./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/AliasDarteFeautrierGonnord-SAS2010-random1d-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/AliasDarteFeautrierGonnord-SAS2010-random1d-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7 --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 47d7aa734a1bf75c79acf2b3acca3677f12d2522fb1fc624c15ccfe9b5a8438a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:51:51,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:51:51,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:51:51,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:51:51,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:51:51,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:51:51,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:51:51,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:51:51,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:51:51,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:51:51,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:51:51,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:51:51,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:51:51,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:51:51,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:51:51,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:51:51,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:51:51,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:51:51,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:51:51,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:51:51,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:51:51,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:51:51,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:51:51,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:51:51,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:51:51,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:51:51,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:51:51,479 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:51:51,479 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:51:51,481 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:51:51,481 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:51:51,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:51:51,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:51:51,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:51:51,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:51:51,487 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:51:51,488 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:51:51,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:51:51,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:51:51,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:51:51,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:51:51,492 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-25 18:51:51,524 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:51:51,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:51:51,525 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:51:51,525 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:51:51,526 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:51:51,526 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:51:51,527 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:51:51,527 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:51:51,528 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:51:51,528 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:51:51,529 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:51:51,529 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:51:51,529 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:51:51,530 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:51:51,530 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:51:51,531 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:51:51,531 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:51:51,532 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:51:51,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:51:51,533 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:51:51,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:51:51,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:51:51,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:51:51,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:51:51,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:51:51,535 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-25 18:51:51,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:51:51,536 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:51:51,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:51:51,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:51:51,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:51:51,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:51:51,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:51:51,539 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:51:51,539 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:51:51,540 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:51:51,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:51:51,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:51:51,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:51:51,541 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:51:51,542 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_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 47d7aa734a1bf75c79acf2b3acca3677f12d2522fb1fc624c15ccfe9b5a8438a [2021-11-25 18:51:51,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:51:51,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:51:51,867 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:51:51,869 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:51:51,870 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:51:51,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/termination-crafted-lit/AliasDarteFeautrierGonnord-SAS2010-random1d-2.c [2021-11-25 18:51:51,989 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/data/38e25d1ee/f27a7b66f8db4ebdae9d07683486649d/FLAG3a8c2dc91 [2021-11-25 18:51:52,530 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:51:52,531 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/sv-benchmarks/c/termination-crafted-lit/AliasDarteFeautrierGonnord-SAS2010-random1d-2.c [2021-11-25 18:51:52,544 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/data/38e25d1ee/f27a7b66f8db4ebdae9d07683486649d/FLAG3a8c2dc91 [2021-11-25 18:51:52,877 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/data/38e25d1ee/f27a7b66f8db4ebdae9d07683486649d [2021-11-25 18:51:52,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:51:52,884 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:51:52,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:51:52,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:51:52,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:51:52,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:51:52" (1/1) ... [2021-11-25 18:51:52,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@194cf97e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:52, skipping insertion in model container [2021-11-25 18:51:52,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:51:52" (1/1) ... [2021-11-25 18:51:52,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:51:52,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:51:53,108 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:51:53,128 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:51:53,153 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:51:53,166 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:51:53,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:53 WrapperNode [2021-11-25 18:51:53,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:51:53,170 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:51:53,171 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:51:53,171 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:51:53,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:53" (1/1) ... [2021-11-25 18:51:53,186 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:53" (1/1) ... [2021-11-25 18:51:53,209 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 30 [2021-11-25 18:51:53,210 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:51:53,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:51:53,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:51:53,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:51:53,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:53" (1/1) ... [2021-11-25 18:51:53,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:53" (1/1) ... [2021-11-25 18:51:53,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:53" (1/1) ... [2021-11-25 18:51:53,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:53" (1/1) ... [2021-11-25 18:51:53,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:53" (1/1) ... [2021-11-25 18:51:53,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:53" (1/1) ... [2021-11-25 18:51:53,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:53" (1/1) ... [2021-11-25 18:51:53,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:51:53,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:51:53,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:51:53,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:51:53,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:53" (1/1) ... [2021-11-25 18:51:53,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:51:53,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:51:53,297 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:51:53,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:51:53,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:51:53,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:51:53,434 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:51:53,436 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:51:53,609 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:51:53,642 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:51:53,642 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 18:51:53,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:51:53 BoogieIcfgContainer [2021-11-25 18:51:53,645 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:51:53,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:51:53,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:51:53,654 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:51:53,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:51:52" (1/3) ... [2021-11-25 18:51:53,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@518caf47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:51:53, skipping insertion in model container [2021-11-25 18:51:53,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:53" (2/3) ... [2021-11-25 18:51:53,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@518caf47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:51:53, skipping