./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/Parts.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_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/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_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/Parts.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/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_c3d3ae60-f5dc-46bd-835e-672d6d297c67/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 663a2474dc11f7b5d0aa9a3ae9bbf5de1ab8d2ea5a060185a0446a8356edf6f1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:00:34,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:00:34,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:00:34,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:00:34,436 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:00:34,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:00:34,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:00:34,451 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:00:34,454 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:00:34,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:00:34,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:00:34,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:00:34,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:00:34,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:00:34,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:00:34,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:00:34,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:00:34,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:00:34,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:00:34,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:00:34,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:00:34,503 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:00:34,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:00:34,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:00:34,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:00:34,520 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:00:34,521 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:00:34,523 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:00:34,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:00:34,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:00:34,527 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:00:34,528 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:00:34,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:00:34,532 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:00:34,534 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:00:34,534 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:00:34,535 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:00:34,536 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:00:34,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:00:34,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:00:34,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:00:34,540 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-21 00:00:34,606 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:00:34,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:00:34,607 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:00:34,608 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:00:34,609 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:00:34,609 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:00:34,609 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:00:34,610 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:00:34,610 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:00:34,610 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:00:34,612 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:00:34,612 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:00:34,612 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:00:34,613 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:00:34,613 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:00:34,613 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:00:34,614 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:00:34,614 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:00:34,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:00:34,616 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 00:00:34,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:00:34,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:00:34,617 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:00:34,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:00:34,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:00:34,617 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-21 00:00:34,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:00:34,620 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:00:34,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:00:34,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:00:34,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:00:34,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:00:34,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:00:34,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:00:34,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:00:34,623 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:00:34,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:00:34,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:00:34,624 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:00:34,624 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:00:34,624 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_c3d3ae60-f5dc-46bd-835e-672d6d297c67/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 663a2474dc11f7b5d0aa9a3ae9bbf5de1ab8d2ea5a060185a0446a8356edf6f1 [2021-11-21 00:00:34,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:00:35,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:00:35,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:00:35,045 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:00:35,046 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:00:35,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/termination-numeric/Parts.c [2021-11-21 00:00:35,137 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/data/b23e2fb28/82b8a65e0e294e228ff042914db60765/FLAG7ed1afbfb [2021-11-21 00:00:35,729 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:00:35,729 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/sv-benchmarks/c/termination-numeric/Parts.c [2021-11-21 00:00:35,742 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/data/b23e2fb28/82b8a65e0e294e228ff042914db60765/FLAG7ed1afbfb [2021-11-21 00:00:36,119 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/data/b23e2fb28/82b8a65e0e294e228ff042914db60765 [2021-11-21 00:00:36,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:00:36,123 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:00:36,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:00:36,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:00:36,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:00:36,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:00:36" (1/1) ... [2021-11-21 00:00:36,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cd316a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:36, skipping insertion in model container [2021-11-21 00:00:36,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:00:36" (1/1) ... [2021-11-21 00:00:36,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:00:36,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:00:36,384 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:00:36,390 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:00:36,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:00:36,432 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:00:36,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:36 WrapperNode [2021-11-21 00:00:36,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:00:36,435 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:00:36,435 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:00:36,435 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:00:36,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:36" (1/1) ... [2021-11-21 00:00:36,450 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:36" (1/1) ... [2021-11-21 00:00:36,472 INFO L137 Inliner]: procedures = 5, calls = 6, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 40 [2021-11-21 00:00:36,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:00:36,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:00:36,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:00:36,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:00:36,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:36" (1/1) ... [2021-11-21 00:00:36,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:36" (1/1) ... [2021-11-21 00:00:36,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:36" (1/1) ... [2021-11-21 00:00:36,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:36" (1/1) ... [2021-11-21 00:00:36,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:36" (1/1) ... [2021-11-21 00:00:36,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:36" (1/1) ... [2021-11-21 00:00:36,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:36" (1/1) ... [2021-11-21 00:00:36,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:00:36,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:00:36,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:00:36,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:00:36,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:36" (1/1) ... [2021-11-21 00:00:36,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:00:36,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:00:36,562 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:00:36,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:00:36,621 INFO L130 BoogieDeclarations]: Found specification of procedure parts [2021-11-21 00:00:36,621 INFO L138 BoogieDeclarations]: Found implementation of procedure parts [2021-11-21 00:00:36,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:00:36,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:00:36,696 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:00:36,698 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:00:36,955 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:00:37,006 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:00:37,006 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 00:00:37,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:00:37 BoogieIcfgContainer [2021-11-21 00:00:37,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:00:37,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:00:37,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:00:37,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:00:37,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:00:36" (1/3) ... [2021-11-21 00:00:37,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b02c432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:00:37, skipping insertion in model container [2021-11-21 00:00:37,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:36" (2/3) ... [2021-11-21 00:00:37,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b02c432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:00:37, skipping insertion in model container [2021-11-21 00:00:37,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:00:37" (3/3) ... [2021-11-21 00:00:37,020 INFO L111 eAbstractionObserver]: Analyzing ICFG Parts.c [2021-11-21 00:00:37,026 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:00:37,026 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-21 00:00:37,099 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:00:37,109 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 00:00:37,110 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-21 00:00:37,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 25 states have (on average 1.68) internal successors, (42), 35 states have internal predecessors, (42), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:00:37,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:00:37,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:37,157 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:00:37,158 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:00:37,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:37,173 INFO L85 PathProgramCache]: Analyzing trace with hash -764829761, now seen corresponding path program 1 times [2021-11-21 00:00:37,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:37,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824493432] [2021-11-21 00:00:37,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:37,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:37,433 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 00:00:37,434 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:37,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824493432] [2021-11-21 00:00:37,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824493432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:00:37,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:00:37,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:00:37,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625376254] [2021-11-21 00:00:37,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:00:37,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:00:37,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:37,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:00:37,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:00:37,490 INFO L87 Difference]: Start difference. First operand has 41 states, 25 states have (on average 1.68) internal successors, (42), 35 states have internal predecessors, (42), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 1.5) 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 00:00:37,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:37,617 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2021-11-21 00:00:37,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:00:37,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) 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 00:00:37,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:37,631 INFO L225 Difference]: With dead ends: 82 [2021-11-21 00:00:37,632 INFO L226 Difference]: Without dead ends: 40 [2021-11-21 00:00:37,636 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 00:00:37,641 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 21 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:37,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 109 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:00:37,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-21 00:00:37,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-21 00:00:37,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.56) internal successors, (39), 34 states have internal predecessors, (39), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:00:37,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2021-11-21 00:00:37,718 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 6 [2021-11-21 00:00:37,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:37,719 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2021-11-21 00:00:37,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) 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 00:00:37,720 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2021-11-21 00:00:37,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 00:00:37,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:37,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:37,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:00:37,726 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:00:37,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:37,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1110448044, now seen corresponding path program 1 times [2021-11-21 00:00:37,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:37,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961114342] [2021-11-21 00:00:37,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:37,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:37,832 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 00:00:37,833 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:37,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961114342] [2021-11-21 00:00:37,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961114342] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:00:37,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:00:37,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:00:37,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898578888] [2021-11-21 00:00:37,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:00:37,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:00:37,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:37,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:00:37,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:00:37,843 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:00:37,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:37,957 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2021-11-21 00:00:37,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:00:37,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-21 00:00:37,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:37,961 INFO L225 Difference]: With dead ends: 96 [2021-11-21 00:00:37,962 INFO L226 Difference]: Without dead ends: 59 [2021-11-21 00:00:37,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:00:37,965 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 15 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:37,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 148 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:00:37,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-21 00:00:37,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2021-11-21 00:00:37,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5) internal successors, (51), 43 states have internal predecessors, (51), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 00:00:37,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2021-11-21 00:00:37,983 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 11 [2021-11-21 00:00:37,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:37,984 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2021-11-21 00:00:37,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:00:37,984 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2021-11-21 00:00:37,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 00:00:37,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:37,985 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:37,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:00:37,986 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:00:37,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:37,987 INFO L85 PathProgramCache]: Analyzing trace with hash -64314859, now seen corresponding path program 1 times [2021-11-21 00:00:37,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:37,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756777922] [2021-11-21 00:00:37,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:37,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:38,060 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 00:00:38,061 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:38,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756777922] [2021-11-21 00:00:38,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756777922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:00:38,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:00:38,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:00:38,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790466648] [2021-11-21 00:00:38,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:00:38,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:00:38,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:38,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:00:38,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:00:38,066 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:00:38,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:38,112 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-11-21 00:00:38,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:00:38,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-21 00:00:38,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:38,115 INFO L225 Difference]: With dead ends: 61 [2021-11-21 00:00:38,116 INFO L226 Difference]: Without dead ends: 60 [2021-11-21 00:00:38,116 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 00:00:38,118 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 5 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:38,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 119 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:00:38,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-21 00:00:38,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2021-11-21 00:00:38,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 47 states have internal predecessors, (55), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-21 00:00:38,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2021-11-21 00:00:38,139 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 12 [2021-11-21 00:00:38,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:38,140 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2021-11-21 00:00:38,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:00:38,141 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2021-11-21 00:00:38,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 00:00:38,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:38,143 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:38,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:00:38,145 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:00:38,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:38,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1993760531, now seen corresponding path program 1 times [2021-11-21 00:00:38,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:38,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764627331] [2021-11-21 00:00:38,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:38,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:38,227 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 00:00:38,228 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:38,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764627331] [2021-11-21 00:00:38,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764627331] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:00:38,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:00:38,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:00:38,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52575755] [2021-11-21 00:00:38,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:00:38,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:00:38,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:38,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:00:38,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:00:38,236 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:00:38,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:38,290 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2021-11-21 00:00:38,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:00:38,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-21 00:00:38,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:38,295 INFO L225 Difference]: With dead ends: 57 [2021-11-21 00:00:38,296 INFO L226 Difference]: Without dead ends: 56 [2021-11-21 00:00:38,296 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 00:00:38,298 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:38,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 110 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:00:38,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-21 00:00:38,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-21 00:00:38,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 38 states have (on average 1.394736842105263) internal successors, (53), 46 states have internal predecessors, (53), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-21 00:00:38,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2021-11-21 00:00:38,314 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 13 [2021-11-21 00:00:38,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:38,315 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2021-11-21 00:00:38,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:00:38,316 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2021-11-21 00:00:38,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 00:00:38,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:38,317 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:38,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:00:38,318 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:00:38,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:38,320 INFO L85 PathProgramCache]: Analyzing trace with hash -448452296, now seen corresponding path program 1 times [2021-11-21 00:00:38,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:38,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104271426] [2021-11-21 00:00:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:38,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:38,392 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 00:00:38,393 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:38,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104271426] [2021-11-21 00:00:38,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104271426] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:00:38,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:00:38,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:00:38,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340801744] [2021-11-21 00:00:38,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:00:38,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:00:38,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:38,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:00:38,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:00:38,401 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:00:38,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:38,477 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-11-21 00:00:38,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:00:38,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-21 00:00:38,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:38,480 INFO L225 Difference]: With dead ends: 61 [2021-11-21 00:00:38,480 INFO L226 Difference]: Without dead ends: 60 [2021-11-21 00:00:38,481 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 00:00:38,483 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:38,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 116 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:00:38,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-21 00:00:38,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2021-11-21 00:00:38,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 47 states have internal predecessors, (54), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-21 00:00:38,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2021-11-21 00:00:38,511 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 15 [2021-11-21 00:00:38,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:38,512 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2021-11-21 00:00:38,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:00:38,513 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2021-11-21 00:00:38,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 00:00:38,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:38,515 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:38,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:00:38,520 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:00:38,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:38,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1017119182, now seen corresponding path program 1 times [2021-11-21 00:00:38,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:38,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453941949] [2021-11-21 00:00:38,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:38,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:38,595 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 00:00:38,595 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:38,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453941949] [2021-11-21 00:00:38,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453941949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:00:38,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:00:38,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:00:38,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806608120] [2021-11-21 00:00:38,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:00:38,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:00:38,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:38,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:00:38,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:00:38,615 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:00:38,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:38,667 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2021-11-21 00:00:38,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:00:38,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-21 00:00:38,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:38,669 INFO L225 Difference]: With dead ends: 57 [2021-11-21 00:00:38,669 INFO L226 Difference]: Without dead ends: 56 [2021-11-21 00:00:38,669 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 00:00:38,671 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:38,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 105 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:00:38,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-21 00:00:38,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-21 00:00:38,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.358974358974359) internal successors, (53), 46 states have internal predecessors, (53), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-21 00:00:38,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2021-11-21 00:00:38,683 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 16 [2021-11-21 00:00:38,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:38,683 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2021-11-21 00:00:38,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:00:38,684 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2021-11-21 00:00:38,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 00:00:38,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:38,685 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:38,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:00:38,686 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:00:38,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:38,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1968008398, now seen corresponding path program 1 times [2021-11-21 00:00:38,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:38,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247844840] [2021-11-21 00:00:38,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:38,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:00:38,806 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:38,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247844840] [2021-11-21 00:00:38,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247844840] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:00:38,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006708385] [2021-11-21 00:00:38,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:38,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:38,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:00:38,832 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:00:38,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:00:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:38,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:00:38,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:00:39,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:00:39,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:00:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:00:39,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006708385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:00:39,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [295803623] [2021-11-21 00:00:39,271 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-21 00:00:39,272 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:00:39,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:00:39,285 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:00:39,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:00:41,453 INFO L197 IcfgInterpreter]: Interpreting procedure parts with input of size 14 for LOIs [2021-11-21 00:00:41,543 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:00:42,124 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:00:42,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:00:42,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-21 00:00:42,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695894900] [2021-11-21 00:00:42,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:00:42,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:00:42,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:42,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:00:42,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-11-21 00:00:42,128 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:00:42,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:42,246 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2021-11-21 00:00:42,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:00:42,247 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2021-11-21 00:00:42,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:42,249 INFO L225 Difference]: With dead ends: 104 [2021-11-21 00:00:42,250 INFO L226 Difference]: Without dead ends: 103 [2021-11-21 00:00:42,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-11-21 00:00:42,252 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 32 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:42,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 200 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:00:42,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-21 00:00:42,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 86. [2021-11-21 00:00:42,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 70 states have internal predecessors, (83), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-21 00:00:42,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 109 transitions. [2021-11-21 00:00:42,269 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 109 transitions. Word has length 21 [2021-11-21 00:00:42,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:42,270 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 109 transitions. [2021-11-21 00:00:42,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:00:42,270 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 109 transitions. [2021-11-21 00:00:42,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 00:00:42,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:42,272 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:42,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:00:42,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:42,488 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:00:42,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:42,489 INFO L85 PathProgramCache]: Analyzing trace with hash 2047050664, now seen corresponding path program 1 times [2021-11-21 00:00:42,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:42,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658013762] [2021-11-21 00:00:42,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:42,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:00:42,615 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:42,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658013762] [2021-11-21 00:00:42,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658013762] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:00:42,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186124174] [2021-11-21 00:00:42,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:42,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:42,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:00:42,617 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:00:42,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:00:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:42,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:00:42,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:00:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:00:42,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:00:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:00:42,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186124174] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:00:42,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [22101612] [2021-11-21 00:00:42,929 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-21 00:00:42,930 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:00:42,930 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:00:42,930 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:00:42,931 