./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig9a.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig9a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 172ac4fa0310d14c59d9149bc1b8ec1548860e0b827250d611bfd9d710019753 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:30:51,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:30:51,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:30:51,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:30:51,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:30:51,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:30:51,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:30:51,338 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:30:51,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:30:51,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:30:51,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:30:51,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:30:51,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:30:51,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:30:51,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:30:51,359 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:30:51,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:30:51,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:30:51,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:30:51,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:30:51,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:30:51,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:30:51,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:30:51,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:30:51,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:30:51,394 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:30:51,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:30:51,397 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:30:51,397 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:30:51,399 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:30:51,400 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:30:51,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:30:51,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:30:51,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:30:51,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:30:51,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:30:51,407 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:30:51,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:30:51,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:30:51,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:30:51,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:30:51,411 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-21 00:30:51,463 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:30:51,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:30:51,464 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:30:51,464 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:30:51,465 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:30:51,466 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:30:51,466 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:30:51,466 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:30:51,466 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:30:51,467 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:30:51,468 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:30:51,468 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:30:51,468 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:30:51,469 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:30:51,469 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:30:51,469 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:30:51,470 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:30:51,470 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:30:51,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:30:51,471 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 00:30:51,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:30:51,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:30:51,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:30:51,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:30:51,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:30:51,473 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-21 00:30:51,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:30:51,475 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:30:51,475 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:30:51,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:30:51,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:30:51,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:30:51,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:30:51,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:30:51,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:30:51,477 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:30:51,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:30:51,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:30:51,478 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:30:51,478 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:30:51,478 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_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 172ac4fa0310d14c59d9149bc1b8ec1548860e0b827250d611bfd9d710019753 [2021-11-21 00:30:51,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:30:51,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:30:51,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:30:51,748 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:30:51,749 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:30:51,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig9a.c [2021-11-21 00:30:51,811 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/data/88ee0d0f9/943f403266b240bab7877b80f34a9bf1/FLAG857b49076 [2021-11-21 00:30:52,242 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:30:52,242 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig9a.c [2021-11-21 00:30:52,249 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/data/88ee0d0f9/943f403266b240bab7877b80f34a9bf1/FLAG857b49076 [2021-11-21 00:30:52,639 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/data/88ee0d0f9/943f403266b240bab7877b80f34a9bf1 [2021-11-21 00:30:52,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:30:52,643 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:30:52,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:30:52,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:30:52,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:30:52,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:30:52" (1/1) ... [2021-11-21 00:30:52,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ec863f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:52, skipping insertion in model container [2021-11-21 00:30:52,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:30:52" (1/1) ... [2021-11-21 00:30:52,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:30:52,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:30:52,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:30:52,834 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:30:52,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:30:52,859 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:30:52,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:52 WrapperNode [2021-11-21 00:30:52,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:30:52,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:30:52,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:30:52,861 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:30:52,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:52" (1/1) ... [2021-11-21 00:30:52,871 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:52" (1/1) ... [2021-11-21 00:30:52,887 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2021-11-21 00:30:52,887 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:30:52,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:30:52,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:30:52,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:30:52,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:52" (1/1) ... [2021-11-21 00:30:52,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:52" (1/1) ... [2021-11-21 00:30:52,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:52" (1/1) ... [2021-11-21 00:30:52,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:52" (1/1) ... [2021-11-21 00:30:52,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:52" (1/1) ... [2021-11-21 00:30:52,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:52" (1/1) ... [2021-11-21 00:30:52,905 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:52" (1/1) ... [2021-11-21 00:30:52,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:30:52,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:30:52,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:30:52,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:30:52,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:52" (1/1) ... [2021-11-21 00:30:52,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:30:52,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:30:52,959 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:30:52,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:30:52,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:30:52,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:30:53,057 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:30:53,059 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:30:53,156 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:30:53,177 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:30:53,177 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 00:30:53,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:30:53 BoogieIcfgContainer [2021-11-21 00:30:53,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:30:53,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:30:53,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:30:53,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:30:53,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:30:52" (1/3) ... [2021-11-21 00:30:53,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2243fa9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:30:53, skipping insertion in model container [2021-11-21 00:30:53,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:52" (2/3) ... [2021-11-21 00:30:53,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2243fa9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:30:53, skipping insertion in model container [2021-11-21 00:30:53,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:30:53" (3/3) ... [2021-11-21 00:30:53,188 INFO L111 eAbstractionObserver]: Analyzing ICFG BrockschmidtCookFuhs-CAV2013-Fig9a.c [2021-11-21 00:30:53,193 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:30:53,193 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-21 00:30:53,236 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:30:53,244 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 [2021-11-21 00:30:53,245 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-21 00:30:53,259 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:30:53,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 00:30:53,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:30:53,265 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 00:30:53,266 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:30:53,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:30:53,272 INFO L85 PathProgramCache]: Analyzing trace with hash 71275045, now seen corresponding path program 1 times [2021-11-21 00:30:53,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:30:53,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647410539] [2021-11-21 00:30:53,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:30:53,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:30:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:30:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:30:53,429 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:30:53,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647410539] [2021-11-21 00:30:53,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647410539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:30:53,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:30:53,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:30:53,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95392739] [2021-11-21 00:30:53,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:30:53,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:30:53,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:30:53,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:30:53,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:30:53,469 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:30:53,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:30:53,579 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-11-21 00:30:53,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:30:53,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-21 00:30:53,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:30:53,590 INFO L225 Difference]: With dead ends: 28 [2021-11-21 00:30:53,597 INFO L226 Difference]: Without dead ends: 12 [2021-11-21 00:30:53,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:30:53,605 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:30:53,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 4 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:30:53,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-21 00:30:53,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-21 00:30:53,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:30:53,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-21 00:30:53,664 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 5 [2021-11-21 00:30:53,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:30:53,665 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-21 00:30:53,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:30:53,665 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-21 00:30:53,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 00:30:53,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:30:53,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 00:30:53,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:30:53,668 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:30:53,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:30:53,672 INFO L85 PathProgramCache]: Analyzing trace with hash 71274263, now seen corresponding path program 1 times [2021-11-21 00:30:53,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:30:53,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301973039] [2021-11-21 00:30:53,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:30:53,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:30:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:30:53,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:30:53,764 