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 30 states have internal predecessors, (63), 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 13:35:58,103 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2021-11-19 13:35:58,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-19 13:35:58,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:58,113 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:58,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:58,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-19 13:35:58,328 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [_logErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-19 13:35:58,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:58,329 INFO L85 PathProgramCache]: Analyzing trace with hash 2050052454, now seen corresponding path program 3 times [2021-11-19 13:35:58,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:35:58,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866291122] [2021-11-19 13:35:58,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:58,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:35:58,341 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 13:35:58,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295202116] [2021-11-19 13:35:58,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 13:35:58,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:35:58,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:35:58,342 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:35:58,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 13:35:58,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 13:35:58,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:35:58,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-19 13:35:58,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 511 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2021-11-19 13:35:59,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 511 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2021-11-19 13:36:11,613 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:36:11,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866291122] [2021-11-19 13:36:11,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:36:11,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295202116] [2021-11-19 13:36:11,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295202116] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:11,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1093672289] [2021-11-19 13:36:11,617 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-19 13:36:11,617 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 13:36:11,618 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 13:36:11,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:36:11,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 61 [2021-11-19 13:36:11,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329392017] [2021-11-19 13:36:11,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 13:36:11,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-19 13:36:11,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:36:11,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-19 13:36:11,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2021-11-19 13:36:11,626 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 62 states, 61 states have (on average 2.081967213114754) internal successors, (127), 62 states have internal predecessors, (127), 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 13:36:11,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:11,961 INFO L93 Difference]: Finished difference Result 204 states and 237 transitions. [2021-11-19 13:36:11,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-19 13:36:11,961 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.081967213114754) internal successors, (127), 62 states have internal predecessors, (127), 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 165 [2021-11-19 13:36:11,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:11,965 INFO L225 Difference]: With dead ends: 204 [2021-11-19 13:36:11,965 INFO L226 Difference]: Without dead ends: 171 [2021-11-19 13:36:11,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2021-11-19 13:36:11,970 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:11,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 113 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:36:11,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-19 13:36:11,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-11-19 13:36:11,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 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 13:36:11,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2021-11-19 13:36:11,998 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 165 [2021-11-19 13:36:11,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:11,999 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2021-11-19 13:36:11,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.081967213114754) internal successors, (127), 62 states have internal predecessors, (127), 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 13:36:11,999 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2021-11-19 13:36:12,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-11-19 13:36:12,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:12,008 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 31, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:12,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:12,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-19 13:36:12,228 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [_logErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-19 13:36:12,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:12,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1038789990, now seen corresponding path program 4 times [2021-11-19 13:36:12,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:36:12,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133260956] [2021-11-19 13:36:12,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:12,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:36:12,262 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 13:36:12,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076413286] [2021-11-19 13:36:12,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 13:36:12,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:36:12,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:36:12,284 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:36:12,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 13:36:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:12,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-19 13:36:12,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5001 backedges. 0 proven. 2295 refuted. 0 times theorem prover too weak. 2706 trivial. 0 not checked. [2021-11-19 13:36:14,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5001 backedges. 0 proven. 2295 refuted. 