insertion in model container [2021-11-25 18:51:53,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:51:53" (3/3) ... [2021-11-25 18:51:53,657 INFO L111 eAbstractionObserver]: Analyzing ICFG AliasDarteFeautrierGonnord-SAS2010-random1d-2.c [2021-11-25 18:51:53,663 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:51:53,664 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-25 18:51:53,753 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:51:53,762 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 [2021-11-25 18:51:53,762 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-25 18:51:53,777 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:53,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 18:51:53,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:51:53,785 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 18:51:53,785 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)] === [2021-11-25 18:51:53,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:51:53,807 INFO L85 PathProgramCache]: Analyzing trace with hash 69427029, now seen corresponding path program 1 times [2021-11-25 18:51:53,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:51:53,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652456391] [2021-11-25 18:51:53,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:53,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:51:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:53,970 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:51:53,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652456391] [2021-11-25 18:51:53,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652456391] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:51:53,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:51:53,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:51:53,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516589453] [2021-11-25 18:51:53,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:51:53,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:51:53,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:51:54,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:51:54,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:51:54,020 INFO L87 Difference]: Start difference. First operand has 18 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:54,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:51:54,081 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-11-25 18:51:54,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:51:54,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-25 18:51:54,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:51:54,095 INFO L225 Difference]: With dead ends: 32 [2021-11-25 18:51:54,095 INFO L226 Difference]: Without dead ends: 26 [2021-11-25 18:51:54,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:51:54,104 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:51:54,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 23 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:51:54,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-25 18:51:54,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-11-25 18:51:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:54,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-11-25 18:51:54,146 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 5 [2021-11-25 18:51:54,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:51:54,147 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-11-25 18:51:54,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:54,148 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-11-25 18:51:54,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:51:54,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:51:54,149 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:51:54,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:51:54,150 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)] === [2021-11-25 18:51:54,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:51:54,151 INFO L85 PathProgramCache]: Analyzing trace with hash -2142729346, now seen corresponding path program 1 times [2021-11-25 18:51:54,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:51:54,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56289217] [2021-11-25 18:51:54,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:54,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:51:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:54,184 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:51:54,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56289217] [2021-11-25 18:51:54,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56289217] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:51:54,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:51:54,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:51:54,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722403009] [2021-11-25 18:51:54,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:51:54,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:51:54,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:51:54,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:51:54,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:51:54,190 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:54,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:51:54,225 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-11-25 18:51:54,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:51:54,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 18:51:54,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:51:54,227 INFO L225 Difference]: With dead ends: 40 [2021-11-25 18:51:54,228 INFO L226 Difference]: Without dead ends: 38 [2021-11-25 18:51:54,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:51:54,231 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:51:54,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 17 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:51:54,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-25 18:51:54,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-11-25 18:51:54,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:54,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-11-25 18:51:54,242 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 6 [2021-11-25 18:51:54,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:51:54,243 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-11-25 18:51:54,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:54,243 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-11-25 18:51:54,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 18:51:54,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:51:54,244 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:51:54,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:51:54,245 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:51:54,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:51:54,246 INFO L85 PathProgramCache]: Analyzing trace with hash -2000100226, now seen corresponding path program 1 times [2021-11-25 18:51:54,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:51:54,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31935116] [2021-11-25 18:51:54,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:54,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:51:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:54,279 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:51:54,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31935116] [2021-11-25 18:51:54,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31935116] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:51:54,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:51:54,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:51:54,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344719591] [2021-11-25 18:51:54,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:51:54,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:51:54,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:51:54,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:51:54,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:51:54,284 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:54,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:51:54,307 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2021-11-25 18:51:54,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:51:54,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 18:51:54,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:51:54,310 INFO L225 Difference]: With dead ends: 42 [2021-11-25 18:51:54,311 INFO L226 Difference]: Without dead ends: 41 [2021-11-25 18:51:54,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:51:54,314 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:51:54,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 22 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:51:54,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-25 18:51:54,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-11-25 18:51:54,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 38 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:54,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2021-11-25 18:51:54,324 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 7 [2021-11-25 18:51:54,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:51:54,324 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2021-11-25 18:51:54,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:54,325 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2021-11-25 18:51:54,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:51:54,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:51:54,326 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:51:54,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:51:54,327 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:51:54,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:51:54,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1873564800, now seen corresponding path program 1 times [2021-11-25 18:51:54,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:51:54,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112578938] [2021-11-25 18:51:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:54,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:51:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:54,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:54,385 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:51:54,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112578938] [2021-11-25 18:51:54,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112578938] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:51:54,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:51:54,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:51:54,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171950290] [2021-11-25 