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:30:53,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301973039] [2021-11-21 00:30:53,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301973039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:30:53,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:30:53,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:30:53,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511956546] [2021-11-21 00:30:53,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:30:53,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:30:53,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:30:53,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:30:53,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:30:53,769 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:30:53,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:30:53,807 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-11-21 00:30:53,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:30:53,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-21 00:30:53,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:30:53,809 INFO L225 Difference]: With dead ends: 14 [2021-11-21 00:30:53,809 INFO L226 Difference]: Without dead ends: 13 [2021-11-21 00:30:53,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:30:53,812 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:30:53,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 7 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:30:53,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-21 00:30:53,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-21 00:30:53,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 10 states have (on average 1.4) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:30:53,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-21 00:30:53,817 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 5 [2021-11-21 00:30:53,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:30:53,818 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-21 00:30:53,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:30:53,818 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-21 00:30:53,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:30:53,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:30:53,819 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:30:53,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:30:53,820 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:30:53,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:30:53,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2085465086, now seen corresponding path program 1 times [2021-11-21 00:30:53,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:30:53,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649269650] [2021-11-21 00:30:53,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:30:53,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:30:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:30:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:30:53,854 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:30:53,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649269650] [2021-11-21 00:30:53,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649269650] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:30:53,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:30:53,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:30:53,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283223964] [2021-11-21 00:30:53,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:30:53,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:30:53,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:30:53,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:30:53,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:30:53,857 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:30:53,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:30:53,891 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-11-21 00:30:53,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:30:53,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 00:30:53,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:30:53,894 INFO L225 Difference]: With dead ends: 14 [2021-11-21 00:30:53,894 INFO L226 Difference]: Without dead ends: 13 [2021-11-21 00:30:53,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:30:53,898 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:30:53,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:30:53,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-21 00:30:53,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-11-21 00:30:53,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:30:53,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-21 00:30:53,911 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 6 [2021-11-21 00:30:53,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:30:53,912 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-21 00:30:53,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:30:53,913 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-21 00:30:53,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:30:53,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:30:53,914 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:30:53,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:30:53,915 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:30:53,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:30:53,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1617782066, now seen corresponding path program 1 times [2021-11-21 00:30:53,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:30:53,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115835859] [2021-11-21 00:30:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:30:53,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:30:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:30:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:30:53,986 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:30:53,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115835859] [2021-11-21 00:30:53,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115835859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:30:53,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:30:53,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:30:53,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308795969] [2021-11-21 00:30:53,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:30:53,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:30:53,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:30:53,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:30:53,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:30:53,990 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:30:54,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:30:54,033 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-11-21 00:30:54,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:30:54,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 00:30:54,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:30:54,034 INFO L225 Difference]: With dead ends: 22 [2021-11-21 00:30:54,035 INFO L226 Difference]: Without dead ends: 21 [2021-11-21 00:30:54,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:30:54,037 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:30:54,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:30:54,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-21 00:30:54,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-11-21 00:30:54,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:30:54,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-21 00:30:54,052 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 8 [2021-11-21 00:30:54,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:30:54,052 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-21 00:30:54,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:30:54,053 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-21 00:30:54,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:30:54,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:30:54,054 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-11-21 00:30:54,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:30:54,054 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:30:54,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:30:54,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1617781284, now seen corresponding path program 1 times [2021-11-21 00:30:54,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:30:54,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892108893] [2021-11-21 00:30:54,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:30:54,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:30:54,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:30:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:30:54,156 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:30:54,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892108893] [2021-11-21 00:30:54,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892108893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:30:54,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093142096] [2021-11-21 00:30:54,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:30:54,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:30:54,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:30:54,165 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:30:54,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:30:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:30:54,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:30:54,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:30:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:30:54,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:30:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:30:54,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093142096] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:30:54,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [789358274] [2021-11-21 00:30:54,550 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:30:54,550 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:30:54,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:30:54,568 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:30:54,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:30:54,851 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:30:55,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [789358274] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:30:55,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:30:55,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 5] total 12 [2021-11-21 00:30:55,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954433910] [2021-11-21 00:30:55,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:30:55,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:30:55,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:30:55,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:30:55,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:30:55,031 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:30:55,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:30:55,092 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-11-21 00:30:55,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:30:55,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 00:30:55,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:30:55,094 INFO L225 Difference]: With dead ends: 25 [2021-11-21 00:30:55,094 INFO L226 Difference]: Without dead ends: 24 [2021-11-21 00:30:55,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:30:55,096 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:30:55,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 2 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:30:55,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-21 00:30:55,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2021-11-21 00:30:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:30:55,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-11-21 00:30:55,101 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 8 [2021-11-21 00:30:55,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:30:55,102 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-11-21 00:30:55,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:30:55,102 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-11-21 00:30:55,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 00:30:55,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:30:55,103 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-21 00:30:55,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 00:30:55,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:30:55,316 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:30:55,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:30:55,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1665828841, now seen corresponding path program 1 times [2021-11-21 00:30:55,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:30:55,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582916201] [2021-11-21 00:30:55,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:30:55,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:30:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:30:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:30:55,351 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:30:55,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582916201] [2021-11-21 00:30:55,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582916201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:30:55,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210419288] [2021-11-21 00:30:55,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:30:55,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:30:55,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:30:55,353 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:30:55,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:30:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:30:55,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:30:55,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:30:55,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:30:55,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:30:55,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:30:55,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210419288] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:30:55,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [101849306] [2021-11-21 00:30:55,515 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:30:55,515 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:30:55,516 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:30:55,516 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:30:55,516 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:30:57,158 