./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/easy2-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/easy2-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8 --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 0ba0e3ec7d24c78a29a4980275f3f450c6adf9cab13a788bc587b5f2c8c6cbd4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:38:48,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:38:48,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:38:48,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:38:48,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:38:48,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:38:48,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:38:48,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:38:48,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:38:48,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:38:48,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:38:48,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:38:48,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:38:48,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:38:48,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:38:48,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:38:48,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:38:48,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:38:48,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:38:48,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:38:48,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:38:48,521 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:38:48,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:38:48,526 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:38:48,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:38:48,533 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:38:48,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:38:48,536 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:38:48,537 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:38:48,538 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:38:48,539 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:38:48,539 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:38:48,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:38:48,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:38:48,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:38:48,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:38:48,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:38:48,546 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:38:48,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:38:48,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:38:48,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:38:48,548 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-07 01:38:48,593 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:38:48,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:38:48,594 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:38:48,595 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:38:48,595 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:38:48,595 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:38:48,595 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:38:48,596 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:38:48,596 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:38:48,596 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:38:48,597 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:38:48,597 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:38:48,598 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:38:48,598 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:38:48,598 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:38:48,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:38:48,599 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:38:48,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:38:48,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:38:48,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:38:48,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:38:48,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:38:48,600 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-07 01:38:48,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:38:48,601 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:38:48,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:38:48,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:38:48,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:38:48,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:38:48,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:38:48,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:38:48,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:38:48,603 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:38:48,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:38:48,603 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:38:48,603 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:38:48,604 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:38:48,604 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_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ba0e3ec7d24c78a29a4980275f3f450c6adf9cab13a788bc587b5f2c8c6cbd4 [2021-11-07 01:38:48,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:38:48,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:38:48,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:38:48,976 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:38:48,977 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:38:48,978 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/termination-crafted/easy2-2.c [2021-11-07 01:38:49,047 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/data/4bf3b7553/2d6d1571cf284e0aa51de5ae96b5941b/FLAGdaec99b73 [2021-11-07 01:38:49,598 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:38:49,598 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/sv-benchmarks/c/termination-crafted/easy2-2.c [2021-11-07 01:38:49,606 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/data/4bf3b7553/2d6d1571cf284e0aa51de5ae96b5941b/FLAGdaec99b73 [2021-11-07 01:38:49,953 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/data/4bf3b7553/2d6d1571cf284e0aa51de5ae96b5941b [2021-11-07 01:38:49,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:38:49,957 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:38:49,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:38:49,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:38:49,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:38:49,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:38:49" (1/1) ... [2021-11-07 01:38:49,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@348a9c98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:49, skipping insertion in model container [2021-11-07 01:38:49,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:38:49" (1/1) ... [2021-11-07 01:38:49,972 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:38:49,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:38:50,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:38:50,118 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:38:50,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:38:50,144 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:38:50,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:50 WrapperNode [2021-11-07 01:38:50,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:38:50,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:38:50,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:38:50,147 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:38:50,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:50" (1/1) ... [2021-11-07 01:38:50,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:50" (1/1) ... [2021-11-07 01:38:50,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:38:50,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:38:50,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:38:50,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:38:50,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:50" (1/1) ... [2021-11-07 01:38:50,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:50" (1/1) ... [2021-11-07 01:38:50,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:50" (1/1) ... [2021-11-07 01:38:50,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:50" (1/1) ... [2021-11-07 01:38:50,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:50" (1/1) ... [2021-11-07 01:38:50,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:50" (1/1) ... [2021-11-07 01:38:50,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:50" (1/1) ... [2021-11-07 01:38:50,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:38:50,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:38:50,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:38:50,203 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:38:50,204 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:50" (1/1) ... [2021-11-07 01:38:50,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:38:50,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:38:50,248 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:38:50,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:38:50,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:38:50,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:38:50,528 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:38:50,529 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-07 01:38:50,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:38:50 BoogieIcfgContainer [2021-11-07 01:38:50,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:38:50,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:38:50,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:38:50,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:38:50,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:38:49" (1/3) ... [2021-11-07 01:38:50,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bef5364 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:38:50, skipping insertion in model container [2021-11-07 01:38:50,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:50" (2/3) ... [2021-11-07 01:38:50,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bef5364 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:38:50, skipping insertion in model container [2021-11-07 01:38:50,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:38:50" (3/3) ... [2021-11-07 01:38:50,543 INFO L111 eAbstractionObserver]: Analyzing ICFG easy2-2.c [2021-11-07 01:38:50,552 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:38:50,552 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:38:50,614 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:38:50,625 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 [2021-11-07 01:38:50,625 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:38:50,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 8 states have (on average 1.875) internal successors, (15), 14 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) [2021-11-07 01:38:50,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 01:38:50,649 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:50,649 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 01:38:50,650 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)] === [2021-11-07 01:38:50,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:50,656 INFO L85 PathProgramCache]: Analyzing trace with hash 31073, now seen corresponding path program 1 times [2021-11-07 01:38:50,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:50,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797288594] [2021-11-07 01:38:50,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:50,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:50,798 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:50,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797288594] [2021-11-07 01:38:50,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797288594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:50,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:50,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-07 01:38:50,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218394018] [2021-11-07 01:38:50,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:38:50,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:50,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:38:50,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:50,821 INFO L87 Difference]: Start difference. First operand has 15 states, 8 states have (on average 1.875) internal successors, (15), 14 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) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2021-11-07 01:38:50,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:50,862 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-11-07 01:38:50,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:50,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2021-11-07 01:38:50,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:50,872 INFO L225 Difference]: With dead ends: 20 [2021-11-07 01:38:50,872 INFO L226 Difference]: Without dead ends: 17 [2021-11-07 01:38:50,874 INFO L786 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 [2021-11-07 01:38:50,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-07 01:38:50,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-11-07 01:38:50,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.6) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:50,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-11-07 01:38:50,936 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 3 [2021-11-07 01:38:50,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:50,936 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-11-07 01:38:50,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2021-11-07 01:38:50,937 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-11-07 01:38:50,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-07 01:38:50,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:50,938 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-07 01:38:50,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:38:50,938 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)] === [2021-11-07 01:38:50,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:50,939 INFO L85 PathProgramCache]: Analyzing trace with hash 963307, now seen corresponding path program 1 times [2021-11-07 01:38:50,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:50,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50785924] [2021-11-07 01:38:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:50,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:50,984 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:50,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50785924] [2021-11-07 01:38:50,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50785924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:50,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:50,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-07 01:38:50,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875017050] [2021-11-07 01:38:50,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:38:50,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:50,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:38:50,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:50,991 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2021-11-07 01:38:51,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:51,009 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-11-07 01:38:51,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:51,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 [2021-11-07 01:38:51,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:51,011 INFO L225 Difference]: With dead ends: 16 [2021-11-07 01:38:51,012 INFO L226 Difference]: Without dead ends: 15 [2021-11-07 01:38:51,013 INFO L786 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 [2021-11-07 01:38:51,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-07 01:38:51,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-07 01:38:51,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.5) internal successors, (15), 14 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) [2021-11-07 01:38:51,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-07 01:38:51,020 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 4 [2021-11-07 01:38:51,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:51,020 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-07 01:38:51,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2021-11-07 01:38:51,021 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-07 01:38:51,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 01:38:51,022 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:51,022 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 01:38:51,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:38:51,023 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-07 01:38:51,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:51,035 INFO L85 PathProgramCache]: Analyzing trace with hash 29862563, now seen corresponding path program 1 times [2021-11-07 01:38:51,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:51,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824154617] [2021-11-07 01:38:51,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:51,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:51,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:51,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:51,077 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:51,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824154617] [2021-11-07 01:38:51,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824154617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:51,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:51,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-07 01:38:51,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599187226] [2021-11-07 01:38:51,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:38:51,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:51,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:38:51,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:51,088 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-11-07 01:38:51,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:51,099 