18:51:54,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:51:54,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:51:54,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:51:54,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:51:54,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:51:54,394 INFO L87 Difference]: Start difference. First operand 39 states and 50 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) [2021-11-25 18:51:54,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:51:54,417 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-11-25 18:51:54,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:51:54,418 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 [2021-11-25 18:51:54,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:51:54,419 INFO L225 Difference]: With dead ends: 39 [2021-11-25 18:51:54,420 INFO L226 Difference]: Without dead ends: 38 [2021-11-25 18:51:54,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:51:54,423 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:51:54,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 11 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:51:54,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-25 18:51:54,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-25 18:51:54,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 37 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:54,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-11-25 18:51:54,452 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 8 [2021-11-25 18:51:54,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:51:54,453 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-11-25 18:51:54,453 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) [2021-11-25 18:51:54,453 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-11-25 18:51:54,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:51:54,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:51:54,454 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:51:54,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:51:54,455 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:51:54,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:51:54,457 INFO L85 PathProgramCache]: Analyzing trace with hash 2026065806, now seen corresponding path program 1 times [2021-11-25 18:51:54,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:51:54,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578448235] [2021-11-25 18:51:54,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:54,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:51:54,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:54,522 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:51:54,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578448235] [2021-11-25 18:51:54,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578448235] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:51:54,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123104928] [2021-11-25 18:51:54,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:54,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:51:54,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:51:54,526 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:51:54,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:51:54,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:54,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:51:54,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:51:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:54,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:51:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:54,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123104928] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:51:54,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1039961511] [2021-11-25 18:51:54,754 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:51:54,754 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:51:54,759 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:51:54,766 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:51:54,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:51:55,165 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:51:55,506 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '418#(and (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (< 2147483646 |ULTIMATE.start_main_~a~0#1|) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~max~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~max~0#1|))' at error location [2021-11-25 18:51:55,506 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:51:55,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:51:55,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-25 18:51:55,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802651271] [2021-11-25 18:51:55,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:51:55,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:51:55,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:51:55,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:51:55,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-25 18:51:55,509 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:55,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:51:55,624 INFO L93 Difference]: Finished difference Result 97 states and 134 transitions. [2021-11-25 18:51:55,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:51:55,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 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 11 [2021-11-25 18:51:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:51:55,634 INFO L225 Difference]: With dead ends: 97 [2021-11-25 18:51:55,636 INFO L226 Difference]: Without dead ends: 95 [2021-11-25 18:51:55,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-25 18:51:55,640 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:51:55,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 37 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:51:55,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-25 18:51:55,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2021-11-25 18:51:55,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.3972602739726028) internal successors, (102), 77 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:55,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2021-11-25 18:51:55,666 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 11 [2021-11-25 18:51:55,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:51:55,666 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2021-11-25 18:51:55,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:55,667 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2021-11-25 18:51:55,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 18:51:55,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:51:55,668 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:51:55,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 18:51:55,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:51:55,884 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:51:55,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:51:55,885 INFO L85 PathProgramCache]: Analyzing trace with hash -974279381, now seen corresponding path program 1 times [2021-11-25 18:51:55,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:51:55,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590924194] [2021-11-25 18:51:55,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:55,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:51:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:55,956 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:51:55,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590924194] [2021-11-25 18:51:55,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590924194] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:51:55,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480946423] [2021-11-25 18:51:55,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:55,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:51:55,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:51:55,958 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:51:55,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:51:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:56,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:51:56,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:51:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:56,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:51:56,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:56,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480946423] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:51:56,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [367634681] [2021-11-25 18:51:56,104 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:51:56,104 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:51:56,105 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:51:56,105 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:51:56,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:51:56,302 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:51:56,478 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '694#(and (< (+ 2147483649 |ULTIMATE.start_main_~a~0#1|) 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~max~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~max~0#1|))' at error location [2021-11-25 18:51:56,478 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:51:56,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:51:56,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-25 18:51:56,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85177038] [2021-11-25 18:51:56,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:51:56,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:51:56,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:51:56,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:51:56,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:51:56,481 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:56,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:51:56,545 INFO L93 Difference]: Finished difference Result 134 states and 185 transitions. [2021-11-25 18:51:56,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:51:56,548 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2021-11-25 18:51:56,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:51:56,555 INFO L225 Difference]: With dead ends: 134 [2021-11-25 18:51:56,556 INFO L226 Difference]: Without dead ends: 132 [2021-11-25 18:51:56,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:51:56,561 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 45 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:51:56,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 19 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:51:56,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-25 