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:30:57,468 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:30:57,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:30:57,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-21 00:30:57,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230315054] [2021-11-21 00:30:57,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:30:57,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:30:57,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:30:57,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:30:57,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:30:57,470 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:30:57,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:30:57,515 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-11-21 00:30:57,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:30:57,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-21 00:30:57,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:30:57,517 INFO L225 Difference]: With dead ends: 46 [2021-11-21 00:30:57,517 INFO L226 Difference]: Without dead ends: 45 [2021-11-21 00:30:57,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:30:57,518 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:30:57,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 17 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:30:57,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-21 00:30:57,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-11-21 00:30:57,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:30:57,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-11-21 00:30:57,529 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 15 [2021-11-21 00:30:57,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:30:57,529 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-11-21 00:30:57,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:30:57,530 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-11-21 00:30:57,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 00:30:57,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:30:57,531 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 00:30:57,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:30:57,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:30:57,746 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:30:57,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:30:57,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1665828059, now seen corresponding path program 1 times [2021-11-21 00:30:57,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:30:57,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918274106] [2021-11-21 00:30:57,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:30:57,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:30:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:30:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:30:57,832 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:30:57,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918274106] [2021-11-21 00:30:57,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918274106] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:30:57,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638529757] [2021-11-21 00:30:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:30:57,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:30:57,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:30:57,851 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:30:57,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:30:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:30:57,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:30:57,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:30:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:30:57,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:30:58,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:30:58,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638529757] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:30:58,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [218473570] [2021-11-21 00:30:58,050 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:30:58,051 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:30:58,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:30:58,051 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:30:58,051 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:30:59,571 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:30:59,896 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:30:59,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:30:59,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2021-11-21 00:30:59,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550074183] [2021-11-21 00:30:59,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:30:59,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 00:30:59,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:30:59,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 00:30:59,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-11-21 00:30:59,899 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:00,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:31:00,651 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2021-11-21 00:31:00,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-21 00:31:00,652 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-21 00:31:00,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:31:00,653 INFO L225 Difference]: With dead ends: 78 [2021-11-21 00:31:00,653 INFO L226 Difference]: Without dead ends: 77 [2021-11-21 00:31:00,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=468, Invalid=1982, Unknown=0, NotChecked=0, Total=2450 [2021-11-21 00:31:00,656 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 127 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:31:00,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 7 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:31:00,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-21 00:31:00,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2021-11-21 00:31:00,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 53 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:00,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2021-11-21 00:31:00,670 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 15 [2021-11-21 00:31:00,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:31:00,670 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2021-11-21 00:31:00,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:00,671 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2021-11-21 00:31:00,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 00:31:00,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:31:00,672 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 00:31:00,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:31:00,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:31:00,898 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:31:00,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:31:00,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1617614149, now seen corresponding path program 2 times [2021-11-21 00:31:00,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:31:00,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170584441] [2021-11-21 00:31:00,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:31:00,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:31:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:31:00,968 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:31:00,969 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:31:00,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170584441] [2021-11-21 00:31:00,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170584441] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:31:00,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083904921] [2021-11-21 00:31:00,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:31:00,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:31:00,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:31:00,971 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:31:00,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:31:01,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 00:31:01,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:31:01,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:31:01,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:31:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:31:01,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:31:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:31:01,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083904921] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:31:01,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [764347875] [2021-11-21 00:31:01,481 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:31:01,481 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:31:01,482 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:31:01,482 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:31:01,482 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:31:03,343 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:31:03,641 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:31:03,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:31:03,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2021-11-21 00:31:03,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772552777] [2021-11-21 00:31:03,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:31:03,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 00:31:03,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:31:03,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 00:31:03,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-11-21 00:31:03,644 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:04,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:31:04,021 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2021-11-21 00:31:04,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 00:31:04,021 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-21 00:31:04,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:31:04,022 INFO L225 Difference]: With dead ends: 105 [2021-11-21 00:31:04,023 INFO L226 Difference]: Without dead ends: 55 [2021-11-21 00:31:04,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 00:31:04,025 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:31:04,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 1 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:31:04,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-21 00:31:04,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-11-21 00:31:04,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 1.2) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:04,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-11-21 00:31:04,036 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 21 [2021-11-21 00:31:04,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:31:04,037 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-11-21 00:31:04,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:04,038 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-11-21 00:31:04,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-21 00:31:04,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:31:04,039 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 1, 1, 1] [2021-11-21 00:31:04,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:31:04,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:31:04,254 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:31:04,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:31:04,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1051840471, now seen corresponding path program 3 times [2021-11-21 00:31:04,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:31:04,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148820268] [2021-11-21 00:31:04,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:31:04,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:31:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:31:04,407 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:31:04,407 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:31:04,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148820268] [2021-11-21 00:31:04,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148820268] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:31:04,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789827774] [2021-11-21 00:31:04,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:31:04,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:31:04,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:31:04,409 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:31:04,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:31:04,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:31:04,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:31:04,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:31:04,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:31:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:31:04,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:31:05,019 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:31:05,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789827774] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:31:05,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [189794709] [2021-11-21 00:31:05,023 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:31:05,023 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:31:05,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:31:05,024 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:31:05,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:31:06,712 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:31:07,126 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:31:07,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:31:07,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2021-11-21 00:31:07,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178455087] [2021-11-21 00:31:07,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:31:07,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-21 00:31:07,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:31:07,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-21 00:31:07,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 00:31:07,129 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:07,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:31:07,853 INFO L93 Difference]: Finished difference Result 152 states and 176 transitions. [2021-11-21 00:31:07,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 00:31:07,854 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-21 00:31:07,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:31:07,856 INFO L225 Difference]: With dead ends: 152 [2021-11-21 00:31:07,856 INFO L226 Difference]: Without dead ends: 127 [2021-11-21 