./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/twisted.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_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/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_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/twisted.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/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_fda6ff72-8fbd-4060-8789-f9b6d18da784/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 1b68c797f7da07f29717590596e5fa31674f85e16d7b32a9335da92aff43a272 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:43:10,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:43:10,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:43:11,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:43:11,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:43:11,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:43:11,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:43:11,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:43:11,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:43:11,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:43:11,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:43:11,052 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:43:11,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:43:11,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:43:11,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:43:11,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:43:11,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:43:11,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:43:11,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:43:11,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:43:11,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:43:11,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:43:11,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:43:11,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:43:11,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:43:11,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:43:11,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:43:11,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:43:11,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:43:11,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:43:11,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:43:11,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:43:11,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:43:11,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:43:11,091 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:43:11,091 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:43:11,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:43:11,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:43:11,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:43:11,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:43:11,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:43:11,097 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-21 00:43:11,143 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:43:11,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:43:11,144 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:43:11,144 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:43:11,146 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:43:11,146 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:43:11,146 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:43:11,146 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:43:11,146 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:43:11,147 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:43:11,148 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:43:11,148 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:43:11,148 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:43:11,149 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:43:11,149 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:43:11,149 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:43:11,149 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:43:11,150 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:43:11,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:43:11,151 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 00:43:11,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:43:11,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:43:11,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:43:11,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:43:11,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:43:11,152 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-21 00:43:11,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:43:11,152 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:43:11,153 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:43:11,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:43:11,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:43:11,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:43:11,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:43:11,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:43:11,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:43:11,154 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:43:11,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:43:11,155 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:43:11,155 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:43:11,155 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:43:11,155 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_fda6ff72-8fbd-4060-8789-f9b6d18da784/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b68c797f7da07f29717590596e5fa31674f85e16d7b32a9335da92aff43a272 [2021-11-21 00:43:11,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:43:11,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:43:11,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:43:11,533 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:43:11,534 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:43:11,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/termination-numeric/twisted.c [2021-11-21 00:43:11,654 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/data/e2c58ab85/f4c3a9cb431f4e7ea73ce29f51e1cc2a/FLAG669aeeaf5 [2021-11-21 00:43:12,224 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:43:12,226 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/sv-benchmarks/c/termination-numeric/twisted.c [2021-11-21 00:43:12,238 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/data/e2c58ab85/f4c3a9cb431f4e7ea73ce29f51e1cc2a/FLAG669aeeaf5 [2021-11-21 00:43:12,584 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/data/e2c58ab85/f4c3a9cb431f4e7ea73ce29f51e1cc2a [2021-11-21 00:43:12,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:43:12,592 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:43:12,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:43:12,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:43:12,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:43:12,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:43:12" (1/1) ... [2021-11-21 00:43:12,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35bd69f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:12, skipping insertion in model container [2021-11-21 00:43:12,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:43:12" (1/1) ... [2021-11-21 00:43:12,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:43:12,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:43:12,819 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:43:12,822 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:43:12,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:43:12,851 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:43:12,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:12 WrapperNode [2021-11-21 00:43:12,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:43:12,853 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:43:12,853 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:43:12,853 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:43:12,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:12" (1/1) ... [2021-11-21 00:43:12,863 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:12" (1/1) ... [2021-11-21 00:43:12,883 INFO L137 Inliner]: procedures = 5, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2021-11-21 00:43:12,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:43:12,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:43:12,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:43:12,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:43:12,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:12" (1/1) ... [2021-11-21 00:43:12,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:12" (1/1) ... [2021-11-21 00:43:12,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:12" (1/1) ... [2021-11-21 00:43:12,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:12" (1/1) ... [2021-11-21 00:43:12,897 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:12" (1/1) ... [2021-11-21 00:43:12,901 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:12" (1/1) ... [2021-11-21 00:43:12,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:12" (1/1) ... [2021-11-21 00:43:12,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:43:12,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:43:12,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:43:12,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:43:12,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:12" (1/1) ... [2021-11-21 00:43:12,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:43:12,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:12,951 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:43:12,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:43:12,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:43:12,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:43:13,057 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:43:13,059 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:43:13,200 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:43:13,225 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:43:13,228 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 00:43:13,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:43:13 BoogieIcfgContainer [2021-11-21 00:43:13,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:43:13,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:43:13,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:43:13,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:43:13,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:43:12" (1/3) ... [2021-11-21 00:43:13,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@347d6e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:43:13, skipping insertion in model container [2021-11-21 00:43:13,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:12" (2/3) ... [2021-11-21 00:43:13,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@347d6e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:43:13, skipping insertion in model container [2021-11-21 00:43:13,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:43:13" (3/3) ... [2021-11-21 00:43:13,241 INFO L111 eAbstractionObserver]: Analyzing ICFG twisted.c [2021-11-21 00:43:13,247 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:43:13,247 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-21 00:43:13,298 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:43:13,306 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 00:43:13,307 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-21 00:43:13,323 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 19 states have internal predecessors, (25), 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 00:43:13,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 00:43:13,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:13,330 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 00:43:13,330 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:43:13,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:13,337 INFO L85 PathProgramCache]: Analyzing trace with hash 2538354, now seen corresponding path program 1 times [2021-11-21 00:43:13,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:13,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709079667] [2021-11-21 00:43:13,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:13,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:13,515 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 00:43:13,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:13,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709079667] [2021-11-21 00:43:13,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709079667] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:13,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:13,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:43:13,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841177089] [2021-11-21 00:43:13,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:13,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:13,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:13,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:13,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:13,577 INFO L87 Difference]: Start difference. First operand has 20 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 00:43:13,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:13,725 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2021-11-21 00:43:13,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:43:13,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-11-21 00:43:13,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:13,738 INFO L225 Difference]: With dead ends: 56 [2021-11-21 00:43:13,738 INFO L226 Difference]: Without dead ends: 35 [2021-11-21 00:43:13,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:43:13,763 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:13,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 32 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:43:13,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-21 00:43:13,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2021-11-21 00:43:13,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:13,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2021-11-21 00:43:13,833 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 4 [2021-11-21 00:43:13,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:13,834 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2021-11-21 00:43:13,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 00:43:13,838 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2021-11-21 00:43:13,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 00:43:13,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:13,839 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 00:43:13,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:43:13,840 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:43:13,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:13,844 INFO L85 PathProgramCache]: Analyzing trace with hash 78689019, now seen corresponding path program 1 times [2021-11-21 00:43:13,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:13,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125397463] [2021-11-21 00:43:13,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:13,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:13,948 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 00:43:13,948 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:13,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125397463] [2021-11-21 00:43:13,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125397463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:13,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:13,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:43:13,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721871847] [2021-11-21 00:43:13,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:13,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:13,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:13,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:13,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:13,961 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:14,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:14,044 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2021-11-21 00:43:14,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:14,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-21 00:43:14,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:14,047 INFO L225 Difference]: With dead ends: 27 [2021-11-21 00:43:14,047 INFO L226 Difference]: Without dead ends: 26 [2021-11-21 00:43:14,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:43:14,050 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:14,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 16 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:43:14,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-21 00:43:14,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-21 00:43:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.619047619047619) internal successors, (34), 25 states have internal predecessors, (34), 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 00:43:14,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2021-11-21 00:43:14,062 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 5 [2021-11-21 00:43:14,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:14,063 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2021-11-21 00:43:14,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:14,063 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2021-11-21 00:43:14,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:43:14,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:14,064 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:43:14,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:43:14,065 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:43:14,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:14,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1855654287, now seen corresponding path program 1 times [2021-11-21 00:43:14,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:14,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292419447] [2021-11-21 00:43:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:14,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:14,095 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 00:43:14,096 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:14,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292419447] [2021-11-21 00:43:14,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292419447] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:14,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:14,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-21 00:43:14,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055158015] [2021-11-21 00:43:14,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:14,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:43:14,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:14,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:43:14,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:43:14,120 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 00:43:14,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:14,163 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2021-11-21 00:43:14,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:43:14,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 00:43:14,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:14,165 INFO L225 Difference]: With dead ends: 39 [2021-11-21 00:43:14,165 INFO L226 Difference]: Without dead ends: 38 [2021-11-21 00:43:14,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 00:43:14,168 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 21 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 00:43:14,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 21 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:43:14,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-21 00:43:14,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2021-11-21 00:43:14,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 30 states have internal predecessors, (41), 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 00:43:14,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2021-11-21 00:43:14,180 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 6 [2021-11-21 00:43:14,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:14,180 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2021-11-21 00:43:14,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 00:43:14,181 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2021-11-21 00:43:14,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:43:14,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:14,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:43:14,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:43:14,183 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:43:14,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:14,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1855654237, now seen corresponding path program 1 times [2021-11-21 00:43:14,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:14,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525521276] [2021-11-21 00:43:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:14,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:14,216 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 00:43:14,217 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:14,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525521276] [2021-11-21 00:43:14,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525521276] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:14,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:14,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:43:14,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256147003] [2021-11-21 00:43:14,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:14,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:14,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:14,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:14,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:14,221 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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 00:43:14,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:14,280 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2021-11-21 00:43:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:43:14,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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 00:43:14,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:14,284 INFO L225 Difference]: With dead ends: 49 [2021-11-21 00:43:14,284 INFO L226 Difference]: Without dead ends: 48 [2021-11-21 00:43:14,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:43:14,287 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:14,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 37 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:43:14,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-21 00:43:14,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-11-21 00:43:14,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.542857142857143) internal successors, (54), 39 states have internal