0 times theorem prover too weak. 2706 trivial. 0 not checked. [2021-11-19 13:39:37,850 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:39:37,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133260956] [2021-11-19 13:39:37,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:39:37,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076413286] [2021-11-19 13:39:37,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076413286] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:39:37,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [51165660] [2021-11-19 13:39:37,855 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-19 13:39:37,855 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 13:39:37,856 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 13:39:37,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:39:37,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 125 [2021-11-19 13:39:37,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306704953] [2021-11-19 13:39:37,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 13:39:37,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-11-19 13:39:37,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:39:37,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-11-19 13:39:37,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4031, Invalid=11719, Unknown=0, NotChecked=0, Total=15750 [2021-11-19 13:39:37,866 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand has 126 states, 125 states have (on average 2.04) internal successors, (255), 126 states have internal predecessors, (255), 1 states have call successors, (2), 1 states have call predecessors, (2), 62 states have return successors, (62), 62 states have call predecessors, (62), 1 states have call successors, (62) [2021-11-19 13:39:39,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:39:39,006 INFO L93 Difference]: Finished difference Result 396 states and 461 transitions. [2021-11-19 13:39:39,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-11-19 13:39:39,007 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 2.04) internal successors, (255), 126 states have internal predecessors, (255), 1 states have call successors, (2), 1 states have call predecessors, (2), 62 states have return successors, (62), 62 states have call predecessors, (62), 1 states have call successors, (62) Word has length 325 [2021-11-19 13:39:39,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:39:39,013 INFO L225 Difference]: With dead ends: 396 [2021-11-19 13:39:39,013 INFO L226 Difference]: Without dead ends: 331 [2021-11-19 13:39:39,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4621 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4031, Invalid=11719, Unknown=0, NotChecked=0, Total=15750 [2021-11-19 13:39:39,025 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:39:39,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 185 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 13:39:39,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-11-19 13:39:39,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2021-11-19 13:39:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 264 states have (on average 1.0075757575757576) internal successors, (266), 264 states have internal predecessors, (266), 3 states have call successors, (3), 2 states have call predecessors, (3), 63 states have return successors, (64), 64 states have call predecessors, (64), 2 states have call successors, (64) [2021-11-19 13:39:39,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 333 transitions. [2021-11-19 13:39:39,074 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 333 transitions. Word has length 325 [2021-11-19 13:39:39,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:39:39,075 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 333 transitions. [2021-11-19 13:39:39,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 2.04) internal successors, (255), 126 states have internal predecessors, (255), 1 states have call successors, (2), 1 states have call predecessors, (2), 62 states have return successors, (62), 62 states have call predecessors, (62), 1 states have call successors, (62) [2021-11-19 13:39:39,076 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 333 transitions. [2021-11-19 13:39:39,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 636 [2021-11-19 13:39:39,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:39:39,098 INFO L514 BasicCegarLoop]: trace histogram [64, 63, 63, 63, 63, 63, 63, 63, 62, 62, 1, 1, 1, 1, 1, 1] [2021-11-19 13:39:39,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:39:39,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:39:39,313 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [_logErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-19 13:39:39,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:39:39,314 INFO L85 PathProgramCache]: Analyzing trace with hash 790440710, now seen corresponding path program 5 times [2021-11-19 13:39:39,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:39:39,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513784147] [2021-11-19 13:39:39,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:39,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:39:39,387 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 13:39:39,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136440813] [2021-11-19 13:39:39,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 13:39:39,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:39:39,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:39:39,392 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:39:39,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 13:40:05,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2021-11-19 13:40:05,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:40:05,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 227 conjunts are in the unsatisfiable core [2021-11-19 13:40:05,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:40:54,006 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-19 13:40:54,006 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:40:54,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513784147] [2021-11-19 13:40:54,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:40:54,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136440813] [2021-11-19 13:40:54,007 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-19 13:40:54,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1925157515] [2021-11-19 13:40:54,009 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-19 13:40:54,009 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 13:40:54,010 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 13:40:54,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-19 13:40:54,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:40:54,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-19 13:40:54,011 ERROR L172 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-11-19 13:40:54,012 