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:00:44,543 INFO L197 IcfgInterpreter]: Interpreting procedure parts with input of size 10 for LOIs [2021-11-21 00:00:44,645 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:00:45,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [22101612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:00:45,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:00:45,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [8, 8, 8] total 27 [2021-11-21 00:00:45,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860258956] [2021-11-21 00:00:45,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:00:45,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 00:00:45,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:45,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 00:00:45,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-11-21 00:00:45,212 INFO L87 Difference]: Start difference. First operand 86 states and 109 transitions. Second operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 13 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:00:45,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:45,820 INFO L93 Difference]: Finished difference Result 208 states and 293 transitions. [2021-11-21 00:00:45,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 00:00:45,820 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 13 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-21 00:00:45,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:45,823 INFO L225 Difference]: With dead ends: 208 [2021-11-21 00:00:45,824 INFO L226 Difference]: Without dead ends: 155 [2021-11-21 00:00:45,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-11-21 00:00:45,827 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 76 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:45,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 255 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:00:45,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-21 00:00:45,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 134. [2021-11-21 00:00:45,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 100 states have (on average 1.3) internal successors, (130), 109 states have internal predecessors, (130), 21 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (32), 21 states have call predecessors, (32), 21 states have call successors, (32) [2021-11-21 00:00:45,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 183 transitions. [2021-11-21 00:00:45,852 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 183 transitions. Word has length 24 [2021-11-21 00:00:45,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:45,853 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 183 transitions. [2021-11-21 00:00:45,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 13 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:00:45,853 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 183 transitions. [2021-11-21 00:00:45,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-21 00:00:45,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:45,855 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:45,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:00:46,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:46,084 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:00:46,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:46,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1742261082, now seen corresponding path program 1 times [2021-11-21 00:00:46,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:46,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683472033] [2021-11-21 00:00:46,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:46,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:46,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:00:46,161 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:46,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683472033] [2021-11-21 00:00:46,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683472033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:00:46,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020563706] [2021-11-21 00:00:46,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:46,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:46,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:00:46,163 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:00:46,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:00:46,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:46,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:00:46,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:00:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:00:46,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:00:46,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:00:46,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020563706] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:00:46,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1446894310] [2021-11-21 00:00:46,435 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-21 00:00:46,435 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:00:46,436 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:00:46,436 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:00:46,436 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:00:48,964 INFO L197 IcfgInterpreter]: Interpreting procedure parts with input of size 10 for LOIs [2021-11-21 00:00:49,086 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:00:49,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1446894310] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:00:49,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:00:49,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8, 8, 8] total 25 [2021-11-21 00:00:49,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143565674] [2021-11-21 00:00:49,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:00:49,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 00:00:49,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:49,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 00:00:49,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-11-21 00:00:49,589 INFO L87 Difference]: Start difference. First operand 134 states and 183 transitions. Second operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 11 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:00:49,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:49,951 INFO L93 Difference]: Finished difference Result 240 states and 340 transitions. [2021-11-21 00:00:49,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 00:00:49,952 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 11 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-11-21 00:00:49,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:49,959 INFO L225 Difference]: With dead ends: 240 [2021-11-21 00:00:49,959 INFO L226 Difference]: Without dead ends: 181 [2021-11-21 00:00:49,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-11-21 00:00:49,964 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 53 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:49,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 126 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:00:49,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-21 00:00:50,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 172. [2021-11-21 00:00:50,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 129 states have (on average 1.2945736434108528) internal successors, (167), 140 states have internal predecessors, (167), 27 states have call successors, (27), 5 states have call predecessors, (27), 9 states have return successors, (41), 26 states have call predecessors, (41), 26 states have call successors, (41) [2021-11-21 00:00:50,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 235 transitions. [2021-11-21 00:00:50,010 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 235 transitions. Word has length 29 [2021-11-21 00:00:50,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:50,011 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 235 transitions. [2021-11-21 00:00:50,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 11 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:00:50,011 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 235 transitions. [2021-11-21 00:00:50,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 00:00:50,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:50,019 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:50,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:00:50,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:50,232 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:00:50,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:50,232 INFO L85 PathProgramCache]: Analyzing trace with hash -880631691, now seen corresponding path program 1 times [2021-11-21 00:00:50,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:50,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012438733] [2021-11-21 00:00:50,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:50,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:00:50,305 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:50,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012438733] [2021-11-21 00:00:50,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012438733] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:00:50,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999405798] [2021-11-21 00:00:50,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:50,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:50,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:00:50,308 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:00:50,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:00:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:50,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:00:50,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:00:50,517 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 00:00:50,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:00:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:00:50,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999405798] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:00:50,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1312514798] [2021-11-21 00:00:50,599 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-21 00:00:50,599 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:00:50,600 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:00:50,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:00:50,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-11-21 00:00:50,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754214130] [2021-11-21 00:00:50,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:00:50,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 00:00:50,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:50,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 00:00:50,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:00:50,604 INFO L87 Difference]: Start difference. First operand 172 states and 235 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-21 00:00:50,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:50,727 INFO L93 Difference]: Finished difference Result 318 states and 434 transitions. [2021-11-21 00:00:50,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:00:50,728 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2021-11-21 00:00:50,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:50,730 INFO L225 Difference]: With dead ends: 318 [2021-11-21 00:00:50,730 INFO L226 Difference]: Without dead ends: 175 [2021-11-21 00:00:50,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:00:50,732 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 27 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:50,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 279 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:00:50,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-21 00:00:50,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2021-11-21 00:00:50,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 129 states have (on average 1.2868217054263567) internal successors, (166), 140 states have internal predecessors, (166), 27 states have call successors, (27), 5 states have call predecessors, (27), 9 states have return successors, (41), 26 states have call predecessors, (41), 26 states have call successors, (41) [2021-11-21 00:00:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 234 transitions. [2021-11-21 00:00:50,750 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 234 transitions. Word has length 41 [2021-11-21 00:00:50,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:50,766 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 234 transitions. [2021-11-21 00:00:50,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-21 00:00:50,766 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 234 transitions. [2021-11-21 00:00:50,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 00:00:50,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:50,770 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2021-11-21 00:00:50,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:00:50,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 00:00:50,986 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:00:50,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:50,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1121789355, now seen corresponding path program 2 times [2021-11-21 00:00:50,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:50,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158163504] [2021-11-21 00:00:50,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:50,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-21 00:00:51,090 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:51,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158163504] [2021-11-21 00:00:51,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158163504] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:00:51,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412205760] [2021-11-21 00:00:51,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:00:51,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:51,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:00:51,100 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:00:51,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:00:51,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 00:00:51,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:00:51,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 00:00:51,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:00:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-21 00:00:51,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:00:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-21 00:00:51,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412205760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:00:51,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1923893744] [2021-11-21 00:00:51,436 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-21 00:00:51,437 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:00:51,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:00:51,437 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:00:51,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:00:52,558 INFO L197 IcfgInterpreter]: Interpreting procedure parts with input of size 14 for LOIs [2021-11-21 00:00:52,617 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:00:52,997 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:00:52,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:00:52,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2021-11-21 00:00:52,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675884545] [2021-11-21 00:00:52,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:00:52,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-21 00:00:52,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:52,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-21 00:00:53,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 00:00:53,000 INFO L87 Difference]: Start difference. First operand 172 states and 234 transitions. Second operand has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 00:00:53,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:53,233 INFO L93 Difference]: Finished difference Result 320 states and 453 transitions. [2021-11-21 00:00:53,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-21 00:00:53,233 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 48 [2021-11-21 00:00:53,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:53,241 INFO L225 Difference]: With dead ends: 320 [2021-11-21 00:00:53,241 INFO L226 Difference]: Without dead ends: 319 [2021-11-21 00:00:53,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=360, Invalid=1532, Unknown=0, NotChecked=0, Total=1892 [2021-11-21 00:00:53,247 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 141 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:53,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 156 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:00:53,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-21 00:00:53,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 262. [2021-11-21 00:00:53,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 201 states have (on average 1.2736318407960199) internal successors, (256), 212 states have internal predecessors, (256), 45 states have call successors, (45), 5 states have call predecessors, (45), 9 states have return successors, (77), 44 states have call predecessors, (77), 44 states have call successors, (77) [2021-11-21 00:00:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 378 transitions. [2021-11-21 00:00:53,281 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 378 transitions. Word has length 48 [2021-11-21 00:00:53,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:53,281 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 378 transitions. [2021-11-21 00:00:53,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 00:00:53,282 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 378 transitions. [2021-11-21 00:00:53,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-21 00:00:53,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:53,283 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:53,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:00:53,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 00:00:53,512 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:00:53,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:53,512 INFO L85 PathProgramCache]: Analyzing trace with hash 2043944028, now seen corresponding path program 2 times [2021-11-21 00:00:53,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:53,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850044980] [2021-11-21 00:00:53,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:53,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:53,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 00:00:53,622 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:53,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850044980] [2021-11-21 00:00:53,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850044980] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:00:53,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820728288] [2021-11-21 00:00:53,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:00:53,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:53,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:00:53,624 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:00:53,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:00:53,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 00:00:53,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:00:53,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:00:53,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:00:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 00:00:53,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:00:54,056 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 00:00:54,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820728288] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:00:54,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1434698522] [2021-11-21 00:00:54,058 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-21 00:00:54,058 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:00:54,059 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:00:54,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:00:54,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2021-11-21 00:00:54,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942882592] [2021-11-21 00:00:54,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:00:54,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-21 00:00:54,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:54,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-21 00:00:54,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-11-21 00:00:54,061 INFO L87 Difference]: Start difference. First operand 262 states and 378 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 20 states have internal predecessors, (86), 9 states have call successors, (12), 7 states have call predecessors, (12), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 00:00:54,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:54,607 INFO L93 Difference]: Finished difference Result 652 states and 1002 transitions. [2021-11-21 00:00:54,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-21 00:00:54,607 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 20 states have internal predecessors, (86), 9 states have call successors, (12), 7 states have call predecessors, (12), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2021-11-21 00:00:54,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:54,613 INFO L225 Difference]: With dead ends: 652 [2021-11-21 00:00:54,613 INFO L226 Difference]: Without dead ends: 527 [2021-11-21 00:00:54,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2021-11-21 00:00:54,617 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 336 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:54,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 214 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:00:54,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-11-21 00:00:54,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 483. [2021-11-21 00:00:54,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 374 states have (on average 1.2754010695187166) internal successors, (477), 389 states have internal predecessors, (477), 84 states have call successors, (84), 13 states have call predecessors, (84), 20 states have return successors, (146), 80 states have call predecessors, (146), 81 states have call successors, (146) [2021-11-21 00:00:54,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 707 transitions. [2021-11-21 00:00:54,693 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 707 transitions. Word has length 50 [2021-11-21 00:00:54,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:54,694 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 707 transitions. [2021-11-21 00:00:54,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 20 states have internal predecessors, (86), 9 states have call successors, (12), 7 states have call predecessors, (12), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 00:00:54,694 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 707 transitions. [2021-11-21 00:00:54,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-21 00:00:54,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:54,697 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:54,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:00:54,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:54,915 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting partsErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:00:54,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:54,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1099519297, now seen corresponding path program 1 times [2021-11-21 00:00:54,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:54,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678376258] [2021-11-21 00:00:54,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:54,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:00:54,958 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:54,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678376258] [2021-11-21 00:00:54,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678376258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:00:54,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797017171] [2021-11-21 00:00:54,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:54,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:54,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:00:54,965 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:00:54,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:00:55,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:55,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:00:55,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:00:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 00:00:55,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:00:55,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797017171] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:00:55,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:00:55,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-21 00:00:55,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907782019] [2021-11-21 00:00:55,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:00:55,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:00:55,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:55,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:00:55,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:00:55,105 INFO L87 Difference]: Start difference. First operand 483 states and 707 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:00:55,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:55,188 INFO L93 Difference]: Finished difference Result 823 states and 1189 transitions. [2021-11-21 00:00:55,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:00:55,189 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2021-11-21 00:00:55,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:55,194 INFO L225 Difference]: With dead ends: 823 [2021-11-21 00:00:55,194 INFO L226 Difference]: Without dead ends: 516 [2021-11-21 00:00:55,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:00:55,197 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 11 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:55,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 139 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:00:55,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-21 00:00:55,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 506. [2021-11-21 00:00:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 391 states have (on average 1.2710997442455243) internal successors, (497), 408 states have internal predecessors, (497), 84 states have call successors, (84), 17 states have call predecessors, (84), 26 states have return successors, (143), 80 states have call predecessors, (143), 81 states have call successors, (143) [2021-11-21 00:00:55,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 724 transitions. [2021-11-21 00:00:55,240 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 724 transitions. Word has length 50 [2021-11-21 00:00:55,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:55,241 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 724 transitions. [2021-11-21 00:00:55,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:00:55,241 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 724 transitions. [2021-11-21 00:00:55,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-21 00:00:55,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:55,244 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:55,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-21 00:00:55,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 00:00:55,472 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting partsErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:00:55,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:55,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1071694514, now seen corresponding path program 2 times [2021-11-21 00:00:55,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:55,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065819813] [2021-11-21 00:00:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:55,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 00:00:55,546 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:55,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065819813] [2021-11-21 00:00:55,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065819813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:00:55,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755995613] [2021-11-21 00:00:55,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:00:55,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:55,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:00:55,558 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:00:55,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:00:55,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 00:00:55,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:00:55,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:00:55,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:00:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-21 00:00:55,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:00:55,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755995613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:00:55,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:00:55,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-11-21 00:00:55,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990857594] [2021-11-21 00:00:55,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:00:55,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:00:55,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:55,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:00:55,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:00:55,701 INFO L87 Difference]: Start difference. First operand 506 states and 724 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:00:55,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:55,769 INFO L93 Difference]: Finished difference Result 538 states and 790 transitions. [2021-11-21 00:00:55,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:00:55,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2021-11-21 00:00:55,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:55,774 INFO L225 Difference]: With dead ends: 538 [2021-11-21 00:00:55,775 INFO L226 Difference]: Without dead ends: 537 [2021-11-21 00:00:55,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:00:55,776 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:55,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 135 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:00:55,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-21 00:00:55,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 522. [2021-11-21 00:00:55,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 404 states have (on average 1.254950495049505) internal successors, (507), 419 states have internal predecessors, (507), 84 states have call successors, (84), 17 states have call predecessors, (84), 29 states have return successors, (154), 85 states have call predecessors, (154), 81 states have call successors, (154) [2021-11-21 00:00:55,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 745 transitions. [2021-11-21 00:00:55,818 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 745 transitions. Word has length 59 [2021-11-21 00:00:55,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:55,820 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 745 transitions. [2021-11-21 00:00:55,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:00:55,820 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 745 transitions. [2021-11-21 00:00:55,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-21 00:00:55,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:55,822 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:55,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:00:56,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 00:00:56,042 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting partsErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:00:56,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:56,042 INFO L85 PathProgramCache]: Analyzing trace with hash 995031038, now seen corresponding path program 3 times [2021-11-21 00:00:56,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:56,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234058100] [2021-11-21 00:00:56,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:56,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-21 00:00:56,126 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:56,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234058100] [2021-11-21 00:00:56,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234058100] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:00:56,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:00:56,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:00:56,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7639468] [2021-11-21 00:00:56,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:00:56,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:00:56,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:56,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:00:56,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:00:56,128 INFO L87 Difference]: Start difference. First operand 522 states and 745 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:00:56,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:56,187 INFO L93 Difference]: Finished difference Result 574 states and 828 transitions. [2021-11-21 00:00:56,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:00:56,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2021-11-21 00:00:56,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:56,192 INFO L225 Difference]: With dead ends: 574 [2021-11-21 00:00:56,192 INFO L226 Difference]: Without dead ends: 573 [2021-11-21 00:00:56,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:00:56,194 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:56,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 126 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:00:56,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-11-21 00:00:56,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 538. [2021-11-21 00:00:56,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 415 states have (on average 1.2530120481927711) internal successors, (520), 432 states have internal predecessors, (520), 87 states have call successors, (87), 17 states have call predecessors, (87), 31 states have return successors, (171), 88 states have call predecessors, (171), 84 states have call successors, (171) [2021-11-21 00:00:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 778 transitions. [2021-11-21 00:00:56,242 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 778 transitions. Word has length 59 [2021-11-21 00:00:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:56,242 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 778 transitions. [2021-11-21 00:00:56,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:00:56,243 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 778 transitions. [2021-11-21 00:00:56,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-21 00:00:56,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:56,245 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:56,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 00:00:56,245 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:00:56,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:56,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1793618688, now seen corresponding path program 1 times [2021-11-21 00:00:56,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:56,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441701120] [2021-11-21 00:00:56,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:56,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:56,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-11-21 00:00:56,276 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:56,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441701120] [2021-11-21 00:00:56,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441701120] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:00:56,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:00:56,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:00:56,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449852714] [2021-11-21 00:00:56,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:00:56,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:00:56,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:56,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:00:56,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:00:56,279 INFO L87 Difference]: Start difference. First operand 538 states and 778 transitions. Second operand has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:00:56,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:56,318 INFO L93 Difference]: Finished difference Result 552 states and 843 transitions. [2021-11-21 00:00:56,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:00:56,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 64 [2021-11-21 00:00:56,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:56,324 INFO L225 Difference]: With dead ends: 552 [2021-11-21 00:00:56,324 INFO L226 Difference]: Without dead ends: 551 [2021-11-21 00:00:56,325 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 00:00:56,325 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:56,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 56 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:00:56,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-11-21 00:00:56,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 537. [2021-11-21 00:00:56,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 415 states have (on average 1.2457831325301205) internal successors, (517), 431 states have internal predecessors, (517), 87 states have call successors, (87), 17 states have call predecessors, (87), 31 states have return successors, (171), 88 states have call predecessors, (171), 84 states have call successors, (171) [2021-11-21 00:00:56,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 775 transitions. [2021-11-21 00:00:56,374 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 775 transitions. Word has length 64 [2021-11-21 00:00:56,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:56,374 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 775 transitions. [2021-11-21 00:00:56,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:00:56,375 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 775 transitions. [2021-11-21 00:00:56,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-21 00:00:56,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:56,377 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:56,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 00:00:56,378 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting partsErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:00:56,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:56,378 INFO L85 PathProgramCache]: Analyzing trace with hash -482217523, now seen corresponding path program 1 times [2021-11-21 00:00:56,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:56,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780075364] [2021-11-21 00:00:56,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:56,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 37 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-21 00:00:56,428 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:56,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780075364] [2021-11-21 00:00:56,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780075364] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:00:56,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525000209] [2021-11-21 00:00:56,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:56,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:56,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:00:56,430 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:00:56,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:00:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:56,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:00:56,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:00:56,603 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-21 00:00:56,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:00:56,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525000209] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:00:56,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:00:56,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 7 [2021-11-21 00:00:56,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389772021] [2021-11-21 00:00:56,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:00:56,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:00:56,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:56,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:00:56,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:00:56,605 INFO L87 Difference]: Start difference. First operand 537 states and 775 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-21 00:00:56,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:56,735 INFO L93 Difference]: Finished difference Result 831 states and 1243 transitions. [2021-11-21 00:00:56,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:00:56,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 65 [2021-11-21 00:00:56,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:56,739 INFO L225 Difference]: With dead ends: 831 [2021-11-21 00:00:56,739 INFO L226 Difference]: Without dead ends: 363 [2021-11-21 00:00:56,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:00:56,743 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 41 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:56,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 109 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:00:56,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-11-21 00:00:56,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 347. [2021-11-21 00:00:56,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 272 states have (on average 1.2389705882352942) internal successors, (337), 272 states have internal predecessors, (337), 51 states have call successors, (51), 10 states have call predecessors, (51), 20 states have return successors, (107), 64 states have call predecessors, (107), 51 states have call successors, (107) [2021-11-21 00:00:56,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 495 transitions. [2021-11-21 00:00:56,775 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 495 transitions. Word has length 65 [2021-11-21 00:00:56,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:56,775 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 495 transitions. [2021-11-21 00:00:56,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-21 00:00:56,776 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 495 transitions. [2021-11-21 00:00:56,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-21 00:00:56,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:56,777 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:56,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:00:56,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-21 00:00:56,998 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting partsErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:00:56,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:56,998 INFO L85 PathProgramCache]: Analyzing trace with hash 781191166, now seen corresponding path program 1 times [2021-11-21 00:00:56,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:56,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779627485] [2021-11-21 00:00:56,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:56,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:57,036 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-21 00:00:57,036 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:57,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779627485] [2021-11-21 00:00:57,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779627485] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:00:57,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:00:57,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:00:57,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793037195] [2021-11-21 00:00:57,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:00:57,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:00:57,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:57,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:00:57,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:00:57,039 INFO L87 Difference]: Start difference. First operand 347 states and 495 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:00:57,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:57,104 INFO L93 Difference]: Finished difference Result 495 states and 741 transitions. [2021-11-21 00:00:57,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:00:57,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2021-11-21 00:00:57,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:57,108 INFO L225 Difference]: With dead ends: 495 [2021-11-21 00:00:57,108 INFO L226 Difference]: Without dead ends: 322 [2021-11-21 00:00:57,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:00:57,111 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 30 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:57,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 70 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:00:57,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-21 00:00:57,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 310. [2021-11-21 00:00:57,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 242 states have (on average 1.2314049586776858) internal successors, (298), 246 states have internal predecessors, (298), 48 states have call successors, (48), 10 states have call predecessors, (48), 16 states have return successors, (82), 53 states have call predecessors, (82), 48 states have call successors, (82) [2021-11-21 00:00:57,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 428 transitions. [2021-11-21 00:00:57,142 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 428 transitions. Word has length 60 [2021-11-21 00:00:57,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:57,142 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 428 transitions. [2021-11-21 00:00:57,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:00:57,143 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 428 transitions. [2021-11-21 00:00:57,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 00:00:57,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:57,144 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:57,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-21 00:00:57,144 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting partsErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:00:57,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:57,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1374868885, now seen corresponding path program 2 times [2021-11-21 00:00:57,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:57,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131735139] [2021-11-21 00:00:57,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:57,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 34 proven. 12 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-21 00:00:57,223 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:57,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131735139] [2021-11-21 00:00:57,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131735139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:00:57,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731366810] [2021-11-21 00:00:57,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:00:57,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:57,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:00:57,228 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:00:57,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 00:00:57,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 00:00:57,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:00:57,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:00:57,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:00:57,437 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-21 00:00:57,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:00:57,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731366810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:00:57,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:00:57,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2021-11-21 00:00:57,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538126375] [2021-11-21 00:00:57,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:00:57,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:00:57,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:57,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:00:57,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:00:57,439 INFO L87 Difference]: Start difference. First operand 310 states and 428 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:00:57,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:57,487 INFO L93 Difference]: Finished difference Result 319 states and 441 transitions. [2021-11-21 00:00:57,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:00:57,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2021-11-21 00:00:57,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:57,491 INFO L225 Difference]: With dead ends: 319 [2021-11-21 00:00:57,491 INFO L226 Difference]: Without dead ends: 318 [2021-11-21 00:00:57,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:00:57,492 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:57,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 115 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:00:57,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-21 00:00:57,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 315. [2021-11-21 00:00:57,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 247 states have (on average 1.2267206477732793) internal successors, (303), 251 states have internal predecessors, (303), 48 states have call successors, (48), 10 states have call predecessors, (48), 16 states have return successors, (82), 53 states have call predecessors, (82), 48 states have call successors, (82) [2021-11-21 00:00:57,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 433 transitions. [2021-11-21 00:00:57,523 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 433 transitions. Word has length 66 [2021-11-21 00:00:57,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:57,524 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 433 transitions. [2021-11-21 00:00:57,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:00:57,524 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 433 transitions. [2021-11-21 00:00:57,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-21 00:00:57,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:57,526 INFO L514 BasicCegarLoop]: trace histogram [8, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:57,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:00:57,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:57,732 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:00:57,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:57,732 INFO L85 PathProgramCache]: Analyzing trace with hash 2005155257, now seen corresponding path program 1 times [2021-11-21 00:00:57,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:57,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626281845] [2021-11-21 00:00:57,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:57,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 57 proven. 10 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-21 00:00:57,803 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:57,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626281845] [2021-11-21 00:00:57,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626281845] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:00:57,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587861698] [2021-11-21 00:00:57,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:57,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:57,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:00:57,805 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:00:57,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 00:00:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:57,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:00:57,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:00:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 77 proven. 4 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 00:00:58,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:00:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 57 proven. 10 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-21 00:00:58,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587861698] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:00:58,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [540390137] [2021-11-21 00:00:58,140 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-21 00:00:58,141 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:00:58,141 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:00:58,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:00:58,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2021-11-21 00:00:58,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395261367] [2021-11-21 00:00:58,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:00:58,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:00:58,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:58,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:00:58,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:00:58,145 INFO L87 Difference]: Start difference. First operand 315 states and 433 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-21 00:00:58,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:58,329 INFO L93 Difference]: Finished difference Result 639 states and 873 transitions. [2021-11-21 00:00:58,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:00:58,330 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 71 [2021-11-21 00:00:58,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:58,334 INFO L225 Difference]: With dead ends: 639 [2021-11-21 00:00:58,334 INFO L226 Difference]: Without dead ends: 403 [2021-11-21 00:00:58,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:00:58,338 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 48 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:58,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 185 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:00:58,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-11-21 00:00:58,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 392. [2021-11-21 00:00:58,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 307 states have (on average 1.205211726384365) internal successors, (370), 311 states have internal predecessors, (370), 57 states have call successors, (57), 18 states have call predecessors, (57), 24 states have return successors, (90), 62 states have call predecessors, (90), 57 states have call successors, (90) [2021-11-21 00:00:58,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 517 transitions. [2021-11-21 00:00:58,373 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 517 transitions. Word has length 71 [2021-11-21 00:00:58,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:58,373 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 517 transitions. [2021-11-21 00:00:58,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-21 00:00:58,374 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 517 transitions. [2021-11-21 00:00:58,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-21 00:00:58,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:58,376 INFO L514 BasicCegarLoop]: trace histogram [10, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:58,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:00:58,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:58,589 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:00:58,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:58,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1721141657, now seen corresponding path program 2 times [2021-11-21 00:00:58,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:58,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201858500] [2021-11-21 00:00:58,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:58,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 71 proven. 18 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-21 00:00:58,655 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:58,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201858500] [2021-11-21 00:00:58,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201858500] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:00:58,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027827759] [2021-11-21 00:00:58,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:00:58,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:58,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:00:58,658 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:00:58,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 00:00:58,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 00:00:58,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:00:58,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 00:00:58,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:00:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-21 00:00:59,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:00:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 56 proven. 34 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-21 00:00:59,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027827759] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:00:59,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [688097310] [2021-11-21 00:00:59,281 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-21 00:00:59,281 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:00:59,281 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:00:59,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:00:59,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 20 [2021-11-21 00:00:59,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313045171] [2021-11-21 00:00:59,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:00:59,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 00:00:59,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:59,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 00:00:59,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-11-21 00:00:59,284 INFO L87 Difference]: Start difference. First operand 392 states and 517 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 17 states have internal predecessors, (66), 9 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-21 00:00:59,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:59,784 INFO L93 Difference]: Finished difference Result 746 states and 1041 transitions. [2021-11-21 00:00:59,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 00:00:59,785 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 17 states have internal predecessors, (66), 9 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 81 [2021-11-21 00:00:59,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:59,789 INFO L225 Difference]: With dead ends: 746 [2021-11-21 00:00:59,789 INFO L226 Difference]: Without dead ends: 456 [2021-11-21 00:00:59,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 00:00:59,793 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 181 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:59,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 292 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:00:59,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-11-21 00:00:59,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 433. [2021-11-21 00:00:59,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 347 states have (on average 1.1902017291066282) internal successors, (413), 345 states have internal predecessors, (413), 58 states have call successors, (58), 21 states have call predecessors, (58), 24 states have return successors, (67), 66 states have call predecessors, (67), 58 states have call successors, (67) [2021-11-21 00:00:59,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 538 transitions. [2021-11-21 00:00:59,826 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 538 transitions. Word has length 81 [2021-11-21 00:00:59,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:59,826 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 538 transitions. [2021-11-21 00:00:59,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 17 states have internal predecessors, (66), 9 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-21 00:00:59,827 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 538 transitions. [2021-11-21 00:00:59,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-21 00:00:59,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:59,829 INFO L514 BasicCegarLoop]: trace histogram [9, 6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:59,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-21 00:01:00,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:00,048 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:01:00,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:00,048 INFO L85 PathProgramCache]: Analyzing trace with hash -244126734, now seen corresponding path program 3 times [2021-11-21 00:01:00,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:00,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798787553] [2021-11-21 00:01:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:00,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 78 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-21 00:01:00,113 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:00,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798787553] [2021-11-21 00:01:00,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798787553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:01:00,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225981325] [2021-11-21 00:01:00,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:01:00,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:00,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:00,115 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:00,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 00:01:00,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:01:00,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:01:00,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 00:01:00,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 55 proven. 6 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-21 00:01:00,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:01:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 55 proven. 6 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-21 00:01:00,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225981325] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:01:00,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [130564389] [2021-11-21 00:01:00,596 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-21 00:01:00,596 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:01:00,597 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:01:00,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:01:00,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 14 [2021-11-21 00:01:00,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278778077] [2021-11-21 00:01:00,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:01:00,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 00:01:00,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:00,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 00:01:00,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:01:00,600 INFO L87 Difference]: Start difference. First operand 433 states and 538 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 12 states have internal predecessors, (63), 6 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 00:01:01,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:01,243 INFO L93 Difference]: Finished difference Result 890 states and 1212 transitions. [2021-11-21 00:01:01,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 00:01:01,249 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 12 states have internal predecessors, (63), 6 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 81 [2021-11-21 00:01:01,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:01,254 INFO L225 Difference]: With dead ends: 890 [2021-11-21 00:01:01,254 INFO L226 Difference]: Without dead ends: 530 [2021-11-21 00:01:01,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-11-21 00:01:01,259 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 142 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:01,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 365 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:01:01,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-21 00:01:01,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 464. [2021-11-21 00:01:01,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 372 states have (on average 1.1720430107526882) internal successors, (436), 368 states have internal predecessors, (436), 61 states have call successors, (61), 22 states have call predecessors, (61), 27 states have return successors, (80), 73 states have call predecessors, (80), 61 states have call successors, (80) [2021-11-21 00:01:01,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 577 transitions. [2021-11-21 00:01:01,304 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 577 transitions. Word has length 81 [2021-11-21 00:01:01,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:01,305 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 577 transitions. [2021-11-21 00:01:01,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 12 states have internal predecessors, (63), 6 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 00:01:01,306 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 577 transitions. [2021-11-21 00:01:01,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-21 00:01:01,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:01,308 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2021-11-21 00:01:01,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-21 00:01:01,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:01,528 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:01:01,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:01,528 INFO L85 PathProgramCache]: Analyzing trace with hash -530132299, now seen corresponding path program 3 times [2021-11-21 00:01:01,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:01,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478871127] [2021-11-21 00:01:01,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:01,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-21 00:01:01,912 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:01,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478871127] [2021-11-21 00:01:01,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478871127] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:01:01,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450746775] [2021-11-21 00:01:01,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:01:01,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:01,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:01,952 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:01,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 00:01:02,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:01:02,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:01:02,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 00:01:02,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-21 00:01:02,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:01:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-21 00:01:03,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450746775] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:01:03,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1063474183] [2021-11-21 00:01:03,022 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-21 00:01:03,022 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:01:03,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:01:03,023 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:01:03,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:01:04,325 INFO L197 IcfgInterpreter]: Interpreting procedure parts with input of size 14 for LOIs [2021-11-21 00:01:04,377 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:01:04,875 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:01:04,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:01:04,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2021-11-21 00:01:04,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623512307] [2021-11-21 00:01:04,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:01:04,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-21 00:01:04,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:04,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-21 00:01:04,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=2701, Unknown=0, NotChecked=0, Total=3306 [2021-11-21 00:01:04,879 INFO L87 Difference]: Start difference. First operand 464 states and 577 transitions. Second operand has 46 states, 45 states have (on average 2.088888888888889) internal successors, (94), 46 states have internal predecessors, (94), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-21 00:01:05,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:05,692 INFO L93 Difference]: Finished difference Result 771 states and 991 transitions. [2021-11-21 00:01:05,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-21 00:01:05,693 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.088888888888889) internal successors, (94), 46 states have internal predecessors, (94), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 102 [2021-11-21 00:01:05,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:05,700 INFO L225 Difference]: With dead ends: 771 [2021-11-21 00:01:05,700 INFO L226 Difference]: Without dead ends: 770 [2021-11-21 00:01:05,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1386, Invalid=4934, Unknown=0, NotChecked=0, Total=6320 [2021-11-21 00:01:05,704 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 265 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:05,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 586 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:01:05,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2021-11-21 00:01:05,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 644. [2021-11-21 00:01:05,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 516 states have (on average 1.193798449612403) internal successors, (616), 512 states have internal predecessors, (616), 97 states have call successors, (97), 22 states have call predecessors, (97), 27 states have return successors, (116), 109 states have call predecessors, (116), 97 states have call successors, (116) [2021-11-21 00:01:05,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 829 transitions. [2021-11-21 00:01:05,783 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 829 transitions. Word has length 102 [2021-11-21 00:01:05,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:05,784 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 829 transitions. [2021-11-21 00:01:05,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.088888888888889) internal successors, (94), 46 states have internal predecessors, (94), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-21 00:01:05,785 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 829 transitions. [2021-11-21 00:01:05,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-21 00:01:05,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:05,787 INFO L514 BasicCegarLoop]: trace histogram [11, 8, 7, 6, 6, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:05,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-21 00:01:06,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-21 00:01:06,016 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:01:06,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:06,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1265533884, now seen corresponding path program 1 times [2021-11-21 00:01:06,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:06,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445295846] [2021-11-21 00:01:06,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:06,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:06,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 113 proven. 27 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-21 00:01:06,098 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:06,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445295846] [2021-11-21 00:01:06,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445295846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:01:06,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072885789] [2021-11-21 00:01:06,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:06,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:06,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:06,101 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:06,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-21 00:01:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:06,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:01:06,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:06,434 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 138 proven. 15 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-21 00:01:06,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:01:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 113 proven. 