18:51:56,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 98. [2021-11-25 18:51:56,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.351063829787234) internal successors, (127), 97 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:56,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 127 transitions. [2021-11-25 18:51:56,592 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 127 transitions. Word has length 12 [2021-11-25 18:51:56,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:51:56,592 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 127 transitions. [2021-11-25 18:51:56,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:56,593 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 127 transitions. [2021-11-25 18:51:56,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 18:51:56,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:51:56,593 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 18:51:56,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 18:51:56,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:51:56,794 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:51:56,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:51:56,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1429056119, now seen corresponding path program 1 times [2021-11-25 18:51:56,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:51:56,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304799345] [2021-11-25 18:51:56,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:56,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:51:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:56,839 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:51:56,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304799345] [2021-11-25 18:51:56,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304799345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:51:56,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264549040] [2021-11-25 18:51:56,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:56,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:51:56,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:51:56,856 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:51:56,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:51:56,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:56,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:51:56,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:51:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:56,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:51:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:56,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264549040] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:51:56,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1754981019] [2021-11-25 18:51:56,998 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:51:56,999 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:51:56,999 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:51:56,999 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:51:57,000 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:51:57,239 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:51:57,522 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1041#(and (<= 1 |ULTIMATE.start_main_~a~0#1|) (< 2147483646 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~max~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~max~0#1|))' at error location [2021-11-25 18:51:57,522 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:51:57,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:51:57,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-25 18:51:57,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686125476] [2021-11-25 18:51:57,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:51:57,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:51:57,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:51:57,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:51:57,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-25 18:51:57,525 INFO L87 Difference]: Start difference. First operand 98 states and 127 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:57,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:51:57,569 INFO L93 Difference]: Finished difference Result 206 states and 267 transitions. [2021-11-25 18:51:57,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:51:57,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 18:51:57,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:51:57,572 INFO L225 Difference]: With dead ends: 206 [2021-11-25 18:51:57,572 INFO L226 Difference]: Without dead ends: 205 [2021-11-25 18:51:57,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-25 18:51:57,574 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:51:57,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 42 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:51:57,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-25 18:51:57,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 203. [2021-11-25 18:51:57,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 199 states have (on average 1.2412060301507537) internal successors, (247), 202 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 247 transitions. [2021-11-25 18:51:57,616 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 247 transitions. Word has length 13 [2021-11-25 18:51:57,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:51:57,617 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 247 transitions. [2021-11-25 18:51:57,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:57,617 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 247 transitions. [2021-11-25 18:51:57,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 18:51:57,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:51:57,619 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1] [2021-11-25 18:51:57,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:51:57,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:51:57,835 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)] === [2021-11-25 18:51:57,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:51:57,836 INFO L85 PathProgramCache]: Analyzing trace with hash -385077154, now seen corresponding path program 1 times [2021-11-25 18:51:57,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:51:57,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164487798] [2021-11-25 18:51:57,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:57,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:51:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:57,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:51:57,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164487798] [2021-11-25 18:51:57,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164487798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:51:57,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202864758] [2021-11-25 18:51:57,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:57,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:51:57,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:51:57,893 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:51:57,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:51:57,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:57,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:51:57,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:51:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:57,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:51:58,072 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:58,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202864758] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:51:58,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [820655296] [2021-11-25 18:51:58,076 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:51:58,076 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:51:58,077 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:51:58,077 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:51:58,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:51:58,182 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:51:58,337 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1620#(and (< (+ 2147483647 |ULTIMATE.start_main_~a~0#1|) 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~max~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~max~0#1|))' at error location [2021-11-25 18:51:58,337 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:51:58,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:51:58,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-25 18:51:58,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601827963] [2021-11-25 18:51:58,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:51:58,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:51:58,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:51:58,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:51:58,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-25 18:51:58,339 INFO L87 Difference]: Start difference. First operand 203 states and 247 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 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) [2021-11-25 18:51:58,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:51:58,420 INFO L93 Difference]: Finished difference Result 398 states and 514 transitions. [2021-11-25 18:51:58,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:51:58,421 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-25 18:51:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:51:58,424 INFO L225 Difference]: With dead ends: 398 [2021-11-25 18:51:58,425 INFO L226 Difference]: Without dead ends: 397 [2021-11-25 18:51:58,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-25 18:51:58,426 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 42 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:51:58,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 44 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:51:58,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-11-25 18:51:58,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 329. [2021-11-25 18:51:58,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 325 states have (on average 1.2769230769230768) internal successors, (415), 328 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:58,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 415 transitions. [2021-11-25 18:51:58,449 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 415 transitions. Word has length 18 [2021-11-25 18:51:58,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:51:58,450 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 415 transitions. [2021-11-25 18:51:58,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 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) [2021-11-25 18:51:58,450 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 415 