predecessors, (54), 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 00:43:14,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2021-11-21 00:43:14,320 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 6 [2021-11-21 00:43:14,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:14,321 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2021-11-21 00:43:14,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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 00:43:14,321 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2021-11-21 00:43:14,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 00:43:14,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:14,322 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:14,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:43:14,323 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:43:14,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:14,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1690707972, now seen corresponding path program 1 times [2021-11-21 00:43:14,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:14,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305745016] [2021-11-21 00:43:14,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:14,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:14,352 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 00:43:14,352 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:14,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305745016] [2021-11-21 00:43:14,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305745016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:14,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:14,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-21 00:43:14,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744479668] [2021-11-21 00:43:14,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:14,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:43:14,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:14,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:43:14,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:43:14,356 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:14,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:14,396 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2021-11-21 00:43:14,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:43:14,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-21 00:43:14,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:14,398 INFO L225 Difference]: With dead ends: 45 [2021-11-21 00:43:14,399 INFO L226 Difference]: Without dead ends: 42 [2021-11-21 00:43:14,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 00:43:14,401 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:14,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:43:14,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-21 00:43:14,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-11-21 00:43:14,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 38 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:14,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2021-11-21 00:43:14,413 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 7 [2021-11-21 00:43:14,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:14,414 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2021-11-21 00:43:14,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:14,414 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2021-11-21 00:43:14,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 00:43:14,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:14,415 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:14,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:43:14,416 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:43:14,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:14,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1690706434, now seen corresponding path program 1 times [2021-11-21 00:43:14,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:14,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594977067] [2021-11-21 00:43:14,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:14,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:14,456 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 00:43:14,456 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:14,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594977067] [2021-11-21 00:43:14,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594977067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:14,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:14,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:43:14,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048796850] [2021-11-21 00:43:14,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:14,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:14,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:14,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:14,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:14,460 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:14,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:14,523 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-11-21 00:43:14,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:14,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-21 00:43:14,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:14,528 INFO L225 Difference]: With dead ends: 39 [2021-11-21 00:43:14,528 INFO L226 Difference]: Without dead ends: 38 [2021-11-21 00:43:14,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:43:14,530 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:14,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 22 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:43:14,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-21 00:43:14,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-21 00:43:14,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 37 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:14,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2021-11-21 00:43:14,553 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 7 [2021-11-21 00:43:14,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:14,553 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2021-11-21 00:43:14,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:14,554 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2021-11-21 00:43:14,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:43:14,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:14,555 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:14,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:43:14,555 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:43:14,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:14,556 INFO L85 PathProgramCache]: Analyzing trace with hash -827531145, now seen corresponding path program 1 times [2021-11-21 00:43:14,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:14,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266040832] [2021-11-21 00:43:14,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:14,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:14,647 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:14,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266040832] [2021-11-21 00:43:14,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266040832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:43:14,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673189189] [2021-11-21 00:43:14,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:14,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:14,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:14,651 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:14,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:43:14,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:14,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:43:14,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:14,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:14,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673189189] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:43:14,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1924933012] [2021-11-21 00:43:14,877 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:43:14,877 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:43:14,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:43:14,890 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:43:14,890 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:43:16,147 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:43:16,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1924933012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:16,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:43:16,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4, 4] total 12 [2021-11-21 00:43:16,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988170170] [2021-11-21 00:43:16,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:16,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:43:16,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:16,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:43:16,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:43:16,713 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:17,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:17,181 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2021-11-21 00:43:17,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:43:17,182 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 00:43:17,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:17,183 INFO L225 Difference]: With dead ends: 69 [2021-11-21 00:43:17,183 INFO L226 Difference]: Without dead ends: 46 [2021-11-21 00:43:17,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:43:17,186 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:17,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 35 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:43:17,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-21 00:43:17,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2021-11-21 00:43:17,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 39 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:17,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-11-21 00:43:17,206 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 8 [2021-11-21 00:43:17,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:17,207 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-11-21 00:43:17,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:17,207 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-11-21 00:43:17,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 00:43:17,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:17,208 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:17,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 00:43:17,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 00:43:17,435 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:43:17,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:17,435 INFO L85 PathProgramCache]: Analyzing trace with hash -753827850, now seen corresponding path program 1 times [2021-11-21 00:43:17,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:17,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923150190] [2021-11-21 00:43:17,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:17,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:17,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:17,519 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:17,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923150190] [2021-11-21 00:43:17,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923150190] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:43:17,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176048547] [2021-11-21 00:43:17,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:17,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:17,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:17,531 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:17,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:43:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:17,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:43:17,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:17,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:17,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:17,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176048547] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:43:17,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1064652110] [2021-11-21 00:43:17,716 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 00:43:17,716 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:43:17,717 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:43:17,717 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:43:17,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:43:18,084 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:43:18,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1064652110] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:18,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:43:18,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3, 3] total 14 [2021-11-21 00:43:18,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997080514] [2021-11-21 00:43:18,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:18,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:43:18,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:18,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:43:18,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:43:18,242 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 00:43:18,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:18,343 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2021-11-21 00:43:18,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:43:18,344 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 10 [2021-11-21 00:43:18,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:18,345 INFO L225 Difference]: With dead ends: 75 [2021-11-21 00:43:18,345 INFO L226 Difference]: Without dead ends: 49 [2021-11-21 00:43:18,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:43:18,347 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:18,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 37 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:43:18,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-21 00:43:18,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-11-21 00:43:18,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 45 states have internal predecessors, (56), 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 00:43:18,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-11-21 00:43:18,356 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 10 [2021-11-21 00:43:18,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:18,357 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-11-21 00:43:18,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 00:43:18,357 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-11-21 00:43:18,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 00:43:18,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:18,358 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-21 00:43:18,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:18,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:18,572 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:43:18,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:18,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1133512047, now seen corresponding path program 1 times [2021-11-21 00:43:18,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:18,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605514923] [2021-11-21 00:43:18,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:18,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:18,627 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:18,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605514923] [2021-11-21 00:43:18,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605514923] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:43:18,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620372352] [2021-11-21 00:43:18,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:18,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:18,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:18,643 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:18,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:43:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:18,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:43:18,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:18,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:18,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:18,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:18,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620372352] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:43:18,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1652318355] [2021-11-21 00:43:18,766 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:43:18,766 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:43:18,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:43:18,767 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:43:18,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:43:20,736 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:43:21,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1652318355] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:21,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:43:21,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4, 4] total 13 [2021-11-21 00:43:21,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221380501] [2021-11-21 00:43:21,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:21,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:43:21,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:21,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:43:21,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:43:21,287 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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 00:43:22,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:22,028 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2021-11-21 00:43:22,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:43:22,028 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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 13 [2021-11-21 00:43:22,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:22,029 INFO L225 Difference]: With dead ends: 72 [2021-11-21 00:43:22,029 INFO L226 Difference]: Without dead ends: 47 [2021-11-21 00:43:22,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-21 00:43:22,033 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:22,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 34 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:43:22,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-21 00:43:22,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-11-21 00:43:22,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 states have internal predecessors, (53), 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 00:43:22,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-11-21 00:43:22,044 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 13 [2021-11-21 00:43:22,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:22,045 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-11-21 00:43:22,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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 00:43:22,045 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-11-21 00:43:22,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 00:43:22,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:22,047 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:22,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:22,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:22,274 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:43:22,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:22,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1948716347, now seen corresponding path program 1 times [2021-11-21 00:43:22,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:22,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292675233] [2021-11-21 00:43:22,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:22,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:22,380 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:22,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292675233] [2021-11-21 00:43:22,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292675233] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:43:22,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10937846] [2021-11-21 00:43:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:22,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:22,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:22,382 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:22,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:43:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:22,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:43:22,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:22,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:22,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10937846] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:43:22,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [295034832] [2021-11-21 00:43:22,791 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:43:22,792 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:43:22,792 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:43:22,792 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:43:22,793 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:43:24,619 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:43:25,387 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:43:25,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:43:25,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2021-11-21 00:43:25,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726905613] [2021-11-21 00:43:25,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:43:25,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-21 00:43:25,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:25,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-21 00:43:25,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-11-21 00:43:25,390 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 17 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 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 00:43:25,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:25,816 INFO L93 Difference]: Finished difference Result 136 states and 164 transitions. [2021-11-21 00:43:25,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 00:43:25,817 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 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 14 [2021-11-21 00:43:25,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:25,819 INFO L225 Difference]: With dead ends: 136 [2021-11-21 00:43:25,819 INFO L226 Difference]: Without dead ends: 133 [2021-11-21 00:43:25,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=344, Invalid=1462, Unknown=0, NotChecked=0, Total=1806 [2021-11-21 00:43:25,821 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 154 