27 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-21 00:01:06,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072885789] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:01:06,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1771886847] [2021-11-21 00:01:06,728 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-21 00:01:06,728 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:01:06,730 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:01:06,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:01:06,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2021-11-21 00:01:06,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723107332] [2021-11-21 00:01:06,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:01:06,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:01:06,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:06,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:01:06,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:01:06,735 INFO L87 Difference]: Start difference. First operand 644 states and 829 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-21 00:01:06,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:06,945 INFO L93 Difference]: Finished difference Result 968 states and 1250 transitions. [2021-11-21 00:01:06,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 00:01:06,946 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 107 [2021-11-21 00:01:06,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:06,951 INFO L225 Difference]: With dead ends: 968 [2021-11-21 00:01:06,952 INFO L226 Difference]: Without dead ends: 644 [2021-11-21 00:01:06,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2021-11-21 00:01:06,956 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:06,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 371 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:01:06,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-11-21 00:01:07,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 644. [2021-11-21 00:01:07,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 516 states have (on average 1.189922480620155) internal successors, (614), 512 states have internal predecessors, (614), 97 states have call successors, (97), 22 states have call predecessors, (97), 27 states have return successors, (116), 109 states have call predecessors, (116), 97 states have call successors, (116) [2021-11-21 00:01:07,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 827 transitions. [2021-11-21 00:01:07,014 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 827 transitions. Word has length 107 [2021-11-21 00:01:07,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:07,014 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 827 transitions. [2021-11-21 00:01:07,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-21 00:01:07,015 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 827 transitions. [2021-11-21 00:01:07,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-21 00:01:07,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:07,018 INFO L514 BasicCegarLoop]: trace histogram [14, 11, 9, 7, 7, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:07,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-21 00:01:07,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-21 00:01:07,233 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:01:07,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:07,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1234426272, now seen corresponding path program 2 times [2021-11-21 00:01:07,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:07,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436065831] [2021-11-21 00:01:07,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:07,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 157 proven. 40 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2021-11-21 00:01:07,371 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:07,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436065831] [2021-11-21 00:01:07,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436065831] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:01:07,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798351824] [2021-11-21 00:01:07,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:01:07,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:07,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:07,373 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:07,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 00:01:07,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:01:07,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:01:07,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:01:07,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 51 proven. 4 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2021-11-21 00:01:07,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:01:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 51 proven. 4 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2021-11-21 00:01:08,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798351824] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:01:08,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [173706625] [2021-11-21 00:01:08,018 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-21 00:01:08,018 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:01:08,019 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:01:08,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:01:08,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 20 [2021-11-21 00:01:08,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295291172] [2021-11-21 00:01:08,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:01:08,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 00:01:08,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:08,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 00:01:08,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-11-21 00:01:08,023 INFO L87 Difference]: Start difference. First operand 644 states and 827 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 18 states have internal predecessors, (82), 9 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-21 00:01:08,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:08,567 INFO L93 Difference]: Finished difference Result 1106 states and 1501 transitions. [2021-11-21 00:01:08,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 00:01:08,567 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 18 states have internal predecessors, (82), 9 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 137 [2021-11-21 00:01:08,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:08,574 INFO L225 Difference]: With dead ends: 1106 [2021-11-21 00:01:08,574 INFO L226 Difference]: Without dead ends: 779 [2021-11-21 00:01:08,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 00:01:08,578 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 153 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:08,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 491 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:01:08,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-11-21 00:01:08,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 761. [2021-11-21 00:01:08,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 610 states have (on average 1.1540983606557378) internal successors, (704), 606 states have internal predecessors, (704), 120 states have call successors, (120), 22 states have call predecessors, (120), 27 states have return successors, (139), 132 states have call predecessors, (139), 120 states have call successors, (139) [2021-11-21 00:01:08,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 963 transitions. [2021-11-21 00:01:08,637 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 963 transitions. Word has length 137 [2021-11-21 00:01:08,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:08,638 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 963 transitions. [2021-11-21 00:01:08,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 18 states have internal predecessors, (82), 9 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-21 00:01:08,638 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 963 transitions. [2021-11-21 00:01:08,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-21 00:01:08,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:08,643 INFO L514 BasicCegarLoop]: trace histogram [15, 13, 9, 8, 8, 7, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-21 00:01:08,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-21 00:01:08,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:08,856 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:01:08,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:08,856 INFO L85 PathProgramCache]: Analyzing trace with hash 595740085, now seen corresponding path program 1 times [2021-11-21 00:01:08,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:08,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118967558] [2021-11-21 00:01:08,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:08,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 164 proven. 62 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-11-21 00:01:08,994 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:08,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118967558] [2021-11-21 00:01:08,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118967558] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:01:08,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492470894] [2021-11-21 00:01:08,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:08,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:08,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:08,996 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:09,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-21 00:01:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:09,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 00:01:09,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:09,410 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 328 proven. 43 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-21 00:01:09,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:01:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 164 proven. 62 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-11-21 00:01:09,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492470894] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:01:09,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1241790402] [2021-11-21 00:01:09,651 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-11-21 00:01:09,651 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:01:09,652 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:01:09,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:01:09,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2021-11-21 00:01:09,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29935671] [2021-11-21 00:01:09,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:01:09,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 00:01:09,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:09,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 00:01:09,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-21 00:01:09,656 INFO L87 Difference]: Start difference. First operand 761 states and 963 transitions. Second operand has 18 states, 18 states have (on average 4.277777777777778) internal successors, (77), 18 states have internal predecessors, (77), 9 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2021-11-21 00:01:09,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:09,956 INFO L93 Difference]: Finished difference Result 1085 states and 1378 transitions. [2021-11-21 00:01:09,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-21 00:01:09,957 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.277777777777778) internal successors, (77), 18 states have internal predecessors, (77), 9 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) Word has length 150 [2021-11-21 00:01:09,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:09,963 INFO L225 Difference]: With dead ends: 1085 [2021-11-21 00:01:09,963 INFO L226 Difference]: Without dead ends: 761 [2021-11-21 00:01:09,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2021-11-21 00:01:09,967 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 36 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:09,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 340 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:01:09,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-11-21 00:01:10,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 761. [2021-11-21 00:01:10,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 610 states have (on average 1.1508196721311474) internal successors, (702), 606 states have internal predecessors, (702), 120 states have call successors, (120), 22 states have call predecessors, (120), 27 states have return successors, (139), 132 states have call predecessors, (139), 120 states have call successors, (139) [2021-11-21 00:01:10,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 961 transitions. [2021-11-21 00:01:10,022 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 961 transitions. Word has length 150 [2021-11-21 00:01:10,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:10,023 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 961 transitions. [2021-11-21 00:01:10,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.277777777777778) internal successors, (77), 18 states have internal predecessors, (77), 9 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2021-11-21 00:01:10,024 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 961 transitions. [2021-11-21 00:01:10,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-21 00:01:10,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:10,029 INFO L514 BasicCegarLoop]: trace histogram [18, 16, 11, 9, 9, 8, 8, 8, 8, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2021-11-21 00:01:10,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-21 00:01:10,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-21 00:01:10,244 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:01:10,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:10,244 INFO L85 PathProgramCache]: Analyzing trace with hash -487803815, now seen corresponding path program 2 times [2021-11-21 00:01:10,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:10,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821381684] [2021-11-21 00:01:10,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:10,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:10,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 244 proven. 117 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2021-11-21 00:01:10,479 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:10,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821381684] [2021-11-21 00:01:10,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821381684] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:01:10,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967146452] [2021-11-21 00:01:10,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:01:10,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:10,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:10,483 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:10,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-21 00:01:10,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 00:01:10,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:01:10,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:01:10,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 797 trivial. 0 not checked. [2021-11-21 00:01:10,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:01:10,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967146452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:01:10,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:01:10,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [16] total 19 [2021-11-21 00:01:10,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797798893] [2021-11-21 00:01:10,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:01:10,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:01:10,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:10,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:01:10,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:01:10,855 INFO L87 Difference]: Start difference. First operand 761 states and 961 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 00:01:10,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:10,964 INFO L93 Difference]: Finished difference Result 1109 states and 1453 transitions. [2021-11-21 00:01:10,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:01:10,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 180 [2021-11-21 00:01:10,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:10,971 INFO L225 Difference]: With dead ends: 1109 [2021-11-21 00:01:10,971 INFO L226 Difference]: Without dead ends: 781 [2021-11-21 00:01:10,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-11-21 00:01:10,977 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:10,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 79 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:01:10,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-11-21 00:01:11,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 766. [2021-11-21 00:01:11,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 613 states have (on average 1.1419249592169658) internal successors, (700), 610 states have internal predecessors, (700), 122 states have call successors, (122), 24 states have call predecessors, (122), 27 states have return successors, (138), 131 states have call predecessors, (138), 122 states have call successors, (138) [2021-11-21 00:01:11,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 960 transitions. [2021-11-21 00:01:11,037 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 960 transitions. Word has length 180 [2021-11-21 00:01:11,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:11,038 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 960 transitions. [2021-11-21 00:01:11,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 00:01:11,039 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 960 transitions. [2021-11-21 00:01:11,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-21 00:01:11,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:11,045 INFO L514 BasicCegarLoop]: trace histogram [21, 18, 13, 9, 9, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:11,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-21 00:01:11,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-21 00:01:11,259 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:01:11,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:11,259 INFO L85 PathProgramCache]: Analyzing trace with hash -320503359, now seen corresponding path program 3 times [2021-11-21 00:01:11,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:11,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892119646] [2021-11-21 00:01:11,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:11,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:11,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1118 backedges. 285 proven. 168 refuted. 0 times theorem prover too weak. 665 trivial. 0 not checked. [2021-11-21 00:01:11,488 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:11,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892119646] [2021-11-21 00:01:11,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892119646] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:01:11,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112614076] [2021-11-21 00:01:11,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:01:11,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:11,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:11,490 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:11,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-21 00:01:11,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:01:11,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:01:11,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 00:01:11,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:12,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1118 backedges. 575 proven. 53 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-21 00:01:12,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:01:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1118 backedges. 315 proven. 133 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked. [2021-11-21 00:01:12,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112614076] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:01:12,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1805405617] [2021-11-21 00:01:12,790 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-21 00:01:12,790 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:01:12,790 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:01:12,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:01:12,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 14] total 31 [2021-11-21 00:01:12,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845724708] [2021-11-21 00:01:12,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:01:12,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-21 00:01:12,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:12,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-21 00:01:12,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2021-11-21 00:01:12,796 INFO L87 Difference]: Start difference. First operand 766 states and 960 transitions. Second operand has 31 states, 31 states have (on average 4.580645161290323) internal successors, (142), 29 states have internal predecessors, (142), 14 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (20), 13 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-21 00:01:15,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:15,358 INFO L93 Difference]: Finished difference Result 1757 states and 2632 transitions. [2021-11-21 00:01:15,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-21 00:01:15,358 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.580645161290323) internal successors, (142), 29 states have internal predecessors, (142), 14 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (20), 13 states have call predecessors, (20), 12 states have call successors, (20) Word has length 205 [2021-11-21 00:01:15,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:15,374 INFO L225 Difference]: With dead ends: 1757 [2021-11-21 00:01:15,374 INFO L226 Difference]: Without dead ends: 1428 [2021-11-21 00:01:15,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=744, Invalid=5108, Unknown=0, NotChecked=0, Total=5852 [2021-11-21 00:01:15,383 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 553 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 1905 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 1905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:15,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 520 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 1905 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-21 00:01:15,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-11-21 00:01:15,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1283. [2021-11-21 00:01:15,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1037 states have (on average 1.1388621022179364) internal successors, (1181), 1017 states have internal predecessors, (1181), 188 states have call successors, (188), 32 states have call predecessors, (188), 54 states have return successors, (464), 233 states have call predecessors, (464), 188 states have call successors, (464) [2021-11-21 00:01:15,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 1833 transitions. [2021-11-21 00:01:15,561 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 1833 transitions. Word has length 205 [2021-11-21 00:01:15,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:15,562 INFO L470 AbstractCegarLoop]: Abstraction has 1283 states and 1833 transitions. [2021-11-21 00:01:15,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.580645161290323) internal successors, (142), 29 states have internal predecessors, (142), 14 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (20), 13 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-21 00:01:15,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 1833 transitions. [2021-11-21 00:01:15,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-21 00:01:15,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:15,572 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2021-11-21 00:01:15,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-21 00:01:15,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-21 00:01:15,788 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:01:15,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:15,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1973857141, now seen corresponding path program 4 times [2021-11-21 00:01:15,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:15,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544554648] [2021-11-21 00:01:15,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:15,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:16,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2021-11-21 00:01:16,676 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:16,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544554648] [2021-11-21 00:01:16,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544554648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:01:16,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984057365] [2021-11-21 00:01:16,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:01:16,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:16,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:16,678 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:16,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-21 00:01:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:16,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-21 00:01:16,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2021-11-21 00:01:17,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:01:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2021-11-21 00:01:19,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984057365] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:01:19,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1262811952] [2021-11-21 00:01:19,174 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-21 00:01:19,174 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:01:19,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:01:19,175 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:01:19,175 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:01:20,130 INFO L197 IcfgInterpreter]: Interpreting procedure parts with input of size 14 for LOIs [2021-11-21 00:01:20,181 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:01:20,765 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:01:20,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:01:20,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2021-11-21 00:01:20,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357939223] [2021-11-21 00:01:20,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:01:20,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-21 00:01:20,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:20,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-21 00:01:20,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2309, Invalid=8821, Unknown=0, NotChecked=0, Total=11130 [2021-11-21 00:01:20,771 INFO L87 Difference]: Start difference. First operand 1283 states and 1833 transitions. Second operand has 94 states, 93 states have (on average 2.043010752688172) internal successors, (190), 94 states have internal predecessors, (190), 46 states have call successors, (46), 1 states have call predecessors, (46), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-21 00:01:22,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:22,956 INFO L93 Difference]: Finished difference Result 2365 states and 3586 transitions. [2021-11-21 00:01:22,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-21 00:01:22,957 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 2.043010752688172) internal successors, (190), 94 states have internal predecessors, (190), 46 states have call successors, (46), 1 states have call predecessors, (46), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Word has length 210 [2021-11-21 00:01:22,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:22,982 INFO L225 Difference]: With dead ends: 2365 [2021-11-21 00:01:22,982 INFO L226 Difference]: Without dead ends: 2364 [2021-11-21 00:01:22,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 721 GetRequests, 571 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6071 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5598, Invalid=17354, Unknown=0, NotChecked=0, Total=22952 [2021-11-21 00:01:22,993 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 780 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:22,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 598 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:01:22,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2021-11-21 00:01:23,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 2099. [2021-11-21 00:01:23,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 1709 states have (on average 1.1544763019309539) internal successors, (1973), 1665 states have internal predecessors, (1973), 332 states have call successors, (332), 32 states have call predecessors, (332), 54 states have return successors, (848), 401 states have call predecessors, (848), 332 states have call successors, (848) [2021-11-21 00:01:23,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 3153 transitions. [2021-11-21 00:01:23,197 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 3153 transitions. Word has length 210 [2021-11-21 00:01:23,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:23,198 INFO L470 AbstractCegarLoop]: Abstraction has 2099 states and 3153 transitions. [2021-11-21 00:01:23,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 2.043010752688172) internal successors, (190), 94 states have internal predecessors, (190), 46 states have call successors, (46), 1 states have call predecessors, (46), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-21 00:01:23,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 3153 transitions. [2021-11-21 00:01:23,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-21 00:01:23,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:23,206 INFO L514 BasicCegarLoop]: trace histogram [24, 22, 16, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-21 00:01:23,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-21 00:01:23,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-21 00:01:23,420 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:01:23,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:23,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1605201853, now seen corresponding path program 1 times [2021-11-21 00:01:23,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:23,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768223009] [2021-11-21 00:01:23,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:23,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:23,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1517 backedges. 152 proven. 178 refuted. 0 times theorem prover too weak. 1187 trivial. 0 not checked. [2021-11-21 00:01:23,548 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:23,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768223009] [2021-11-21 00:01:23,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768223009] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:01:23,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244390753] [2021-11-21 00:01:23,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:23,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:23,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:23,550 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:23,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-21 00:01:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:23,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:01:23,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1517 backedges. 239 proven. 47 refuted. 0 times theorem prover too weak. 1231 trivial. 0 not checked. [2021-11-21 00:01:24,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:01:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1517 backedges. 239 proven. 47 refuted. 0 times theorem prover too weak. 1231 trivial. 0 not checked. [2021-11-21 00:01:24,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244390753] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:01:24,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1210922403] [2021-11-21 00:01:24,537 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 00:01:24,537 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:01:24,538 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:01:24,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:01:24,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2021-11-21 00:01:24,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990865260] [2021-11-21 00:01:24,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:01:24,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-21 00:01:24,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:24,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-21 00:01:24,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-11-21 00:01:24,541 INFO L87 Difference]: Start difference. First operand 2099 states and 3153 transitions. Second operand has 27 states, 26 states have (on average 4.423076923076923) internal successors, (115), 22 states have internal predecessors, (115), 15 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2021-11-21 00:01:25,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:25,757 INFO L93 Difference]: Finished difference Result 3634 states and 5590 transitions. [2021-11-21 00:01:25,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-21 00:01:25,757 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.423076923076923) internal successors, (115), 22 states have internal predecessors, (115), 15 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) Word has length 237 [2021-11-21 00:01:25,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:25,792 INFO L225 Difference]: With dead ends: 3634 [2021-11-21 00:01:25,792 INFO L226 Difference]: Without dead ends: 3631 [2021-11-21 00:01:25,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1591 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=866, Invalid=5140, Unknown=0, NotChecked=0, Total=6006 [2021-11-21 00:01:25,797 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 569 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:25,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 275 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:01:25,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2021-11-21 00:01:26,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 3001. [2021-11-21 00:01:26,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3001 states, 2426 states have (on average 1.154987633965375) internal successors, (2802), 2376 states have internal predecessors, (2802), 455 states have call successors, (455), 64 states have call predecessors, (455), 117 states have return successors, (984), 560 states have call predecessors, (984), 455 states have call successors, (984) [2021-11-21 00:01:26,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3001 states to 3001 states and 4241 transitions. [2021-11-21 00:01:26,071 INFO L78 Accepts]: Start accepts. Automaton has 3001 states and 4241 transitions. Word has length 237 [2021-11-21 00:01:26,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:26,072 INFO L470 AbstractCegarLoop]: Abstraction has 3001 states and 4241 transitions. [2021-11-21 00:01:26,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.423076923076923) internal successors, (115), 22 states have internal predecessors, (115), 15 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2021-11-21 00:01:26,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3001 states and 4241 transitions. [2021-11-21 00:01:26,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-21 00:01:26,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:26,080 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 15, 9, 9, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:26,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-21 00:01:26,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:26,296 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting partsErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:01:26,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:26,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1580209437, now seen corresponding path program 1 times [2021-11-21 00:01:26,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:26,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067846268] [2021-11-21 00:01:26,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:26,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:26,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:26,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 170 proven. 4 refuted. 0 times theorem prover too weak. 1159 trivial. 0 not checked. [2021-11-21 00:01:26,372 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:26,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067846268] [2021-11-21 00:01:26,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067846268] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:01:26,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700534719] [2021-11-21 00:01:26,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:26,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:26,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:26,374 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:26,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-21 00:01:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:26,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:01:26,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:26,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 262 proven. 