00:31:07,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=467, Invalid=2185, Unknown=0, NotChecked=0, Total=2652 [2021-11-21 00:31:07,858 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 103 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:31:07,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 1 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:31:07,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-21 00:31:07,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 106. [2021-11-21 00:31:07,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 104 states have (on average 1.1923076923076923) internal successors, (124), 105 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:07,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2021-11-21 00:31:07,874 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 25 [2021-11-21 00:31:07,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:31:07,874 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2021-11-21 00:31:07,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:07,874 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2021-11-21 00:31:07,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 00:31:07,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:31:07,876 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 1, 1, 1] [2021-11-21 00:31:07,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:31:08,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:31:08,090 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:31:08,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:31:08,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1378554212, now seen corresponding path program 4 times [2021-11-21 00:31:08,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:31:08,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125783073] [2021-11-21 00:31:08,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:31:08,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:31:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:31:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:31:08,168 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:31:08,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125783073] [2021-11-21 00:31:08,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125783073] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:31:08,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750943399] [2021-11-21 00:31:08,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:31:08,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:31:08,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:31:08,170 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:31:08,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:31:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:31:08,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:31:08,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:31:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:31:08,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:31:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:31:08,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750943399] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:31:08,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [539737933] [2021-11-21 00:31:08,541 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:31:08,541 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:31:08,542 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:31:08,542 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:31:08,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:31:10,026 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:31:10,350 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:31:10,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:31:10,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2021-11-21 00:31:10,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916842317] [2021-11-21 00:31:10,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:31:10,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-21 00:31:10,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:31:10,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-21 00:31:10,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-11-21 00:31:10,352 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 23 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:12,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:31:12,519 INFO L93 Difference]: Finished difference Result 289 states and 365 transitions. [2021-11-21 00:31:12,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-21 00:31:12,520 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-21 00:31:12,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:31:12,524 INFO L225 Difference]: With dead ends: 289 [2021-11-21 00:31:12,524 INFO L226 Difference]: Without dead ends: 287 [2021-11-21 00:31:12,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3979 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1970, Invalid=9372, Unknown=0, NotChecked=0, Total=11342 [2021-11-21 00:31:12,532 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 164 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:31:12,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 5 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 00:31:12,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-21 00:31:12,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 200. [2021-11-21 00:31:12,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 198 states have (on average 1.207070707070707) internal successors, (239), 199 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:12,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 239 transitions. [2021-11-21 00:31:12,565 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 239 transitions. Word has length 28 [2021-11-21 00:31:12,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:31:12,566 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 239 transitions. [2021-11-21 00:31:12,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:12,566 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 239 transitions. [2021-11-21 00:31:12,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 00:31:12,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:31:12,569 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1] [2021-11-21 00:31:12,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:31:12,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 00:31:12,793 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:31:12,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:31:12,794 INFO L85 PathProgramCache]: Analyzing trace with hash -378448526, now seen corresponding path program 2 times [2021-11-21 00:31:12,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:31:12,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625494043] [2021-11-21 00:31:12,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:31:12,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:31:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:31:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-21 00:31:12,841 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:31:12,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625494043] [2021-11-21 00:31:12,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625494043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:31:12,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953756359] [2021-11-21 00:31:12,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:31:12,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:31:12,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:31:12,844 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:31:12,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:31:12,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-21 00:31:12,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:31:12,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:31:12,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:31:12,962 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-21 00:31:12,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:31:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-21 00:31:13,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953756359] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:31:13,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1184916707] [2021-11-21 00:31:13,060 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:31:13,060 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:31:13,060 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:31:13,061 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:31:13,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:31:14,617 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:31:14,832 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:31:14,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:31:14,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2021-11-21 00:31:14,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828882470] [2021-11-21 00:31:14,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:31:14,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:31:14,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:31:14,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:31:14,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:31:14,835 INFO L87 Difference]: Start difference. First operand 200 states and 239 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:14,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:31:14,868 INFO L93 Difference]: Finished difference Result 200 states and 239 transitions. [2021-11-21 00:31:14,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:31:14,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-21 00:31:14,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:31:14,871 INFO L225 Difference]: With dead ends: 200 [2021-11-21 00:31:14,872 INFO L226 Difference]: Without dead ends: 199 [2021-11-21 00:31:14,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:31:14,873 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:31:14,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 4 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:31:14,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-21 00:31:14,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 178. [2021-11-21 00:31:14,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.1864406779661016) internal successors, (210), 177 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:14,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 210 transitions. [2021-11-21 00:31:14,926 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 210 transitions. Word has length 36 [2021-11-21 00:31:14,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:31:14,928 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 210 transitions. [2021-11-21 00:31:14,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:14,928 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 210 transitions. [2021-11-21 00:31:14,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 00:31:14,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:31:14,936 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 1, 1, 1] [2021-11-21 00:31:14,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 00:31:15,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 00:31:15,162 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:31:15,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:31:15,162 INFO L85 PathProgramCache]: Analyzing trace with hash -378449308, now seen corresponding path program 5 times [2021-11-21 00:31:15,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:31:15,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088911609] [2021-11-21 00:31:15,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:31:15,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:31:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:31:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:31:15,267 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:31:15,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088911609] [2021-11-21 00:31:15,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088911609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:31:15,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652532057] [2021-11-21 00:31:15,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:31:15,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:31:15,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:31:15,270 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:31:15,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:31:15,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-21 00:31:15,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:31:15,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:31:15,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:31:15,480 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:31:15,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:31:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:31:15,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652532057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:31:15,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [23090667] [2021-11-21 00:31:15,692 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:31:15,692 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:31:15,693 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:31:15,693 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:31:15,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:31:17,465 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:31:17,782 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:31:17,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:31:17,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-11-21 00:31:17,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754599724] [2021-11-21 00:31:17,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:31:17,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-21 00:31:17,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:31:17,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-21 00:31:17,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-11-21 00:31:17,784 INFO L87 Difference]: Start difference. First operand 178 states and 210 transitions. Second operand has 21 states, 20 states have (on average 3.85) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:31:19,523 INFO L93 Difference]: Finished difference Result 1038 states and 1235 transitions. [2021-11-21 00:31:19,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-21 00:31:19,523 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.85) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-21 00:31:19,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:31:19,530 INFO L225 Difference]: With dead ends: 1038 [2021-11-21 00:31:19,530 INFO L226 Difference]: Without dead ends: 1037 [2021-11-21 00:31:19,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3196 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1912, Invalid=7208, Unknown=0, NotChecked=0, Total=9120 [2021-11-21 00:31:19,536 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 277 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:31:19,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 13 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:31:19,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-11-21 00:31:19,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 325. [2021-11-21 00:31:19,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.1666666666666667) internal successors, (378), 324 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:19,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 378 transitions. [2021-11-21 00:31:19,584 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 378 transitions. Word has length 36 [2021-11-21 00:31:19,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:31:19,585 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 378 transitions. [2021-11-21 00:31:19,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.85) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:19,585 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 378 transitions. [2021-11-21 00:31:19,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 00:31:19,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:31:19,587 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 1, 1, 1] [2021-11-21 00:31:19,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:31:19,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:31:19,798 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:31:19,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:31:19,798 INFO L85 PathProgramCache]: Analyzing trace with hash 843837804, now seen corresponding path program 6 times [2021-11-21 00:31:19,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:31:19,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165636608] [2021-11-21 00:31:19,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:31:19,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:31:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:31:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 47 proven. 