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:25,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 33 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:43:25,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-21 00:43:25,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 96. [2021-11-21 00:43:25,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.3043478260869565) internal successors, (120), 95 states have internal predecessors, (120), 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 00:43:25,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 120 transitions. [2021-11-21 00:43:25,844 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 120 transitions. Word has length 14 [2021-11-21 00:43:25,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:25,844 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 120 transitions. [2021-11-21 00:43:25,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 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 00:43:25,845 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 120 transitions. [2021-11-21 00:43:25,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 00:43:25,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:25,846 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:25,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:26,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 00:43:26,079 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:43:26,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:26,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1948716397, now seen corresponding path program 1 times [2021-11-21 00:43:26,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:26,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23323864] [2021-11-21 00:43:26,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:26,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:26,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:43:26,120 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:26,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23323864] [2021-11-21 00:43:26,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23323864] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:43:26,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280317674] [2021-11-21 00:43:26,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:26,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:26,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:26,122 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:26,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:43:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:26,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:43:26,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:43:26,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:26,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:43:26,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280317674] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:43:26,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1903542437] [2021-11-21 00:43:26,284 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-21 00:43:26,284 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:43:26,284 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:43:26,285 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:43:26,285 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:43:28,181 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:43:28,822 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:43:28,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:43:28,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-21 00:43:28,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297628631] [2021-11-21 00:43:28,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:43:28,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:43:28,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:28,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:43:28,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-11-21 00:43:28,824 INFO L87 Difference]: Start difference. First operand 96 states and 120 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 00:43:28,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:28,964 INFO L93 Difference]: Finished difference Result 166 states and 212 transitions. [2021-11-21 00:43:28,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:43:28,965 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 14 [2021-11-21 00:43:28,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:28,967 INFO L225 Difference]: With dead ends: 166 [2021-11-21 00:43:28,967 INFO L226 Difference]: Without dead ends: 165 [2021-11-21 00:43:28,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-11-21 00:43:28,970 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:28,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 82 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:43:28,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-21 00:43:29,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 145. [2021-11-21 00:43:29,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 141 states have (on average 1.3617021276595744) internal successors, (192), 144 states have internal predecessors, (192), 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 00:43:29,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-11-21 00:43:29,014 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 14 [2021-11-21 00:43:29,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:29,015 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-11-21 00:43:29,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 00:43:29,015 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-11-21 00:43:29,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 00:43:29,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:29,019 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:29,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:29,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 00:43:29,235 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:43:29,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:29,235 INFO L85 PathProgramCache]: Analyzing trace with hash 280664690, now seen corresponding path program 1 times [2021-11-21 00:43:29,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:29,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379424013] [2021-11-21 00:43:29,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:29,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:29,285 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:29,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379424013] [2021-11-21 00:43:29,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379424013] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:43:29,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915650675] [2021-11-21 00:43:29,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:29,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:29,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:29,287 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:29,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:43:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:29,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:43:29,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:29,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:29,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:43:29,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915650675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:29,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:43:29,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2021-11-21 00:43:29,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275937446] [2021-11-21 00:43:29,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:29,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:43:29,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:29,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:43:29,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:43:29,469 INFO L87 Difference]: Start difference. First operand 145 states and 192 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:29,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:29,648 INFO L93 Difference]: Finished difference Result 146 states and 192 transitions. [2021-11-21 00:43:29,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 00:43:29,649 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-21 00:43:29,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:29,652 INFO L225 Difference]: With dead ends: 146 [2021-11-21 00:43:29,652 INFO L226 Difference]: Without dead ends: 143 [2021-11-21 00:43:29,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:43:29,653 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 43 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:29,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 27 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:43:29,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-21 00:43:29,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2021-11-21 00:43:29,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 138 states have (on average 1.318840579710145) internal successors, (182), 140 states have internal predecessors, (182), 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 00:43:29,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 182 transitions. [2021-11-21 00:43:29,694 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 182 transitions. Word has length 15 [2021-11-21 00:43:29,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:29,695 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 182 transitions. [2021-11-21 00:43:29,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:29,695 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 182 transitions. [2021-11-21 00:43:29,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 00:43:29,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:29,700 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:29,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:29,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-21 00:43:29,919 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:43:29,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:29,920 INFO L85 PathProgramCache]: Analyzing trace with hash 280701081, now seen corresponding path program 1 times [2021-11-21 00:43:29,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:29,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519611083] [2021-11-21 00:43:29,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:29,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:43:29,947 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:29,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519611083] [2021-11-21 00:43:29,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519611083] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:29,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:29,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:43:29,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728541311] [2021-11-21 00:43:29,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:29,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:43:29,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:29,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:43:29,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:43:29,949 INFO L87 Difference]: Start difference. First operand 141 states and 182 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:29,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:29,997 INFO L93 Difference]: Finished difference Result 241 states and 316 transitions. [2021-11-21 00:43:29,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:43:29,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-21 00:43:29,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:29,999 INFO L225 Difference]: With dead ends: 241 [2021-11-21 00:43:29,999 INFO L226 Difference]: Without dead ends: 174 [2021-11-21 00:43:30,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 00:43:30,001 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:30,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 26 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:43:30,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-21 00:43:30,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2021-11-21 00:43:30,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 168 states have (on average 1.2619047619047619) internal successors, (212), 170 states have internal predecessors, (212), 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 00:43:30,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 212 transitions. [2021-11-21 00:43:30,018 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 212 transitions. Word has length 15 [2021-11-21 00:43:30,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:30,018 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 212 transitions. [2021-11-21 00:43:30,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:30,019 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 212 transitions. [2021-11-21 00:43:30,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 00:43:30,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:30,020 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:30,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 00:43:30,020 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:43:30,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:30,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1677597891, now seen corresponding path program 1 times [2021-11-21 00:43:30,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:30,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952950718] [2021-11-21 00:43:30,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:30,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:30,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:30,083 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:30,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952950718] [2021-11-21 00:43:30,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952950718] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:43:30,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238779389] [2021-11-21 00:43:30,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:30,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:30,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:30,085 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:30,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:43:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:30,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:43:30,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:30,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:30,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238779389] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:43:30,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [304018794] [2021-11-21 00:43:30,248 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-21 00:43:30,248 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:43:30,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:43:30,249 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:43:30,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:43:32,790 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:43:33,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [304018794] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:33,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:43:33,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 6, 6] total 19 [2021-11-21 00:43:33,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963514900] [2021-11-21 00:43:33,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:33,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:43:33,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:33,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:43:33,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-11-21 00:43:33,313 INFO L87 Difference]: Start difference. First operand 171 states and 212 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:33,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:33,903 INFO L93 Difference]: Finished difference Result 283 states and 362 transitions. [2021-11-21 00:43:33,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:43:33,904 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-21 00:43:33,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:33,905 INFO L225 Difference]: With dead ends: 283 [2021-11-21 00:43:33,906 INFO L226 Difference]: Without dead ends: 229 [2021-11-21 00:43:33,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-11-21 00:43:33,907 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:33,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 53 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:43:33,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-21 00:43:33,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 170. [2021-11-21 00:43:33,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 168 states have (on average 1.2202380952380953) internal successors, (205), 169 states have internal predecessors, (205), 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 00:43:33,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 205 transitions. [2021-11-21 00:43:33,930 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 205 transitions. Word has length 18 [2021-11-21 00:43:33,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:33,930 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 205 transitions. [2021-11-21 00:43:33,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:33,931 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 205 transitions. [2021-11-21 00:43:33,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 00:43:33,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:33,932 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:33,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:34,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:34,134 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:43:34,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:34,135 INFO L85 PathProgramCache]: Analyzing trace with hash -789615675, now seen corresponding path program 2 times [2021-11-21 00:43:34,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:34,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918063425] [2021-11-21 00:43:34,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:34,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:34,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:34,216 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:34,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918063425] [2021-11-21 00:43:34,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918063425] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:43:34,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987144862] [2021-11-21 00:43:34,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:43:34,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:34,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:34,223 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:34,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:43:34,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 00:43:34,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:43:34,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 00:43:34,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:34,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:34,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987144862] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:43:34,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1230956621] [2021-11-21 00:43:34,635 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:43:34,635 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:43:34,636 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:43:34,636 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:43:34,636 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:43:36,051 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:43:36,570 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:43:36,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:43:36,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2021-11-21 00:43:36,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891009054] [2021-11-21 00:43:36,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:43:36,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-21 00:43:36,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:36,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-21 00:43:36,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1278, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 00:43:36,572 INFO L87 Difference]: Start difference. First operand 170 states and 205 transitions. Second operand has 29 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:37,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:37,077 INFO L93 Difference]: Finished difference Result 276 states and 330 transitions. [2021-11-21 00:43:37,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-21 00:43:37,078 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-21 00:43:37,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:37,082 INFO L225 Difference]: With dead ends: 276 [2021-11-21 00:43:37,083 INFO L226 Difference]: Without dead ends: 269 [2021-11-21 00:43:37,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=651, Invalid=2541, Unknown=0, NotChecked=0, Total=3192 [2021-11-21 00:43:37,095 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 206 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:37,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 56 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:43:37,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-21 00:43:37,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 242. [2021-11-21 00:43:37,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 240 states have (on average 1.1958333333333333) internal successors, (287), 241 states have internal predecessors, (287), 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 00:43:37,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 287 transitions. [2021-11-21 00:43:37,129 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 287 transitions. Word has length 22 [2021-11-21 00:43:37,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:37,129 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 287 transitions. [2021-11-21 00:43:37,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:37,130 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 287 transitions. [2021-11-21 00:43:37,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 00:43:37,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:37,131 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:37,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:37,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-21 00:43:37,350 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:43:37,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:37,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1390090171, now seen corresponding path program 3 times [2021-11-21 00:43:37,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:37,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722230757] [2021-11-21 00:43:37,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:37,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:37,451 