transitions. [2021-11-25 18:51:58,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 18:51:58,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:51:58,453 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1] [2021-11-25 18:51:58,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:51:58,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 18:51:58,672 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)] === [2021-11-25 18:51:58,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:51:58,672 INFO L85 PathProgramCache]: Analyzing trace with hash 2043316153, now seen corresponding path program 2 times [2021-11-25 18:51:58,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:51:58,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427631553] [2021-11-25 18:51:58,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:58,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:51:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:58,774 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:51:58,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427631553] [2021-11-25 18:51:58,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427631553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:51:58,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152714868] [2021-11-25 18:51:58,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:51:58,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:51:58,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:51:58,776 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:51:58,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:51:58,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 18:51:58,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:51:58,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:51:58,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:51:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:58,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:51:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:59,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152714868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:51:59,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1120869546] [2021-11-25 18:51:59,033 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:51:59,034 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:51:59,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:51:59,034 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:51:59,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:51:59,215 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:51:59,493 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2629#(and (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (< 2147483646 |ULTIMATE.start_main_~a~0#1|) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~max~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~max~0#1|))' at error location [2021-11-25 18:51:59,494 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:51:59,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:51:59,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-25 18:51:59,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631354722] [2021-11-25 18:51:59,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:51:59,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:51:59,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:51:59,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:51:59,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:51:59,496 INFO L87 Difference]: Start difference. First operand 329 states and 415 transitions. Second operand has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:59,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:51:59,637 INFO L93 Difference]: Finished difference Result 870 states and 1194 transitions. [2021-11-25 18:51:59,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:51:59,638 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 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 29 [2021-11-25 18:51:59,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:51:59,644 INFO L225 Difference]: With dead ends: 870 [2021-11-25 18:51:59,644 INFO L226 Difference]: Without dead ends: 868 [2021-11-25 18:51:59,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:51:59,646 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 83 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:51:59,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 76 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:51:59,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-11-25 18:51:59,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 572. [2021-11-25 18:51:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 568 states have (on average 1.2869718309859155) internal successors, (731), 571 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:59,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 731 transitions. [2021-11-25 18:51:59,676 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 731 transitions. Word has length 29 [2021-11-25 18:51:59,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:51:59,676 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 731 transitions. [2021-11-25 18:51:59,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:59,677 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 731 transitions. [2021-11-25 18:51:59,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-25 18:51:59,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:51:59,680 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1] [2021-11-25 18:51:59,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:51:59,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-25 18:51:59,900 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:51:59,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:51:59,900 INFO L85 PathProgramCache]: Analyzing trace with hash 826770402, now seen corresponding path program 2 times [2021-11-25 18:51:59,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:51:59,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089222455] [2021-11-25 18:51:59,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:59,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:51:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 18:51:59,947 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:51:59,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089222455] [2021-11-25 18:51:59,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089222455] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:51:59,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090306952] [2021-11-25 18:51:59,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:51:59,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:51:59,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:51:59,949 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:51:59,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:51:59,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-25 18:51:59,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:51:59,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:51:59,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:52:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 18:52:00,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:52:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 18:52:00,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090306952] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:52:00,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1327619867] [2021-11-25 18:52:00,154 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:52:00,154 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:52:00,155 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:52:00,155 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:52:00,155 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:52:00,322 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:52:00,610 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4456#(and (<= 1 |ULTIMATE.start_main_~a~0#1|) (< 2147483646 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~max~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~max~0#1|))' at error location [2021-11-25 18:52:00,610 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:52:00,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:52:00,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2021-11-25 18:52:00,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754482905] [2021-11-25 18:52:00,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:52:00,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:52:00,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:52:00,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:52:00,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:52:00,612 INFO L87 Difference]: Start difference. First operand 572 states and 731 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:52:00,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:52:00,656 INFO L93 Difference]: Finished difference Result 572 states and 731 transitions. [2021-11-25 18:52:00,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:52:00,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-25 18:52:00,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:52:00,670 INFO L225 Difference]: With dead ends: 572 [2021-11-25 18:52:00,670 INFO L226 Difference]: Without dead ends: 571 [2021-11-25 18:52:00,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:52:00,672 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:52:00,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 9 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:52:00,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-25 18:52:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 456. [2021-11-25 18:52:00,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 453 states have (on average 1.1898454746136866) internal successors, (539), 455 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:52:00,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 539 transitions. [2021-11-25 18:52:00,717 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 539 transitions. Word has length 31 [2021-11-25 18:52:00,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:52:00,732 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 539 transitions. [2021-11-25 18:52:00,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:52:00,732 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 539 transitions. [2021-11-25 18:52:00,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-25 18:52:00,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:52:00,734 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1] [2021-11-25 18:52:00,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:52:00,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:52:00,959 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:52:00,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:52:00,960 INFO L85 