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-11-07 01:38:51,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:51,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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 [2021-11-07 01:38:51,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:51,102 INFO L225 Difference]: With dead ends: 15 [2021-11-07 01:38:51,102 INFO L226 Difference]: Without dead ends: 14 [2021-11-07 01:38:51,103 INFO L786 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 [2021-11-07 01:38:51,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-07 01:38:51,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-07 01:38:51,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.4) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-11-07 01:38:51,109 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 5 [2021-11-07 01:38:51,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:51,110 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-11-07 01:38:51,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-11-07 01:38:51,110 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-11-07 01:38:51,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:38:51,111 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:51,111 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:38:51,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:38:51,112 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-07 01:38:51,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:51,113 INFO L85 PathProgramCache]: Analyzing trace with hash 925739501, now seen corresponding path program 1 times [2021-11-07 01:38:51,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:51,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3596352] [2021-11-07 01:38:51,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:51,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:51,154 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:51,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3596352] [2021-11-07 01:38:51,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3596352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:51,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:51,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-07 01:38:51,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6434246] [2021-11-07 01:38:51,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:38:51,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:51,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:38:51,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:51,164 INFO L87 Difference]: Start difference. First operand 14 states and 14 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) [2021-11-07 01:38:51,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:51,209 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-11-07 01:38:51,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:51,210 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 [2021-11-07 01:38:51,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:51,211 INFO L225 Difference]: With dead ends: 18 [2021-11-07 01:38:51,211 INFO L226 Difference]: Without dead ends: 17 [2021-11-07 01:38:51,212 INFO L786 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 [2021-11-07 01:38:51,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-07 01:38:51,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-07 01:38:51,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 16 states have internal predecessors, (17), 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) [2021-11-07 01:38:51,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-11-07 01:38:51,219 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 6 [2021-11-07 01:38:51,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:51,219 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-11-07 01:38:51,219 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) [2021-11-07 01:38:51,220 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-11-07 01:38:51,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 01:38:51,220 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:51,220 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:51,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:38:51,222 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-07 01:38:51,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:51,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1366846491, now seen corresponding path program 1 times [2021-11-07 01:38:51,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:51,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736287136] [2021-11-07 01:38:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:51,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:51,298 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:51,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736287136] [2021-11-07 01:38:51,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736287136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:51,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:51,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-07 01:38:51,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38283523] [2021-11-07 01:38:51,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:38:51,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:51,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:38:51,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:51,306 INFO L87 Difference]: Start difference. First operand 17 states and 17 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) [2021-11-07 01:38:51,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:51,319 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-11-07 01:38:51,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:51,319 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 [2021-11-07 01:38:51,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:51,320 INFO L225 Difference]: With dead ends: 17 [2021-11-07 01:38:51,322 INFO L226 Difference]: Without dead ends: 16 [2021-11-07 01:38:51,323 INFO L786 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 [2021-11-07 01:38:51,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-07 01:38:51,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-07 01:38:51,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-11-07 01:38:51,327 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 7 [2021-11-07 01:38:51,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:51,328 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-11-07 01:38:51,329 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) [2021-11-07 01:38:51,329 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-11-07 01:38:51,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:38:51,331 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:51,331 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:51,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:38:51,332 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-07 01:38:51,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:51,333 INFO L85 PathProgramCache]: Analyzing trace with hash 577431791, now seen corresponding path program 1 times [2021-11-07 01:38:51,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:51,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027963268] [2021-11-07 01:38:51,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:51,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:51,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:51,376 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:51,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027963268] [2021-11-07 01:38:51,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027963268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:51,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:51,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:38:51,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611822376] [2021-11-07 01:38:51,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:38:51,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:51,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:38:51,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:51,385 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:51,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:51,395 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-11-07 01:38:51,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:51,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 01:38:51,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:51,403 INFO L225 Difference]: With dead ends: 16 [2021-11-07 01:38:51,403 INFO L226 Difference]: Without dead ends: 15 [2021-11-07 01:38:51,404 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:51,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-07 01:38:51,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-07 01:38:51,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 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) [2021-11-07 01:38:51,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-07 01:38:51,409 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-11-07 01:38:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:51,409 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-07 01:38:51,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:51,409 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-07 01:38:51,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 01:38:51,410 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:51,410 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:51,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:38:51,411 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)] === [2021-11-07 01:38:51,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:51,412 INFO L85 PathProgramCache]: Analyzing trace with hash 861171249, now seen corresponding path program 1 times [2021-11-07 01:38:51,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:51,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749216426] [2021-11-07 01:38:51,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:51,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:51,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:51,475 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:51,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749216426] [2021-11-07 01:38:51,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749216426] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:38:51,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586778989] [2021-11-07 01:38:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:51,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:38:51,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:38:51,482 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:38:51,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:38:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:51,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:38:51,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:51,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:51,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586778989] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:51,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [19111778] [2021-11-07 01:38:51,719 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-07 01:38:51,719 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:38:51,726 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:38:51,733 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:38:51,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:38:51,790 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:38:51,796 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:38:51,805 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-07 01:38:51,807 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:38:51,810 INFO L180 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size [2021-11-07 01:38:51,813 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:38:51,816 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-07 01:38:51,818 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 01:38:51,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:51,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:51,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:51,874 INFO L180 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size [2021-11-07 01:38:51,888 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:38:51,893 INFO L180 QuantifierPusher]: treesize reduction 7, result has 87.7 percent of original size [2021-11-07 01:38:51,906 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:38:51,917 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.1 percent of original size [2021-11-07 01:38:51,929 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-07 01:38:51,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:51,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:51,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:51,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:51,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:51,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:51,974 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:38:51,978 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:38:51,983 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:38:51,985 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:38:51,988 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:38:51,990 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:38:51,994 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:38:51,996 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:38:51,999 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:38:52,002 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:38:52,006 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:38:52,008 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:38:52,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:52,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:52,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:52,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:52,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:52,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:52,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:52,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:52,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:52,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:52,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:52,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:52,076 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:38:52,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:38:52,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:38:52,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2021-11-07 01:38:52,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943798225] [2021-11-07 01:38:52,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:38:52,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:52,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:38:52,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:38:52,402 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:52,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:52,432 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-11-07 01:38:52,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:38:52,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-07 01:38:52,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:52,434 INFO L225 Difference]: With dead ends: 36 [2021-11-07 01:38:52,434 INFO L226 Difference]: Without dead ends: 35 [2021-11-07 01:38:52,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:38:52,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-07 01:38:52,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-11-07 01:38:52,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 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) [2021-11-07 01:38:52,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-11-07 01:38:52,440 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 10 [2021-11-07 01:38:52,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:52,440 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-11-07 01:38:52,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:52,441 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-11-07 01:38:52,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:38:52,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:52,441 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-07 01:38:52,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:52,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-07 01:38:52,663 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-07 01:38:52,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:52,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1313063709, now seen corresponding path program 1 times [2021-11-07 01:38:52,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:52,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060153161] [2021-11-07 01:38:52,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:52,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:52,706 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:52,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060153161] [2021-11-07 01:38:52,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060153161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:38:52,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191679609] [2021-11-07 01:38:52,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:52,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:38:52,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:38:52,714 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:38:52,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 01:38:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:52,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:38:52,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:52,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:52,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191679609] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:52,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [518652629] [2021-11-07 01:38:52,914 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-07 01:38:52,914 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:38:52,915 