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:37,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722230757] [2021-11-21 00:43:37,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722230757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:43:37,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713886051] [2021-11-21 00:43:37,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:43:37,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:37,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:37,453 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:37,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:43:37,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:43:37,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:43:37,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 00:43:37,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:37,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:37,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:37,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713886051] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:43:37,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2146461276] [2021-11-21 00:43:37,867 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:43:37,867 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:43:37,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:43:37,868 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:43:37,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:43:39,540 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:43:40,142 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:43:40,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:43:40,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2021-11-21 00:43:40,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97263306] [2021-11-21 00:43:40,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:43:40,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-21 00:43:40,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:40,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-21 00:43:40,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1269, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 00:43:40,145 INFO L87 Difference]: Start difference. First operand 242 states and 287 transitions. Second operand has 29 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:40,609 INFO L93 Difference]: Finished difference Result 353 states and 420 transitions. [2021-11-21 00:43:40,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-21 00:43:40,610 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-21 00:43:40,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:40,613 INFO L225 Difference]: With dead ends: 353 [2021-11-21 00:43:40,613 INFO L226 Difference]: Without dead ends: 345 [2021-11-21 00:43:40,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=624, Invalid=2682, Unknown=0, NotChecked=0, Total=3306 [2021-11-21 00:43:40,616 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 163 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:40,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 68 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:43:40,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-11-21 00:43:40,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 252. [2021-11-21 00:43:40,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 250 states have (on average 1.204) internal successors, (301), 251 states have internal predecessors, (301), 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 00:43:40,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 301 transitions. [2021-11-21 00:43:40,646 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 301 transitions. Word has length 22 [2021-11-21 00:43:40,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:40,647 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 301 transitions. [2021-11-21 00:43:40,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:40,647 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 301 transitions. [2021-11-21 00:43:40,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 00:43:40,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:40,648 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:40,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:40,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-21 00:43:40,854 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:43:40,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:40,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1292293252, now seen corresponding path program 2 times [2021-11-21 00:43:40,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:40,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458370374] [2021-11-21 00:43:40,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:40,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:43:40,973 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:40,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458370374] [2021-11-21 00:43:40,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458370374] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:43:40,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329626764] [2021-11-21 00:43:40,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:43:40,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:40,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:40,982 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:41,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 00:43:41,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-21 00:43:41,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:43:41,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:43:41,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 00:43:41,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:41,163 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 00:43:41,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329626764] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:43:41,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [381193801] [2021-11-21 00:43:41,165 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-21 00:43:41,165 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:43:41,165 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:43:41,166 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:43:41,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:43:42,645 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:43:43,309 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:43:43,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:43:43,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 2, 2] total 12 [2021-11-21 00:43:43,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511248626] [2021-11-21 00:43:43,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:43:43,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 00:43:43,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:43,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 00:43:43,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-11-21 00:43:43,311 INFO L87 Difference]: Start difference. First operand 252 states and 301 transitions. Second operand has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 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 00:43:43,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:43,522 INFO L93 Difference]: Finished difference Result 327 states and 385 transitions. [2021-11-21 00:43:43,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 00:43:43,523 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 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 26 [2021-11-21 00:43:43,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:43,525 INFO L225 Difference]: With dead ends: 327 [2021-11-21 00:43:43,525 INFO L226 Difference]: Without dead ends: 326 [2021-11-21 00:43:43,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2021-11-21 00:43:43,527 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 124 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:43,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 90 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:43:43,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-11-21 00:43:43,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 174. [2021-11-21 00:43:43,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.1618497109826589) internal successors, (201), 173 states have internal predecessors, (201), 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 00:43:43,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 201 transitions. [2021-11-21 00:43:43,552 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 201 transitions. Word has length 26 [2021-11-21 00:43:43,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:43,552 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 201 transitions. [2021-11-21 00:43:43,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 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 00:43:43,552 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 201 transitions. [2021-11-21 00:43:43,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-21 00:43:43,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:43,554 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:43,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:43,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-21 00:43:43,756 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:43:43,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:43,756 INFO L85 PathProgramCache]: Analyzing trace with hash -685928817, now seen corresponding path program 4 times [2021-11-21 00:43:43,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:43,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857166828] [2021-11-21 00:43:43,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:43,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:43,907 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:43,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857166828] [2021-11-21 00:43:43,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857166828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:43:43,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104949642] [2021-11-21 00:43:43,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:43:43,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:43,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:43,908 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:43,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 00:43:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:43,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 00:43:43,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:44,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:44,459 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:44,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104949642] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:43:44,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1861728861] [2021-11-21 00:43:44,462 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:43:44,462 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:43:44,462 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:43:44,463 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:43:44,463 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:43:45,725 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:43:46,234 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:43:46,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:43:46,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2021-11-21 00:43:46,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913342780] [2021-11-21 00:43:46,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:43:46,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-21 00:43:46,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:46,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-21 00:43:46,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=2178, Unknown=0, NotChecked=0, Total=2652 [2021-11-21 00:43:46,236 INFO L87 Difference]: Start difference. First operand 174 states and 201 transitions. Second operand has 41 states, 40 states have (on average 2.25) internal successors, (90), 40 states have internal predecessors, (90), 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 00:43:46,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:46,967 INFO L93 Difference]: Finished difference Result 358 states and 409 transitions. [2021-11-21 00:43:46,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-21 00:43:46,969 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.25) internal successors, (90), 40 states have internal predecessors, (90), 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 30 [2021-11-21 00:43:46,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:46,972 INFO L225 Difference]: With dead ends: 358 [2021-11-21 00:43:46,972 INFO L226 Difference]: Without dead ends: 350 [2021-11-21 00:43:46,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1261, Invalid=4901, Unknown=0, NotChecked=0, Total=6162 [2021-11-21 00:43:46,975 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 364 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:46,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 70 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:43:46,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-11-21 00:43:47,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 200. [2021-11-21 00:43:47,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.1407035175879396) internal successors, (227), 199 states have internal predecessors, (227), 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 00:43:47,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 227 transitions. [2021-11-21 00:43:47,013 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 227 transitions. Word has length 30 [2021-11-21 00:43:47,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:47,014 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 227 transitions. [2021-11-21 00:43:47,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.25) internal successors, (90), 40 states have internal predecessors, (90), 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 00:43:47,014 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 227 transitions. [2021-11-21 00:43:47,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-21 00:43:47,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:47,016 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-21 00:43:47,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:47,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-21 00:43:47,230 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:43:47,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:47,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1482474188, now seen corresponding path program 1 times [2021-11-21 00:43:47,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:47,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047171231] [2021-11-21 00:43:47,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:47,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:47,369 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:47,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047171231] [2021-11-21 00:43:47,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047171231] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:43:47,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471523861] [2021-11-21 00:43:47,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:47,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:47,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:47,371 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:47,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 00:43:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:47,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 00:43:47,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:47,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:48,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471523861] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:43:48,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1965520360] [2021-11-21 00:43:48,167 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:43:48,168 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:43:48,168 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:43:48,168 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:43:48,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:43:53,151 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:43:53,824 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:43:53,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:43:53,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2021-11-21 00:43:53,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656245299] [2021-11-21 00:43:53,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:43:53,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-21 00:43:53,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:53,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-21 00:43:53,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=2171, Unknown=0, NotChecked=0, Total=2550 [2021-11-21 00:43:53,826 INFO L87 Difference]: Start difference. First operand 200 states and 227 transitions. Second operand has 41 states, 40 states have (on average 2.475) internal successors, (99), 40 states have internal predecessors, (99), 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 00:43:54,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:54,686 INFO L93 Difference]: Finished difference Result 429 states and 485 transitions. [2021-11-21 00:43:54,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-21 00:43:54,687 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.475) internal successors, (99), 40 states have internal predecessors, (99), 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 33 [2021-11-21 00:43:54,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:54,689 INFO L225 Difference]: With dead ends: 429 [2021-11-21 00:43:54,689 INFO L226 Difference]: Without dead ends: 422 [2021-11-21 00:43:54,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1119, Invalid=5201, Unknown=0, NotChecked=0, Total=6320 [2021-11-21 00:43:54,692 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 326 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:54,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 54 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:43:54,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-11-21 00:43:54,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 224. [2021-11-21 00:43:54,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.1524663677130045) internal successors, (257), 223 states have internal predecessors, (257), 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 00:43:54,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 257 transitions. [2021-11-21 00:43:54,729 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 257 transitions. Word has length 33 [2021-11-21 00:43:54,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:54,730 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 257 transitions. [2021-11-21 00:43:54,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.475) internal successors, (99), 40 states have internal predecessors, (99), 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 00:43:54,730 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 257 transitions. [2021-11-21 00:43:54,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-21 00:43:54,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:54,732 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:54,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:54,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:54,942 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:43:54,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:54,943 INFO L85 PathProgramCache]: Analyzing trace with hash -2106323360, now seen corresponding path program 1 times [2021-11-21 00:43:54,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:54,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955811493] [2021-11-21 00:43:54,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:54,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:55,182 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:55,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955811493] [2021-11-21 00:43:55,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955811493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:43:55,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501126383] [2021-11-21 00:43:55,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:55,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:55,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:55,184 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:55,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 00:43:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:55,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 00:43:55,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:55,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:56,215 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:56,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501126383] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:43:56,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [543120193] [2021-11-21 00:43:56,217 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:43:56,217 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:43:56,218 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:43:56,218 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:43:56,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:44:01,867 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:44:02,657 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:44:02,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:44:02,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2021-11-21 00:44:02,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193460635] [2021-11-21 00:44:02,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:44:02,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-21 00:44:02,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:44:02,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-21 00:44:02,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=704, Invalid=3852, Unknown=0, NotChecked=0, Total=4556 [2021-11-21 00:44:02,660 INFO L87 Difference]: Start difference. First operand 224 states and 257 transitions. Second operand has 59 states, 58 states have (on average 2.2758620689655173) internal successors, (132), 58 states have internal predecessors, (132), 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 00:44:04,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:44:04,093 INFO L93 Difference]: Finished difference Result 637 states and 721 transitions. [2021-11-21 00:44:04,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-21 00:44:04,094 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 2.2758620689655173) internal successors, (132), 58 states have internal predecessors, (132), 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 44 [2021-11-21 00:44:04,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:44:04,098 INFO L225 Difference]: With dead ends: 637 [2021-11-21 00:44:04,099 INFO L226 Difference]: Without dead ends: 627 [2021-11-21 00:44:04,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 76 SyntacticMatches, 7 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5228 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2390, Invalid=9820, Unknown=0, NotChecked=0, Total=12210 [2021-11-21 00:44:04,105 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 477 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:44:04,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 79 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:44:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-11-21 00:44:04,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 327. [2021-11-21 00:44:04,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.156441717791411) internal successors, (377), 326 states have internal predecessors, (377), 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 00:44:04,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 377 transitions. [2021-11-21 00:44:04,173 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 377 transitions. Word has length 44 [2021-11-21 00:44:04,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:44:04,173 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 377 transitions. [2021-11-21 00:44:04,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 2.2758620689655173) internal successors, (132), 58 states have internal predecessors, (132), 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 00:44:04,174 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 377 transitions. [2021-11-21 00:44:04,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-21 00:44:04,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:44:04,175 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1] [2021-11-21 00:44:04,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:04,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:44:04,377 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:44:04,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:44:04,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1193896251, now seen corresponding path program 2 times [2021-11-21 00:44:04,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:44:04,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201681124] [2021-11-21 00:44:04,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:04,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:44:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:04,623 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:44:04,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201681124] [2021-11-21 00:44:04,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201681124] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:44:04,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432792905] [2021-11-21 00:44:04,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:44:04,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:44:04,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:44:04,625 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:44:04,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 00:44:04,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:44:04,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:44:04,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 00:44:04,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 30 proven. 