140 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:31:19,960 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:31:19,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165636608] [2021-11-21 00:31:19,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165636608] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:31:19,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670282441] [2021-11-21 00:31:19,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:31:19,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:31:19,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:31:19,961 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:31:19,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:31:20,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:31:20,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:31:20,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 00:31:20,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:31:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 27 proven. 156 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:31:20,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:31:20,748 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 10 proven. 173 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:31:20,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670282441] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:31:20,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [757503448] [2021-11-21 00:31:20,750 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:31:20,750 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:31:20,751 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:31:20,751 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:31:20,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:31:21,868 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:31:22,209 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:31:22,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:31:22,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 33 [2021-11-21 00:31:22,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439173529] [2021-11-21 00:31:22,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:31:22,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-21 00:31:22,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:31:22,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-21 00:31:22,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1446, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 00:31:22,212 INFO L87 Difference]: Start difference. First operand 325 states and 378 transitions. Second operand has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:24,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:31:24,827 INFO L93 Difference]: Finished difference Result 843 states and 989 transitions. [2021-11-21 00:31:24,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-21 00:31:24,828 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-21 00:31:24,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:31:24,831 INFO L225 Difference]: With dead ends: 843 [2021-11-21 00:31:24,831 INFO L226 Difference]: Without dead ends: 650 [2021-11-21 00:31:24,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3487 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2141, Invalid=10069, Unknown=0, NotChecked=0, Total=12210 [2021-11-21 00:31:24,837 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 266 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:31:24,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 1 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 00:31:24,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-11-21 00:31:24,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 545. [2021-11-21 00:31:24,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 1.1672794117647058) internal successors, (635), 544 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:24,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 635 transitions. [2021-11-21 00:31:24,899 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 635 transitions. Word has length 48 [2021-11-21 00:31:24,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:31:24,899 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 635 transitions. [2021-11-21 00:31:24,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:24,899 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 635 transitions. [2021-11-21 00:31:24,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 00:31:24,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:31:24,901 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 5, 4, 4, 4, 1, 1, 1] [2021-11-21 00:31:24,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:31:25,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:31:25,114 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:31:25,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:31:25,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1389636412, now seen corresponding path program 7 times [2021-11-21 00:31:25,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:31:25,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405954098] [2021-11-21 00:31:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:31:25,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:31:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:31:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 231 proven. 136 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-21 00:31:25,233 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:31:25,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405954098] [2021-11-21 00:31:25,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405954098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:31:25,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634713244] [2021-11-21 00:31:25,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:31:25,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:31:25,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:31:25,235 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:31:25,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 00:31:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:31:25,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 00:31:25,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:31:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 249 proven. 118 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-21 00:31:25,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:31:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 236 proven. 131 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-21 00:31:25,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634713244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:31:25,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1594722323] [2021-11-21 00:31:25,857 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:31:25,857 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:31:25,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:31:25,858 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:31:25,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:31:26,913 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:31:27,222 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:31:27,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:31:27,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2021-11-21 00:31:27,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568170478] [2021-11-21 00:31:27,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:31:27,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-21 00:31:27,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:31:27,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-21 00:31:27,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-11-21 00:31:27,224 INFO L87 Difference]: Start difference. First operand 545 states and 635 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:27,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:31:27,605 INFO L93 Difference]: Finished difference Result 588 states and 687 transitions. [2021-11-21 00:31:27,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-21 00:31:27,606 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-21 00:31:27,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:31:27,608 INFO L225 Difference]: With dead ends: 588 [2021-11-21 00:31:27,608 INFO L226 Difference]: Without dead ends: 469 [2021-11-21 00:31:27,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=281, Invalid=1789, Unknown=0, NotChecked=0, Total=2070 [2021-11-21 00:31:27,610 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 54 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:31:27,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 1 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:31:27,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-11-21 00:31:27,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 466. [2021-11-21 00:31:27,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 1.1548387096774193) internal successors, (537), 465 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:27,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 537 transitions. [2021-11-21 00:31:27,652 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 537 transitions. Word has length 66 [2021-11-21 00:31:27,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:31:27,653 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 537 transitions. [2021-11-21 00:31:27,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:27,653 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 537 transitions. [2021-11-21 00:31:27,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-21 00:31:27,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:31:27,655 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 8, 7, 7, 7, 1, 1, 1] [2021-11-21 00:31:27,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:31:27,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 00:31:27,856 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:31:27,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:31:27,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1280857771, now seen corresponding path program 8 times [2021-11-21 00:31:27,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:31:27,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694899454] [2021-11-21 00:31:27,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:31:27,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:31:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:31:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 390 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 00:31:28,001 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:31:28,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694899454] [2021-11-21 00:31:28,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694899454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:31:28,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189476757] [2021-11-21 00:31:28,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:31:28,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:31:28,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:31:28,003 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:31:28,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 00:31:28,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-21 00:31:28,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:31:28,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 00:31:28,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:31:28,352 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 181 proven. 175 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-21 00:31:28,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:31:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 181 proven. 