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:38:52,915 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:38:52,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:38:52,924 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:38:52,927 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:38:52,935 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-07 01:38:52,937 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:38:52,938 INFO L180 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size [2021-11-07 01:38:52,946 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:38:52,950 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-07 01:38:52,953 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 01:38:52,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:52,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:52,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:52,981 INFO L180 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size [2021-11-07 01:38:52,984 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:38:52,987 INFO L180 QuantifierPusher]: treesize reduction 7, result has 87.7 percent of original size [2021-11-07 01:38:52,990 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:38:52,993 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.1 percent of original size [2021-11-07 01:38:52,995 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-07 01:38:52,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:53,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:53,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:53,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:53,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:53,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:53,013 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:38:53,014 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:38:53,016 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:38:53,018 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:38:53,020 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:38:53,021 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:38:53,024 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:38:53,026 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:38:53,028 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:38:53,036 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:38:53,040 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:38:53,042 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:38:53,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:53,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:53,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:53,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:53,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:53,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:53,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:53,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:53,078 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:38:53,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:38:53,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:38:53,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2021-11-07 01:38:53,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113714838] [2021-11-07 01:38:53,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:38:53,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:53,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:38:53,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:38:53,306 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2021-11-07 01:38:53,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:53,334 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-11-07 01:38:53,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:38:53,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 [2021-11-07 01:38:53,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:53,335 INFO L225 Difference]: With dead ends: 37 [2021-11-07 01:38:53,335 INFO L226 Difference]: Without dead ends: 36 [2021-11-07 01:38:53,336 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:38:53,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-07 01:38:53,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-07 01:38:53,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 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) [2021-11-07 01:38:53,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-11-07 01:38:53,341 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 13 [2021-11-07 01:38:53,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:53,341 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-11-07 01:38:53,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2021-11-07 01:38:53,342 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-11-07 01:38:53,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:38:53,343 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:53,343 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1] [2021-11-07 01:38:53,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:53,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 01:38:53,564 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-07 01:38:53,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:53,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1391598239, now seen corresponding path program 2 times [2021-11-07 01:38:53,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:53,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246242609] [2021-11-07 01:38:53,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:53,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:53,626 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:53,626 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:53,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246242609] [2021-11-07 01:38:53,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246242609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:38:53,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769716474] [2021-11-07 01:38:53,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:38:53,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:38:53,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:38:53,628 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:38:53,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 01:38:53,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 01:38:53,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:38:53,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:38:53,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:53,807 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:53,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:53,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769716474] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:53,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2094178578] [2021-11-07 01:38:53,936 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-07 01:38:53,936 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:38:53,936 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:38:53,937 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:38:53,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:38:53,948 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:38:53,950 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:38:53,953 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-07 01:38:53,954 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:38:53,957 INFO L180 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size [2021-11-07 01:38:53,959 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:38:53,960 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-07 01:38:53,963 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 01:38:53,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:53,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:53,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:53,981 INFO L180 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size [2021-11-07 01:38:53,984 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:38:53,988 INFO L180 QuantifierPusher]: treesize reduction 7, result has 87.7 percent of original size [2021-11-07 01:38:53,996 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:38:53,999 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.1 percent of original size [2021-11-07 01:38:54,003 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-07 01:38:54,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:54,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:54,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:54,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:54,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:54,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:54,036 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:38:54,041 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:38:54,043 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:38:54,046 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:38:54,050 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:38:54,051 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:38:54,055 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:38:54,056 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:38:54,060 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:38:54,061 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:38:54,067 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:38:54,069 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:38:54,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:54,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:54,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:54,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:54,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:54,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:54,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:54,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:54,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:54,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:54,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:54,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:54,118 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:38:54,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:38:54,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:38:54,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-11-07 01:38:54,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276792579] [2021-11-07 01:38:54,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:38:54,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:54,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:38:54,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:38:54,411 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 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) [2021-11-07 01:38:54,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:54,467 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-11-07 01:38:54,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:38:54,468 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 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 31 [2021-11-07 01:38:54,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:54,469 INFO L225 Difference]: With dead ends: 81 [2021-11-07 01:38:54,469 INFO L226 Difference]: Without dead ends: 80 [2021-11-07 01:38:54,470 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:38:54,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-07 01:38:54,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2021-11-07 01:38:54,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.095890410958904) internal successors, (80), 74 states have internal predecessors, (80), 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) [2021-11-07 01:38:54,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2021-11-07 01:38:54,478 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 31 [2021-11-07 01:38:54,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:54,478 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2021-11-07 01:38:54,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 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) [2021-11-07 01:38:54,478 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2021-11-07 01:38:54,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 01:38:54,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:54,479 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1] [2021-11-07 01:38:54,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:54,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-07 01:38:54,703 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-07 01:38:54,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:54,703 INFO L85 PathProgramCache]: Analyzing trace with hash -2078753299, now seen corresponding path program 2 times [2021-11-07 01:38:54,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:54,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002926899] [2021-11-07 01:38:54,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:54,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:54,785 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:54,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002926899] [2021-11-07 01:38:54,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002926899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:38:54,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465942660] [2021-11-07 01:38:54,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:38:54,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:38:54,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:38:54,787 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:38:54,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 01:38:54,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 01:38:54,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:38:54,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:38:54,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:54,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:55,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465942660] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:55,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [947179209] [2021-11-07 01:38:55,094 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-07 01:38:55,094 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:38:55,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:38:55,094 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:38:55,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:38:55,098 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:38:55,101 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:38:55,104 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-07 01:38:55,105 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:38:55,106 INFO L180 QuantifierPusher]: treesize reduction 10, result has 65.5 percent of original size [2021-11-07 01:38:55,108 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:38:55,109 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-07 01:38:55,110 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 01:38:55,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:55,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:55,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:55,121 INFO L180 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size [2021-11-07 01:38:55,123 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:38:55,125 INFO L180 QuantifierPusher]: treesize reduction 7, result has 87.7 percent of original size [2021-11-07 01:38:55,130 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:38:55,135 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.1 percent of original size [2021-11-07 01:38:55,138 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-07 01:38:55,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:55,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:55,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:55,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:55,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:55,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:55,155 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:38:55,158 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:38:55,160 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:38:55,162 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:38:55,164 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:38:55,165 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:38:55,168 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:38:55,170 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:38:55,172 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:38:55,173 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:38:55,176 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:38:55,179 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:38:55,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:55,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:55,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:55,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:55,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:55,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:55,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:55,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:55,198 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:38:55,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:38:55,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:38:55,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-11-07 01:38:55,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319053407] [2021-11-07 01:38:55,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:38:55,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:55,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:38:55,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:38:55,473 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 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) [2021-11-07 01:38:55,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:55,522 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2021-11-07 01:38:55,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:38:55,522 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 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 