0 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2021-11-21 00:01:26,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:01:26,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700534719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:01:26,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:01:26,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-21 00:01:26,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379286627] [2021-11-21 00:01:26,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:01:26,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:01:26,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:26,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:01:26,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:01:26,812 INFO L87 Difference]: Start difference. First operand 3001 states and 4241 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-21 00:01:27,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:27,020 INFO L93 Difference]: Finished difference Result 4807 states and 7503 transitions. [2021-11-21 00:01:27,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:01:27,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 223 [2021-11-21 00:01:27,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:27,045 INFO L225 Difference]: With dead ends: 4807 [2021-11-21 00:01:27,045 INFO L226 Difference]: Without dead ends: 2871 [2021-11-21 00:01:27,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:01:27,067 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 28 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:27,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 69 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:01:27,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2021-11-21 00:01:27,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2859. [2021-11-21 00:01:27,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2859 states, 2308 states have (on average 1.149046793760832) internal successors, (2652), 2269 states have internal predecessors, (2652), 444 states have call successors, (444), 64 states have call predecessors, (444), 104 states have return successors, (918), 525 states have call predecessors, (918), 444 states have call successors, (918) [2021-11-21 00:01:27,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 4014 transitions. [2021-11-21 00:01:27,346 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 4014 transitions. Word has length 223 [2021-11-21 00:01:27,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:27,347 INFO L470 AbstractCegarLoop]: Abstraction has 2859 states and 4014 transitions. [2021-11-21 00:01:27,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-21 00:01:27,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 4014 transitions. [2021-11-21 00:01:27,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-21 00:01:27,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:27,356 INFO L514 BasicCegarLoop]: trace histogram [27, 24, 19, 11, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-21 00:01:27,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-21 00:01:27,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-21 00:01:27,584 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting partsErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:01:27,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:27,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1338611463, now seen corresponding path program 2 times [2021-11-21 00:01:27,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:27,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638853457] [2021-11-21 00:01:27,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:27,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1889 backedges. 223 proven. 224 refuted. 0 times theorem prover too weak. 1442 trivial. 0 not checked. [2021-11-21 00:01:27,793 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:27,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638853457] [2021-11-21 00:01:27,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638853457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:01:27,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31359510] [2021-11-21 00:01:27,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:01:27,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:27,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:27,795 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:27,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-21 00:01:27,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 00:01:27,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:01:27,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:01:27,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1889 backedges. 399 proven. 23 refuted. 0 times theorem prover too weak. 1467 trivial. 0 not checked. [2021-11-21 00:01:28,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:01:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1889 backedges. 399 proven. 23 refuted. 0 times theorem prover too weak. 1467 trivial. 0 not checked. [2021-11-21 00:01:29,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31359510] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:01:29,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [432552774] [2021-11-21 00:01:29,154 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 00:01:29,154 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:01:29,155 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:01:29,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:01:29,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 30 [2021-11-21 00:01:29,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311272600] [2021-11-21 00:01:29,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:01:29,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-21 00:01:29,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:29,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-21 00:01:29,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2021-11-21 00:01:29,160 INFO L87 Difference]: Start difference. First operand 2859 states and 4014 transitions. Second operand has 30 states, 28 states have (on average 4.107142857142857) internal successors, (115), 28 states have internal predecessors, (115), 12 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2021-11-21 00:01:30,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:30,294 INFO L93 Difference]: Finished difference Result 4591 states and 7220 transitions. [2021-11-21 00:01:30,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-21 00:01:30,294 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 4.107142857142857) internal successors, (115), 28 states have internal predecessors, (115), 12 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) Word has length 263 [2021-11-21 00:01:30,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:30,321 INFO L225 Difference]: With dead ends: 4591 [2021-11-21 00:01:30,321 INFO L226 Difference]: Without dead ends: 2748 [2021-11-21 00:01:30,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=472, Invalid=2950, Unknown=0, NotChecked=0, Total=3422 [2021-11-21 00:01:30,349 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 372 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:30,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 270 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:01:30,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2021-11-21 00:01:30,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 2707. [2021-11-21 00:01:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2707 states, 2190 states have (on average 1.1515981735159817) internal successors, (2522), 2153 states have internal predecessors, (2522), 420 states have call successors, (420), 63 states have call predecessors, (420), 94 states have return successors, (830), 490 states have call predecessors, (830), 420 states have call successors, (830) [2021-11-21 00:01:30,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 3772 transitions. [2021-11-21 00:01:30,604 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 3772 transitions. Word has length 263 [2021-11-21 00:01:30,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:30,605 INFO L470 AbstractCegarLoop]: Abstraction has 2707 states and 3772 transitions. [2021-11-21 00:01:30,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 4.107142857142857) internal successors, (115), 28 states have internal predecessors, (115), 12 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2021-11-21 00:01:30,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 3772 transitions. [2021-11-21 00:01:30,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-21 00:01:30,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:30,614 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 16, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:30,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-21 00:01:30,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:30,840 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting partsErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:01:30,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:30,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1095752036, now seen corresponding path program 3 times [2021-11-21 00:01:30,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:30,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602846633] [2021-11-21 00:01:30,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:30,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:30,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 294 proven. 10 refuted. 0 times theorem prover too weak. 1286 trivial. 0 not checked. [2021-11-21 00:01:30,961 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:30,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602846633] [2021-11-21 00:01:30,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602846633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:01:30,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193452981] [2021-11-21 00:01:30,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:01:30,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:30,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:30,964 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:30,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-21 00:01:31,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:01:31,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:01:31,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 00:01:31,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 294 proven. 10 refuted. 0 times theorem prover too weak. 1286 trivial. 0 not checked. [2021-11-21 00:01:31,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:01:32,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 308 proven. 10 refuted. 0 times theorem prover too weak. 1272 trivial. 0 not checked. [2021-11-21 00:01:32,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193452981] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:01:32,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1954646605] [2021-11-21 00:01:32,146 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 00:01:32,146 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:01:32,147 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:01:32,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:01:32,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 11 [2021-11-21 00:01:32,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053333692] [2021-11-21 00:01:32,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:01:32,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:01:32,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:32,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:01:32,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:01:32,158 INFO L87 Difference]: Start difference. First operand 2707 states and 3772 transitions. Second operand has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 3 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (11), 8 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 00:01:32,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:32,448 INFO L93 Difference]: Finished difference Result 2902 states and 4205 transitions. [2021-11-21 00:01:32,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 00:01:32,449 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 3 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (11), 8 states have call predecessors, (11), 3 states have call successors, (11) Word has length 243 [2021-11-21 00:01:32,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:32,492 INFO L225 Difference]: With dead ends: 2902 [2021-11-21 00:01:32,493 INFO L226 Difference]: Without dead ends: 2901 [2021-11-21 00:01:32,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:01:32,496 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 13 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:32,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 260 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:01:32,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2021-11-21 00:01:32,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 2812. [2021-11-21 00:01:32,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2812 states, 2275 states have (on average 1.1472527472527472) internal successors, (2610), 2227 states have internal predecessors, (2610), 431 states have call successors, (431), 63 states have call predecessors, (431), 103 states have return successors, (885), 521 states have call predecessors, (885), 431 states have call successors, (885) [2021-11-21 00:01:32,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 3926 transitions. [2021-11-21 00:01:32,731 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 3926 transitions. Word has length 243 [2021-11-21 00:01:32,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:32,732 INFO L470 AbstractCegarLoop]: Abstraction has 2812 states and 3926 transitions. [2021-11-21 00:01:32,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 3 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (11), 8 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 00:01:32,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 3926 transitions. [2021-11-21 00:01:32,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-21 00:01:32,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:32,740 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 16, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:32,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-21 00:01:32,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:32,956 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting partsErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:01:32,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:32,956 INFO L85 PathProgramCache]: Analyzing trace with hash 391425312, now seen corresponding path program 1 times [2021-11-21 00:01:32,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:32,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154158477] [2021-11-21 00:01:32,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:32,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:33,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 300 proven. 10 refuted. 0 times theorem prover too weak. 1286 trivial. 0 not checked. [2021-11-21 00:01:33,060 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:33,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154158477] [2021-11-21 00:01:33,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154158477] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:01:33,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100211409] [2021-11-21 00:01:33,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:33,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:33,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:33,062 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:33,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-21 00:01:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:33,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 00:01:33,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 261 proven. 26 refuted. 0 times theorem prover too weak. 1309 trivial. 0 not checked. [2021-11-21 00:01:33,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:01:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 272 proven. 27 refuted. 0 times theorem prover too weak. 1297 trivial. 0 not checked. [2021-11-21 00:01:34,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100211409] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:01:34,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1435461913] [2021-11-21 00:01:34,115 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 00:01:34,116 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:01:34,116 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:01:34,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:01:34,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 10] total 14 [2021-11-21 00:01:34,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287811023] [2021-11-21 00:01:34,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:01:34,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 00:01:34,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:34,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 00:01:34,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:01:34,128 INFO L87 Difference]: Start difference. First operand 2812 states and 3926 transitions. Second operand has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 15 states have internal predecessors, (62), 3 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (12), 8 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-21 00:01:34,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:34,315 INFO L93 Difference]: Finished difference Result 3055 states and 4544 transitions. [2021-11-21 00:01:34,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 00:01:34,316 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 15 states have internal predecessors, (62), 3 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (12), 8 states have call predecessors, (12), 3 states have call successors, (12) Word has length 244 [2021-11-21 00:01:34,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:34,333 INFO L225 Difference]: With dead ends: 3055 [2021-11-21 00:01:34,333 INFO L226 Difference]: Without dead ends: 3054 [2021-11-21 00:01:34,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-11-21 00:01:34,336 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:34,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 189 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:01:34,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3054 states. [2021-11-21 00:01:34,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3054 to 2902. [2021-11-21 00:01:34,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2349 states have (on average 1.1455938697318007) internal successors, (2691), 2294 states have internal predecessors, (2691), 442 states have call successors, (442), 63 states have call predecessors, (442), 108 states have return successors, (937), 544 states have call predecessors, (937), 442 states have call successors, (937) [2021-11-21 00:01:34,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 4070 transitions. [2021-11-21 00:01:34,606 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 4070 transitions. Word has length 244 [2021-11-21 00:01:34,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:34,608 INFO L470 AbstractCegarLoop]: Abstraction has 2902 states and 4070 transitions. [2021-11-21 00:01:34,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 15 states have internal predecessors, (62), 3 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (12), 8 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-21 00:01:34,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 4070 transitions. [2021-11-21 00:01:34,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-11-21 00:01:34,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:34,618 INFO L514 BasicCegarLoop]: trace histogram [30, 27, 21, 12, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-21 00:01:34,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-21 00:01:34,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-21 00:01:34,844 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting partsErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:01:34,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:34,844 INFO L85 PathProgramCache]: Analyzing trace with hash 2008473328, now seen corresponding path program 4 times [2021-11-21 00:01:34,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:34,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833940107] [2021-11-21 00:01:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:34,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2386 backedges. 332 proven. 306 refuted. 0 times theorem prover too weak. 1748 trivial. 0 not checked. [2021-11-21 00:01:35,034 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:35,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833940107] [2021-11-21 00:01:35,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833940107] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:01:35,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344740400] [2021-11-21 00:01:35,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:01:35,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:35,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:35,036 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:35,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-21 00:01:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:35,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 00:01:35,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:35,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2386 backedges. 1020 proven. 195 refuted. 0 times theorem prover too weak. 1171 trivial. 0 not checked. [2021-11-21 00:01:35,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:01:36,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2386 backedges. 332 proven. 306 refuted. 0 times theorem prover too weak. 1748 trivial. 0 not checked. [2021-11-21 00:01:36,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344740400] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:01:36,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [88116439] [2021-11-21 00:01:36,241 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 00:01:36,241 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:01:36,241 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:01:36,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:01:36,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 18 [2021-11-21 00:01:36,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072914364] [2021-11-21 00:01:36,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:01:36,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 00:01:36,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:36,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 00:01:36,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-11-21 00:01:36,245 INFO L87 Difference]: Start difference. First operand 2902 states and 4070 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 16 states have internal predecessors, (92), 11 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (13), 7 states have call predecessors, (13), 9 states have call successors, (13) [2021-11-21 00:01:36,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:36,754 INFO L93 Difference]: Finished difference Result 4929 states and 7120 transitions. [2021-11-21 00:01:36,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 00:01:36,755 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 16 states have internal predecessors, (92), 11 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (13), 7 states have call predecessors, (13), 9 states have call successors, (13) Word has length 294 [2021-11-21 00:01:36,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:36,770 INFO L225 Difference]: With dead ends: 4929 [2021-11-21 00:01:36,770 INFO L226 Difference]: Without dead ends: 3078 [2021-11-21 00:01:36,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 586 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-11-21 00:01:36,784 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 209 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:36,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 234 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:01:36,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-11-21 00:01:37,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 3057. [2021-11-21 00:01:37,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3057 states, 2471 states have (on average 1.1412383650343991) internal successors, (2820), 2419 states have internal predecessors, (2820), 456 states have call successors, (456), 76 states have call predecessors, (456), 127 states have return successors, (955), 561 states have call predecessors, (955), 456 states have call successors, (955) [2021-11-21 00:01:37,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3057 states to 3057 states and 4231 transitions. [2021-11-21 00:01:37,030 INFO L78 Accepts]: Start accepts. Automaton has 3057 states and 4231 transitions. Word has length 294 [2021-11-21 00:01:37,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:37,031 INFO L470 AbstractCegarLoop]: Abstraction has 3057 states and 4231 transitions. [2021-11-21 00:01:37,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 16 states have internal predecessors, (92), 11 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (13), 7 states have call predecessors, (13), 9 states have call successors, (13) [2021-11-21 00:01:37,032 INFO L276 IsEmpty]: Start isEmpty. Operand 3057 states and 4231 transitions. [2021-11-21 00:01:37,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-11-21 00:01:37,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:37,042 INFO L514 BasicCegarLoop]: trace histogram [34, 31, 24, 14, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2021-11-21 00:01:37,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-21 00:01:37,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-21 00:01:37,263 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting partsErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:01:37,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:37,263 INFO L85 PathProgramCache]: Analyzing trace with hash 588468092, now seen corresponding path program 5 times [2021-11-21 00:01:37,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:37,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584558631] [2021-11-21 00:01:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:37,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3090 backedges. 467 proven. 239 refuted. 0 times theorem prover too weak. 2384 trivial. 0 not checked. [2021-11-21 00:01:37,472 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:37,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584558631] [2021-11-21 00:01:37,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584558631] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:01:37,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978789176] [2021-11-21 00:01:37,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:01:37,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:37,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:37,474 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:37,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-21 00:01:37,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-21 00:01:37,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:01:37,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 00:01:37,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3090 backedges. 707 proven. 68 refuted. 0 times theorem prover too weak. 2315 trivial. 0 not checked. [2021-11-21 00:01:38,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:01:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3090 backedges. 707 proven. 74 refuted. 0 times theorem prover too weak. 2309 trivial. 0 not checked. [2021-11-21 00:01:40,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978789176] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:01:40,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [804033062] [2021-11-21 00:01:40,080 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 00:01:40,080 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:01:40,080 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:01:40,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:01:40,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 33 [2021-11-21 00:01:40,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177516063] [2021-11-21 00:01:40,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:01:40,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-21 00:01:40,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:40,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-21 00:01:40,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 00:01:40,085 INFO L87 Difference]: Start difference. First operand 3057 states and 4231 transitions. Second operand has 33 states, 33 states have (on average 4.181818181818182) internal successors, (138), 31 states have internal predecessors, (138), 18 states have call successors, (24), 4 states have call predecessors, (24), 8 states have return successors, (24), 14 states have call predecessors, (24), 17 states have call successors, (24) [2021-11-21 00:01:42,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:42,784 INFO L93 Difference]: Finished difference Result 7556 states and 12142 transitions. [2021-11-21 00:01:42,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-21 00:01:42,784 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.181818181818182) internal successors, (138), 31 states have internal predecessors, (138), 18 states have call successors, (24), 4 states have call predecessors, (24), 8 states have return successors, (24), 14 states have call predecessors, (24), 17 states have call successors, (24) Word has length 331 [2021-11-21 00:01:42,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:42,821 INFO L225 Difference]: With dead ends: 7556 [2021-11-21 00:01:42,821 INFO L226 Difference]: Without dead ends: 5598 [2021-11-21 00:01:42,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 724 GetRequests, 652 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=898, Invalid=4214, Unknown=0, NotChecked=0, Total=5112 [2021-11-21 00:01:42,838 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 1519 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 1058 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1529 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 2461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1058 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:42,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1529 Valid, 505 Invalid, 2461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1058 Valid, 1403 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-21 00:01:42,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5598 states. [2021-11-21 00:01:43,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5598 to 4053. [2021-11-21 00:01:43,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4053 states, 3224 states have (on average 1.1451612903225807) internal successors, (3692), 3235 states have internal predecessors, (3692), 687 states have call successors, (687), 93 states have call predecessors, (687), 139 states have return successors, (1564), 724 states have call predecessors, (1564), 687 states have call successors, (1564) [2021-11-21 00:01:43,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 5943 transitions. [2021-11-21 00:01:43,330 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 5943 transitions. Word has length 331 [2021-11-21 00:01:43,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:43,331 INFO L470 AbstractCegarLoop]: Abstraction has 4053 states and 5943 transitions. [2021-11-21 00:01:43,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.181818181818182) internal successors, (138), 31 states have internal predecessors, (138), 18 states have call successors, (24), 4 states have call predecessors, (24), 8 states have return successors, (24), 14 states have call predecessors, (24), 17 states have call successors, (24) [2021-11-21 00:01:43,332 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 5943 transitions. [2021-11-21 00:01:43,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-11-21 00:01:43,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:43,346 INFO L514 BasicCegarLoop]: trace histogram [37, 35, 27, 14, 13, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-21 00:01:43,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-21 00:01:43,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:43,572 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting partsErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:01:43,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:43,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1745340390, now seen corresponding path program 6 times [2021-11-21 00:01:43,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:43,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879948523] [2021-11-21 00:01:43,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:43,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3887 backedges. 560 proven. 378 refuted. 0 times theorem prover too weak. 2949 trivial. 0 not checked. [2021-11-21 00:01:43,795 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:43,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879948523] [2021-11-21 00:01:43,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879948523] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:01:43,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732601214] [2021-11-21 00:01:43,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:01:43,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:43,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:43,797 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:43,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-21 00:01:43,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:01:43,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:01:43,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 00:01:43,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3887 backedges. 1899 proven. 187 refuted. 0 times theorem prover too weak. 1801 trivial. 0 not checked. [2021-11-21 00:01:44,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:01:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3887 backedges. 700 proven. 468 refuted. 0 times theorem prover too weak. 2719 trivial. 