175 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-21 00:31:28,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189476757] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:31:28,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1949288628] [2021-11-21 00:31:28,830 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:31:28,830 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:31:28,830 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:31:28,831 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:31:28,831 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:31:29,810 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:31:30,137 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:31:30,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:31:30,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 36 [2021-11-21 00:31:30,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681486619] [2021-11-21 00:31:30,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:31:30,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-21 00:31:30,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:31:30,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-21 00:31:30,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1723, Unknown=0, NotChecked=0, Total=1980 [2021-11-21 00:31:30,140 INFO L87 Difference]: Start difference. First operand 466 states and 537 transitions. Second operand has 37 states, 36 states have (on average 4.027777777777778) internal successors, (145), 37 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:47,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:31:47,458 INFO L93 Difference]: Finished difference Result 1449 states and 1739 transitions. [2021-11-21 00:31:47,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 300 states. [2021-11-21 00:31:47,459 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.027777777777778) internal successors, (145), 37 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-21 00:31:47,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:31:47,467 INFO L225 Difference]: With dead ends: 1449 [2021-11-21 00:31:47,467 INFO L226 Difference]: Without dead ends: 1448 [2021-11-21 00:31:47,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52013 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=19984, Invalid=93922, Unknown=0, NotChecked=0, Total=113906 [2021-11-21 00:31:47,483 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 1947 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 1335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1947 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 2214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1335 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:31:47,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1947 Valid, 2 Invalid, 2214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1335 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-21 00:31:47,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2021-11-21 00:31:47,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 763. [2021-11-21 00:31:47,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 1.1797900262467191) internal successors, (899), 762 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:47,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 899 transitions. [2021-11-21 00:31:47,574 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 899 transitions. Word has length 69 [2021-11-21 00:31:47,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:31:47,575 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 899 transitions. [2021-11-21 00:31:47,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.027777777777778) internal successors, (145), 37 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:47,575 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 899 transitions. [2021-11-21 00:31:47,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-21 00:31:47,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:31:47,577 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 1, 1, 1] [2021-11-21 00:31:47,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:31:47,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-21 00:31:47,793 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:31:47,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:31:47,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2003326660, now seen corresponding path program 9 times [2021-11-21 00:31:47,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:31:47,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149132321] [2021-11-21 00:31:47,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:31:47,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:31:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:31:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:31:48,032 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:31:48,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149132321] [2021-11-21 00:31:48,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149132321] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:31:48,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717346915] [2021-11-21 00:31:48,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:31:48,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:31:48,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:31:48,035 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:31:48,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 00:31:48,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:31:48,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:31:48,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 00:31:48,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:31:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:31:48,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:31:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:31:48,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717346915] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:31:48,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [228259595] [2021-11-21 00:31:48,872 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:31:48,872 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:31:48,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:31:48,873 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:31:48,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:31:50,113 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:31:50,450 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:31:50,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:31:50,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2021-11-21 00:31:50,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379375561] [2021-11-21 00:31:50,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:31:50,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-21 00:31:50,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:31:50,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-21 00:31:50,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1273, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 00:31:50,453 INFO L87 Difference]: Start difference. First operand 763 states and 899 transitions. Second operand has 33 states, 32 states have (on average 5.03125) internal successors, (161), 33 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:55,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:31:55,048 INFO L93 Difference]: Finished difference Result 6637 states and 7942 transitions. [2021-11-21 00:31:55,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2021-11-21 00:31:55,048 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 5.03125) internal successors, (161), 33 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-21 00:31:55,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:31:55,079 INFO L225 Difference]: With dead ends: 6637 [2021-11-21 00:31:55,080 INFO L226 Difference]: Without dead ends: 6636 [2021-11-21 00:31:55,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17253 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=9156, Invalid=32256, Unknown=0, NotChecked=0, Total=41412 [2021-11-21 00:31:55,084 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 484 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:31:55,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 18 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:31:55,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6636 states. [2021-11-21 00:31:55,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6636 to 2719. [2021-11-21 00:31:55,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2719 states, 2718 states have (on average 1.1707137601177335) internal successors, (3182), 2718 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:55,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 3182 transitions. [2021-11-21 00:31:55,425 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 3182 transitions. Word has length 78 [2021-11-21 00:31:55,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:31:55,425 INFO L470 AbstractCegarLoop]: Abstraction has 2719 states and 3182 transitions. [2021-11-21 00:31:55,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 5.03125) internal successors, (161), 33 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:31:55,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 3182 transitions. [2021-11-21 00:31:55,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-21 00:31:55,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:31:55,431 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 17, 16, 16, 16, 1, 1, 1] [2021-11-21 00:31:55,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-21 00:31:55,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:31:55,645 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:31:55,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:31:55,646 INFO L85 PathProgramCache]: Analyzing trace with hash -958690084, now seen corresponding path program 10 times [2021-11-21 00:31:55,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:31:55,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595929940] [2021-11-21 00:31:55,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:31:55,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:31:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:31:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2051 backedges. 0 proven. 1364 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2021-11-21 00:31:55,813 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:31:55,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595929940] [2021-11-21 00:31:55,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595929940] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:31:55,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243893689] [2021-11-21 00:31:55,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:31:55,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:31:55,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:31:55,815 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:31:55,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 00:31:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:31:55,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-21 00:31:55,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:31:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2051 backedges. 911 proven. 1069 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-21 00:31:56,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:31:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2051 backedges. 900 proven. 1080 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-21 00:31:57,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243893689] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:31:57,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1847937703] [2021-11-21 00:31:57,140 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:31:57,140 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:31:57,141 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:31:57,141 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:31:57,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:31:58,292 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:31:58,600 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:31:58,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:31:58,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 23] total 42 [2021-11-21 00:31:58,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006279738] [2021-11-21 00:31:58,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:31:58,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-21 00:31:58,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:31:58,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-21 00:31:58,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=2154, Unknown=0, NotChecked=0, Total=2450 [2021-11-21 00:31:58,603 INFO L87 Difference]: Start difference. First operand 2719 states and 3182 transitions. Second operand has 42 states, 42 states have (on average 4.761904761904762) internal successors, (200), 42 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:32:09,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:32:09,599 INFO L93 Difference]: Finished difference Result 5393 states and 6338 transitions. [2021-11-21 00:32:09,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 318 states. [2021-11-21 00:32:09,599 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.761904761904762) internal successors, (200), 42 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-21 00:32:09,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:32:09,619 INFO L225 Difference]: With dead ends: 5393 [2021-11-21 00:32:09,620 INFO L226 Difference]: Without dead ends: 3358 [2021-11-21 00:32:09,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 768 GetRequests, 414 SyntacticMatches, 1 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51118 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=13920, Invalid=111750, Unknown=0, NotChecked=0, Total=125670 [2021-11-21 00:32:09,637 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 356 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2187 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 2477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 2187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:32:09,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 1 Invalid, 2477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 2187 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-21 00:32:09,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3358 states. [2021-11-21 00:32:09,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3358 to 3036. [2021-11-21 00:32:09,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3036 states, 3035 states have (on average 1.1499176276771006) internal successors, (3490), 3035 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:32:09,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3036 states to 3036 states and 3490 transitions. [2021-11-21 00:32:09,973 INFO L78 Accepts]: Start accepts. Automaton has 3036 states and 3490 transitions. Word has length 150 [2021-11-21 00:32:09,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:32:09,974 INFO L470 AbstractCegarLoop]: Abstraction has 3036 states and 3490 transitions. [2021-11-21 00:32:09,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.761904761904762) internal successors, (200), 42 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:32:09,975 INFO L276 IsEmpty]: Start isEmpty. Operand 3036 states and 3490 transitions. [2021-11-21 00:32:09,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-21 00:32:09,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:32:09,983 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 18, 17, 17, 17, 1, 1, 1] [2021-11-21 00:32:10,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-21 00:32:10,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-21 00:32:10,198 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:32:10,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:32:10,198 INFO L85 PathProgramCache]: Analyzing trace with hash 22000467, now seen corresponding path program 11 times [2021-11-21 00:32:10,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:32:10,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193665391] [2021-11-21 00:32:10,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:32:10,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:32:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:32:10,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 1556 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-21 00:32:10,463 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:32:10,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193665391] [2021-11-21 00:32:10,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193665391] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:32:10,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874153709] [2021-11-21 00:32:10,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:32:10,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:32:10,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:32:10,466 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:32:10,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 00:32:10,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-11-21 00:32:10,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:32:10,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 00:32:10,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:32:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 969 proven. 