41 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 00:44:04,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:05,435 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 57 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 00:44:05,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432792905] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:44:05,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1882712075] [2021-11-21 00:44:05,437 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:44:05,437 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:44:05,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:44:05,438 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:44:05,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:44:09,734 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:44:10,600 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:44:10,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:44:10,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8, 11] total 38 [2021-11-21 00:44:10,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180773182] [2021-11-21 00:44:10,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:44:10,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-21 00:44:10,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:44:10,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-21 00:44:10,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=1950, Unknown=0, NotChecked=0, Total=2256 [2021-11-21 00:44:10,603 INFO L87 Difference]: Start difference. First operand 327 states and 377 transitions. Second operand has 38 states, 38 states have (on average 2.973684210526316) internal successors, (113), 38 states have internal predecessors, (113), 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 00:44:12,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:44:12,078 INFO L93 Difference]: Finished difference Result 734 states and 835 transitions. [2021-11-21 00:44:12,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-21 00:44:12,078 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.973684210526316) internal successors, (113), 38 states have internal predecessors, (113), 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 45 [2021-11-21 00:44:12,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:44:12,081 INFO L225 Difference]: With dead ends: 734 [2021-11-21 00:44:12,081 INFO L226 Difference]: Without dead ends: 419 [2021-11-21 00:44:12,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1300, Invalid=6356, Unknown=0, NotChecked=0, Total=7656 [2021-11-21 00:44:12,090 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 403 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:44:12,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 77 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:44:12,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-11-21 00:44:12,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 241. [2021-11-21 00:44:12,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.1333333333333333) internal successors, (272), 240 states have internal predecessors, (272), 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 00:44:12,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 272 transitions. [2021-11-21 00:44:12,161 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 272 transitions. Word has length 45 [2021-11-21 00:44:12,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:44:12,162 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 272 transitions. [2021-11-21 00:44:12,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.973684210526316) internal successors, (113), 38 states have internal predecessors, (113), 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 00:44:12,162 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 272 transitions. [2021-11-21 00:44:12,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 00:44:12,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:44:12,165 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2021-11-21 00:44:12,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:12,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:44:12,378 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:44:12,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:44:12,379 INFO L85 PathProgramCache]: Analyzing trace with hash 951903332, now seen corresponding path program 1 times [2021-11-21 00:44:12,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:44:12,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346541662] [2021-11-21 00:44:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:12,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:44:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:12,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:44:12,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346541662] [2021-11-21 00:44:12,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346541662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:44:12,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007772243] [2021-11-21 00:44:12,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:12,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:44:12,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:44:12,635 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:44:12,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-21 00:44:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:12,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 00:44:12,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:13,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:13,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007772243] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:44:13,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [440285006] [2021-11-21 00:44:13,730 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:44:13,731 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:44:13,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:44:13,731 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:44:13,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:44:19,135 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:44:19,740 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:44:19,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:44:19,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2021-11-21 00:44:19,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199859531] [2021-11-21 00:44:19,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:44:19,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-21 00:44:19,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:44:19,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-21 00:44:19,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=704, Invalid=3852, Unknown=0, NotChecked=0, Total=4556 [2021-11-21 00:44:19,742 INFO L87 Difference]: Start difference. First operand 241 states and 272 transitions. Second operand has 59 states, 58 states have (on average 2.4827586206896552) internal successors, (144), 58 states have internal predecessors, (144), 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 00:44:21,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:44:21,348 INFO L93 Difference]: Finished difference Result 460 states and 521 transitions. [2021-11-21 00:44:21,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-21 00:44:21,348 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 2.4827586206896552) internal successors, (144), 58 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-21 00:44:21,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:44:21,351 INFO L225 Difference]: With dead ends: 460 [2021-11-21 00:44:21,351 INFO L226 Difference]: Without dead ends: 449 [2021-11-21 00:44:21,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4977 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2371, Invalid=10739, Unknown=0, NotChecked=0, Total=13110 [2021-11-21 00:44:21,354 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 444 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:44:21,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 83 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:44:21,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-11-21 00:44:21,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 291. [2021-11-21 00:44:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.1344827586206896) internal successors, (329), 290 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:21,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 329 transitions. [2021-11-21 00:44:21,411 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 329 transitions. Word has length 48 [2021-11-21 00:44:21,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:44:21,411 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 329 transitions. [2021-11-21 00:44:21,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 2.4827586206896552) internal successors, (144), 58 states have internal predecessors, (144), 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 00:44:21,412 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 329 transitions. [2021-11-21 00:44:21,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-21 00:44:21,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:44:21,414 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-11-21 00:44:21,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-21 00:44:21,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-21 00:44:21,616 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:44:21,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:44:21,617 INFO L85 PathProgramCache]: Analyzing trace with hash 164394038, now seen corresponding path program 2 times [2021-11-21 00:44:21,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:44:21,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487370050] [2021-11-21 00:44:21,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:21,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:44:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:22,063 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:44:22,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487370050] [2021-11-21 00:44:22,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487370050] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:44:22,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898205363] [2021-11-21 00:44:22,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:44:22,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:44:22,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:44:22,065 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:44:22,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 00:44:22,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-21 00:44:22,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:44:22,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-21 00:44:22,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:22,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:23,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898205363] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:44:23,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [658628359] [2021-11-21 00:44:23,820 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:44:23,821 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:44:23,821 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:44:23,821 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:44:23,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:44:29,501 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:44:30,676 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:44:30,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:44:30,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2021-11-21 00:44:30,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472846047] [2021-11-21 00:44:30,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:44:30,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-21 00:44:30,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:44:30,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-21 00:44:30,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1304, Invalid=7068, Unknown=0, NotChecked=0, Total=8372 [2021-11-21 00:44:30,681 INFO L87 Difference]: Start difference. First operand 291 states and 329 transitions. Second operand has 83 states, 82 states have (on average 2.268292682926829) internal successors, (186), 82 states have internal predecessors, (186), 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 00:44:33,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:44:33,108 INFO L93 Difference]: Finished difference Result 578 states and 655 transitions. [2021-11-21 00:44:33,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-21 00:44:33,109 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 2.268292682926829) internal successors, (186), 82 states have internal predecessors, (186), 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 62 [2021-11-21 00:44:33,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:44:33,113 INFO L225 Difference]: With dead ends: 578 [2021-11-21 00:44:33,113 INFO L226 Difference]: Without dead ends: 566 [2021-11-21 00:44:33,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9979 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4534, Invalid=18116, Unknown=0, NotChecked=0, Total=22650 [2021-11-21 00:44:33,117 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 746 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:44:33,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 112 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 00:44:33,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-21 00:44:33,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 339. [2021-11-21 00:44:33,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.1301775147928994) internal successors, (382), 338 states have internal predecessors, (382), 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 00:44:33,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 382 transitions. [2021-11-21 00:44:33,203 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 382 transitions. Word has length 62 [2021-11-21 00:44:33,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:44:33,203 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 382 transitions. [2021-11-21 00:44:33,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 2.268292682926829) internal successors, (186), 82 states have internal predecessors, (186), 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 00:44:33,204 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 382 transitions. [2021-11-21 00:44:33,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-21 00:44:33,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:44:33,206 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:44:33,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:33,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-21 00:44:33,414 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:44:33,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:44:33,415 INFO L85 PathProgramCache]: Analyzing trace with hash 476501520, now seen corresponding path program 5 times [2021-11-21 00:44:33,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:44:33,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186740350] [2021-11-21 00:44:33,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:33,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:44:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:34,130 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:44:34,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186740350] [2021-11-21 00:44:34,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186740350] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:44:34,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369075169] [2021-11-21 00:44:34,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:44:34,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:44:34,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:44:34,132 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:44:34,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-21 00:44:34,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-11-21 00:44:34,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:44:34,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-21 00:44:34,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:35,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:37,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369075169] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:44:37,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [167014384] [2021-11-21 00:44:37,169 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:44:37,169 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:44:37,169 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:44:37,169 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:44:37,169 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:44:38,519 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:44:39,348 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:44:39,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:44:39,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 117 [2021-11-21 00:44:39,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342979339] [2021-11-21 00:44:39,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:44:39,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-11-21 00:44:39,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:44:39,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-11-21 00:44:39,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3402, Invalid=13368, Unknown=0, NotChecked=0, Total=16770 [2021-11-21 00:44:39,352 INFO L87 Difference]: Start difference. First operand 339 states and 382 transitions. Second operand has 119 states, 118 states have (on average 2.0847457627118646) internal successors, (246), 118 states have internal predecessors, (246), 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 00:44:42,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:44:42,855 INFO L93 Difference]: Finished difference Result 869 states and 985 transitions. [2021-11-21 00:44:42,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-11-21 00:44:42,856 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 118 states have (on average 2.0847457627118646) internal successors, (246), 118 states have internal predecessors, (246), 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 82 [2021-11-21 00:44:42,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:44:42,860 INFO L225 Difference]: With dead ends: 869 [2021-11-21 00:44:42,861 INFO L226 Difference]: Without dead ends: 847 [2021-11-21 00:44:42,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17207 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=10131, Invalid=32511, Unknown=0, NotChecked=0, Total=42642 [2021-11-21 00:44:42,866 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 813 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:44:42,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [813 Valid, 158 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 00:44:42,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-11-21 00:44:43,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 555. [2021-11-21 00:44:43,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.1137184115523466) internal successors, (617), 554 states have internal predecessors, (617), 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 00:44:43,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 617 transitions. [2021-11-21 00:44:43,026 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 617 transitions. Word has length 82 [2021-11-21 00:44:43,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:44:43,027 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 617 transitions. [2021-11-21 00:44:43,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 118 states have (on average 2.0847457627118646) internal successors, (246), 118 states have internal predecessors, (246), 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 00:44:43,027 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 617 transitions. [2021-11-21 00:44:43,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-21 00:44:43,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:44:43,030 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 7, 7, 7, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2021-11-21 00:44:43,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:43,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:44:43,266 