34 [2021-11-07 01:38:55,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:55,524 INFO L225 Difference]: With dead ends: 79 [2021-11-07 01:38:55,524 INFO L226 Difference]: Without dead ends: 78 [2021-11-07 01:38:55,524 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:38:55,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-07 01:38:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-07 01:38:55,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 77 states have internal predecessors, (78), 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) [2021-11-07 01:38:55,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2021-11-07 01:38:55,532 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 34 [2021-11-07 01:38:55,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:55,532 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2021-11-07 01:38:55,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 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) [2021-11-07 01:38:55,533 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2021-11-07 01:38:55,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:38:55,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:55,535 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1] [2021-11-07 01:38:55,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-07 01:38:55,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-07 01:38:55,751 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-07 01:38:55,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:55,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1123989663, now seen corresponding path program 3 times [2021-11-07 01:38:55,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:55,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353304741] [2021-11-07 01:38:55,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:55,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:55,883 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:55,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353304741] [2021-11-07 01:38:55,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353304741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:38:55,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899928211] [2021-11-07 01:38:55,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:38:55,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:38:55,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:38:55,885 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:38:55,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 01:38:55,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:38:55,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:38:55,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:38:55,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:56,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:56,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899928211] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:56,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1606904699] [2021-11-07 01:38:56,552 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-07 01:38:56,552 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:38:56,552 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:38:56,553 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:38:56,553 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:38:56,556 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:38:56,558 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:38:56,560 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-07 01:38:56,562 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:38:56,564 INFO L180 QuantifierPusher]: treesize reduction 10, result has 65.5 percent of original size [2021-11-07 01:38:56,567 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:38:56,569 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-07 01:38:56,570 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 01:38:56,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:56,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:56,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:56,581 INFO L180 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size [2021-11-07 01:38:56,584 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:38:56,586 INFO L180 QuantifierPusher]: treesize reduction 7, result has 87.7 percent of original size [2021-11-07 01:38:56,592 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:38:56,594 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.1 percent of original size [2021-11-07 01:38:56,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-07 01:38:56,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:56,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:56,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:56,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:56,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:56,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:56,612 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:38:56,613 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:38:56,615 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:38:56,616 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:38:56,618 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:38:56,619 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:38:56,623 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:38:56,624 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:38:56,629 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:38:56,631 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:38:56,635 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:38:56,637 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:38:56,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:56,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:56,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:56,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:56,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:56,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:56,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:56,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:56,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:56,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:56,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:56,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:56,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:56,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:56,666 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:38:57,110 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:38:57,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:38:57,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2021-11-07 01:38:57,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539402865] [2021-11-07 01:38:57,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 01:38:57,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:57,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 01:38:57,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-11-07 01:38:57,113 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 24 states, 23 states have (on average 6.3478260869565215) internal successors, (146), 23 states have internal predecessors, (146), 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) [2021-11-07 01:38:57,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:57,237 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2021-11-07 01:38:57,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:38:57,238 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.3478260869565215) internal successors, (146), 23 states have internal predecessors, (146), 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 73 [2021-11-07 01:38:57,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:57,246 INFO L225 Difference]: With dead ends: 171 [2021-11-07 01:38:57,246 INFO L226 Difference]: Without dead ends: 170 [2021-11-07 01:38:57,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 180 SyntacticMatches, 20 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-11-07 01:38:57,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-07 01:38:57,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 159. [2021-11-07 01:38:57,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 157 states have (on average 1.0828025477707006) internal successors, (170), 158 states have internal predecessors, (170), 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) [2021-11-07 01:38:57,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 170 transitions. [2021-11-07 01:38:57,280 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 170 transitions. Word has length 73 [2021-11-07 01:38:57,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:57,283 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 170 transitions. [2021-11-07 01:38:57,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.3478260869565215) internal successors, (146), 23 states have internal predecessors, (146), 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) [2021-11-07 01:38:57,284 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 170 transitions. [2021-11-07 01:38:57,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:38:57,290 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:57,291 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1] [2021-11-07 01:38:57,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:57,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:38:57,515 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-07 01:38:57,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:57,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1210967059, now seen corresponding path program 3 times [2021-11-07 01:38:57,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:57,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685679358] [2021-11-07 01:38:57,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:57,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:57,667 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:57,667 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:57,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685679358] [2021-11-07 01:38:57,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685679358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:38:57,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696542687] [2021-11-07 01:38:57,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:38:57,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:38:57,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:38:57,668 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:38:57,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 01:38:57,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:38:57,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:38:57,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:38:57,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:58,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:58,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696542687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:58,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1094200986] [2021-11-07 01:38:58,458 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-07 01:38:58,458 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:38:58,458 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:38:58,458 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:38:58,459 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:38:58,468 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:38:58,470 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:38:58,473 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-07 01:38:58,475 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:38:58,477 INFO L180 QuantifierPusher]: treesize reduction 10, result has 65.5 percent of original size [2021-11-07 01:38:58,488 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:38:58,492 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-07 01:38:58,493 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 01:38:58,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:58,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:58,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:58,515 INFO L180 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size [2021-11-07 01:38:58,518 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:38:58,523 INFO L180 QuantifierPusher]: treesize reduction 7, result has 87.7 percent of original size [2021-11-07 01:38:58,525 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:38:58,527 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.1 percent of original size [2021-11-07 01:38:58,530 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-07 01:38:58,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:58,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:58,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:58,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:58,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:58,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:58,547 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:38:58,548 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:38:58,550 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:38:58,551 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:38:58,554 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:38:58,555 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:38:58,557 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:38:58,560 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:38:58,566 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:38:58,567 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:38:58,570 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:38:58,572 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:38:58,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:58,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:58,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:58,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:58,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:58,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:58,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:58,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:38:58,593 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:38:59,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:38:59,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:38:59,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2021-11-07 01:38:59,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744540254] [2021-11-07 01:38:59,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 01:38:59,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:59,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 01:38:59,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-11-07 01:38:59,020 INFO L87 Difference]: Start difference. First operand 159 states and 170 transitions. Second operand has 24 states, 23 states have (on average 6.608695652173913) internal successors, (152), 23 states have internal predecessors, (152), 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) [2021-11-07 01:38:59,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:59,103 INFO L93 Difference]: Finished difference Result 163 states and 174 transitions. [2021-11-07 01:38:59,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:38:59,104 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.608695652173913) internal successors, (152), 23 states have internal predecessors, (152), 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 76 [2021-11-07 01:38:59,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:59,106 INFO L225 Difference]: With dead ends: 163 [2021-11-07 01:38:59,106 INFO L226 Difference]: Without dead ends: 162 [2021-11-07 01:38:59,107 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 188 SyntacticMatches, 21 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-11-07 01:38:59,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-07 01:38:59,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-11-07 01:38:59,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 160 states have (on average 1.0125) internal successors, (162), 161 states have internal predecessors, (162), 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) [2021-11-07 01:38:59,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2021-11-07 01:38:59,119 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 76 [2021-11-07 01:38:59,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:59,119 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2021-11-07 01:38:59,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.608695652173913) internal successors, (152), 23 states have internal predecessors, (152), 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) [2021-11-07 01:38:59,120 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2021-11-07 01:38:59,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-07 01:38:59,123 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:59,123 INFO L513 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1] [2021-11-07 01:38:59,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:59,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:38:59,339 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)] === [2021-11-07 01:38:59,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:59,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1006144353, now seen corresponding path program 4 times [2021-11-07 01:38:59,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:59,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664847677] [2021-11-07 01:38:59,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:59,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:59,716 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:59,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664847677] [2021-11-07 01:38:59,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664847677] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:38:59,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237356264] [2021-11-07 01:38:59,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:38:59,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:38:59,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:38:59,731 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:38:59,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 