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-19 13:40:54,026 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 4 remaining) [2021-11-19 13:40:54,029 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location _logErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 4 remaining) [2021-11-19 13:40:54,029 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location _logErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 4 remaining) [2021-11-19 13:40:54,030 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location _logErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 4 remaining) [2021-11-19 13:40:54,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:40:54,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:40:54,239 INFO L732 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1, 1] [2021-11-19 13:40:54,242 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 13:40:54,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 01:40:54 BoogieIcfgContainer [2021-11-19 13:40:54,315 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 13:40:54,316 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 13:40:54,316 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 13:40:54,316 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 13:40:54,317 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:35:28" (3/4) ... [2021-11-19 13:40:54,320 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-19 13:40:54,320 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 13:40:54,321 INFO L158 Benchmark]: Toolchain (without parser) took 326557.98ms. Allocated memory was 104.9MB in the beginning and 159.4MB in the end (delta: 54.5MB). Free memory was 72.3MB in the beginning and 66.9MB in the end (delta: 5.4MB). Peak memory consumption was 60.5MB. Max. memory is 16.1GB. [2021-11-19 13:40:54,321 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 104.9MB. Free memory was 58.2MB in the beginning and 58.1MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:40:54,321 INFO L158 Benchmark]: CACSL2BoogieTranslator took 264.68ms. Allocated memory is still 104.9MB. Free memory was 72.0MB in the beginning and 80.4MB in the end (delta: -8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 13:40:54,322 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.43ms. Allocated memory is still 104.9MB. Free memory was 80.4MB in the beginning and 79.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:40:54,322 INFO L158 Benchmark]: Boogie Preprocessor took 34.44ms. Allocated memory is still 104.9MB. Free memory was 79.2MB in the beginning and 78.3MB in the end (delta: 952.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 13:40:54,323 INFO L158 Benchmark]: RCFGBuilder took 286.83ms. Allocated memory is still 104.9MB. Free memory was 78.3MB in the beginning and 69.1MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 13:40:54,323 INFO L158 Benchmark]: TraceAbstraction took 325922.20ms. Allocated memory was 104.9MB in the beginning and 159.4MB in the end (delta: 54.5MB). Free memory was 68.7MB in the beginning and 67.9MB in the end (delta: 782.2kB). Peak memory consumption was 57.2MB. Max. memory is 16.1GB. [2021-11-19 13:40:54,324 INFO L158 Benchmark]: Witness Printer took 4.19ms. Allocated memory is still 159.4MB. Free memory was 67.9MB in the beginning and 66.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 13:40:54,327 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 104.9MB. Free memory was 58.2MB in the beginning and 58.1MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 264.68ms. Allocated memory is still 104.9MB. Free memory was 72.0MB in the beginning and 80.4MB in the end (delta: -8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.43ms. Allocated memory is still 104.9MB. Free memory was 80.4MB in the beginning and 79.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 34.44ms. Allocated memory is still 104.9MB. Free memory was 79.2MB in the beginning and 78.3MB in the end (delta: 952.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 286.83ms. Allocated memory is still 104.9MB. Free memory was 78.3MB in the beginning and 69.1MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 325922.20ms. Allocated memory was 104.9MB in the beginning and 159.4MB in the end (delta: 54.5MB). Free memory was 68.7MB in the beginning and 67.9MB in the end (delta: 782.2kB). Peak memory consumption was 57.2MB. Max. memory is 16.1GB. * Witness Printer took 4.19ms. Allocated memory is still 159.4MB. Free memory was 67.9MB in the beginning and 66.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 41]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L20] int x = __VERIFIER_nondet_int(); [L21] COND FALSE !(x < 0) [L23] int y = __VERIFIER_nondet_int(); [L24] COND FALSE !(y < 0) [L26] int z = __VERIFIER_nondet_int(); [L27] CALL _log(x,y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND TRUE x >= y && y > 1 [L41] EXPR x/y [L41] CALL, EXPR _log(x/y, y) [L40] COND FALSE !(x >= y && y > 1) [L43] return 0; [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] EXPR 1 + _log(x/y, y) [L41] return 1 + _log(x/y, y); [L41] RET, EXPR _log(x/y, y) [L41] 1 + _log(x/y, y) - UnprovableResult [Line: 41]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 41]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 41]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 325.8s, OverallIterations: 9, TraceHistogramMax: 64, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.1s, AutomataDifference: 14.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 229 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 226 mSDsluCounter, 680 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 95 IncrementalHoareTripleChecker+Unchecked, 620 mSDsCounter, 85 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 625 IncrementalHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 85 mSolverCounterUnsat, 105 mSDtfsCounter, 625 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1309 GetRequests, 1057 SyntacticMatches, 0 SemanticMatches, 252 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 5920 ImplicationChecksByTransitivity, 26.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=331occurred in iteration=8, InterpolantAutomatonStates: 256, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 25.2s SatisfiabilityAnalysisTime, 281.8s InterpolantComputationTime, 1295 NumberOfCodeBlocks, 1055 NumberOfCodeBlocksAsserted, 56 NumberOfCheckSat, 1304 ConstructedInterpolants, 12 QuantifiedInterpolants, 2806 SizeOfPredicates, 4 NumberOfNonLiveVariables, 2542 ConjunctsInSsa, 362 ConjunctsInUnsatCore, 16 InterpolantComputations, 8 PerfectInterpolantSequences, 7292/13128 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis No suitable file found in config dir /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbec579-ae1a-47a3-a8ed-495eb3edfa42/bin/utaipan-UbGMyvGFUs/config using search string *Overflow*64bit*_Bitvector*.epf No suitable settings file found using Overflow*64bit*_Bitvector ERROR: UNSUPPORTED PROPERTY Writing output log to file Ultimate.log Result: UNKNOWN