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:44:43,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:44:43,267 INFO L85 PathProgramCache]: Analyzing trace with hash -15011631, now seen corresponding path program 3 times [2021-11-21 00:44:43,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:44:43,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263861778] [2021-11-21 00:44:43,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:43,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:44:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:43,918 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:43,918 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:44:43,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263861778] [2021-11-21 00:44:43,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263861778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:44:43,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080733078] [2021-11-21 00:44:43,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:44:43,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:44:43,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:44:43,920 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:44:43,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-21 00:44:43,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:44:43,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:44:43,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-21 00:44:43,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:45,226 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:45,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:46,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080733078] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:44:46,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [150221489] [2021-11-21 00:44:46,635 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:44:46,635 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:44:46,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:44:46,635 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:44:46,636 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:44:52,645 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:44:54,191 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:44:54,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:44:54,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 111 [2021-11-21 00:44:54,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131347608] [2021-11-21 00:44:54,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:44:54,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2021-11-21 00:44:54,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:44:54,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-11-21 00:44:54,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2338, Invalid=12424, Unknown=0, NotChecked=0, Total=14762 [2021-11-21 00:44:54,194 INFO L87 Difference]: Start difference. First operand 555 states and 617 transitions. Second operand has 113 states, 112 states have (on average 2.25) internal successors, (252), 112 states have internal predecessors, (252), 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 00:44:57,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:44:57,826 INFO L93 Difference]: Finished difference Result 1326 states and 1465 transitions. [2021-11-21 00:44:57,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-11-21 00:44:57,827 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 112 states have (on average 2.25) internal successors, (252), 112 states have internal predecessors, (252), 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 84 [2021-11-21 00:44:57,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:44:57,835 INFO L225 Difference]: With dead ends: 1326 [2021-11-21 00:44:57,835 INFO L226 Difference]: Without dead ends: 1310 [2021-11-21 00:44:57,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 155 SyntacticMatches, 12 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18642 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=8459, Invalid=33361, Unknown=0, NotChecked=0, Total=41820 [2021-11-21 00:44:57,839 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 945 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:44:57,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [945 Valid, 139 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 00:44:57,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-11-21 00:44:58,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 584. [2021-11-21 00:44:58,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 1.1200686106346485) internal successors, (653), 583 states have internal predecessors, (653), 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 00:44:58,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 653 transitions. [2021-11-21 00:44:58,067 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 653 transitions. Word has length 84 [2021-11-21 00:44:58,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:44:58,067 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 653 transitions. [2021-11-21 00:44:58,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 112 states have (on average 2.25) internal successors, (252), 112 states have internal predecessors, (252), 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 00:44:58,067 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 653 transitions. [2021-11-21 00:44:58,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-21 00:44:58,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:44:58,069 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1] [2021-11-21 00:44:58,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:58,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-21 00:44:58,270 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:44:58,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:44:58,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1919874278, now seen corresponding path program 3 times [2021-11-21 00:44:58,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:44:58,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946529299] [2021-11-21 00:44:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:58,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:44:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 472 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:59,144 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:44:59,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946529299] [2021-11-21 00:44:59,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946529299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:44:59,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539564817] [2021-11-21 00:44:59,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:44:59,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:44:59,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:44:59,146 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:44:59,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-21 00:44:59,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:44:59,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:44:59,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-21 00:44:59,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:45:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 472 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:45:00,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:45:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 472 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:45:02,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539564817] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:45:02,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1688376250] [2021-11-21 00:45:02,354 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:45:02,354 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:45:02,355 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:45:02,355 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:45:02,355 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:45:07,269 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:45:08,189 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:45:08,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:45:08,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 123 [2021-11-21 00:45:08,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967968010] [2021-11-21 00:45:08,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:45:08,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2021-11-21 00:45:08,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:45:08,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-11-21 00:45:08,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2935, Invalid=15155, Unknown=0, NotChecked=0, Total=18090 [2021-11-21 00:45:08,192 INFO L87 Difference]: Start difference. First operand 584 states and 653 transitions. Second operand has 125 states, 124 states have (on average 2.346774193548387) internal successors, (291), 124 states have internal predecessors, (291), 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 00:45:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:45:12,593 INFO L93 Difference]: Finished difference Result 1211 states and 1351 transitions. [2021-11-21 00:45:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-11-21 00:45:12,594 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 124 states have (on average 2.346774193548387) internal successors, (291), 124 states have internal predecessors, (291), 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 97 [2021-11-21 00:45:12,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:45:12,599 INFO L225 Difference]: With dead ends: 1211 [2021-11-21 00:45:12,599 INFO L226 Difference]: Without dead ends: 1191 [2021-11-21 00:45:12,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21415 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=9893, Invalid=43699, Unknown=0, NotChecked=0, Total=53592 [2021-11-21 00:45:12,603 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 1077 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:45:12,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1077 Valid, 163 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 00:45:12,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-11-21 00:45:12,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 680. [2021-11-21 00:45:12,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 1.1207658321060383) internal successors, (761), 679 states have internal predecessors, (761), 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 00:45:12,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 761 transitions. [2021-11-21 00:45:12,867 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 761 transitions. Word has length 97 [2021-11-21 00:45:12,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:45:12,868 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 761 transitions. [2021-11-21 00:45:12,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 124 states have (on average 2.346774193548387) internal successors, (291), 124 states have internal predecessors, (291), 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 00:45:12,868 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 761 transitions. [2021-11-21 00:45:12,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-21 00:45:12,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:45:12,871 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 11, 9, 9, 9, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2021-11-21 00:45:12,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-21 00:45:13,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-21 00:45:13,098 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:45:13,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:45:13,099 INFO L85 PathProgramCache]: Analyzing trace with hash -2053995599, now seen corresponding path program 4 times [2021-11-21 00:45:13,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:45:13,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326053155] [2021-11-21 00:45:13,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:13,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:45:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 0 proven. 608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:45:14,278 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:45:14,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326053155] [2021-11-21 00:45:14,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326053155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:45:14,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955259097] [2021-11-21 00:45:14,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:45:14,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:45:14,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:45:14,280 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:45:14,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-21 00:45:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:14,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-21 00:45:14,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:45:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 0 proven. 608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:45:16,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:45:18,496 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 0 proven. 608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:45:18,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955259097] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:45:18,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1153252471] [2021-11-21 00:45:18,499 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:45:18,499 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:45:18,499 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:45:18,500 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:45:18,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:45:24,857 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:45:27,049 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:45:27,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:45:27,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 147 [2021-11-21 00:45:27,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518394358] [2021-11-21 00:45:27,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:45:27,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2021-11-21 00:45:27,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:45:27,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2021-11-21 00:45:27,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3998, Invalid=20808, Unknown=0, NotChecked=0, Total=24806 [2021-11-21 00:45:27,053 INFO L87 Difference]: Start difference. First operand 680 states and 761 transitions. Second operand has 149 states, 148 states have (on average 2.22972972972973) internal successors, (330), 148 states have internal predecessors, (330), 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 00:45:32,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:45:32,823 INFO L93 Difference]: Finished difference Result 1656 states and 1839 transitions. [2021-11-21 00:45:32,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2021-11-21 00:45:32,823 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 148 states have (on average 2.22972972972973) internal successors, (330), 148 states have internal predecessors, (330), 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 110 [2021-11-21 00:45:32,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:45:32,831 INFO L225 Difference]: With dead ends: 1656 [2021-11-21 00:45:32,831 INFO L226 Difference]: Without dead ends: 1637 [2021-11-21 00:45:32,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 205 SyntacticMatches, 16 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32509 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=14785, Invalid=57307, Unknown=0, NotChecked=0, Total=72092 [2021-11-21 00:45:32,835 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 1676 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1676 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:45:32,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1676 Valid, 183 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 00:45:32,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-11-21 00:45:33,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 724. [2021-11-21 00:45:33,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 1.1286307053941909) internal successors, (816), 723 states have internal predecessors, (816), 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 00:45:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 816 transitions. [2021-11-21 00:45:33,169 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 816 transitions. Word has length 110 [2021-11-21 00:45:33,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:45:33,170 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 816 transitions. [2021-11-21 00:45:33,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 148 states have (on average 2.22972972972973) internal successors, (330), 148 states have internal predecessors, (330), 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 00:45:33,170 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 816 transitions. [2021-11-21 00:45:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-21 00:45:33,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:45:33,174 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 15, 11, 11, 11, 6, 6, 6, 5, 5, 1, 1, 1, 1] [2021-11-21 00:45:33,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-21 00:45:33,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-21 00:45:33,390 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:45:33,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:45:33,391 INFO L85 PathProgramCache]: Analyzing trace with hash 872565974, now seen corresponding path program 5 times [2021-11-21 00:45:33,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:45:33,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711088466] [2021-11-21 00:45:33,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:33,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:45:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 0 proven. 1041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:45:35,027 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:45:35,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711088466] [2021-11-21 00:45:35,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711088466] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:45:35,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821192942] [2021-11-21 00:45:35,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:45:35,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:45:35,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:45:35,029 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:45:35,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-21 00:45:35,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-21 00:45:35,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:45:35,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-21 00:45:35,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:45:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 0 proven. 1041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:45:37,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:45:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 0 proven. 1041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:45:41,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821192942] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:45:41,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1099942319] [2021-11-21 00:45:41,405 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:45:41,405 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:45:41,406 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:45:41,406 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:45:41,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:45:48,139 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:45:51,134 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:45:51,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:45:51,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 189 [2021-11-21 00:45:51,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594509518] [2021-11-21 00:45:51,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:45:51,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2021-11-21 00:45:51,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:45:51,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2021-11-21 00:45:51,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6524, Invalid=33276, Unknown=0, NotChecked=0, Total=39800 [2021-11-21 00:45:51,139 INFO L87 Difference]: Start difference. First operand 724 states and 816 transitions. Second operand has 191 states, 190 states have (on average 2.210526315789474) internal successors, (420), 190 states have internal predecessors, (420), 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 00:46:00,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:00,107 INFO L93 Difference]: Finished difference Result 2000 states and 2221 transitions. [2021-11-21 00:46:00,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2021-11-21 00:46:00,108 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 190 states have (on average 2.210526315789474) internal successors, (420), 190 states have internal predecessors, (420), 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 140 [2021-11-21 00:46:00,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:00,117 INFO L225 Difference]: With dead ends: 2000 [2021-11-21 00:46:00,117 INFO L226 Difference]: Without dead ends: 1976 [2021-11-21 00:46:00,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 262 SyntacticMatches, 21 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53465 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=24400, Invalid=92906, Unknown=0, NotChecked=0, Total=117306 [2021-11-21 00:46:00,164 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 1858 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1858 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:46:00,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1858 Valid, 236 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1239 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 00:46:00,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-11-21 00:46:00,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 740. [2021-11-21 00:46:00,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 1.121786197564276) internal successors, (829), 739 states have internal predecessors, (829), 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 00:46:00,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 829 transitions. [2021-11-21 00:46:00,528 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 829 transitions. Word has length 140 [2021-11-21 00:46:00,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:00,529 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 829 transitions. [2021-11-21 00:46:00,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 190 states have (on average 2.210526315789474) internal successors, (420), 190 states have internal predecessors, (420), 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 00:46:00,530 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 829 transitions. [2021-11-21 00:46:00,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-21 00:46:00,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:00,534 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 13, 13, 13, 12, 12, 12, 11, 11, 2, 1, 1, 1, 1] [2021-11-21 00:46:00,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-21 00:46:00,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-21 00:46:00,762 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:46:00,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:00,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1631626053, now seen corresponding path program 6 times [2021-11-21 00:46:00,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:46:00,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809162183] [2021-11-21 00:46:00,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:00,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:46:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1492 backedges. 