01:38:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:59,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 01:38:59,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:00,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:01,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237356264] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:01,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [457760749] [2021-11-07 01:39:01,548 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-07 01:39:01,548 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:39:01,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:39:01,549 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:39:01,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:39:01,552 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:39:01,553 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:39:01,559 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-07 01:39:01,560 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:39:01,562 INFO L180 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size [2021-11-07 01:39:01,567 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:39:01,568 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-07 01:39:01,570 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 01:39:01,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:01,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:01,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:01,587 INFO L180 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size [2021-11-07 01:39:01,589 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:39:01,591 INFO L180 QuantifierPusher]: treesize reduction 7, result has 87.7 percent of original size [2021-11-07 01:39:01,592 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:39:01,594 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.1 percent of original size [2021-11-07 01:39:01,597 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-07 01:39:01,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:01,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:01,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:01,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:01,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:01,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:01,611 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:39:01,612 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:39:01,613 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:39:01,614 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:39:01,616 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:39:01,617 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:39:01,619 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:39:01,620 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:39:01,623 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:39:01,626 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:39:01,628 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:39:01,629 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:39:01,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:01,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:01,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:01,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:01,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:01,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:01,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:01,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:01,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:01,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:01,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:01,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:01,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:01,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:01,675 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:39:02,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:39:02,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:39:02,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2021-11-07 01:39:02,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009603586] [2021-11-07 01:39:02,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 01:39:02,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:39:02,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 01:39:02,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1147, Invalid=1715, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 01:39:02,622 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand has 48 states, 47 states have (on average 6.680851063829787) internal successors, (314), 47 states have internal predecessors, (314), 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) [2021-11-07 01:39:02,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:02,811 INFO L93 Difference]: Finished difference Result 351 states and 374 transitions. [2021-11-07 01:39:02,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 01:39:02,811 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 6.680851063829787) internal successors, (314), 47 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-11-07 01:39:02,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:02,814 INFO L225 Difference]: With dead ends: 351 [2021-11-07 01:39:02,814 INFO L226 Difference]: Without dead ends: 350 [2021-11-07 01:39:02,817 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 396 SyntacticMatches, 44 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3487 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1147, Invalid=1715, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 01:39:02,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-11-07 01:39:02,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 327. [2021-11-07 01:39:02,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 325 states have (on average 1.0769230769230769) internal successors, (350), 326 states have internal predecessors, (350), 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) [2021-11-07 01:39:02,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 350 transitions. [2021-11-07 01:39:02,842 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 350 transitions. Word has length 157 [2021-11-07 01:39:02,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:02,844 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 350 transitions. [2021-11-07 01:39:02,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 6.680851063829787) internal successors, (314), 47 states have internal predecessors, (314), 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) [2021-11-07 01:39:02,845 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 350 transitions. [2021-11-07 01:39:02,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-07 01:39:02,852 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:02,852 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 1, 1] [2021-11-07 01:39:02,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:03,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-11-07 01:39:03,067 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-07 01:39:03,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:03,068 INFO L85 PathProgramCache]: Analyzing trace with hash -530294803, now seen corresponding path program 4 times [2021-11-07 01:39:03,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:39:03,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082077159] [2021-11-07 01:39:03,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:03,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:39:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1727 backedges. 0 proven. 1727 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:03,437 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:39:03,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082077159] [2021-11-07 01:39:03,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082077159] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:39:03,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152623596] [2021-11-07 01:39:03,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:39:03,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:39:03,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:39:03,438 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:39:03,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 01:39:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:03,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 01:39:03,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1727 backedges. 0 proven. 1727 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:04,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1727 backedges. 0 proven. 1727 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:05,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152623596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:05,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [835575933] [2021-11-07 01:39:05,268 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-07 01:39:05,268 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:39:05,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:39:05,269 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:39:05,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:39:05,272 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:39:05,273 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:39:05,275 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-07 01:39:05,276 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:39:05,277 INFO L180 QuantifierPusher]: treesize reduction 10, result has 65.5 percent of original size [2021-11-07 01:39:05,278 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:39:05,279 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-07 01:39:05,280 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 01:39:05,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:05,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:05,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:05,290 INFO L180 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size [2021-11-07 01:39:05,292 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:39:05,293 INFO L180 QuantifierPusher]: treesize reduction 7, result has 87.7 percent of original size [2021-11-07 01:39:05,295 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:39:05,297 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.1 percent of original size [2021-11-07 01:39:05,298 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-07 01:39:05,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:05,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:05,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:05,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:05,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:05,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:05,317 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:39:05,318 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:39:05,319 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:39:05,320 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:39:05,321 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:39:05,322 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:39:05,325 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:39:05,326 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:39:05,328 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:39:05,329 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:39:05,331 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:39:05,332 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:39:05,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:05,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:05,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:05,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:05,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:05,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:05,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:05,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:05,351 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:39:06,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:39:06,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:39:06,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2021-11-07 01:39:06,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855508591] [2021-11-07 01:39:06,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 01:39:06,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:39:06,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 01:39:06,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1147, Invalid=1715, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 01:39:06,345 INFO L87 Difference]: Start difference. First operand 327 states and 350 transitions. Second operand has 48 states, 47 states have (on average 6.808510638297872) internal successors, (320), 47 states have internal predecessors, (320), 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) [2021-11-07 01:39:06,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:06,519 INFO L93 Difference]: Finished difference Result 331 states and 354 transitions. [2021-11-07 01:39:06,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 01:39:06,520 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 6.808510638297872) internal successors, (320), 47 states have internal predecessors, (320), 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 160 [2021-11-07 01:39:06,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:06,522 INFO L225 Difference]: With dead ends: 331 [2021-11-07 01:39:06,522 INFO L226 Difference]: Without dead ends: 330 [2021-11-07 01:39:06,524 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 404 SyntacticMatches, 45 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3557 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1147, Invalid=1715, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 01:39:06,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-07 01:39:06,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2021-11-07 01:39:06,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 328 states have (on average 1.0060975609756098) internal successors, (330), 329 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) [2021-11-07 01:39:06,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 330 transitions. [2021-11-07 01:39:06,535 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 330 transitions. Word has length 160 [2021-11-07 01:39:06,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:06,536 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 330 transitions. [2021-11-07 01:39:06,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 6.808510638297872) internal successors, (320), 47 states have internal predecessors, (320), 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) [2021-11-07 01:39:06,537 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 330 transitions. [2021-11-07 01:39:06,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-11-07 01:39:06,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:06,542 INFO L513 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 46, 46, 1, 1] [2021-11-07 01:39:06,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:06,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:39:06,759 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-07 01:39:06,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:06,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1034490721, now seen corresponding path program 5 times [2021-11-07 01:39:06,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:39:06,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626649279] [2021-11-07 01:39:06,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:06,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:39:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:07,925 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:39:07,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626649279] [2021-11-07 01:39:07,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626649279] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:39:07,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138397682] [2021-11-07 01:39:07,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:39:07,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:39:07,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:39:07,931 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:39:07,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 01:39:08,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-07 01:39:08,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:39:08,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 01:39:08,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:09,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:12,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138397682] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:12,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1169776546] [2021-11-07 01:39:12,554 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-07 01:39:12,554 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:39:12,554 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:39:12,555 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:39:12,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:39:12,563 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:39:12,566 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:39:12,570 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-07 01:39:12,571 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:39:12,571 INFO L180 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size [2021-11-07 01:39:12,572 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:39:12,573 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-07 01:39:12,581 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 01:39:12,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:12,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:12,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:12,590 INFO L180 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size [2021-11-07 01:39:12,592 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:39:12,594 INFO L180 QuantifierPusher]: treesize reduction 7, result has 87.7 percent of original size [2021-11-07 01:39:12,595 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:39:12,597 