PathProgramCache]: Analyzing trace with hash 435226258, now seen corresponding path program 2 times [2021-11-25 18:52:00,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:52:00,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683345552] [2021-11-25 18:52:00,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:52:00,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:52:00,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:52:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:52:01,060 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:52:01,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683345552] [2021-11-25 18:52:01,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683345552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:52:01,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5164351] [2021-11-25 18:52:01,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:52:01,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:52:01,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:52:01,072 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:52:01,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:52:01,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-25 18:52:01,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:52:01,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:52:01,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:52:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:52:01,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:52:01,413 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:52:01,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5164351] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:52:01,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1323979927] [2021-11-25 18:52:01,421 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:52:01,422 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:52:01,422 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:52:01,422 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:52:01,422 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:52:01,507 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:52:01,672 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5899#(and (< (+ 2147483647 |ULTIMATE.start_main_~a~0#1|) 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~max~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~max~0#1|))' at error location [2021-11-25 18:52:01,672 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:52:01,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:52:01,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-11-25 18:52:01,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442316922] [2021-11-25 18:52:01,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:52:01,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-25 18:52:01,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:52:01,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-25 18:52:01,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2021-11-25 18:52:01,674 INFO L87 Difference]: Start difference. First operand 456 states and 539 transitions. Second operand has 16 states, 15 states have (on average 5.533333333333333) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:52:01,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:52:01,914 INFO L93 Difference]: Finished difference Result 1648 states and 2019 transitions. [2021-11-25 18:52:01,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 18:52:01,915 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 5.533333333333333) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 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 42 [2021-11-25 18:52:01,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:52:01,926 INFO L225 Difference]: With dead ends: 1648 [2021-11-25 18:52:01,926 INFO L226 Difference]: Without dead ends: 1647 [2021-11-25 18:52:01,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2021-11-25 18:52:01,929 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 100 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:52:01,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 77 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:52:01,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-11-25 18:52:01,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 902. [2021-11-25 18:52:01,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 899 states have (on average 1.1802002224694104) internal successors, (1061), 901 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:52:01,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1061 transitions. [2021-11-25 18:52:01,987 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1061 transitions. Word has length 42 [2021-11-25 18:52:01,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:52:01,987 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 1061 transitions. [2021-11-25 18:52:01,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 5.533333333333333) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:52:01,988 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1061 transitions. [2021-11-25 18:52:01,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 18:52:01,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:52:01,991 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1] [2021-11-25 18:52:02,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:52:02,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:52:02,208 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:52:02,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:52:02,208 INFO L85 PathProgramCache]: Analyzing trace with hash 84797903, now seen corresponding path program 3 times [2021-11-25 18:52:02,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:52:02,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955288944] [2021-11-25 18:52:02,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:52:02,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:52:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:52:02,366 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:52:02,367 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:52:02,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955288944] [2021-11-25 18:52:02,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955288944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:52:02,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904610390] [2021-11-25 18:52:02,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:52:02,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:52:02,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:52:02,372 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:52:02,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:52:02,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:52:02,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:52:02,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:52:02,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:52:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:52:02,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:52:02,898 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:52:02,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904610390] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:52:02,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1796498173] [2021-11-25 18:52:02,901 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:52:02,901 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:52:02,901 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:52:02,902 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:52:02,902 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:52:03,044 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:52:03,367 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9211#(and (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (< 2147483646 |ULTIMATE.start_main_~a~0#1|) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~max~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~max~0#1|))' at error location [2021-11-25 18:52:03,367 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:52:03,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:52:03,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-11-25 18:52:03,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402118364] [2021-11-25 18:52:03,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:52:03,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 18:52:03,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:52:03,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 18:52:03,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=682, Unknown=0, NotChecked=0, Total=992 [2021-11-25 18:52:03,370 INFO L87 Difference]: Start difference. First operand 902 states and 1061 transitions. Second operand has 24 states, 23 states have (on average 5.608695652173913) internal successors, (129), 24 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:52:03,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:52:03,706 INFO L93 Difference]: Finished difference Result 4198 states and 5263 transitions. [2021-11-25 18:52:03,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 18:52:03,707 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.608695652173913) internal successors, (129), 24 states have internal predecessors, (129), 0 states have call successors, (0), 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 65 [2021-11-25 18:52:03,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:52:03,732 INFO L225 Difference]: With dead ends: 4198 [2021-11-25 18:52:03,733 INFO L226 Difference]: Without dead ends: 4196 [2021-11-25 18:52:03,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=310, Invalid=682, Unknown=0, NotChecked=0, Total=992 [2021-11-25 18:52:03,739 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 157 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:52:03,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 120 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:52:03,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4196 states. [2021-11-25 18:52:03,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4196 to 1944. [2021-11-25 18:52:03,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1944 states, 1941 states have (on average 1.1597114889232354) internal successors, (2251), 1943 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:52:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 2251 transitions. [2021-11-25 18:52:03,850 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 2251 transitions. Word has length 65 [2021-11-25 18:52:03,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:52:03,851 INFO L470 AbstractCegarLoop]: Abstraction has 1944 states and 2251 transitions. [2021-11-25 18:52:03,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.608695652173913) internal successors, (129), 24 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:52:03,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 