0 not checked. [2021-11-21 00:01:46,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732601214] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:01:46,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1279156294] [2021-11-21 00:01:46,146 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 00:01:46,146 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:01:46,146 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:01:46,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:01:46,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 19] total 37 [2021-11-21 00:01:46,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970546396] [2021-11-21 00:01:46,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:01:46,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-21 00:01:46,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:46,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-21 00:01:46,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 00:01:46,151 INFO L87 Difference]: Start difference. First operand 4053 states and 5943 transitions. Second operand has 37 states, 37 states have (on average 4.756756756756757) internal successors, (176), 36 states have internal predecessors, (176), 21 states have call successors, (29), 4 states have call predecessors, (29), 9 states have return successors, (26), 13 states have call predecessors, (26), 18 states have call successors, (26) [2021-11-21 00:01:48,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:48,124 INFO L93 Difference]: Finished difference Result 6315 states and 10275 transitions. [2021-11-21 00:01:48,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-21 00:01:48,125 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.756756756756757) internal successors, (176), 36 states have internal predecessors, (176), 21 states have call successors, (29), 4 states have call predecessors, (29), 9 states have return successors, (26), 13 states have call predecessors, (26), 18 states have call successors, (26) Word has length 374 [2021-11-21 00:01:48,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:48,150 INFO L225 Difference]: With dead ends: 6315 [2021-11-21 00:01:48,150 INFO L226 Difference]: Without dead ends: 3848 [2021-11-21 00:01:48,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 730 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=729, Invalid=4821, Unknown=0, NotChecked=0, Total=5550 [2021-11-21 00:01:48,169 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 510 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 1930 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 2267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 1930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:48,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 709 Invalid, 2267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 1930 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 00:01:48,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3848 states. [2021-11-21 00:01:48,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3848 to 3599. [2021-11-21 00:01:48,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3599 states, 2867 states have (on average 1.1294035577258459) internal successors, (3238), 2869 states have internal predecessors, (3238), 605 states have call successors, (605), 100 states have call predecessors, (605), 124 states have return successors, (1375), 629 states have call predecessors, (1375), 605 states have call successors, (1375) [2021-11-21 00:01:48,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3599 states to 3599 states and 5218 transitions. [2021-11-21 00:01:48,517 INFO L78 Accepts]: Start accepts. Automaton has 3599 states and 5218 transitions. Word has length 374 [2021-11-21 00:01:48,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:48,518 INFO L470 AbstractCegarLoop]: Abstraction has 3599 states and 5218 transitions. [2021-11-21 00:01:48,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.756756756756757) internal successors, (176), 36 states have internal predecessors, (176), 21 states have call successors, (29), 4 states have call predecessors, (29), 9 states have return successors, (26), 13 states have call predecessors, (26), 18 states have call successors, (26) [2021-11-21 00:01:48,519 INFO L276 IsEmpty]: Start isEmpty. Operand 3599 states and 5218 transitions. [2021-11-21 00:01:48,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2021-11-21 00:01:48,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:48,535 INFO L514 BasicCegarLoop]: trace histogram [45, 43, 34, 18, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 14, 14, 12, 12, 11, 11, 11, 11, 11, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-21 00:01:48,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-21 00:01:48,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-21 00:01:48,752 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting partsErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:01:48,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:48,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1218593354, now seen corresponding path program 7 times [2021-11-21 00:01:48,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:48,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60104143] [2021-11-21 00:01:48,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:48,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5931 backedges. 506 proven. 233 refuted. 0 times theorem prover too weak. 5192 trivial. 0 not checked. [2021-11-21 00:01:49,041 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:49,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60104143] [2021-11-21 00:01:49,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60104143] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:01:49,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905720496] [2021-11-21 00:01:49,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:01:49,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:49,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:49,043 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:49,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-21 00:01:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:49,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 1066 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 00:01:49,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5931 backedges. 3045 proven. 122 refuted. 0 times theorem prover too weak. 2764 trivial. 0 not checked. [2021-11-21 00:01:50,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:01:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5931 backedges. 506 proven. 233 refuted. 0 times theorem prover too weak. 5192 trivial. 0 not checked. [2021-11-21 00:01:51,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905720496] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:01:51,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [893773335] [2021-11-21 00:01:51,253 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 00:01:51,253 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:01:51,254 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:01:51,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:01:51,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 29 [2021-11-21 00:01:51,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892121302] [2021-11-21 00:01:51,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:01:51,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-21 00:01:51,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:51,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-21 00:01:51,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-11-21 00:01:51,258 INFO L87 Difference]: Start difference. First operand 3599 states and 5218 transitions. Second operand has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 12 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-21 00:01:52,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:52,221 INFO L93 Difference]: Finished difference Result 6218 states and 9182 transitions. [2021-11-21 00:01:52,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-21 00:01:52,222 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 12 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) Word has length 457 [2021-11-21 00:01:52,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:52,242 INFO L225 Difference]: With dead ends: 6218 [2021-11-21 00:01:52,243 INFO L226 Difference]: Without dead ends: 3143 [2021-11-21 00:01:52,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 900 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=715, Invalid=2707, Unknown=0, NotChecked=0, Total=3422 [2021-11-21 00:01:52,259 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 53 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:52,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 371 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:01:52,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3143 states. [2021-11-21 00:01:52,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3143 to 3142. [2021-11-21 00:01:52,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 2501 states have (on average 1.147141143542583) internal successors, (2869), 2503 states have internal predecessors, (2869), 514 states have call successors, (514), 100 states have call predecessors, (514), 124 states have return successors, (1195), 538 states have call predecessors, (1195), 514 states have call successors, (1195) [2021-11-21 00:01:52,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4578 transitions. [2021-11-21 00:01:52,481 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4578 transitions. Word has length 457 [2021-11-21 00:01:52,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:52,481 INFO L470 AbstractCegarLoop]: Abstraction has 3142 states and 4578 transitions. [2021-11-21 00:01:52,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 12 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-21 00:01:52,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4578 transitions. [2021-11-21 00:01:52,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2021-11-21 00:01:52,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:52,493 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 33, 17, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 13, 13, 12, 12, 12, 12, 12, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-21 00:01:52,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-21 00:01:52,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-21 00:01:52,716 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting partsErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:01:52,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:52,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1399649223, now seen corresponding path program 8 times [2021-11-21 00:01:52,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:52,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133985620] [2021-11-21 00:01:52,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:52,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:52,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5982 backedges. 439 proven. 162 refuted. 0 times theorem prover too weak. 5381 trivial. 0 not checked. [2021-11-21 00:01:52,971 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:52,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133985620] [2021-11-21 00:01:52,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133985620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:01:52,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319579788] [2021-11-21 00:01:52,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:01:52,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:52,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:52,976 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:53,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-21 00:01:53,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-21 00:01:53,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:01:53,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 00:01:53,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:53,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5982 backedges. 3152 proven. 26 refuted. 0 times theorem prover too weak. 2804 trivial. 0 not checked. [2021-11-21 00:01:53,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:01:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5982 backedges. 505 proven. 237 refuted. 0 times theorem prover too weak. 5240 trivial. 0 not checked. [2021-11-21 00:01:54,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319579788] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:01:54,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [429514750] [2021-11-21 00:01:54,800 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 00:01:54,800 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:01:54,801 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:01:54,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:01:54,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 25 [2021-11-21 00:01:54,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682677665] [2021-11-21 00:01:54,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:01:54,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-21 00:01:54,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:54,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-21 00:01:54,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-11-21 00:01:54,804 INFO L87 Difference]: Start difference. First operand 3142 states and 4578 transitions. Second operand has 25 states, 25 states have (on average 4.48) internal successors, (112), 24 states have internal predecessors, (112), 10 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 11 states have call predecessors, (21), 10 states have call successors, (21) [2021-11-21 00:01:55,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:55,940 INFO L93 Difference]: Finished difference Result 6674 states and 10119 transitions. [2021-11-21 00:01:55,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-21 00:01:55,941 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.48) internal successors, (112), 24 states have internal predecessors, (112), 10 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 11 states have call predecessors, (21), 10 states have call successors, (21) Word has length 459 [2021-11-21 00:01:55,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:55,970 INFO L225 Difference]: With dead ends: 6674 [2021-11-21 00:01:55,970 INFO L226 Difference]: Without dead ends: 4354 [2021-11-21 00:01:55,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 963 GetRequests, 914 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=2142, Unknown=0, NotChecked=0, Total=2550 [2021-11-21 00:01:55,987 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 92 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:55,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 322 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:01:55,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2021-11-21 00:01:56,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 3672. [2021-11-21 00:01:56,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3672 states, 3027 states have (on average 1.0921704658077305) internal successors, (3306), 2901 states have internal predecessors, (3306), 514 states have call successors, (514), 100 states have call predecessors, (514), 128 states have return successors, (1415), 670 states have call predecessors, (1415), 514 states have call successors, (1415) [2021-11-21 00:01:56,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3672 states to 3672 states and 5235 transitions. [2021-11-21 00:01:56,416 INFO L78 Accepts]: Start accepts. Automaton has 3672 states and 5235 transitions. Word has length 459 [2021-11-21 00:01:56,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:56,417 INFO L470 AbstractCegarLoop]: Abstraction has 3672 states and 5235 transitions. [2021-11-21 00:01:56,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.48) internal successors, (112), 24 states have internal predecessors, (112), 10 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 11 states have call predecessors, (21), 10 states have call successors, (21) [2021-11-21 00:01:56,418 INFO L276 IsEmpty]: Start isEmpty. Operand 3672 states and 5235 transitions. [2021-11-21 00:01:56,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2021-11-21 00:01:56,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:56,427 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 46, 46, 1, 1, 1, 1, 1] [2021-11-21 00:01:56,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-21 00:01:56,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-21 00:01:56,641 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:01:56,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:56,641 INFO L85 PathProgramCache]: Analyzing trace with hash -319947531, now seen corresponding path program 5 times [2021-11-21 00:01:56,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:56,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678180480] [2021-11-21 00:01:56,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:56,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:59,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9683 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2021-11-21 00:01:59,504 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:59,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678180480] [2021-11-21 00:01:59,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678180480] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:01:59,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488621688] [2021-11-21 00:01:59,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:01:59,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:59,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:59,508 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:59,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-21 00:01:59,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-21 00:01:59,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:01:59,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-21 00:01:59,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:02:00,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9683 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2021-11-21 00:02:00,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:02:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9683 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2021-11-21 00:02:07,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488621688] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:02:07,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [158887564] [2021-11-21 00:02:07,848 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-21 00:02:07,848 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:02:07,849 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:02:07,849 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:02:07,849 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:02:08,955 INFO L197 IcfgInterpreter]: Interpreting procedure parts with input of size 14 for LOIs [2021-11-21 00:02:09,005 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:02:09,951 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:02:09,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:02:09,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 189 [2021-11-21 00:02:09,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976509208] [2021-11-21 00:02:09,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:02:09,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2021-11-21 00:02:09,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:09,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2021-11-21 00:02:09,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9173, Invalid=31429, Unknown=0, NotChecked=0, Total=40602 [2021-11-21 00:02:09,962 INFO L87 Difference]: Start difference. First operand 3672 states and 5235 transitions. Second operand has 190 states, 189 states have (on average 2.0211640211640214) internal successors, (382), 190 states have internal predecessors, (382), 94 states have call successors, (94), 1 states have call predecessors, (94), 1 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-21 00:02:18,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:02:18,374 INFO L93 Difference]: Finished difference Result 6996 states and 10430 transitions. [2021-11-21 00:02:18,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-11-21 00:02:18,375 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 189 states have (on average 2.0211640211640214) internal successors, (382), 190 states have internal predecessors, (382), 94 states have call successors, (94), 1 states have call predecessors, (94), 1 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) Word has length 426 [2021-11-21 00:02:18,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:02:18,406 INFO L225 Difference]: With dead ends: 6996 [2021-11-21 00:02:18,406 INFO L226 Difference]: Without dead ends: 6995 [2021-11-21 00:02:18,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1465 GetRequests, 1171 SyntacticMatches, 0 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21431 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=22662, Invalid=64658, Unknown=0, NotChecked=0, Total=87320 [2021-11-21 00:02:18,418 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 1894 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1894 SdHoareTripleChecker+Valid, 1324 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:02:18,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1894 Valid, 1324 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 00:02:18,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6995 states. [2021-11-21 00:02:18,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6995 to 6168. [2021-11-21 00:02:18,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6168 states, 5139 states have (on average 1.1009924109748979) internal successors, (5658), 4869 states have internal predecessors, (5658), 898 states have call successors, (898), 100 states have call predecessors, (898), 128 states have return successors, (2663), 1198 states have call predecessors, (2663), 898 states have call successors, (2663) [2021-11-21 00:02:18,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6168 states to 6168 states and 9219 transitions. [2021-11-21 00:02:18,974 INFO L78 Accepts]: Start accepts. Automaton has 6168 states and 9219 transitions. Word has length 426 [2021-11-21 00:02:18,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:02:18,975 INFO L470 AbstractCegarLoop]: Abstraction has 6168 states and 9219 transitions. [2021-11-21 00:02:18,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 189 states have (on average 2.0211640211640214) internal successors, (382), 190 states have internal predecessors, (382), 94 states have call successors, (94), 1 states have call predecessors, (94), 1 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-21 00:02:18,975 INFO L276 IsEmpty]: Start isEmpty. Operand 6168 states and 9219 transitions. [2021-11-21 00:02:18,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2021-11-21 00:02:18,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:02:18,987 INFO L514 BasicCegarLoop]: trace histogram [56, 55, 41, 22, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 15, 15, 15, 14, 14, 14, 14, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2021-11-21 00:02:19,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-21 00:02:19,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-21 00:02:19,208 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting partsErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:02:19,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:02:19,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1954131387, now seen corresponding path program 9 times [2021-11-21 00:02:19,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:02:19,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448818809] [2021-11-21 00:02:19,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:02:19,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:02:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:02:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9342 backedges. 612 proven. 461 refuted. 0 times theorem prover too weak. 8269 trivial. 0 not checked. [2021-11-21 00:02:19,423 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:02:19,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448818809] [2021-11-21 00:02:19,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448818809] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:02:19,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973434392] [2021-11-21 00:02:19,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:02:19,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:02:19,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:02:19,428 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:02:19,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-21 00:02:19,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:02:19,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:02:19,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 1325 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 00:02:19,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:02:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9342 backedges. 2889 proven. 42 refuted. 0 times theorem prover too weak. 6411 trivial. 0 not checked. [2021-11-21 00:02:20,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:02:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9342 backedges. 646 proven. 926 refuted. 0 times theorem prover too weak. 7770 trivial. 0 not checked. [2021-11-21 00:02:21,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973434392] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:02:21,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [440590012] [2021-11-21 00:02:21,588 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 00:02:21,588 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:02:21,588 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:02:21,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:02:21,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 20 [2021-11-21 00:02:21,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710787968] [2021-11-21 00:02:21,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:02:21,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 00:02:21,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:21,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 00:02:21,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-11-21 00:02:21,591 INFO L87 Difference]: Start difference. First operand 6168 states and 9219 transitions. Second operand has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 10 states have call successors, (20), 2 states have call predecessors, (20), 5 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) [2021-11-21 00:02:22,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:02:22,470 INFO L93 Difference]: Finished difference Result 11998 states and 18849 transitions. [2021-11-21 00:02:22,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-21 00:02:22,471 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 10 states have call successors, (20), 2 states have call predecessors, (20), 5 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) Word has length 568 [2021-11-21 00:02:22,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:02:22,503 INFO L225 Difference]: With dead ends: 11998 [2021-11-21 00:02:22,503 INFO L226 Difference]: Without dead ends: 6335 [2021-11-21 00:02:22,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1173 GetRequests, 1132 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 00:02:22,532 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 210 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:02:22,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 133 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:02:22,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6335 states. [2021-11-21 00:02:22,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6335 to 5736. [2021-11-21 00:02:22,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5736 states, 4725 states have (on average 1.108994708994709) internal successors, (5240), 4540 states have internal predecessors, (5240), 886 states have call successors, (886), 94 states have call predecessors, (886), 122 states have return successors, (2558), 1101 states have call predecessors, (2558), 886 states have call successors, (2558) [2021-11-21 00:02:22,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5736 states to 5736 states and 8684 transitions. [2021-11-21 00:02:22,992 INFO L78 Accepts]: Start accepts. Automaton has 5736 states and 8684 transitions. Word has length 568 [2021-11-21 00:02:22,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:02:22,993 INFO L470 AbstractCegarLoop]: Abstraction has 5736 states and 8684 transitions. [2021-11-21 00:02:22,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 10 states have call successors, (20), 2 states have call predecessors, (20), 5 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) [2021-11-21 00:02:22,993 INFO L276 IsEmpty]: Start isEmpty. Operand 5736 states and 8684 transitions. [2021-11-21 00:02:23,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2021-11-21 00:02:23,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:02:23,002 INFO L514 BasicCegarLoop]: trace histogram [58, 56, 43, 24, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 15, 15, 15, 14, 14, 14, 14, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1] [2021-11-21 00:02:23,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-21 00:02:23,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-21 00:02:23,222 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting partsErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:02:23,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:02:23,222 INFO L85 PathProgramCache]: Analyzing trace with hash -270068593, now seen corresponding path program 10 times [2021-11-21 00:02:23,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:02:23,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873033953] [2021-11-21 00:02:23,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:02:23,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:02:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:02:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9869 backedges. 470 proven. 544 refuted. 0 times theorem prover too weak. 8855 trivial. 0 not checked. [2021-11-21 00:02:23,562 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:02:23,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873033953] [2021-11-21 00:02:23,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873033953] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:02:23,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255437466] [2021-11-21 00:02:23,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:02:23,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:02:23,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:02:23,568 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:02:23,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-21 00:02:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:02:23,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 1360 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 00:02:23,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:02:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9869 backedges. 3465 proven. 432 refuted. 0 times theorem prover too weak. 5972 trivial. 0 not checked. [2021-11-21 00:02:24,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:02:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9869 backedges. 470 proven. 544 refuted. 0 times theorem prover too weak. 8855 trivial. 0 not checked. [2021-11-21 00:02:25,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255437466] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:02:25,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [328995138] [2021-11-21 00:02:25,967 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 00:02:25,967 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:02:25,967 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:02:25,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:02:25,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 27 [2021-11-21 00:02:25,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436085004] [2021-11-21 00:02:25,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:02:25,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-21 00:02:25,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:25,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-21 00:02:25,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-11-21 00:02:25,972 INFO L87 Difference]: Start difference. First operand 5736 states and 8684 transitions. Second operand has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 23 states have internal predecessors, (102), 13 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-21 00:02:27,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:02:27,017 INFO L93 Difference]: Finished difference Result 12100 states and 18967 transitions. [2021-11-21 00:02:27,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-21 00:02:27,017 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 23 states have internal predecessors, (102), 13 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) Word has length 583 [2021-11-21 00:02:27,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:02:27,069 INFO L225 Difference]: With dead ends: 12100 [2021-11-21 00:02:27,069 INFO L226 Difference]: Without dead ends: 8026 [2021-11-21 00:02:27,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1214 GetRequests, 1150 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=548, Invalid=2758, Unknown=0, NotChecked=0, Total=3306 [2021-11-21 00:02:27,099 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 195 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:02:27,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 471 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:02:27,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8026 states. [2021-11-21 00:02:27,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8026 to 7996. [2021-11-21 00:02:27,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7996 states, 6677 states have (on average 1.106784484049723) internal successors, (7390), 6307 states have internal predecessors, (7390), 1181 states have call successors, (1181), 103 states have call predecessors, (1181), 135 states have return successors, (3326), 1585 states have call predecessors, (3326), 1181 states have call successors, (3326) [2021-11-21 00:02:27,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7996 states to 7996 states and 11897 transitions. [2021-11-21 00:02:27,889 INFO L78 Accepts]: Start accepts. Automaton has 7996 states and 11897 transitions. Word has length 583 [2021-11-21 00:02:27,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:02:27,890 INFO L470 AbstractCegarLoop]: Abstraction has 7996 states and 11897 transitions. [2021-11-21 00:02:27,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 23 states have internal predecessors, (102), 13 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-21 00:02:27,891 INFO L276 IsEmpty]: Start isEmpty. Operand 7996 states and 11897 transitions. [2021-11-21 00:02:27,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2021-11-21 00:02:27,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:02:27,898 INFO L514 BasicCegarLoop]: trace histogram [57, 56, 42, 23, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 15, 15, 15, 14, 14, 14, 14, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1] [2021-11-21 00:02:27,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-21 00:02:28,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-21 00:02:28,112 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting partsErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:02:28,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:02:28,112 INFO L85 PathProgramCache]: Analyzing trace with hash 68605851, now seen corresponding path program 11 times [2021-11-21 00:02:28,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:02:28,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773350932] [2021-11-21 00:02:28,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:02:28,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:02:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:02:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9633 backedges. 1501 proven. 32 refuted. 0 times theorem prover too weak. 8100 trivial. 0 not checked. [2021-11-21 00:02:28,397 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:02:28,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773350932] [2021-11-21 00:02:28,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773350932] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:02:28,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050775613] [2021-11-21 00:02:28,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:02:28,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:02:28,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:02:28,399 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:02:28,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-21 00:02:28,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-21 00:02:28,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:02:28,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 00:02:28,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:02:29,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9633 backedges. 1501 proven. 32 refuted. 0 times theorem prover too weak. 8100 trivial. 0 not checked. [2021-11-21 00:02:29,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:02:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9633 backedges. 1558 proven. 32 refuted. 0 times theorem prover too weak. 8043 trivial. 0 not checked. [2021-11-21 00:02:30,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050775613] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:02:30,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1325655654] [2021-11-21 00:02:30,832 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 00:02:30,832 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:02:30,832 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:02:30,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:02:30,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 10] total 14 [2021-11-21 00:02:30,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798514813] [2021-11-21 00:02:30,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:02:30,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 00:02:30,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:30,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 00:02:30,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:02:30,834 INFO L87 Difference]: Start difference. First operand 7996 states and 11897 transitions. Second operand has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 3 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (14), 11 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-21 00:02:31,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:02:31,286 INFO L93 Difference]: Finished difference Result 8248 states and 13007 transitions. [2021-11-21 00:02:31,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-21 00:02:31,287 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 3 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (14), 11 states have call predecessors, (14), 3 states have call successors, (14) Word has length 576 [2021-11-21 00:02:31,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:02:31,323 INFO L225 Difference]: With dead ends: 8248 [2021-11-21 00:02:31,323 INFO L226 Difference]: Without dead ends: 8247 [2021-11-21 00:02:31,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1178 GetRequests, 1160 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-11-21 00:02:31,331 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:02:31,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 199 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:02:31,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8247 states. [2021-11-21 00:02:31,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8247 to 8144. [2021-11-21 00:02:31,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8144 states, 6794 states have (on average 1.1053871062702385) internal successors, (7510), 6412 states have internal predecessors, (7510), 1199 states have call successors, (1199), 103 states have call predecessors, (1199), 148 states have return successors, (3410), 1628 states have call predecessors, (3410), 1199 states have call successors, (3410) [2021-11-21 00:02:31,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8144 states to 8144 states and 12119 transitions. [2021-11-21 00:02:31,951 INFO L78 Accepts]: Start accepts. Automaton has 8144 states and 12119 transitions. Word has length 576 [2021-11-21 00:02:31,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:02:31,952 INFO L470 AbstractCegarLoop]: Abstraction has 8144 states and 12119 transitions. [2021-11-21 00:02:31,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 3 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (14), 11 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-21 00:02:31,953 INFO L276 IsEmpty]: Start isEmpty. Operand 8144 states and 12119 transitions. [2021-11-21 00:02:31,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2021-11-21 00:02:31,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:02:31,960 INFO L514 BasicCegarLoop]: trace histogram [57, 56, 42, 23, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 15, 15, 15, 14, 14, 14, 14, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1] [2021-11-21 00:02:31,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-21 00:02:32,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:02:32,176 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting partsErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:02:32,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:02:32,176 INFO L85 PathProgramCache]: Analyzing trace with hash 2126781441, now seen corresponding path program 2 times [2021-11-21 00:02:32,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:02:32,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195268212] [2021-11-21 00:02:32,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:02:32,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:02:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:02:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9651 backedges. 