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.1 percent of original size [2021-11-07 01:39:12,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-07 01:39:12,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:12,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:12,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:12,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:12,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:12,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:12,610 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:39:12,611 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:39:12,613 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:39:12,614 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:39:12,615 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:39:12,616 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:39:12,618 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:39:12,619 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:39:12,621 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:39:12,622 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:39:12,624 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:39:12,625 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:39:12,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:12,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:12,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:12,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:12,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:12,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:12,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:12,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:12,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:12,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:12,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:12,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:12,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:12,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:12,651 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:39:15,053 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:39:15,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:39:15,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 94 [2021-11-07 01:39:15,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749359800] [2021-11-07 01:39:15,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-07 01:39:15,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:39:15,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-07 01:39:15,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4579, Invalid=5723, Unknown=0, NotChecked=0, Total=10302 [2021-11-07 01:39:15,059 INFO L87 Difference]: Start difference. First operand 330 states and 330 transitions. Second operand has 96 states, 95 states have (on average 6.842105263157895) internal successors, (650), 95 states have internal predecessors, (650), 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) [2021-11-07 01:39:15,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:15,517 INFO L93 Difference]: Finished difference Result 711 states and 758 transitions. [2021-11-07 01:39:15,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-07 01:39:15,518 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 6.842105263157895) internal successors, (650), 95 states have internal predecessors, (650), 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 325 [2021-11-07 01:39:15,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:15,522 INFO L225 Difference]: With dead ends: 711 [2021-11-07 01:39:15,522 INFO L226 Difference]: Without dead ends: 710 [2021-11-07 01:39:15,526 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1020 GetRequests, 828 SyntacticMatches, 92 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13903 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=4579, Invalid=5723, Unknown=0, NotChecked=0, Total=10302 [2021-11-07 01:39:15,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-11-07 01:39:15,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 663. [2021-11-07 01:39:15,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 661 states have (on average 1.0741301059001513) internal successors, (710), 662 states have internal predecessors, (710), 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) [2021-11-07 01:39:15,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 710 transitions. [2021-11-07 01:39:15,549 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 710 transitions. Word has length 325 [2021-11-07 01:39:15,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:15,550 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 710 transitions. [2021-11-07 01:39:15,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 6.842105263157895) internal successors, (650), 95 states have internal predecessors, (650), 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) [2021-11-07 01:39:15,550 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 710 transitions. [2021-11-07 01:39:15,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-11-07 01:39:15,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:15,556 INFO L513 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 46, 46, 46, 1, 1] [2021-11-07 01:39:15,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:15,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:39:15,783 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-07 01:39:15,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:15,783 INFO L85 PathProgramCache]: Analyzing trace with hash 2122764269, now seen corresponding path program 5 times [2021-11-07 01:39:15,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:39:15,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326565269] [2021-11-07 01:39:15,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:15,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:39:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7475 backedges. 0 proven. 7475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:16,948 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:39:16,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326565269] [2021-11-07 01:39:16,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326565269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:39:16,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389912583] [2021-11-07 01:39:16,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:39:16,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:39:16,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:39:16,955 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:39:16,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 01:39:17,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-07 01:39:17,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:39:17,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 01:39:17,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7475 backedges. 0 proven. 7475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:18,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:21,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7475 backedges. 0 proven. 7475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:21,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389912583] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:21,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2035943802] [2021-11-07 01:39:21,499 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-07 01:39:21,500 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:39:21,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:39:21,500 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:39:21,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:39:21,521 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:39:21,522 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:39:21,523 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-07 01:39:21,524 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:39:21,529 INFO L180 QuantifierPusher]: treesize reduction 10, result has 65.5 percent of original size [2021-11-07 01:39:21,529 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:39:21,530 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-07 01:39:21,531 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 01:39:21,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:21,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:21,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:21,562 INFO L180 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size [2021-11-07 01:39:21,568 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:39:21,570 INFO L180 QuantifierPusher]: treesize reduction 7, result has 87.7 percent of original size [2021-11-07 01:39:21,571 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:39:21,574 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.1 percent of original size [2021-11-07 01:39:21,576 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-07 01:39:21,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:21,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:21,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:21,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:21,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:21,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:21,599 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:39:21,600 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:39:21,601 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:39:21,602 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:39:21,605 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:39:21,606 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:39:21,613 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:39:21,623 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:39:21,625 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:39:21,626 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:39:21,628 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:39:21,629 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:39:21,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:21,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:21,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:21,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:21,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:21,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:21,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:21,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:21,645 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:39:24,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:39:24,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:39:24,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 94 [2021-11-07 01:39:24,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137080863] [2021-11-07 01:39:24,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-07 01:39:24,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:39:24,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-07 01:39:24,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4579, Invalid=5723, Unknown=0, NotChecked=0, Total=10302 [2021-11-07 01:39:24,124 INFO L87 Difference]: Start difference. First operand 663 states and 710 transitions. Second operand has 96 states, 95 states have (on average 6.905263157894737) internal successors, (656), 95 states have internal predecessors, (656), 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) [2021-11-07 01:39:24,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:24,523 INFO L93 Difference]: Finished difference Result 667 states and 714 transitions. [2021-11-07 01:39:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-07 01:39:24,523 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 6.905263157894737) internal successors, (656), 95 states have internal predecessors, (656), 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 328 [2021-11-07 01:39:24,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:24,528 INFO L225 Difference]: With dead ends: 667 [2021-11-07 01:39:24,528 INFO L226 Difference]: Without dead ends: 666 [2021-11-07 01:39:24,532 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1029 GetRequests, 836 SyntacticMatches, 93 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14045 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=4579, Invalid=5723, Unknown=0, NotChecked=0, Total=10302 [2021-11-07 01:39:24,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-11-07 01:39:24,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 666. [2021-11-07 01:39:24,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 664 states have (on average 1.0030120481927711) internal successors, (666), 665 states have internal predecessors, (666), 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) [2021-11-07 01:39:24,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 666 transitions. [2021-11-07 01:39:24,552 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 666 transitions. Word has length 328 [2021-11-07 01:39:24,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:24,553 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 666 transitions. [2021-11-07 01:39:24,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 6.905263157894737) internal successors, (656), 95 states have internal predecessors, (656), 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) [2021-11-07 01:39:24,554 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 666 transitions. [2021-11-07 01:39:24,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 662 [2021-11-07 01:39:24,573 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:24,574 INFO L513 BasicCegarLoop]: trace histogram [95, 94, 94, 94, 94, 94, 94, 1, 1] [2021-11-07 01:39:24,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:24,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:39:24,799 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-07 01:39:24,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:24,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1276257121, now seen corresponding path program 6 times [2021-11-07 01:39:24,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:39:24,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729611542] [2021-11-07 01:39:24,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:24,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:39:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:28,337 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:39:28,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729611542] [2021-11-07 01:39:28,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729611542] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:39:28,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35606519] [2021-11-07 01:39:28,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:39:28,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:39:28,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:39:28,338 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:39:28,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 01:39:29,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:39:29,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:39:29,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 1234 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-07 01:39:29,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:30,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:40,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35606519] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:40,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1341849723] [2021-11-07 01:39:40,754 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-07 01:39:40,754 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:39:40,754 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:39:40,755 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:39:40,755 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:39:40,774 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:39:40,775 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:39:40,778 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-07 01:39:40,779 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:39:40,780 INFO L180 QuantifierPusher]: treesize reduction 10, result has 65.5 percent of original size [2021-11-07 01:39:40,781 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:39:40,782 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-07 01:39:40,783 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 01:39:40,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:40,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:40,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:40,792 INFO L180 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size [2021-11-07 01:39:40,793 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:39:40,795 INFO L180 QuantifierPusher]: treesize reduction 7, result has 87.7 percent of original size [2021-11-07 01:39:40,796 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:39:40,798 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.1 percent of original size [2021-11-07 01:39:40,799 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-07 01:39:40,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:40,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:40,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:40,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:40,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:40,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:40,811 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:39:40,812 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:39:40,813 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:39:40,814 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:39:40,815 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:39:40,816 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:39:40,819 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:39:40,820 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:39:40,822 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:39:40,823 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:39:40,825 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:39:40,826 