0 proven. 1492 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:46:02,872 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:46:02,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809162183] [2021-11-21 00:46:02,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809162183] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:46:02,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403159263] [2021-11-21 00:46:02,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:46:02,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:46:02,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:46:02,873 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:46:02,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-21 00:46:03,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:46:03,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:46:03,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-21 00:46:03,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1492 backedges. 0 proven. 1492 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:46:07,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:46:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1492 backedges. 0 proven. 1492 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:46:11,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403159263] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:46:11,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [712121369] [2021-11-21 00:46:11,741 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:46:11,742 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:46:11,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:46:11,742 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:46:11,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:46:18,428 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:46:21,105 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:46:21,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:46:21,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 219 [2021-11-21 00:46:21,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144795666] [2021-11-21 00:46:21,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:46:21,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 221 states [2021-11-21 00:46:21,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:46:21,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 221 interpolants. [2021-11-21 00:46:21,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8662, Invalid=44008, Unknown=0, NotChecked=0, Total=52670 [2021-11-21 00:46:21,115 INFO L87 Difference]: Start difference. First operand 740 states and 829 transitions. Second operand has 221 states, 220 states have (on average 2.3454545454545452) internal successors, (516), 220 states have internal predecessors, (516), 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 00:46:34,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:34,061 INFO L93 Difference]: Finished difference Result 1699 states and 1915 transitions. [2021-11-21 00:46:34,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2021-11-21 00:46:34,062 INFO L78 Accepts]: Start accepts. Automaton has has 221 states, 220 states have (on average 2.3454545454545452) internal successors, (516), 220 states have internal predecessors, (516), 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 172 [2021-11-21 00:46:34,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:34,073 INFO L225 Difference]: With dead ends: 1699 [2021-11-21 00:46:34,073 INFO L226 Difference]: Without dead ends: 1663 [2021-11-21 00:46:34,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 345 SyntacticMatches, 14 SemanticMatches, 415 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75317 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=33028, Invalid=140444, Unknown=0, NotChecked=0, Total=173472 [2021-11-21 00:46:34,091 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 2622 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 1479 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2622 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 1479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:46:34,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2622 Valid, 269 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 1479 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-21 00:46:34,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2021-11-21 00:46:34,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 892. [2021-11-21 00:46:34,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 1.1257014590347925) internal successors, (1003), 891 states have internal predecessors, (1003), 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 00:46:34,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1003 transitions. [2021-11-21 00:46:34,461 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1003 transitions. Word has length 172 [2021-11-21 00:46:34,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:34,462 INFO L470 AbstractCegarLoop]: Abstraction has 892 states and 1003 transitions. [2021-11-21 00:46:34,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 221 states, 220 states have (on average 2.3454545454545452) internal successors, (516), 220 states have internal predecessors, (516), 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 00:46:34,462 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1003 transitions. [2021-11-21 00:46:34,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-21 00:46:34,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:34,467 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:46:34,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-21 00:46:34,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-21 00:46:34,694 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:46:34,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:34,695 INFO L85 PathProgramCache]: Analyzing trace with hash -432884600, now seen corresponding path program 6 times [2021-11-21 00:46:34,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:46:34,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474693871] [2021-11-21 00:46:34,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:34,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:46:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3487 backedges. 0 proven. 3487 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:46:37,893 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:46:37,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474693871] [2021-11-21 00:46:37,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474693871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:46:37,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172649944] [2021-11-21 00:46:37,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:46:37,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:46:37,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:46:37,894 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:46:37,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-21 00:46:37,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:46:37,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:46:37,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-21 00:46:37,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3487 backedges. 0 proven. 3487 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:46:42,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:46:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3487 backedges. 0 proven. 3487 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:46:49,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172649944] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:46:49,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [314528578] [2021-11-21 00:46:49,568 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:46:49,568 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:46:49,568 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:46:49,569 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:46:49,569 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:46:50,962 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:46:52,131 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:46:52,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:46:52,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87, 87] total 261 [2021-11-21 00:46:52,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27390638] [2021-11-21 00:46:52,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:46:52,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 263 states [2021-11-21 00:46:52,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:46:52,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 263 interpolants. [2021-11-21 00:46:52,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15882, Invalid=58920, Unknown=0, NotChecked=0, Total=74802 [2021-11-21 00:46:52,139 INFO L87 Difference]: Start difference. First operand 892 states and 1003 transitions. Second operand has 263 states, 262 states have (on average 2.0381679389312977) internal successors, (534), 262 states have internal predecessors, (534), 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 00:47:08,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:08,142 INFO L93 Difference]: Finished difference Result 2142 states and 2422 transitions. [2021-11-21 00:47:08,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 263 states. [2021-11-21 00:47:08,143 INFO L78 Accepts]: Start accepts. Automaton has has 263 states, 262 states have (on average 2.0381679389312977) internal successors, (534), 262 states have internal predecessors, (534), 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 178 [2021-11-21 00:47:08,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:08,152 INFO L225 Difference]: With dead ends: 2142 [2021-11-21 00:47:08,152 INFO L226 Difference]: Without dead ends: 2096 [2021-11-21 00:47:08,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 445 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80668 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=49167, Invalid=150195, Unknown=0, NotChecked=0, Total=199362 [2021-11-21 00:47:08,168 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 2581 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2581 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:08,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2581 Valid, 307 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-21 00:47:08,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2021-11-21 00:47:08,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 1372. [2021-11-21 00:47:08,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 1.113056163384391) internal successors, (1526), 1371 states have internal predecessors, (1526), 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 00:47:08,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 1526 transitions. [2021-11-21 00:47:08,848 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 1526 transitions. Word has length 178 [2021-11-21 00:47:08,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:08,848 INFO L470 AbstractCegarLoop]: Abstraction has 1372 states and 1526 transitions. [2021-11-21 00:47:08,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 263 states, 262 states have (on average 2.0381679389312977) internal successors, (534), 262 states have internal predecessors, (534), 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 00:47:08,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 1526 transitions. [2021-11-21 00:47:08,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-21 00:47:08,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:08,853 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 22, 13, 13, 13, 7, 7, 7, 6, 6, 1, 1, 1, 1] [2021-11-21 00:47:08,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:09,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:47:09,070 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:47:09,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:09,071 INFO L85 PathProgramCache]: Analyzing trace with hash 2144638538, now seen corresponding path program 7 times [2021-11-21 00:47:09,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:47:09,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962259777] [2021-11-21 00:47:09,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:09,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:47:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:11,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1907 backedges. 0 proven. 1907 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:11,866 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:47:11,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962259777] [2021-11-21 00:47:11,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962259777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:47:11,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757105083] [2021-11-21 00:47:11,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:47:11,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:47:11,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:47:11,868 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:47:11,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-21 00:47:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:11,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-21 00:47:11,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1907 backedges. 0 proven. 1907 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:16,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1907 backedges. 0 proven. 1907 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:21,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757105083] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:21,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1690791906] [2021-11-21 00:47:21,724 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:47:21,724 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:47:21,724 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:47:21,724 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:47:21,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:47:29,759 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:47:34,574 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:47:34,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:47:34,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 249 [2021-11-21 00:47:34,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126221461] [2021-11-21 00:47:34,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:47:34,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 251 states [2021-11-21 00:47:34,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:47:34,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 251 interpolants. [2021-11-21 00:47:34,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11312, Invalid=56028, Unknown=0, NotChecked=0, Total=67340 [2021-11-21 00:47:34,582 INFO L87 Difference]: Start difference. First operand 1372 states and 1526 transitions. Second operand has 251 states, 250 states have (on average 2.184) internal successors, (546), 250 states have internal predecessors, (546), 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 00:47:50,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:50,884 INFO L93 Difference]: Finished difference Result 3620 states and 3990 transitions. [2021-11-21 00:47:50,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 272 states. [2021-11-21 00:47:50,885 INFO L78 Accepts]: Start accepts. Automaton has has 251 states, 250 states have (on average 2.184) internal successors, (546), 250 states have internal predecessors, (546), 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 182 [2021-11-21 00:47:50,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:50,900 INFO L225 Difference]: With dead ends: 3620 [2021-11-21 00:47:50,901 INFO L226 Difference]: Without dead ends: 3588 [2021-11-21 00:47:50,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 814 GetRequests, 340 SyntacticMatches, 29 SemanticMatches, 445 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92134 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=42348, Invalid=157014, Unknown=0, NotChecked=0, Total=199362 [2021-11-21 00:47:50,912 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3056 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3056 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:50,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3056 Valid, 284 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 1491 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-21 00:47:50,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3588 states. [2021-11-21 00:47:51,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3588 to 1448. [2021-11-21 00:47:51,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 1.120248790601244) internal successors, (1621), 1447 states have internal predecessors, (1621), 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 00:47:51,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 1621 transitions. [2021-11-21 00:47:51,931 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 1621 transitions. Word has length 182 [2021-11-21 00:47:51,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:51,932 INFO L470 AbstractCegarLoop]: Abstraction has 1448 states and 1621 transitions. [2021-11-21 00:47:51,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 251 states, 250 states have (on average 2.184) internal successors, (546), 250 states have internal predecessors, (546), 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 00:47:51,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 1621 transitions. [2021-11-21 00:47:51,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-21 00:47:51,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:51,946 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 28, 15, 15, 15, 8, 8, 8, 7, 7, 1, 1, 1, 1] [2021-11-21 00:47:51,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:52,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:47:52,147 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:47:52,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:52,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1216761593, now seen corresponding path program 8 times [2021-11-21 00:47:52,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:47:52,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586590148] [2021-11-21 00:47:52,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:52,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:47:52,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2906 backedges. 0 proven. 2906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:55,841 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:47:55,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586590148] [2021-11-21 00:47:55,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586590148] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:47:55,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285881253] [2021-11-21 00:47:55,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:47:55,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:47:55,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:47:55,849 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:47:55,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-21 00:47:55,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2021-11-21 00:47:55,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:47:56,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-21 00:47:56,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:48:02,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2906 backedges. 0 proven. 2906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:48:02,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:48:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2906 backedges. 0 proven. 2906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:48:10,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285881253] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:48:10,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1190623715] [2021-11-21 00:48:10,555 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:48:10,556 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:48:10,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:48:10,556 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:48:10,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:48:17,346 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:48:23,705 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:48:23,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:48:23,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 303 [2021-11-21 00:48:23,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159535142] [2021-11-21 00:48:23,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:48:23,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 305 states [2021-11-21 00:48:23,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:48:23,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 305 interpolants. [2021-11-21 00:48:23,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16738, Invalid=81544, Unknown=0, NotChecked=0, Total=98282 [2021-11-21 00:48:23,715 INFO L87 Difference]: Start difference. First operand 1448 states and 1621 transitions. Second operand has 305 states, 304 states have (on average 2.1710526315789473) internal successors, (660), 304 states have internal predecessors, (660), 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 00:48:49,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:48:49,221 INFO L93 Difference]: Finished difference Result 3818 states and 4237 transitions. [2021-11-21 00:48:49,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 330 states. [2021-11-21 00:48:49,222 INFO L78 Accepts]: Start accepts. Automaton has has 305 states, 304 states have (on average 2.1710526315789473) internal successors, (660), 304 states have internal predecessors, (660), 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 220 [2021-11-21 00:48:49,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:48:49,239 INFO L225 Difference]: With dead ends: 3818 [2021-11-21 00:48:49,239 INFO L226 Difference]: Without dead ends: 3779 [2021-11-21 00:48:49,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 986 GetRequests, 411 SyntacticMatches, 36 SemanticMatches, 539 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135876 ImplicationChecksByTransitivity, 35.5s TimeCoverageRelationStatistics Valid=62715, Invalid=229425, Unknown=0, NotChecked=0, Total=292140 [2021-11-21 00:48:49,255 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3580 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3580 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:48:49,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3580 Valid, 353 Invalid, 2345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 1901 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-21 00:48:49,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3779 states. [2021-11-21 00:48:50,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3779 to 1528. [2021-11-21 00:48:50,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 1.1270464963981663) internal successors, (1721), 1527 states have internal predecessors, (1721), 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 00:48:50,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 1721 transitions. [2021-11-21 00:48:50,502 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 1721 transitions. Word has length 220 [2021-11-21 00:48:50,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:48:50,502 INFO L470 AbstractCegarLoop]: Abstraction has 1528 states and 1721 transitions. [2021-11-21 00:48:50,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 305 states, 304 states have (on average 2.1710526315789473) internal successors, (660), 304 states have internal predecessors, (660), 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 00:48:50,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 1721 transitions. [2021-11-21 00:48:50,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-21 00:48:50,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:48:50,508 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 25, 25, 25, 16, 16, 16, 15, 15, 10, 1, 1, 1, 1] [2021-11-21 00:48:50,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-21 00:48:50,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:48:50,730 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:48:50,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:48:50,731 INFO L85 PathProgramCache]: Analyzing trace with hash -916229721, now seen corresponding path program 9 times [2021-11-21 00:48:50,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:48:50,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047808477] [2021-11-21 00:48:50,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:48:50,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:48:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:48:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3356 backedges. 