1027 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-21 00:32:11,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:32:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 969 proven. 1027 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-21 00:32:12,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874153709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:32:12,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1245988617] [2021-11-21 00:32:12,435 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:32:12,435 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:32:12,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:32:12,435 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:32:12,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:32:13,850 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:32:14,266 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:32:14,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:32:14,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 50 [2021-11-21 00:32:14,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332353718] [2021-11-21 00:32:14,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:32:14,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-21 00:32:14,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:32:14,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-21 00:32:14,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=2875, Unknown=0, NotChecked=0, Total=3422 [2021-11-21 00:32:14,268 INFO L87 Difference]: Start difference. First operand 3036 states and 3490 transitions. Second operand has 51 states, 50 states have (on average 4.9) internal successors, (245), 51 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:02,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:02,228 INFO L93 Difference]: Finished difference Result 8111 states and 9603 transitions. [2021-11-21 00:33:02,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 581 states. [2021-11-21 00:33:02,229 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.9) internal successors, (245), 51 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-11-21 00:33:02,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:02,258 INFO L225 Difference]: With dead ends: 8111 [2021-11-21 00:33:02,258 INFO L226 Difference]: Without dead ends: 8110 [2021-11-21 00:33:02,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1071 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 631 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197415 ImplicationChecksByTransitivity, 45.8s TimeCoverageRelationStatistics Valid=73674, Invalid=326382, Unknown=0, NotChecked=0, Total=400056 [2021-11-21 00:33:02,287 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 3490 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 2548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3490 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 3741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2548 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:02,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3490 Valid, 2 Invalid, 3741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2548 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-21 00:33:02,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8110 states. [2021-11-21 00:33:02,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8110 to 3187. [2021-11-21 00:33:02,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3187 states, 3186 states have (on average 1.155367231638418) internal successors, (3681), 3186 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:02,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3187 states to 3187 states and 3681 transitions. [2021-11-21 00:33:02,932 INFO L78 Accepts]: Start accepts. Automaton has 3187 states and 3681 transitions. Word has length 157 [2021-11-21 00:33:02,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:02,932 INFO L470 AbstractCegarLoop]: Abstraction has 3187 states and 3681 transitions. [2021-11-21 00:33:02,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.9) internal successors, (245), 51 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:02,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3187 states and 3681 transitions. [2021-11-21 00:33:02,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-21 00:33:02,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:02,938 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 22, 22, 22, 1, 1, 1] [2021-11-21 00:33:02,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-21 00:33:03,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-21 00:33:03,154 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:33:03,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:03,154 INFO L85 PathProgramCache]: Analyzing trace with hash -38144124, now seen corresponding path program 12 times [2021-11-21 00:33:03,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:03,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686970231] [2021-11-21 00:33:03,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:03,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:03,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2279 backedges. 0 proven. 2257 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 00:33:03,536 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:03,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686970231] [2021-11-21 00:33:03,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686970231] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:33:03,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237600038] [2021-11-21 00:33:03,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:33:03,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:33:03,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:33:03,538 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:33:03,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-21 00:33:03,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:33:03,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:33:03,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-21 00:33:03,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:33:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2279 backedges. 0 proven. 2257 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 00:33:04,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:33:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2279 backedges. 0 proven. 2257 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 00:33:05,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237600038] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:33:05,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [427380437] [2021-11-21 00:33:05,023 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:33:05,023 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:33:05,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:33:05,023 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:33:05,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:33:06,311 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:33:06,585 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:33:06,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:33:06,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 56 [2021-11-21 00:33:06,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147914451] [2021-11-21 00:33:06,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:33:06,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-21 00:33:06,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:06,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-21 00:33:06,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1232, Invalid=2928, Unknown=0, NotChecked=0, Total=4160 [2021-11-21 00:33:06,587 INFO L87 Difference]: Start difference. First operand 3187 states and 3681 transitions. Second operand has 57 states, 56 states have (on average 5.875) internal successors, (329), 57 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:28,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:28,343 INFO L93 Difference]: Finished difference Result 40994 states and 48938 transitions. [2021-11-21 00:33:28,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 406 states. [2021-11-21 00:33:28,344 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 5.875) internal successors, (329), 57 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2021-11-21 00:33:28,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:28,488 INFO L225 Difference]: With dead ends: 40994 [2021-11-21 00:33:28,488 INFO L226 Difference]: Without dead ends: 40993 [2021-11-21 00:33:28,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 866 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 418 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77108 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=39703, Invalid=136277, Unknown=0, NotChecked=0, Total=175980 [2021-11-21 00:33:28,510 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 1543 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 986 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1543 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 986 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:28,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1543 Valid, 46 Invalid, 1611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [986 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 00:33:28,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40993 states. [2021-11-21 00:33:30,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40993 to 14980. [2021-11-21 00:33:30,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14980 states, 14979 states have (on average 1.1738433807330262) internal successors, (17583), 14979 states have internal predecessors, (17583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:30,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14980 states to 14980 states and 17583 transitions. [2021-11-21 00:33:30,406 INFO L78 Accepts]: Start accepts. Automaton has 14980 states and 17583 transitions. Word has length 162 [2021-11-21 00:33:30,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:30,407 INFO L470 AbstractCegarLoop]: Abstraction has 14980 states and 17583 transitions. [2021-11-21 00:33:30,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 5.875) internal successors, (329), 57 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:30,407 INFO L276 IsEmpty]: Start isEmpty. Operand 14980 states and 17583 transitions. [2021-11-21 00:33:30,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-21 00:33:30,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:30,435 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 53, 31, 30, 30, 30, 1, 1, 1] [2021-11-21 00:33:30,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-21 00:33:30,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:33:30,650 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:33:30,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:30,650 INFO L85 PathProgramCache]: Analyzing trace with hash -57870388, now seen corresponding path program 13 times [2021-11-21 00:33:30,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:30,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750600438] [2021-11-21 00:33:30,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:30,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:31,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7630 backedges. 0 proven. 3521 refuted. 0 times theorem prover too weak. 4109 trivial. 0 not checked. [2021-11-21 00:33:31,129 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:31,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750600438] [2021-11-21 00:33:31,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750600438] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:33:31,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896377052] [2021-11-21 00:33:31,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:33:31,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:33:31,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:33:31,131 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:33:31,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 00:33:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:31,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 00:33:31,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:33:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7630 backedges. 4489 proven. 1688 refuted. 0 times theorem prover too weak. 1453 trivial. 0 not checked. [2021-11-21 00:33:32,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:33:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7630 backedges. 4474 proven. 1703 refuted. 0 times theorem prover too weak. 1453 trivial. 