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:39:40,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:40,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:40,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:40,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:40,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:40,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:40,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:40,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:40,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:40,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:40,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:40,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:39:40,850 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:39:49,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:39:49,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:39:49,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 190 [2021-11-07 01:39:49,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810840575] [2021-11-07 01:39:49,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-11-07 01:39:49,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:39:49,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-11-07 01:39:49,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18358, Invalid=20648, Unknown=0, NotChecked=0, Total=39006 [2021-11-07 01:39:49,352 INFO L87 Difference]: Start difference. First operand 666 states and 666 transitions. Second operand has 192 states, 191 states have (on average 6.9214659685863875) internal successors, (1322), 191 states have internal predecessors, (1322), 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) [2021-11-07 01:39:51,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:51,597 INFO L93 Difference]: Finished difference Result 1431 states and 1526 transitions. [2021-11-07 01:39:51,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-07 01:39:51,598 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 191 states have (on average 6.9214659685863875) internal successors, (1322), 191 states have internal predecessors, (1322), 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 661 [2021-11-07 01:39:51,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:51,606 INFO L225 Difference]: With dead ends: 1431 [2021-11-07 01:39:51,606 INFO L226 Difference]: Without dead ends: 1430 [2021-11-07 01:39:51,611 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2076 GetRequests, 1692 SyntacticMatches, 188 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55376 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=18358, Invalid=20648, Unknown=0, NotChecked=0, Total=39006 [2021-11-07 01:39:51,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2021-11-07 01:39:51,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1335. [2021-11-07 01:39:51,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1333 states have (on average 1.072768192048012) internal successors, (1430), 1334 states have internal predecessors, (1430), 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) [2021-11-07 01:39:51,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1430 transitions. [2021-11-07 01:39:51,648 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1430 transitions. Word has length 661 [2021-11-07 01:39:51,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:51,649 INFO L470 AbstractCegarLoop]: Abstraction has 1335 states and 1430 transitions. [2021-11-07 01:39:51,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 191 states have (on average 6.9214659685863875) internal successors, (1322), 191 states have internal predecessors, (1322), 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) [2021-11-07 01:39:51,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1430 transitions. [2021-11-07 01:39:51,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2021-11-07 01:39:51,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:51,656 INFO L513 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 94, 94, 94, 1, 1] [2021-11-07 01:39:51,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:51,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-11-07 01:39:51,870 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-07 01:39:51,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:51,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1925431277, now seen corresponding path program 6 times [2021-11-07 01:39:51,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:39:51,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751338619] [2021-11-07 01:39:51,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:51,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:39:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 31067 backedges. 0 proven. 31067 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:55,366 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:39:55,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751338619] [2021-11-07 01:39:55,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751338619] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:39:55,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261254494] [2021-11-07 01:39:55,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:39:55,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:39:55,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:39:55,387 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:39:55,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 01:39:56,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:39:56,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:39:56,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 1239 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-07 01:39:56,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:58,308 INFO L134 CoverageAnalysis]: Checked inductivity of 31067 backedges. 0 proven. 31067 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:58,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 31067 backedges. 0 proven. 31067 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:08,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261254494] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:40:08,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1685012007] [2021-11-07 01:40:08,719 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-07 01:40:08,719 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:40:08,720 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:40:08,720 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:40:08,720 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:40:08,733 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:08,734 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:40:08,736 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-07 01:40:08,737 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:40:08,738 INFO L180 QuantifierPusher]: treesize reduction 10, result has 65.5 percent of original size [2021-11-07 01:40:08,739 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:40:08,740 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-07 01:40:08,741 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 01:40:08,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:08,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:08,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:08,765 INFO L180 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size [2021-11-07 01:40:08,766 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:40:08,768 INFO L180 QuantifierPusher]: treesize reduction 7, result has 87.7 percent of original size [2021-11-07 01:40:08,769 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:40:08,776 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.1 percent of original size [2021-11-07 01:40:08,778 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-07 01:40:08,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:08,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:08,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:08,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:08,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:08,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:08,796 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:40:08,797 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:40:08,798 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:40:08,799 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:40:08,800 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:40:08,801 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:40:08,803 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:40:08,807 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:40:08,810 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:40:08,811 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:40:08,813 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:40:08,814 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:40:08,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:08,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:08,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:08,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:08,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:08,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:08,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:08,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:40:08,830 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:40:17,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:40:17,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:40:17,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 190 [2021-11-07 01:40:17,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323751700] [2021-11-07 01:40:17,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-11-07 01:40:17,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:40:17,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-11-07 01:40:17,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18355, Invalid=20651, Unknown=0, NotChecked=0, Total=39006 [2021-11-07 01:40:17,223 INFO L87 Difference]: Start difference. First operand 1335 states and 1430 transitions. Second operand has 192 states, 191 states have (on average 6.952879581151833) internal successors, (1328), 191 states have internal predecessors, (1328), 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) [2021-11-07 01:40:18,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:18,753 INFO L93 Difference]: Finished difference Result 1339 states and 1434 transitions. [2021-11-07 01:40:18,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-07 01:40:18,754 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 191 states have (on average 6.952879581151833) internal successors, (1328), 191 states have internal predecessors, (1328), 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 664 [2021-11-07 01:40:18,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:18,762 INFO L225 Difference]: With dead ends: 1339 [2021-11-07 01:40:18,763 INFO L226 Difference]: Without dead ends: 1338 [2021-11-07 01:40:18,766 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2085 GetRequests, 1700 SyntacticMatches, 189 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55757 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=18355, Invalid=20651, Unknown=0, NotChecked=0, Total=39006 [2021-11-07 01:40:18,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-11-07 01:40:18,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1338. [2021-11-07 01:40:18,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1336 states have (on average 1.001497005988024) internal successors, (1338), 1337 states have internal predecessors, (1338), 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) [2021-11-07 01:40:18,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 1338 transitions. [2021-11-07 01:40:18,801 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 1338 transitions. Word has length 664 [2021-11-07 01:40:18,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:18,802 INFO L470 AbstractCegarLoop]: Abstraction has 1338 states and 1338 transitions. [2021-11-07 01:40:18,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 191 states have (on average 6.952879581151833) internal successors, (1328), 191 states have internal predecessors, (1328), 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) [2021-11-07 01:40:18,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 1338 transitions. [2021-11-07 01:40:18,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1334 [2021-11-07 01:40:18,818 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:18,819 INFO L513 BasicCegarLoop]: trace histogram [191, 190, 190, 190, 190, 190, 190, 1, 1] [2021-11-07 01:40:18,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:19,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-11-07 01:40:19,027 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-07 01:40:19,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:19,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1963213665, now seen corresponding path program 7 times [2021-11-07 01:40:19,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:40:19,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069348903] [2021-11-07 01:40:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:19,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:40:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 126065 backedges. 0 proven. 126065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:31,685 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:40:31,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069348903] [2021-11-07 01:40:31,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069348903] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:40:31,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25583488] [2021-11-07 01:40:31,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:40:31,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:40:31,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:40:31,686 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:40:31,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 01:40:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:33,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 2482 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-07 01:40:33,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 126065 backedges. 0 proven. 126065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:36,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 126065 backedges. 0 proven. 126065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:13,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25583488] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:41:13,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1695751657] [2021-11-07 01:41:13,743 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-07 01:41:13,743 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:41:13,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:41:13,744 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:41:13,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:41:13,751 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:41:13,752 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:41:13,754 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-07 01:41:13,754 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:41:13,755 INFO L180 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size [2021-11-07 01:41:13,755 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:41:13,756 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-07 01:41:13,761 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 01:41:13,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:41:13,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:41:13,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:41:13,784 INFO L180 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size [2021-11-07 01:41:13,785 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:41:13,787 INFO L180 QuantifierPusher]: treesize reduction 7, result has 87.7 percent of original size [2021-11-07 01:41:13,788 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:41:13,803 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.1 percent of original size [2021-11-07 01:41:13,804 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-07 01:41:13,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:41:13,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:41:13,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:41:13,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:41:13,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:41:13,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:41:13,815 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:41:13,816 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:41:13,817 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:41:13,818 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:41:13,818 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:41:13,824 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:41:13,826 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:41:13,827 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:41:13,829 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:41:13,830 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:41:13,832 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:41:13,833 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:41:13,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:41:13,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:41:13,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:41:13,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:41:13,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:41:13,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:41:13,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:41:13,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:41:13,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:41:13,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:41:13,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:41:13,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:41:13,854 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:41:44,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:41:44,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:41:44,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 382 [2021-11-07 01:41:44,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080520826] [2021-11-07 01:41:44,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2021-11-07 