2251 transitions. [2021-11-25 18:52:03,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-25 18:52:03,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:52:03,854 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1, 1] [2021-11-25 18:52:03,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:52:04,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 18:52:04,070 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:52:04,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:52:04,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1620549370, now seen corresponding path program 3 times [2021-11-25 18:52:04,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:52:04,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819027868] [2021-11-25 18:52:04,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:52:04,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:52:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:52:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:52:04,361 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:52:04,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819027868] [2021-11-25 18:52:04,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819027868] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:52:04,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056906185] [2021-11-25 18:52:04,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:52:04,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:52:04,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:52:04,363 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:52:04,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:52:04,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:52:04,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:52:04,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 18:52:04,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:52:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:52:04,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:52:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:52:05,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056906185] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:52:05,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [81776949] [2021-11-25 18:52:05,263 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:52:05,264 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:52:05,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:52:05,264 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:52:05,264 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:52:05,369 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:52:05,579 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16750#(and (< (+ 2147483647 |ULTIMATE.start_main_~a~0#1|) 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~max~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~max~0#1|))' at error location [2021-11-25 18:52:05,579 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:52:05,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:52:05,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2021-11-25 18:52:05,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554827643] [2021-11-25 18:52:05,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:52:05,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-25 18:52:05,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:52:05,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-25 18:52:05,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=522, Invalid=960, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 18:52:05,584 INFO L87 Difference]: Start difference. First operand 1944 states and 2251 transitions. Second operand has 32 states, 31 states have (on average 5.774193548387097) internal successors, (179), 32 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:52:06,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:52:06,271 INFO L93 Difference]: Finished difference Result 9842 states and 11725 transitions. [2021-11-25 18:52:06,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-25 18:52:06,272 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 5.774193548387097) internal successors, (179), 32 states have internal predecessors, (179), 0 states have call successors, (0), 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 90 [2021-11-25 18:52:06,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:52:06,327 INFO L225 Difference]: With dead ends: 9842 [2021-11-25 18:52:06,327 INFO L226 Difference]: Without dead ends: 9841 [2021-11-25 18:52:06,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=522, Invalid=960, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 18:52:06,337 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 222 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:52:06,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 157 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:52:06,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9841 states. [2021-11-25 18:52:06,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9841 to 3730. [2021-11-25 18:52:06,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3730 states, 3727 states have (on average 1.1540112691172524) internal successors, (4301), 3729 states have internal predecessors, (4301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:52:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3730 states to 3730 states and 4301 transitions. [2021-11-25 18:52:06,609 INFO L78 Accepts]: Start accepts. Automaton has 3730 states and 4301 transitions. Word has length 90 [2021-11-25 18:52:06,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:52:06,609 INFO L470 AbstractCegarLoop]: Abstraction has 3730 states and 4301 transitions. [2021-11-25 18:52:06,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 5.774193548387097) internal successors, (179), 32 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:52:06,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states and 4301 transitions. [2021-11-25 18:52:06,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-25 18:52:06,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:52:06,614 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1] [2021-11-25 18:52:06,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:52:06,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 18:52:06,828 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:52:06,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:52:06,828 INFO L85 PathProgramCache]: Analyzing trace with hash 65778939, now seen corresponding path program 4 times [2021-11-25 18:52:06,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:52:06,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876506438] [2021-11-25 18:52:06,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:52:06,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:52:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:52:07,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 1452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:52:07,271 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:52:07,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876506438] [2021-11-25 18:52:07,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876506438] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:52:07,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878497088] [2021-11-25 18:52:07,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:52:07,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:52:07,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:52:07,287 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:52:07,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:52:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:52:07,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 18:52:07,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:52:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 1452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:52:07,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:52:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 1452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:52:08,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878497088] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:52:08,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1872194466] [2021-11-25 18:52:08,795 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:52:08,795 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:52:08,795 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:52:08,796 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:52:08,796 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:52:09,013 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:52:09,347 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32978#(and (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (< 2147483646 |ULTIMATE.start_main_~a~0#1|) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~max~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~max~0#1|))' at error location [2021-11-25 18:52:09,347 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:52:09,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:52:09,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-11-25 18:52:09,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748181098] [2021-11-25 18:52:09,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:52:09,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 18:52:09,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:52:09,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 18:52:09,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1162, Invalid=1918, Unknown=0, NotChecked=0, Total=3080 [2021-11-25 18:52:09,350 INFO L87 Difference]: Start difference. First operand 3730 states and 4301 transitions. Second operand has 48 states, 47 states have (on average 5.808510638297872) internal successors, (273), 48 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:52:10,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:52:10,552 INFO L93 Difference]: Finished difference Result 26438 states and 31923 transitions. [2021-11-25 18:52:10,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-25 18:52:10,553 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 5.808510638297872) internal successors, (273), 48 states have internal predecessors, (273), 0 states have call successors, (0), 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 137 [2021-11-25 18:52:10,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:52:10,640 INFO L225 Difference]: With dead ends: 26438 [2021-11-25 18:52:10,640 INFO L226 Difference]: Without dead ends: 26436 [2021-11-25 18:52:10,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1162, Invalid=1918, Unknown=0, NotChecked=0, Total=3080 [2021-11-25 18:52:10,667 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 470 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:52:10,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 