1519 proven. 32 refuted. 0 times theorem prover too weak. 8100 trivial. 0 not checked. [2021-11-21 00:02:32,452 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:02:32,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195268212] [2021-11-21 00:02:32,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195268212] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:02:32,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156268660] [2021-11-21 00:02:32,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:02:32,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:02:32,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:02:32,455 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:02:32,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-21 00:02:32,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 00:02:32,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:02:32,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 00:02:32,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:02:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9651 backedges. 1115 proven. 21 refuted. 0 times theorem prover too weak. 8515 trivial. 0 not checked. [2021-11-21 00:02:33,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:02:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9651 backedges. 1115 proven. 21 refuted. 0 times theorem prover too weak. 8515 trivial. 0 not checked. [2021-11-21 00:02:34,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156268660] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:02:34,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2062962729] [2021-11-21 00:02:34,710 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 00:02:34,710 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:02:34,710 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:02:34,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:02:34,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2021-11-21 00:02:34,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653308082] [2021-11-21 00:02:34,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:02:34,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 00:02:34,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:34,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 00:02:34,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:02:34,715 INFO L87 Difference]: Start difference. First operand 8144 states and 12119 transitions. Second operand has 13 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 4 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (11), 8 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-21 00:02:35,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:02:35,078 INFO L93 Difference]: Finished difference Result 8144 states and 12119 transitions. [2021-11-21 00:02:35,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:02:35,079 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 4 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (11), 8 states have call predecessors, (11), 4 states have call successors, (11) Word has length 577 [2021-11-21 00:02:35,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:02:35,110 INFO L225 Difference]: With dead ends: 8144 [2021-11-21 00:02:35,110 INFO L226 Difference]: Without dead ends: 8143 [2021-11-21 00:02:35,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1177 GetRequests, 1165 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:02:35,115 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:02:35,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 216 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:02:35,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8143 states. [2021-11-21 00:02:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8143 to 8017. [2021-11-21 00:02:35,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8017 states, 6690 states have (on average 1.1034379671150971) internal successors, (7382), 6320 states have internal predecessors, (7382), 1183 states have call successors, (1183), 103 states have call predecessors, (1183), 142 states have return successors, (3356), 1593 states have call predecessors, (3356), 1183 states have call successors, (3356) [2021-11-21 00:02:35,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8017 states to 8017 states and 11921 transitions. [2021-11-21 00:02:35,734 INFO L78 Accepts]: Start accepts. Automaton has 8017 states and 11921 transitions. Word has length 577 [2021-11-21 00:02:35,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:02:35,735 INFO L470 AbstractCegarLoop]: Abstraction has 8017 states and 11921 transitions. [2021-11-21 00:02:35,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 4 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (11), 8 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-21 00:02:35,735 INFO L276 IsEmpty]: Start isEmpty. Operand 8017 states and 11921 transitions. [2021-11-21 00:02:35,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2021-11-21 00:02:35,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:02:35,748 INFO L514 BasicCegarLoop]: trace histogram [80, 76, 60, 36, 30, 30, 30, 30, 28, 28, 28, 28, 28, 27, 27, 26, 26, 24, 20, 16, 16, 15, 15, 15, 15, 6, 6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1] [2021-11-21 00:02:35,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-21 00:02:35,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:02:35,976 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting partsErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:02:35,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:02:35,976 INFO L85 PathProgramCache]: Analyzing trace with hash 302346431, now seen corresponding path program 12 times [2021-11-21 00:02:35,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:02:35,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676081308] [2021-11-21 00:02:35,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:02:35,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:02:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:02:36,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18912 backedges. 1930 proven. 901 refuted. 0 times theorem prover too weak. 16081 trivial. 0 not checked. [2021-11-21 00:02:36,388 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:02:36,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676081308] [2021-11-21 00:02:36,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676081308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:02:36,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649020049] [2021-11-21 00:02:36,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:02:36,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:02:36,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:02:36,392 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:02:36,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-21 00:02:36,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:02:36,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:02:36,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 1331 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 00:02:36,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:02:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 18912 backedges. 10172 proven. 371 refuted. 0 times theorem prover too weak. 8369 trivial. 0 not checked. [2021-11-21 00:02:38,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:02:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18912 backedges. 3084 proven. 1941 refuted. 0 times theorem prover too weak. 13887 trivial. 0 not checked. [2021-11-21 00:02:40,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649020049] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:02:40,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [227226647] [2021-11-21 00:02:40,126 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 00:02:40,126 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:02:40,126 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:02:40,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:02:40,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 20] total 38 [2021-11-21 00:02:40,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145810823] [2021-11-21 00:02:40,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:02:40,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-21 00:02:40,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:40,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-21 00:02:40,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1277, Unknown=0, NotChecked=0, Total=1406 [2021-11-21 00:02:40,129 INFO L87 Difference]: Start difference. First operand 8017 states and 11921 transitions. Second operand has 38 states, 38 states have (on average 5.447368421052632) internal successors, (207), 38 states have internal predecessors, (207), 25 states have call successors, (35), 2 states have call predecessors, (35), 10 states have return successors, (36), 17 states have call predecessors, (36), 25 states have call successors, (36) [2021-11-21 00:02:42,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:02:42,750 INFO L93 Difference]: Finished difference Result 13536 states and 23143 transitions. [2021-11-21 00:02:42,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-21 00:02:42,751 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.447368421052632) internal successors, (207), 38 states have internal predecessors, (207), 25 states have call successors, (35), 2 states have call predecessors, (35), 10 states have return successors, (36), 17 states have call predecessors, (36), 25 states have call successors, (36) Word has length 795 [2021-11-21 00:02:42,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:02:42,780 INFO L225 Difference]: With dead ends: 13536 [2021-11-21 00:02:42,780 INFO L226 Difference]: Without dead ends: 6506 [2021-11-21 00:02:42,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1663 GetRequests, 1570 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1183, Invalid=6827, Unknown=0, NotChecked=0, Total=8010 [2021-11-21 00:02:42,814 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 326 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 2672 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 3001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 2672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:02:42,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 718 Invalid, 3001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 2672 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-21 00:02:42,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6506 states. [2021-11-21 00:02:43,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6506 to 6142. [2021-11-21 00:02:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6142 states, 5054 states have (on average 1.0993272655322517) internal successors, (5556), 4863 states have internal predecessors, (5556), 975 states have call successors, (975), 87 states have call predecessors, (975), 111 states have return successors, (2423), 1191 states have call predecessors, (2423), 975 states have call successors, (2423) [2021-11-21 00:02:43,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6142 states to 6142 states and 8954 transitions. [2021-11-21 00:02:43,258 INFO L78 Accepts]: Start accepts. Automaton has 6142 states and 8954 transitions. Word has length 795 [2021-11-21 00:02:43,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:02:43,259 INFO L470 AbstractCegarLoop]: Abstraction has 6142 states and 8954 transitions. [2021-11-21 00:02:43,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.447368421052632) internal successors, (207), 38 states have internal predecessors, (207), 25 states have call successors, (35), 2 states have call predecessors, (35), 10 states have return successors, (36), 17 states have call predecessors, (36), 25 states have call successors, (36) [2021-11-21 00:02:43,259 INFO L276 IsEmpty]: Start isEmpty. Operand 6142 states and 8954 transitions. [2021-11-21 00:02:43,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 767 [2021-11-21 00:02:43,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:02:43,267 INFO L514 BasicCegarLoop]: trace histogram [76, 75, 57, 33, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 26, 26, 24, 19, 16, 16, 15, 15, 15, 15, 6, 6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1] [2021-11-21 00:02:43,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-21 00:02:43,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-21 00:02:43,468 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting partsErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:02:43,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:02:43,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1924651268, now seen corresponding path program 13 times [2021-11-21 00:02:43,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:02:43,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780574290] [2021-11-21 00:02:43,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:02:43,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:02:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:02:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 17506 backedges. 1827 proven. 281 refuted. 0 times theorem prover too weak. 15398 trivial. 0 not checked. [2021-11-21 00:02:43,851 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:02:43,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780574290] [2021-11-21 00:02:43,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780574290] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:02:43,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090484586] [2021-11-21 00:02:43,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:02:43,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:02:43,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:02:43,853 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:02:43,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-21 00:02:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:02:44,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 1767 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-21 00:02:44,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:02:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 17506 backedges. 2104 proven. 281 refuted. 0 times theorem prover too weak. 15121 trivial. 0 not checked. [2021-11-21 00:02:45,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:02:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 17506 backedges. 1888 proven. 509 refuted. 0 times theorem prover too weak. 15109 trivial. 0 not checked. [2021-11-21 00:02:47,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090484586] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:02:47,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1024970943] [2021-11-21 00:02:47,919 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 00:02:47,920 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:02:47,920 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:02:47,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:02:47,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 24] total 49 [2021-11-21 00:02:47,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48025333] [2021-11-21 00:02:47,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:02:47,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-21 00:02:47,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:47,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-21 00:02:47,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2021-11-21 00:02:47,925 INFO L87 Difference]: Start difference. First operand 6142 states and 8954 transitions. Second operand has 49 states, 49 states have (on average 4.061224489795919) internal successors, (199), 46 states have internal predecessors, (199), 27 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (36), 26 states have call predecessors, (36), 24 states have call successors, (36) [2021-11-21 00:02:51,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:02:51,652 INFO L93 Difference]: Finished difference Result 12220 states and 19276 transitions. [2021-11-21 00:02:51,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-21 00:02:51,652 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.061224489795919) internal successors, (199), 46 states have internal predecessors, (199), 27 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (36), 26 states have call predecessors, (36), 24 states have call successors, (36) Word has length 766 [2021-11-21 00:02:51,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:02:51,689 INFO L225 Difference]: With dead ends: 12220 [2021-11-21 00:02:51,689 INFO L226 Difference]: Without dead ends: 7157 [2021-11-21 00:02:51,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1633 GetRequests, 1523 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3595 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1486, Invalid=10504, Unknown=0, NotChecked=0, Total=11990 [2021-11-21 00:02:51,714 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 354 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 3244 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 3522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 3244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:02:51,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 830 Invalid, 3522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 3244 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-21 00:02:51,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7157 states. [2021-11-21 00:02:52,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7157 to 6874. [2021-11-21 00:02:52,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6874 states, 5632 states have (on average 1.0941051136363635) internal successors, (6162), 5432 states have internal predecessors, (6162), 1069 states have call successors, (1069), 121 states have call predecessors, (1069), 171 states have return successors, (2764), 1320 states have call predecessors, (2764), 1069 states have call successors, (2764) [2021-11-21 00:02:52,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6874 states to 6874 states and 9995 transitions. [2021-11-21 00:02:52,312 INFO L78 Accepts]: Start accepts. Automaton has 6874 states and 9995 transitions. Word has length 766 [2021-11-21 00:02:52,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:02:52,313 INFO L470 AbstractCegarLoop]: Abstraction has 6874 states and 9995 transitions. [2021-11-21 00:02:52,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.061224489795919) internal successors, (199), 46 states have internal predecessors, (199), 27 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (36), 26 states have call predecessors, (36), 24 states have call successors, (36) [2021-11-21 00:02:52,313 INFO L276 IsEmpty]: Start isEmpty. Operand 6874 states and 9995 transitions. [2021-11-21 00:02:52,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 803 [2021-11-21 00:02:52,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:02:52,325 INFO L514 BasicCegarLoop]: trace histogram [80, 78, 60, 35, 29, 29, 29, 29, 29, 29, 29, 29, 29, 28, 28, 27, 27, 25, 20, 16, 16, 15, 15, 15, 15, 6, 6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1] [2021-11-21 00:02:52,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-21 00:02:52,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-21 00:02:52,525 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting partsErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:02:52,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:02:52,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1298681618, now seen corresponding path program 14 times [2021-11-21 00:02:52,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:02:52,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818141903] [2021-11-21 00:02:52,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:02:52,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:02:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:02:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 19288 backedges. 1868 proven. 1048 refuted. 0 times theorem prover too weak. 16372 trivial. 0 not checked. [2021-11-21 00:02:53,164 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:02:53,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818141903] [2021-11-21 00:02:53,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818141903] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:02:53,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265456817] [2021-11-21 00:02:53,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:02:53,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:02:53,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:02:53,166 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:02:53,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-21 00:02:53,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-21 00:02:53,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:02:53,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 1688 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-21 00:02:53,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:02:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 19288 backedges. 3693 proven. 168 refuted. 0 times theorem prover too weak. 15427 trivial. 0 not checked. [2021-11-21 00:02:54,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:02:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 19288 backedges. 3750 proven. 166 refuted. 0 times theorem prover too weak. 15372 trivial. 0 not checked. [2021-11-21 00:02:57,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265456817] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:02:57,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [327180419] [2021-11-21 00:02:57,697 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 00:02:57,698 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:02:57,698 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:02:57,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:02:57,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 11, 15] total 44 [2021-11-21 00:02:57,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508530501] [2021-11-21 00:02:57,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:02:57,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-21 00:02:57,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:57,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-21 00:02:57,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1738, Unknown=0, NotChecked=0, Total=1892 [2021-11-21 00:02:57,703 INFO L87 Difference]: Start difference. First operand 6874 states and 9995 transitions. Second operand has 44 states, 44 states have (on average 3.6136363636363638) internal successors, (159), 39 states have internal predecessors, (159), 18 states have call successors, (24), 3 states have call predecessors, (24), 9 states have return successors, (32), 27 states have call predecessors, (32), 17 states have call successors, (32) [2021-11-21 00:03:02,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:03:02,583 INFO L93 Difference]: Finished difference Result 14004 states and 27436 transitions. [2021-11-21 00:03:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-11-21 00:03:02,584 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.6136363636363638) internal successors, (159), 39 states have internal predecessors, (159), 18 states have call successors, (24), 3 states have call predecessors, (24), 9 states have return successors, (32), 27 states have call predecessors, (32), 17 states have call successors, (32) Word has length 802 [2021-11-21 00:03:02,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:03:02,671 INFO L225 Difference]: With dead ends: 14004 [2021-11-21 00:03:02,672 INFO L226 Difference]: Without dead ends: 8771 [2021-11-21 00:03:02,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1777 GetRequests, 1609 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9883 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2950, Invalid=25780, Unknown=0, NotChecked=0, Total=28730 [2021-11-21 00:03:02,720 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 655 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 2787 mSolverCounterSat, 707 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 3494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 2787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:03:02,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 197 Invalid, 3494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 2787 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-21 00:03:02,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8771 states. [2021-11-21 00:03:03,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8771 to 7705. [2021-11-21 00:03:03,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7705 states, 6288 states have (on average 1.0869910941475827) internal successors, (6835), 6068 states have internal predecessors, (6835), 1168 states have call successors, (1168), 125 states have call predecessors, (1168), 247 states have return successors, (3790), 1511 states have call predecessors, (3790), 1168 states have call successors, (3790) [2021-11-21 00:03:03,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7705 states to 7705 states and 11793 transitions. [2021-11-21 00:03:03,581 INFO L78 Accepts]: Start accepts. Automaton has 7705 states and 11793 transitions. Word has length 802 [2021-11-21 00:03:03,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:03:03,583 INFO L470 AbstractCegarLoop]: Abstraction has 7705 states and 11793 transitions. [2021-11-21 00:03:03,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.6136363636363638) internal successors, (159), 39 states have internal predecessors, (159), 18 states have call successors, (24), 3 states have call predecessors, (24), 9 states have return successors, (32), 27 states have call predecessors, (32), 17 states have call successors, (32) [2021-11-21 00:03:03,583 INFO L276 IsEmpty]: Start isEmpty. Operand 7705 states and 11793 transitions. [2021-11-21 00:03:03,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 935 [2021-11-21 00:03:03,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:03:03,603 INFO L514 BasicCegarLoop]: trace histogram [95, 89, 73, 46, 36, 36, 36, 36, 33, 33, 33, 33, 33, 32, 32, 31, 31, 27, 22, 16, 16, 15, 15, 15, 15, 10, 10, 9, 9, 4, 3, 3, 3, 1, 1, 1, 1] [2021-11-21 00:03:03,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-21 00:03:03,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:03:03,804 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting partsErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:03:03,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:03:03,805 INFO L85 PathProgramCache]: Analyzing trace with hash -743362345, now seen corresponding path program 15 times [2021-11-21 00:03:03,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:03:03,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954081427] [2021-11-21 00:03:03,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:03,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:03:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 26583 backedges. 1646 proven. 1404 refuted. 0 times theorem prover too weak. 23533 trivial. 0 not checked. [2021-11-21 00:03:04,396 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:03:04,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954081427] [2021-11-21 00:03:04,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954081427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:03:04,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808766839] [2021-11-21 00:03:04,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:03:04,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:03:04,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:03:04,398 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:03:04,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-21 00:03:04,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:03:04,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:03:04,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 1568 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-21 00:03:04,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:03:06,371 INFO L134 CoverageAnalysis]: Checked inductivity of 26583 backedges. 14223 proven. 587 refuted. 0 times theorem prover too weak. 11773 trivial. 0 not checked. [2021-11-21 00:03:06,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:03:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 26583 backedges. 2769 proven. 2476 refuted. 0 times theorem prover too weak. 21338 trivial. 0 not checked. [2021-11-21 00:03:08,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808766839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:03:08,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [621775224] [2021-11-21 00:03:08,911 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 00:03:08,911 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:03:08,912 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:03:08,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:03:08,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 21] total 46 [2021-11-21 00:03:08,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174499133] [2021-11-21 00:03:08,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:03:08,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-21 00:03:08,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:03:08,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-21 00:03:08,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1899, Unknown=0, NotChecked=0, Total=2070 [2021-11-21 00:03:08,917 INFO L87 Difference]: Start difference. First operand 7705 states and 11793 transitions. Second operand has 46 states, 45 states have (on average 4.711111111111111) internal successors, (212), 43 states have internal predecessors, (212), 27 states have call successors, (37), 10 states have call predecessors, (37), 9 states have return successors, (32), 18 states have call predecessors, (32), 22 states have call successors, (32) [2021-11-21 00:03:13,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:03:13,846 INFO L93 Difference]: Finished difference Result 21122 states and 45885 transitions. [2021-11-21 00:03:13,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-21 00:03:13,846 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 4.711111111111111) internal successors, (212), 43 states have internal predecessors, (212), 27 states have call successors, (37), 10 states have call predecessors, (37), 9 states have return successors, (32), 18 states have call predecessors, (32), 22 states have call successors, (32) Word has length 934 [2021-11-21 00:03:13,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:03:13,974 INFO L225 Difference]: With dead ends: 21122 [2021-11-21 00:03:13,974 INFO L226 Difference]: Without dead ends: 15064 [2021-11-21 00:03:14,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1990 GetRequests, 1857 SyntacticMatches, 4 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4818 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2191, Invalid=14839, Unknown=0, NotChecked=0, Total=17030 [2021-11-21 00:03:14,057 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1174 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 2730 mSolverCounterSat, 1009 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1174 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 3739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1009 IncrementalHoareTripleChecker+Valid, 2730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:03:14,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1174 Valid, 524 Invalid, 3739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1009 Valid, 2730 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-21 00:03:14,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15064 states. [2021-11-21 00:03:15,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15064 to 12774. [2021-11-21 00:03:15,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12774 states, 10423 states have (on average 1.0761776839681474) internal successors, (11217), 10078 states have internal predecessors, (11217), 1972 states have call successors, (1972), 206 states have call predecessors, (1972), 377 states have return successors, (12253), 2489 states have call predecessors, (12253), 1972 states have call successors, (12253) [2021-11-21 00:03:15,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12774 states to 12774 states and 25442 transitions. [2021-11-21 00:03:15,264 INFO L78 Accepts]: Start accepts. Automaton has 12774 states and 25442 transitions. Word has length 934 [2021-11-21 00:03:15,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:03:15,265 INFO L470 AbstractCegarLoop]: Abstraction has 12774 states and 25442 transitions. [2021-11-21 00:03:15,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 4.711111111111111) internal successors, (212), 43 states have internal predecessors, (212), 27 states have call successors, (37), 10 states have call predecessors, (37), 9 states have return successors, (32), 18 states have call predecessors, (32), 22 states have call successors, (32) [2021-11-21 00:03:15,265 INFO L276 IsEmpty]: Start isEmpty. Operand 12774 states and 25442 transitions. [2021-11-21 00:03:15,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1006 [2021-11-21 00:03:15,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:03:15,277 INFO L514 BasicCegarLoop]: trace histogram [100, 99, 76, 46, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 36, 36, 30, 24, 17, 17, 16, 16, 16, 16, 9, 9, 9, 9, 4, 3, 3, 3, 1, 1, 1, 1] [2021-11-21 00:03:15,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-21 00:03:15,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:03:15,477 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting partsErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:03:15,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:03:15,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1997540437, now seen corresponding path program 16 times [2021-11-21 00:03:15,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:03:15,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527112148] [2021-11-21 00:03:15,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:15,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:03:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 30881 backedges. 525 proven. 649 refuted. 0 times theorem prover too weak. 29707 trivial. 0 not checked. [2021-11-21 00:03:16,062 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:03:16,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527112148] [2021-11-21 00:03:16,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527112148] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:03:16,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750301092] [2021-11-21 00:03:16,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:03:16,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:03:16,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:03:16,065 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:03:16,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-21 00:03:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:16,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 2298 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 00:03:16,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:03:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30881 backedges. 13039 proven. 301 refuted. 0 times theorem prover too weak. 17541 trivial. 