0 not checked. [2021-11-21 00:33:33,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896377052] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:33:33,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [929844910] [2021-11-21 00:33:33,196 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:33:33,196 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:33:33,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:33:33,197 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:33:33,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:33:34,187 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:33:34,578 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:33:34,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:33:34,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27, 27] total 48 [2021-11-21 00:33:34,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859934956] [2021-11-21 00:33:34,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:33:34,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-21 00:33:34,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:34,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-21 00:33:34,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=2675, Unknown=0, NotChecked=0, Total=3080 [2021-11-21 00:33:34,580 INFO L87 Difference]: Start difference. First operand 14980 states and 17583 transitions. Second operand has 48 states, 48 states have (on average 5.041666666666667) internal successors, (242), 48 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:54,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:54,088 INFO L93 Difference]: Finished difference Result 28870 states and 34023 transitions. [2021-11-21 00:33:54,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 513 states. [2021-11-21 00:33:54,088 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 5.041666666666667) internal successors, (242), 48 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 284 [2021-11-21 00:33:54,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:54,135 INFO L225 Difference]: With dead ends: 28870 [2021-11-21 00:33:54,135 INFO L226 Difference]: Without dead ends: 15715 [2021-11-21 00:33:54,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1365 GetRequests, 812 SyntacticMatches, 1 SemanticMatches, 552 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134839 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=32059, Invalid=274303, Unknown=0, NotChecked=0, Total=306362 [2021-11-21 00:33:54,178 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 425 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3008 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 3366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 3008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:54,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 1 Invalid, 3366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 3008 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-21 00:33:54,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15715 states. [2021-11-21 00:33:55,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15715 to 15006. [2021-11-21 00:33:55,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15006 states, 15005 states have (on average 1.16974341886038) internal successors, (17552), 15005 states have internal predecessors, (17552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:55,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15006 states to 15006 states and 17552 transitions. [2021-11-21 00:33:55,690 INFO L78 Accepts]: Start accepts. Automaton has 15006 states and 17552 transitions. Word has length 284 [2021-11-21 00:33:55,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:55,691 INFO L470 AbstractCegarLoop]: Abstraction has 15006 states and 17552 transitions. [2021-11-21 00:33:55,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 5.041666666666667) internal successors, (242), 48 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:55,691 INFO L276 IsEmpty]: Start isEmpty. Operand 15006 states and 17552 transitions. [2021-11-21 00:33:55,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-11-21 00:33:55,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:55,711 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 54, 32, 31, 31, 31, 1, 1, 1] [2021-11-21 00:33:55,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-21 00:33:55,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:33:55,925 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:33:55,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:55,926 INFO L85 PathProgramCache]: Analyzing trace with hash 2110241027, now seen corresponding path program 14 times [2021-11-21 00:33:55,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:55,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077227286] [2021-11-21 00:33:55,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:55,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7997 backedges. 0 proven. 3887 refuted. 0 times theorem prover too weak. 4110 trivial. 0 not checked. [2021-11-21 00:33:56,201 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:56,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077227286] [2021-11-21 00:33:56,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077227286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:33:56,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289247984] [2021-11-21 00:33:56,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:33:56,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:33:56,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:33:56,203 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:33:56,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-21 00:33:56,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2021-11-21 00:33:56,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:33:56,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-21 00:33:56,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:33:57,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7997 backedges. 2659 proven. 4891 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2021-11-21 00:33:57,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:33:59,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7997 backedges. 2659 proven. 4891 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2021-11-21 00:33:59,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289247984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:33:59,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1709206748] [2021-11-21 00:33:59,808 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:33:59,808 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:33:59,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:33:59,809 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:33:59,809 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:34:00,806 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:34:01,232 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:34:01,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:34:01,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 30, 30] total 76 [2021-11-21 00:34:01,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984530718] [2021-11-21 00:34:01,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:34:01,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-21 00:34:01,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:34:01,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-21 00:34:01,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1627, Invalid=5513, Unknown=0, NotChecked=0, Total=7140 [2021-11-21 00:34:01,236 INFO L87 Difference]: Start difference. First operand 15006 states and 17552 transitions. Second operand has 77 states, 76 states have (on average 5.618421052631579) internal successors, (427), 77 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:36:28,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:36:28,406 INFO L93 Difference]: Finished difference Result 49419 states and 59062 transitions. [2021-11-21 00:36:28,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1186 states. [2021-11-21 00:36:28,407 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 5.618421052631579) internal successors, (427), 77 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 291 [2021-11-21 00:36:28,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:36:28,496 INFO L225 Difference]: With dead ends: 49419 [2021-11-21 00:36:28,496 INFO L226 Difference]: Without dead ends: 49418 [2021-11-21 00:36:28,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2092 GetRequests, 830 SyntacticMatches, 0 SemanticMatches, 1262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843227 ImplicationChecksByTransitivity, 137.2s TimeCoverageRelationStatistics Valid=308080, Invalid=1288352, Unknown=0, NotChecked=0, Total=1596432 [2021-11-21 00:36:28,609 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 6203 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1919 mSolverCounterSat, 4697 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6203 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 6616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4697 IncrementalHoareTripleChecker+Valid, 1919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:36:28,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6203 Valid, 2 Invalid, 6616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4697 Valid, 1919 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-21 00:36:28,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49418 states. [2021-11-21 00:36:31,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49418 to 18674. [2021-11-21 00:36:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18674 states, 18673 states have (on average 1.1712097681143898) internal successors, (21870), 18673 states have internal predecessors, (21870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:36:31,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18674 states to 18674 states and 21870 transitions. [2021-11-21 00:36:31,742 INFO L78 Accepts]: Start accepts. Automaton has 18674 states and 21870 transitions. Word has length 291 [2021-11-21 00:36:31,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:36:31,743 INFO L470 AbstractCegarLoop]: Abstraction has 18674 states and 21870 transitions. [2021-11-21 00:36:31,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 5.618421052631579) internal successors, (427), 77 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:36:31,744 INFO L276 IsEmpty]: Start isEmpty. Operand 18674 states and 21870 transitions. [2021-11-21 00:36:31,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-11-21 00:36:31,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:36:31,770 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 46, 46, 46, 1, 1, 1] [2021-11-21 00:36:31,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-21 00:36:31,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:31,998 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:36:31,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:36:31,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1691588868, now seen corresponding path program 15 times [2021-11-21 00:36:31,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:36:31,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204899697] [2021-11-21 00:36:31,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:31,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:36:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9731 backedges. 0 proven. 9685 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-21 00:36:33,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:36:33,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204899697] [2021-11-21 00:36:33,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204899697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:36:33,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109116078] [2021-11-21 00:36:33,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:36:33,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:33,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:36:33,225 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:36:33,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3631e7c1-5e91-418e-8c69-687b87f410eb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-21 00:36:33,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:36:33,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:36:33,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-21 00:36:33,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:36:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9731 backedges. 0 proven. 9685 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-21 00:36:34,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:36:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9731 backedges. 0 proven. 9685 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-21 00:36:37,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109116078] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:36:37,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [464437828] [2021-11-21 00:36:37,063 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:36:37,063 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:36:37,064 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:36:37,064 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:36:37,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:36:38,051 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:36:38,467 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:36:38,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:36:38,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 104 [2021-11-21 00:36:38,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566513507] [2021-11-21 00:36:38,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:36:38,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-21 00:36:38,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:36:38,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-21 00:36:38,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4723, Invalid=7933, Unknown=0, NotChecked=0, Total=12656 [2021-11-21 00:36:38,472 INFO L87 Difference]: Start difference. First operand 18674 states and 21870 transitions. Second operand has 105 states, 104 states have (on average 6.394230769230769) internal successors, (665), 105 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:28,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:28,293 INFO L93 Difference]: Finished difference Result 214405 states and 256946 transitions. [2021-11-21 00:38:28,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 838 states. [2021-11-21 00:38:28,295 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 104 states have (on average 6.394230769230769) internal successors, (665), 105 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 330 [2021-11-21 00:38:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:28,630 INFO L225 Difference]: With dead ends: 214405 [2021-11-21 00:38:28,631 INFO L226 Difference]: Without dead ends: 214404 [2021-11-21 00:38:28,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1778 GetRequests, 928 SyntacticMatches, 0 SemanticMatches, 850 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329859 ImplicationChecksByTransitivity, 48.7s TimeCoverageRelationStatistics Valid=165198, Invalid=559854, Unknown=0, NotChecked=0, Total=725052 [2021-11-21 00:38:28,893 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 2441 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 1515 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2441 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1515 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:28,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2441 Valid, 65 Invalid, 2757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1515 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-21 00:38:29,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214404 states.