0 proven. 3356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:48:55,376 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:48:55,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047808477] [2021-11-21 00:48:55,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047808477] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:48:55,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884773878] [2021-11-21 00:48:55,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:48:55,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:48:55,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:48:55,378 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:48:55,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-21 00:48:55,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:48:55,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:48:55,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 115 conjunts are in the unsatisfiable core [2021-11-21 00:48:55,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3356 backedges. 0 proven. 3356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:49:02,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3356 backedges. 0 proven. 3356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:49:12,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884773878] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:49:12,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [33989374] [2021-11-21 00:49:12,953 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:49:12,953 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:49:12,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:49:12,954 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:49:12,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:49:21,861 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:49:27,645 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:49:27,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:49:27,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113, 113] total 339 [2021-11-21 00:49:27,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799007022] [2021-11-21 00:49:27,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:49:27,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 341 states [2021-11-21 00:49:27,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:49:27,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 341 interpolants. [2021-11-21 00:49:27,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19934, Invalid=102216, Unknown=0, NotChecked=0, Total=122150 [2021-11-21 00:49:27,661 INFO L87 Difference]: Start difference. First operand 1528 states and 1721 transitions. Second operand has 341 states, 340 states have (on average 2.2941176470588234) internal successors, (780), 340 states have internal predecessors, (780), 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 00:50:04,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:04,418 INFO L93 Difference]: Finished difference Result 3620 states and 4031 transitions. [2021-11-21 00:50:04,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 398 states. [2021-11-21 00:50:04,419 INFO L78 Accepts]: Start accepts. Automaton has has 341 states, 340 states have (on average 2.2941176470588234) internal successors, (780), 340 states have internal predecessors, (780), 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 260 [2021-11-21 00:50:04,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:04,433 INFO L225 Difference]: With dead ends: 3620 [2021-11-21 00:50:04,433 INFO L226 Difference]: Without dead ends: 3575 [2021-11-21 00:50:04,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1174 GetRequests, 517 SyntacticMatches, 26 SemanticMatches, 631 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176806 ImplicationChecksByTransitivity, 43.5s TimeCoverageRelationStatistics Valid=78450, Invalid=321606, Unknown=0, NotChecked=0, Total=400056 [2021-11-21 00:50:04,619 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 4123 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 2129 mSolverCounterSat, 885 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4123 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 3014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 885 IncrementalHoareTripleChecker+Valid, 2129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:04,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4123 Valid, 395 Invalid, 3014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [885 Valid, 2129 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-21 00:50:04,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3575 states. [2021-11-21 00:50:05,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3575 to 1688. [2021-11-21 00:50:05,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1687 states have (on average 1.1304090100770599) internal successors, (1907), 1687 states have internal predecessors, (1907), 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 00:50:05,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 1907 transitions. [2021-11-21 00:50:05,929 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 1907 transitions. Word has length 260 [2021-11-21 00:50:05,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:05,929 INFO L470 AbstractCegarLoop]: Abstraction has 1688 states and 1907 transitions. [2021-11-21 00:50:05,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 341 states, 340 states have (on average 2.2941176470588234) internal successors, (780), 340 states have internal predecessors, (780), 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 00:50:05,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 1907 transitions. [2021-11-21 00:50:05,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-11-21 00:50:05,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:05,935 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 44, 17, 17, 17, 9, 9, 9, 8, 8, 1, 1, 1, 1] [2021-11-21 00:50:05,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-21 00:50:06,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-21 00:50:06,162 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:50:06,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:06,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1242585498, now seen corresponding path program 10 times [2021-11-21 00:50:06,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:06,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571026374] [2021-11-21 00:50:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:06,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5989 backedges. 0 proven. 5989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:50:12,587 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:12,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571026374] [2021-11-21 00:50:12,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571026374] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:50:12,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153268105] [2021-11-21 00:50:12,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:50:12,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:50:12,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:50:12,589 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:50:12,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-21 00:50:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:12,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 141 conjunts are in the unsatisfiable core [2021-11-21 00:50:12,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:50:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5989 backedges. 0 proven. 5989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:50:23,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:50:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5989 backedges. 0 proven. 5989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:50:39,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153268105] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:50:39,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1458190925] [2021-11-21 00:50:39,639 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:50:39,639 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:50:39,640 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:50:39,640 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:50:39,640 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:50:48,138 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:51:00,164 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:51:00,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:51:00,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139, 139] total 417 [2021-11-21 00:51:00,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608139154] [2021-11-21 00:51:00,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:51:00,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 419 states [2021-11-21 00:51:00,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:51:00,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 419 interpolants. [2021-11-21 00:51:00,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32296, Invalid=150460, Unknown=0, NotChecked=0, Total=182756 [2021-11-21 00:51:00,181 INFO L87 Difference]: Start difference. First operand 1688 states and 1907 transitions. Second operand has 419 states, 418 states have (on average 2.138755980861244) internal successors, (894), 418 states have internal predecessors, (894), 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 00:51:54,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:51:54,558 INFO L93 Difference]: Finished difference Result 5404 states and 6021 transitions. [2021-11-21 00:51:54,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 448 states. [2021-11-21 00:51:54,559 INFO L78 Accepts]: Start accepts. Automaton has has 419 states, 418 states have (on average 2.138755980861244) internal successors, (894), 418 states have internal predecessors, (894), 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 298 [2021-11-21 00:51:54,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:51:54,589 INFO L225 Difference]: With dead ends: 5404 [2021-11-21 00:51:54,590 INFO L226 Difference]: Without dead ends: 5348 [2021-11-21 00:51:54,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1338 GetRequests, 552 SyntacticMatches, 53 SemanticMatches, 733 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254764 ImplicationChecksByTransitivity, 64.8s TimeCoverageRelationStatistics Valid=119134, Invalid=420356, Unknown=0, NotChecked=0, Total=539490 [2021-11-21 00:51:54,618 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 5077 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 2403 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5077 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 2917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 2403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:51:54,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5077 Valid, 455 Invalid, 2917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 2403 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-21 00:51:54,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5348 states. [2021-11-21 00:51:56,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5348 to 1824. [2021-11-21 00:51:56,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1823 states have (on average 1.12013165112452) internal successors, (2042), 1823 states have internal predecessors, (2042), 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 00:51:56,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 2042 transitions. [2021-11-21 00:51:56,794 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 2042 transitions. Word has length 298 [2021-11-21 00:51:56,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:51:56,795 INFO L470 AbstractCegarLoop]: Abstraction has 1824 states and 2042 transitions. [2021-11-21 00:51:56,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 419 states, 418 states have (on average 2.138755980861244) internal successors, (894), 418 states have internal predecessors, (894), 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 00:51:56,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 2042 transitions. [2021-11-21 00:51:56,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-11-21 00:51:56,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:51:56,802 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 52, 19, 19, 19, 10, 10, 10, 9, 9, 1, 1, 1, 1] [2021-11-21 00:51:56,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-21 00:51:57,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-21 00:51:57,018 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:51:57,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:51:57,019 INFO L85 PathProgramCache]: Analyzing trace with hash 566088787, now seen corresponding path program 11 times [2021-11-21 00:51:57,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:51:57,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818315402] [2021-11-21 00:51:57,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:51:57,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:51:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:52:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8174 backedges. 0 proven. 8174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:52:05,521 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:52:05,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818315402] [2021-11-21 00:52:05,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818315402] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:52:05,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936767339] [2021-11-21 00:52:05,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:52:05,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:52:05,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:52:05,523 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:52:05,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-21 00:52:05,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2021-11-21 00:52:05,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:52:05,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 163 conjunts are in the unsatisfiable core [2021-11-21 00:52:05,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:52:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8174 backedges. 0 proven. 8174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:52:19,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:52:40,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8174 backedges. 0 proven. 8174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:52:40,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936767339] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:52:40,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1026908641] [2021-11-21 00:52:40,093 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:52:40,093 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:52:40,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:52:40,094 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:52:40,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:52:48,824 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:53:04,965 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:53:04,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:53:04,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [161, 161, 161] total 483 [2021-11-21 00:53:04,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632490492] [2021-11-21 00:53:04,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:53:04,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 485 states [2021-11-21 00:53:04,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:53:04,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 485 interpolants. [2021-11-21 00:53:04,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43406, Invalid=200136, Unknown=0, NotChecked=0, Total=243542 [2021-11-21 00:53:04,987 INFO L87 Difference]: Start difference. First operand 1824 states and 2042 transitions. Second operand has 485 states, 484 states have (on average 2.1322314049586777) internal successors, (1032), 484 states have internal predecessors, (1032), 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 00:54:25,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:54:25,788 INFO L93 Difference]: Finished difference Result 4971 states and 5579 transitions. [2021-11-21 00:54:25,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 518 states. [2021-11-21 00:54:25,789 INFO L78 Accepts]: Start accepts. Automaton has has 485 states, 484 states have (on average 2.1322314049586777) internal successors, (1032), 484 states have internal predecessors, (1032), 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 344 [2021-11-21 00:54:25,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:54:25,800 INFO L225 Difference]: With dead ends: 4971 [2021-11-21 00:54:25,800 INFO L226 Difference]: Without dead ends: 4906 [2021-11-21 00:54:25,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1546 GetRequests, 637 SyntacticMatches, 62 SemanticMatches, 847 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340995 ImplicationChecksByTransitivity, 84.6s TimeCoverageRelationStatistics Valid=159906, Invalid=560046, Unknown=0, NotChecked=0, Total=719952 [2021-11-21 00:54:25,836 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 6386 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 2822 mSolverCounterSat, 689 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6386 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 3511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 689 IncrementalHoareTripleChecker+Valid, 2822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:54:25,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6386 Valid, 538 Invalid, 3511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [689 Valid, 2822 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-21 00:54:25,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4906 states. [2021-11-21 00:54:28,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4906 to 2054. [2021-11-21 00:54:28,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 1.1193375547978568) internal successors, (2298), 2053 states have internal predecessors, (2298), 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 00:54:28,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 2298 transitions. [2021-11-21 00:54:28,277 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 2298 transitions. Word has length 344 [2021-11-21 00:54:28,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:54:28,278 INFO L470 AbstractCegarLoop]: Abstraction has 2054 states and 2298 transitions. [2021-11-21 00:54:28,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 485 states, 484 states have (on average 2.1322314049586777) internal successors, (1032), 484 states have internal predecessors, (1032), 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 00:54:28,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 2298 transitions. [2021-11-21 00:54:28,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-11-21 00:54:28,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:54:28,285 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 39, 39, 39, 22, 20, 20, 20, 19, 19, 1, 1, 1, 1] [2021-11-21 00:54:28,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-21 00:54:28,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:54:28,498 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:54:28,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:54:28,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1689947559, now seen corresponding path program 12 times [2021-11-21 00:54:28,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:54:28,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976622149] [2021-11-21 00:54:28,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:54:28,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:54:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:54:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6704 backedges. 0 proven. 6704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:54:36,099 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:54:36,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976622149] [2021-11-21 00:54:36,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976622149] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:54:36,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896979238] [2021-11-21 00:54:36,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:54:36,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:54:36,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:54:36,106 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:54:36,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda6ff72-8fbd-4060-8789-f9b6d18da784/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-21 00:54:36,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:54:36,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:54:36,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 163 conjunts are in the unsatisfiable core [2021-11-21 00:54:36,348 INFO L286 TraceCheckSpWp]: Computing forward predicates...