0 not checked. [2021-11-21 00:03:18,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:03:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 30881 backedges. 525 proven. 649 refuted. 0 times theorem prover too weak. 29707 trivial. 0 not checked. [2021-11-21 00:03:20,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750301092] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:03:20,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1560544398] [2021-11-21 00:03:20,116 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 00:03:20,116 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:03:20,117 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:03:20,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:03:20,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 30 [2021-11-21 00:03:20,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805432369] [2021-11-21 00:03:20,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:03:20,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-21 00:03:20,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:03:20,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-21 00:03:20,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-11-21 00:03:20,121 INFO L87 Difference]: Start difference. First operand 12774 states and 25442 transitions. Second operand has 30 states, 30 states have (on average 3.3333333333333335) internal successors, (100), 30 states have internal predecessors, (100), 15 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 15 states have call predecessors, (21), 15 states have call successors, (21) [2021-11-21 00:03:21,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:03:21,312 INFO L93 Difference]: Finished difference Result 25058 states and 50223 transitions. [2021-11-21 00:03:21,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-21 00:03:21,312 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.3333333333333335) internal successors, (100), 30 states have internal predecessors, (100), 15 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 15 states have call predecessors, (21), 15 states have call successors, (21) Word has length 1005 [2021-11-21 00:03:21,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:03:21,407 INFO L225 Difference]: With dead ends: 25058 [2021-11-21 00:03:21,407 INFO L226 Difference]: Without dead ends: 12774 [2021-11-21 00:03:21,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2043 GetRequests, 1999 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=1555, Unknown=0, NotChecked=0, Total=1892 [2021-11-21 00:03:21,542 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 73 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:03:21,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 393 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:03:21,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12774 states. [2021-11-21 00:03:22,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12774 to 12774. [2021-11-21 00:03:22,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12774 states, 10423 states have (on average 1.0758898589657488) internal successors, (11214), 10078 states have internal predecessors, (11214), 1972 states have call successors, (1972), 206 states have call predecessors, (1972), 377 states have return successors, (12253), 2489 states have call predecessors, (12253), 1972 states have call successors, (12253) [2021-11-21 00:03:22,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12774 states to 12774 states and 25439 transitions. [2021-11-21 00:03:22,785 INFO L78 Accepts]: Start accepts. Automaton has 12774 states and 25439 transitions. Word has length 1005 [2021-11-21 00:03:22,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:03:22,786 INFO L470 AbstractCegarLoop]: Abstraction has 12774 states and 25439 transitions. [2021-11-21 00:03:22,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.3333333333333335) internal successors, (100), 30 states have internal predecessors, (100), 15 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 15 states have call predecessors, (21), 15 states have call successors, (21) [2021-11-21 00:03:22,786 INFO L276 IsEmpty]: Start isEmpty. Operand 12774 states and 25439 transitions. [2021-11-21 00:03:22,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 859 [2021-11-21 00:03:22,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:03:22,795 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 95, 95, 94, 94, 1, 1, 1, 1, 1] [2021-11-21 00:03:22,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-21 00:03:22,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-21 00:03:22,996 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:03:22,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:03:22,997 INFO L85 PathProgramCache]: Analyzing trace with hash 433790965, now seen corresponding path program 6 times [2021-11-21 00:03:22,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:03:22,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423864191] [2021-11-21 00:03:22,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:22,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:03:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 40091 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2021-11-21 00:03:32,956 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:03:32,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423864191] [2021-11-21 00:03:32,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423864191] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:03:32,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133050919] [2021-11-21 00:03:32,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:03:32,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:03:32,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:03:32,957 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:03:32,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-21 00:03:33,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:03:33,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:03:33,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 2391 conjuncts, 191 conjunts are in the unsatisfiable core [2021-11-21 00:03:33,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:03:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 40091 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2021-11-21 00:03:34,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:03:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 40091 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2021-11-21 00:03:58,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133050919] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:03:58,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1752969590] [2021-11-21 00:03:58,940 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-21 00:03:58,940 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:03:58,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:03:58,940 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:03:58,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:03:59,866 INFO L197 IcfgInterpreter]: Interpreting procedure parts with input of size 14 for LOIs [2021-11-21 00:03:59,916 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:04:01,289 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:04:01,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:04:01,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 381 [2021-11-21 00:04:01,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712776921] [2021-11-21 00:04:01,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:04:01,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 382 states [2021-11-21 00:04:01,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:04:01,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 382 interpolants. [2021-11-21 00:04:01,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36725, Invalid=118117, Unknown=0, NotChecked=0, Total=154842 [2021-11-21 00:04:01,306 INFO L87 Difference]: Start difference. First operand 12774 states and 25439 transitions. Second operand has 382 states, 381 states have (on average 2.010498687664042) internal successors, (766), 382 states have internal predecessors, (766), 190 states have call successors, (190), 1 states have call predecessors, (190), 1 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2021-11-21 00:04:57,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:04:57,925 INFO L93 Difference]: Finished difference Result 23852 states and 48228 transitions. [2021-11-21 00:04:57,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 383 states. [2021-11-21 00:04:57,925 INFO L78 Accepts]: Start accepts. Automaton has has 382 states, 381 states have (on average 2.010498687664042) internal successors, (766), 382 states have internal predecessors, (766), 190 states have call successors, (190), 1 states have call predecessors, (190), 1 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) Word has length 858 [2021-11-21 00:04:57,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:04:58,032 INFO L225 Difference]: With dead ends: 23852 [2021-11-21 00:04:58,032 INFO L226 Difference]: Without dead ends: 23851 [2021-11-21 00:04:58,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2953 GetRequests, 2371 SyntacticMatches, 0 SemanticMatches, 582 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79799 ImplicationChecksByTransitivity, 49.5s TimeCoverageRelationStatistics Valid=91350, Invalid=249122, Unknown=0, NotChecked=0, Total=340472 [2021-11-21 00:04:58,067 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 5238 mSDsluCounter, 2045 mSDsCounter, 0 mSdLazyCounter, 2466 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5238 SdHoareTripleChecker+Valid, 2268 SdHoareTripleChecker+Invalid, 2566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:04:58,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5238 Valid, 2268 Invalid, 2566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2466 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-21 00:04:58,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23851 states. [2021-11-21 00:04:59,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23851 to 21606. [2021-11-21 00:04:59,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21606 states, 17719 states have (on average 1.0825667362717986) internal successors, (19182), 17086 states have internal predecessors, (19182), 3508 states have call successors, (3508), 206 states have call predecessors, (3508), 377 states have return successors, (21757), 4313 states have call predecessors, (21757), 3508 states have call successors, (21757) [2021-11-21 00:04:59,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21606 states to 21606 states and 44447 transitions. [2021-11-21 00:04:59,727 INFO L78 Accepts]: Start accepts. Automaton has 21606 states and 44447 transitions. Word has length 858 [2021-11-21 00:04:59,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:04:59,728 INFO L470 AbstractCegarLoop]: Abstraction has 21606 states and 44447 transitions. [2021-11-21 00:04:59,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 382 states, 381 states have (on average 2.010498687664042) internal successors, (766), 382 states have internal predecessors, (766), 190 states have call successors, (190), 1 states have call predecessors, (190), 1 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2021-11-21 00:04:59,729 INFO L276 IsEmpty]: Start isEmpty. Operand 21606 states and 44447 transitions. [2021-11-21 00:04:59,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1132 [2021-11-21 00:04:59,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:04:59,745 INFO L514 BasicCegarLoop]: trace histogram [113, 112, 85, 52, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 40, 40, 33, 28, 20, 20, 19, 19, 19, 19, 11, 11, 11, 11, 4, 3, 3, 3, 1, 1, 1, 1] [2021-11-21 00:04:59,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-21 00:04:59,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-21 00:04:59,960 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting partsErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:04:59,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:04:59,960 INFO L85 PathProgramCache]: Analyzing trace with hash 706508414, now seen corresponding path program 17 times [2021-11-21 00:04:59,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:04:59,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150613713] [2021-11-21 00:04:59,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:04:59,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 39222 backedges. 587 proven. 935 refuted. 0 times theorem prover too weak. 37700 trivial. 0 not checked. [2021-11-21 00:05:00,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:00,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150613713] [2021-11-21 00:05:00,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150613713] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:05:00,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214137683] [2021-11-21 00:05:00,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:05:00,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:05:00,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:05:00,567 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:05:00,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-21 00:05:00,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-21 00:05:00,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:05:00,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 1190 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 00:05:00,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:05:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 39222 backedges. 16560 proven. 933 refuted. 0 times theorem prover too weak. 21729 trivial. 0 not checked. [2021-11-21 00:05:02,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:05:04,877 INFO L134 CoverageAnalysis]: Checked inductivity of 39222 backedges. 1931 proven. 1814 refuted. 0 times theorem prover too weak. 35477 trivial. 0 not checked. [2021-11-21 00:05:04,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214137683] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:05:04,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [478207294] [2021-11-21 00:05:04,878 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 00:05:04,878 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:05:04,879 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:05:04,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:05:04,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 24] total 41 [2021-11-21 00:05:04,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495399073] [2021-11-21 00:05:04,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:05:04,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-21 00:05:04,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:04,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-21 00:05:04,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 00:05:04,882 INFO L87 Difference]: Start difference. First operand 21606 states and 44447 transitions. Second operand has 41 states, 41 states have (on average 4.024390243902439) internal successors, (165), 39 states have internal predecessors, (165), 20 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (30), 19 states have call predecessors, (30), 18 states have call successors, (30) [2021-11-21 00:05:07,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:07,632 INFO L93 Difference]: Finished difference Result 21907 states and 47308 transitions. [2021-11-21 00:05:07,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-21 00:05:07,633 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.024390243902439) internal successors, (165), 39 states have internal predecessors, (165), 20 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (30), 19 states have call predecessors, (30), 18 states have call successors, (30) Word has length 1131 [2021-11-21 00:05:07,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:07,761 INFO L225 Difference]: With dead ends: 21907 [2021-11-21 00:05:07,761 INFO L226 Difference]: Without dead ends: 21739 [2021-11-21 00:05:07,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2339 GetRequests, 2246 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2401 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1281, Invalid=7461, Unknown=0, NotChecked=0, Total=8742 [2021-11-21 00:05:07,781 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 420 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 1585 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:07,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 320 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1585 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 00:05:07,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21739 states. [2021-11-21 00:05:09,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21739 to 21612. [2021-11-21 00:05:09,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21612 states, 17725 states have (on average 1.0825387870239773) internal successors, (19188), 17090 states have internal predecessors, (19188), 3506 states have call successors, (3506), 205 states have call predecessors, (3506), 379 states have return successors, (21756), 4316 states have call predecessors, (21756), 3506 states have call successors, (21756) [2021-11-21 00:05:09,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21612 states to 21612 states and 44450 transitions. [2021-11-21 00:05:09,620 INFO L78 Accepts]: Start accepts. Automaton has 21612 states and 44450 transitions. Word has length 1131 [2021-11-21 00:05:09,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:09,621 INFO L470 AbstractCegarLoop]: Abstraction has 21612 states and 44450 transitions. [2021-11-21 00:05:09,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.024390243902439) internal successors, (165), 39 states have internal predecessors, (165), 20 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (30), 19 states have call predecessors, (30), 18 states have call successors, (30) [2021-11-21 00:05:09,621 INFO L276 IsEmpty]: Start isEmpty. Operand 21612 states and 44450 transitions. [2021-11-21 00:05:09,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1137 [2021-11-21 00:05:09,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:09,637 INFO L514 BasicCegarLoop]: trace histogram [114, 112, 86, 53, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 40, 40, 33, 28, 20, 20, 19, 19, 19, 19, 12, 12, 11, 11, 4, 3, 3, 3, 1, 1, 1, 1] [2021-11-21 00:05:09,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-21 00:05:09,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-11-21 00:05:09,845 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting partsErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:05:09,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:09,846 INFO L85 PathProgramCache]: Analyzing trace with hash 2111661565, now seen corresponding path program 18 times [2021-11-21 00:05:09,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:09,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627360400] [2021-11-21 00:05:09,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:09,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:10,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 39596 backedges. 2681 proven. 1340 refuted. 0 times theorem prover too weak. 35575 trivial. 0 not checked. [2021-11-21 00:05:10,431 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:10,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627360400] [2021-11-21 00:05:10,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627360400] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:05:10,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66855123] [2021-11-21 00:05:10,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:05:10,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:05:10,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:05:10,433 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:05:10,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-21 00:05:10,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:05:10,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:05:10,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-21 00:05:10,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:05:12,827 INFO L134 CoverageAnalysis]: Checked inductivity of 39596 backedges. 4214 proven. 2410 refuted. 0 times theorem prover too weak. 32972 trivial. 0 not checked. [2021-11-21 00:05:12,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:05:16,563 INFO L134 CoverageAnalysis]: Checked inductivity of 39596 backedges. 4184 proven. 2459 refuted. 0 times theorem prover too weak. 32953 trivial. 0 not checked. [2021-11-21 00:05:16,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66855123] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:05:16,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1181880538] [2021-11-21 00:05:16,564 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 00:05:16,565 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:05:16,565 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:05:16,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:05:16,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 23] total 46 [2021-11-21 00:05:16,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602824785] [2021-11-21 00:05:16,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:05:16,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-21 00:05:16,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:16,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-21 00:05:16,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1907, Unknown=0, NotChecked=0, Total=2070 [2021-11-21 00:05:16,569 INFO L87 Difference]: Start difference. First operand 21612 states and 44450 transitions. Second operand has 46 states, 46 states have (on average 5.304347826086956) internal successors, (244), 43 states have internal predecessors, (244), 29 states have call successors, (42), 6 states have call predecessors, (42), 13 states have return successors, (42), 25 states have call predecessors, (42), 27 states have call successors, (42) [2021-11-21 00:05:23,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:23,897 INFO L93 Difference]: Finished difference Result 44593 states and 118933 transitions. [2021-11-21 00:05:23,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-21 00:05:23,898 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 5.304347826086956) internal successors, (244), 43 states have internal predecessors, (244), 29 states have call successors, (42), 6 states have call predecessors, (42), 13 states have return successors, (42), 25 states have call predecessors, (42), 27 states have call successors, (42) Word has length 1136 [2021-11-21 00:05:23,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:24,147 INFO L225 Difference]: With dead ends: 44593 [2021-11-21 00:05:24,147 INFO L226 Difference]: Without dead ends: 26199 [2021-11-21 00:05:24,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2377 GetRequests, 2257 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3550 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2508, Invalid=11772, Unknown=0, NotChecked=0, Total=14280 [2021-11-21 00:05:24,431 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 1068 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 3522 mSolverCounterSat, 929 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1068 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 4451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 929 IncrementalHoareTripleChecker+Valid, 3522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:24,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1068 Valid, 1099 Invalid, 4451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [929 Valid, 3522 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-21 00:05:24,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26199 states. [2021-11-21 00:05:26,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26199 to 24401. [2021-11-21 00:05:26,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24401 states, 20108 states have (on average 1.0838969564352496) internal successors, (21795), 19273 states have internal predecessors, (21795), 3794 states have call successors, (3794), 263 states have call predecessors, (3794), 497 states have return successors, (23971), 4864 states have call predecessors, (23971), 3794 states have call successors, (23971) [2021-11-21 00:05:27,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24401 states to 24401 states and 49560 transitions. [2021-11-21 00:05:27,130 INFO L78 Accepts]: Start accepts. Automaton has 24401 states and 49560 transitions. Word has length 1136 [2021-11-21 00:05:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:27,131 INFO L470 AbstractCegarLoop]: Abstraction has 24401 states and 49560 transitions. [2021-11-21 00:05:27,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 5.304347826086956) internal successors, (244), 43 states have internal predecessors, (244), 29 states have call successors, (42), 6 states have call predecessors, (42), 13 states have return successors, (42), 25 states have call predecessors, (42), 27 states have call successors, (42) [2021-11-21 00:05:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 24401 states and 49560 transitions. [2021-11-21 00:05:27,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1532 [2021-11-21 00:05:27,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:27,366 INFO L514 BasicCegarLoop]: trace histogram [151, 150, 119, 69, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 58, 58, 50, 32, 23, 23, 22, 22, 22, 22, 10, 10, 10, 10, 5, 4, 4, 4, 1, 1, 1, 1] [2021-11-21 00:05:27,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-21 00:05:27,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-21 00:05:27,584 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting partsErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:05:27,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:27,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1931135922, now seen corresponding path program 19 times [2021-11-21 00:05:27,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:27,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269039468] [2021-11-21 00:05:27,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:27,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 72828 backedges. 4864 proven. 3077 refuted. 0 times theorem prover too weak. 64887 trivial. 0 not checked. [2021-11-21 00:05:28,816 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:28,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269039468] [2021-11-21 00:05:28,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269039468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:05:28,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101496305] [2021-11-21 00:05:28,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:05:28,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:05:28,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:05:28,818 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:05:28,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-21 00:05:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:29,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 3466 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 00:05:29,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:05:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 72828 backedges. 33072 proven. 1081 refuted. 0 times theorem prover too weak. 38675 trivial. 0 not checked. [2021-11-21 00:05:31,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:05:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 72828 backedges. 4898 proven. 3062 refuted. 0 times theorem prover too weak. 64868 trivial. 0 not checked. [2021-11-21 00:05:35,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101496305] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:05:35,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1531473887] [2021-11-21 00:05:35,651 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 00:05:35,651 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:05:35,651 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:05:35,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:05:35,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 25] total 33 [2021-11-21 00:05:35,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554529839] [2021-11-21 00:05:35,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:05:35,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-21 00:05:35,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:35,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-21 00:05:35,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 00:05:35,659 INFO L87 Difference]: Start difference. First operand 24401 states and 49560 transitions. Second operand has 33 states, 33 states have (on average 5.2727272727272725) internal successors, (174), 33 states have internal predecessors, (174), 22 states have call successors, (30), 2 states have call predecessors, (30), 8 states have return successors, (35), 14 states have call predecessors, (35), 22 states have call successors, (35) [2021-11-21 00:05:40,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:40,191 INFO L93 Difference]: Finished difference Result 59173 states and 159101 transitions. [2021-11-21 00:05:40,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-21 00:05:40,192 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.2727272727272725) internal successors, (174), 33 states have internal predecessors, (174), 22 states have call successors, (30), 2 states have call predecessors, (30), 8 states have return successors, (35), 14 states have call predecessors, (35), 22 states have call successors, (35) Word has length 1531 [2021-11-21 00:05:40,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:40,806 INFO L225 Difference]: With dead ends: 59173 [2021-11-21 00:05:40,806 INFO L226 Difference]: Without dead ends: 37908 [2021-11-21 00:05:41,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3115 GetRequests, 3052 SyntacticMatches, 8 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=492, Invalid=2700, Unknown=0, NotChecked=0, Total=3192 [2021-11-21 00:05:41,021 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 140 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:41,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 428 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 00:05:41,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37908 states. [2021-11-21 00:05:45,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37908 to 36386. [2021-11-21 00:05:45,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36386 states, 30141 states have (on average 1.0764075511761388) internal successors, (32444), 28699 states have internal predecessors, (32444), 5578 states have call successors, (5578), 262 states have call predecessors, (5578), 665 states have return successors, (51084), 7424 states have call predecessors, (51084), 5578 states have call successors, (51084) [2021-11-21 00:05:46,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36386 states to 36386 states and 89106 transitions. [2021-11-21 00:05:46,056 INFO L78 Accepts]: Start accepts. Automaton has 36386 states and 89106 transitions. Word has length 1531 [2021-11-21 00:05:46,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:46,057 INFO L470 AbstractCegarLoop]: Abstraction has 36386 states and 89106 transitions. [2021-11-21 00:05:46,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.2727272727272725) internal successors, (174), 33 states have internal predecessors, (174), 22 states have call successors, (30), 2 states have call predecessors, (30), 8 states have return successors, (35), 14 states have call predecessors, (35), 22 states have call successors, (35) [2021-11-21 00:05:46,058 INFO L276 IsEmpty]: Start isEmpty. Operand 36386 states and 89106 transitions. [2021-11-21 00:05:46,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2086 [2021-11-21 00:05:46,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:46,335 INFO L514 BasicCegarLoop]: trace histogram [206, 204, 165, 97, 82, 82, 82, 82, 81, 81, 81, 81, 81, 81, 81, 80, 80, 68, 41, 28, 28, 27, 27, 27, 27, 15, 15, 15, 15, 6, 5, 5, 5, 1, 1, 1, 1] [2021-11-21 00:05:46,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-21 00:05:46,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-21 00:05:46,548 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting partsErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [partsErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, partsErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 00:05:46,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:46,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1031990780, now seen corresponding path program 20 times [2021-11-21 00:05:46,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:46,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494029416] [2021-11-21 00:05:46,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:46,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 136595 backedges. 6074 proven. 3431 refuted. 0 times theorem prover too weak. 127090 trivial. 0 not checked. [2021-11-21 00:05:48,307 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:48,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494029416] [2021-11-21 00:05:48,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494029416] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:05:48,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335890602] [2021-11-21 00:05:48,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:05:48,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:05:48,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:05:48,309 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:05:48,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d3ae60-f5dc-46bd-835e-672d6d297c67/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-21 00:05:48,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-21 00:05:48,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:05:48,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-21 00:05:48,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:05:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 136595 backedges. 7931 proven. 931 refuted. 0 times theorem prover too weak. 127733 trivial. 0 not checked. [2021-11-21 00:05:52,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:05:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 136595 backedges. 7931 proven. 939 refuted. 0 times theorem prover too weak. 127725 trivial. 0 not checked. [2021-11-21 00:05:57,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335890602] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:05:57,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1537823562] [2021-11-21 00:05:57,409 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 00:05:57,409 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:05:57,409 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:05:57,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:05:57,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 30, 33] total 63 [2021-11-21 00:05:57,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458623937] [2021-11-21 00:05:57,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:05:57,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-21 00:05:57,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:57,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-21 00:05:57,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=3692, Unknown=0, NotChecked=0, Total=3906 [2021-11-21 00:05:57,419 INFO L87 Difference]: Start difference. First operand 36386 states and 89106 transitions. Second operand has 63 states, 63 states have (on average 3.873015873015873) internal successors, (244), 59 states have internal predecessors, (244), 33 states have call successors, (42), 5 states have call predecessors, (42), 9 states have return successors, (38), 23 states have call predecessors, (38), 29 states have call successors, (38) [2021-11-21 00:06:18,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:06:18,365 INFO L93 Difference]: Finished difference Result 121752 states and 378328 transitions. [2021-11-21 00:06:18,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2021-11-21 00:06:18,366 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.873015873015873) internal successors, (244), 59 states have internal predecessors, (244), 33 states have call successors, (42), 5 states have call predecessors, (42), 9 states have return successors, (38), 23 states have call predecessors, (38), 29 states have call successors, (38) Word has length 2085 [2021-11-21 00:06:18,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:06:19,246 INFO L225 Difference]: With dead ends: 121752 [2021-11-21 00:06:19,246 INFO L226 Difference]: Without dead ends: 89238 [2021-11-21 00:06:20,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4421 GetRequests, 4139 SyntacticMatches, 2 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26504 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=6475, Invalid=72767, Unknown=0, NotChecked=0, Total=79242 [2021-11-21 00:06:20,452 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1008 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 11165 mSolverCounterSat, 1163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 1678 SdHoareTripleChecker+Invalid, 12328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1163 IncrementalHoareTripleChecker+Valid, 11165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:06:20,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1011 Valid, 1678 Invalid, 12328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1163 Valid, 11165 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-21 00:06:20,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89238 states.