01:41:44,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:41:44,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2021-11-07 01:41:44,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73558, Invalid=78152, Unknown=0, NotChecked=0, Total=151710 [2021-11-07 01:41:44,567 INFO L87 Difference]: Start difference. First operand 1338 states and 1338 transitions. Second operand has 384 states, 383 states have (on average 6.960835509138382) internal successors, (2666), 383 states have internal predecessors, (2666), 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) [2021-11-07 01:41:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:56,932 INFO L93 Difference]: Finished difference Result 2871 states and 3062 transitions. [2021-11-07 01:41:56,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-07 01:41:56,934 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 383 states have (on average 6.960835509138382) internal successors, (2666), 383 states have internal predecessors, (2666), 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 1333 [2021-11-07 01:41:56,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:56,951 INFO L225 Difference]: With dead ends: 2871 [2021-11-07 01:41:56,952 INFO L226 Difference]: Without dead ends: 2870 [2021-11-07 01:41:56,966 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4188 GetRequests, 3420 SyntacticMatches, 380 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221360 ImplicationChecksByTransitivity, 75.8s TimeCoverageRelationStatistics Valid=73558, Invalid=78152, Unknown=0, NotChecked=0, Total=151710 [2021-11-07 01:41:56,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2021-11-07 01:41:57,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 2679. [2021-11-07 01:41:57,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2679 states, 2677 states have (on average 1.0720956294359358) internal successors, (2870), 2678 states have internal predecessors, (2870), 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) [2021-11-07 01:41:57,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2679 states to 2679 states and 2870 transitions. [2021-11-07 01:41:57,044 INFO L78 Accepts]: Start accepts. Automaton has 2679 states and 2870 transitions. Word has length 1333 [2021-11-07 01:41:57,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:57,046 INFO L470 AbstractCegarLoop]: Abstraction has 2679 states and 2870 transitions. [2021-11-07 01:41:57,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 383 states have (on average 6.960835509138382) internal successors, (2666), 383 states have internal predecessors, (2666), 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) [2021-11-07 01:41:57,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2679 states and 2870 transitions. [2021-11-07 01:41:57,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1337 [2021-11-07 01:41:57,072 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:57,072 INFO L513 BasicCegarLoop]: trace histogram [191, 191, 191, 191, 190, 190, 190, 1, 1] [2021-11-07 01:41:57,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:57,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:41:57,293 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-07 01:41:57,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:57,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1528668141, now seen corresponding path program 7 times [2021-11-07 01:41:57,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:41:57,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368684708] [2021-11-07 01:41:57,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:57,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:41:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 126635 backedges. 0 proven. 126635 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:10,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:42:10,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368684708] [2021-11-07 01:42:10,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368684708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:42:10,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170911893] [2021-11-07 01:42:10,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:42:10,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:42:10,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:42:10,325 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:42:10,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 01:42:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:12,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 2487 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-07 01:42:12,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 126635 backedges. 0 proven. 126635 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:15,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 126635 backedges. 0 proven. 126635 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:55,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170911893] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:55,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [501035678] [2021-11-07 01:42:55,248 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-07 01:42:55,248 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:42:55,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:42:55,249 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:42:55,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:42:55,253 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:42:55,254 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:42:55,256 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-07 01:42:55,257 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:42:55,257 INFO L180 QuantifierPusher]: treesize reduction 10, result has 65.5 percent of original size [2021-11-07 01:42:55,258 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:42:55,259 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-07 01:42:55,260 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 01:42:55,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:42:55,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:42:55,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:42:55,278 INFO L180 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size [2021-11-07 01:42:55,279 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:42:55,281 INFO L180 QuantifierPusher]: treesize reduction 7, result has 87.7 percent of original size [2021-11-07 01:42:55,282 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:42:55,284 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.1 percent of original size [2021-11-07 01:42:55,285 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-07 01:42:55,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:42:55,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:42:55,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:42:55,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:42:55,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:42:55,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:42:55,296 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:42:55,297 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:42:55,298 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:42:55,299 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:42:55,300 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:42:55,301 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:42:55,303 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:42:55,304 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:42:55,306 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:42:55,307 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:42:55,309 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:42:55,310 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:42:55,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:42:55,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:42:55,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:42:55,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:42:55,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:42:55,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:42:55,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:42:55,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:42:55,326 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:43:26,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:43:26,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:43:26,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 382 [2021-11-07 01:43:26,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297805737] [2021-11-07 01:43:26,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2021-11-07 01:43:26,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:26,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2021-11-07 01:43:26,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73555, Invalid=78155, Unknown=0, NotChecked=0, Total=151710 [2021-11-07 01:43:26,771 INFO L87 Difference]: Start difference. First operand 2679 states and 2870 transitions. Second operand has 384 states, 383 states have (on average 6.976501305483029) internal successors, (2672), 383 states have internal predecessors, (2672), 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) [2021-11-07 01:43:34,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:34,728 INFO L93 Difference]: Finished difference Result 2683 states and 2874 transitions. [2021-11-07 01:43:34,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-07 01:43:34,729 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 383 states have (on average 6.976501305483029) internal successors, (2672), 383 states have internal predecessors, (2672), 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 1336 [2021-11-07 01:43:34,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:34,743 INFO L225 Difference]: With dead ends: 2683 [2021-11-07 01:43:34,743 INFO L226 Difference]: Without dead ends: 2682 [2021-11-07 01:43:34,754 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4197 GetRequests, 3428 SyntacticMatches, 381 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222125 ImplicationChecksByTransitivity, 79.3s TimeCoverageRelationStatistics Valid=73555, Invalid=78155, Unknown=0, NotChecked=0, Total=151710 [2021-11-07 01:43:34,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-11-07 01:43:34,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 2682. [2021-11-07 01:43:34,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2682 states, 2680 states have (on average 1.0007462686567163) internal successors, (2682), 2681 states have internal predecessors, (2682), 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) [2021-11-07 01:43:34,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2682 states to 2682 states and 2682 transitions. [2021-11-07 01:43:34,821 INFO L78 Accepts]: Start accepts. Automaton has 2682 states and 2682 transitions. Word has length 1336 [2021-11-07 01:43:34,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:34,822 INFO L470 AbstractCegarLoop]: Abstraction has 2682 states and 2682 transitions. [2021-11-07 01:43:34,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 383 states have (on average 6.976501305483029) internal successors, (2672), 383 states have internal predecessors, (2672), 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) [2021-11-07 01:43:34,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2682 states and 2682 transitions. [2021-11-07 01:43:34,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2678 [2021-11-07 01:43:34,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:34,875 INFO L513 BasicCegarLoop]: trace histogram [383, 382, 382, 382, 382, 382, 382, 1, 1] [2021-11-07 01:43:34,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:35,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:43:35,103 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-07 01:43:35,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:35,103 INFO L85 PathProgramCache]: Analyzing trace with hash -144145567, now seen corresponding path program 8 times [2021-11-07 01:43:35,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:35,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601476686] [2021-11-07 01:43:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:35,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 510161 backedges. 0 proven. 510161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:24,455 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:24,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601476686] [2021-11-07 01:44:24,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601476686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:44:24,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473092080] [2021-11-07 01:44:24,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:44:24,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:44:24,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:44:24,456 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:44:24,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc631d8-aee7-4caf-81f7-84a09fe2f4fd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 01:44:32,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 383 check-sat command(s) [2021-11-07 01:44:32,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:44:32,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 4978 conjuncts, 384 conjunts are in the unsatisfiable core [2021-11-07 01:44:32,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 510161 backedges. 0 proven. 510161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:38,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 510161 backedges. 0 proven. 510161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:02,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473092080] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:02,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2131095867] [2021-11-07 01:47:02,730 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-07 01:47:02,730 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:47:02,730 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:47:02,730 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:47:02,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:47:02,733 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:47:02,734 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:47:02,736 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-07 01:47:02,736 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:47:02,737 INFO L180 QuantifierPusher]: treesize reduction 10, result has 65.5 percent of original size [2021-11-07 01:47:02,737 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:47:02,738 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-07 01:47:02,739 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 01:47:02,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:47:02,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:47:02,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:47:02,759 INFO L180 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size [2021-11-07 01:47:02,761 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:47:02,762 INFO L180 QuantifierPusher]: treesize reduction 7, result has 87.7 percent of original size [2021-11-07 01:47:02,763 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:47:02,764 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.1 percent of original size [2021-11-07 01:47:02,765 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-07 01:47:02,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:47:02,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:47:02,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:47:02,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:47:02,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:47:02,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:47:02,778 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:47:02,779 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:47:02,780 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:47:02,781 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:47:02,783 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:47:02,787 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:47:02,789 INFO L180 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-11-07 01:47:02,790 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:47:02,792 INFO L180 QuantifierPusher]: treesize reduction 3, result has 88.9 percent of original size [2021-11-07 01:47:02,793 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:47:02,795 INFO L180 QuantifierPusher]: treesize reduction 8, result has 76.5 percent of original size [2021-11-07 01:47:02,796 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-07 01:47:02,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:47:02,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:47:02,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:47:02,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:47:02,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:47:02,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:47:02,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:47:02,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:47:02,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:47:02,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:47:02,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:47:02,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:47:02,820 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:49:02,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:49:02,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:49:02,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [383, 383, 383] total 766 [2021-11-07 01:49:02,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27150691] [2021-11-07 01:49:03,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 768 states [2021-11-07 01:49:03,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:49:03,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 768 interpolants. [2021-11-07 01:49:03,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294550, Invalid=303752, Unknown=0, NotChecked=0, Total=598302 [2021-11-07 01:49:03,070 INFO L87 Difference]: Start difference. First operand 2682 states and 2682 transitions. Second operand has 768 states, 767 states have (on average 6.980443285528032) internal successors, (5354), 767 states have internal predecessors, (5354), 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)