240 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:52:10,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26436 states. [2021-11-25 18:52:11,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26436 to 7992. [2021-11-25 18:52:11,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7992 states, 7989 states have (on average 1.142946551508324) internal successors, (9131), 7991 states have internal predecessors, (9131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:52:11,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7992 states to 7992 states and 9131 transitions. [2021-11-25 18:52:11,327 INFO L78 Accepts]: Start accepts. Automaton has 7992 states and 9131 transitions. Word has length 137 [2021-11-25 18:52:11,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:52:11,327 INFO L470 AbstractCegarLoop]: Abstraction has 7992 states and 9131 transitions. [2021-11-25 18:52:11,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 5.808510638297872) internal successors, (273), 48 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:52:11,328 INFO L276 IsEmpty]: Start isEmpty. Operand 7992 states and 9131 transitions. [2021-11-25 18:52:11,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-25 18:52:11,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:52:11,335 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 1, 1, 1] [2021-11-25 18:52:11,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:52:11,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:52:11,552 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:52:11,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:52:11,552 INFO L85 PathProgramCache]: Analyzing trace with hash 780697546, now seen corresponding path program 4 times [2021-11-25 18:52:11,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:52:11,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060349856] [2021-11-25 18:52:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:52:11,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:52:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:52:12,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 2730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:52:12,294 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:52:12,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060349856] [2021-11-25 18:52:12,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060349856] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:52:12,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621025273] [2021-11-25 18:52:12,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:52:12,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:52:12,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:52:12,297 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:52:12,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:52:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:52:12,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-25 18:52:12,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:52:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 2730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:52:12,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:52:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 2730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:52:14,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621025273] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:52:14,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [551213011] [2021-11-25 18:52:14,761 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:52:14,762 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:52:14,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:52:14,762 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:52:14,763 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:52:14,840 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:52:15,126 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '73075#(and (< (+ 2147483647 |ULTIMATE.start_main_~a~0#1|) 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~max~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~max~0#1|))' at error location [2021-11-25 18:52:15,126 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:52:15,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:52:15,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2021-11-25 18:52:15,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190919345] [2021-11-25 18:52:15,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:52:15,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-25 18:52:15,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:52:15,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-25 18:52:15,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2042, Invalid=2928, Unknown=0, NotChecked=0, Total=4970 [2021-11-25 18:52:15,133 INFO L87 Difference]: Start difference. First operand 7992 states and 9131 transitions. Second operand has 64 states, 63 states have (on average 5.888888888888889) internal successors, (371), 64 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:52:17,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:52:17,752 INFO L93 Difference]: Finished difference Result 65014 states and 75717 transitions. [2021-11-25 18:52:17,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-25 18:52:17,753 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 5.888888888888889) internal successors, (371), 64 states have internal predecessors, (371), 0 states have call successors, (0), 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 186 [2021-11-25 18:52:17,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:52:17,871 INFO L225 Difference]: With dead ends: 65014 [2021-11-25 18:52:17,871 INFO L226 Difference]: Without dead ends: 65013 [2021-11-25 18:52:17,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2042, Invalid=2928, Unknown=0, NotChecked=0, Total=4970 [2021-11-25 18:52:17,908 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 592 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 805 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 805 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:52:17,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 317 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [805 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:52:17,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65013 states. [2021-11-25 18:52:19,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65013 to 15146. [2021-11-25 18:52:19,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15146 states, 15143 states have (on average 1.139866605032028) internal successors, (17261), 15145 states have internal predecessors, (17261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:52:19,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15146 states to 15146 states and 17261 transitions. [2021-11-25 18:52:19,446 INFO L78 Accepts]: Start accepts. Automaton has 15146 states and 17261 transitions. Word has length 186 [2021-11-25 18:52:19,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:52:19,447 INFO L470 AbstractCegarLoop]: Abstraction has 15146 states and 17261 transitions. [2021-11-25 18:52:19,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 5.888888888888889) internal successors, (371), 64 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:52:19,448 INFO L276 IsEmpty]: Start isEmpty. Operand 15146 states and 17261 transitions. [2021-11-25 18:52:19,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-25 18:52:19,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:52:19,464 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 1, 1, 1] [2021-11-25 18:52:19,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-25 18:52:19,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 18:52:19,680 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:52:19,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:52:19,680 INFO L85 PathProgramCache]: Analyzing trace with hash 465397587, now seen corresponding path program 5 times [2021-11-25 18:52:19,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:52:19,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277142636] [2021-11-25 18:52:19,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:52:19,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:52:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:52:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6348 backedges. 0 proven. 6348 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:52:20,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:52:20,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277142636] [2021-11-25 18:52:20,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277142636] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:52:20,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024758086] [2021-11-25 18:52:20,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:52:20,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:52:20,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:52:20,827 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:52:20,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 18:52:21,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-25 18:52:21,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:52:21,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-25 18:52:21,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:52:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6348 backedges. 0 proven. 6348 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:52:21,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:52:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6348 backedges. 0 proven. 6348 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:52:24,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024758086] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:52:24,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [470859635] [2021-11-25 18:52:24,775 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:52:24,775 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:52:24,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:52:24,776 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:52:24,776 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:52:24,899 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:52:25,274 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '165331#(and (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (< 2147483646 |ULTIMATE.start_main_~a~0#1|) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~max~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~max~0#1|))' at error location [2021-11-25 18:52:25,274 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:52:25,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:52:25,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2021-11-25 18:52:25,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985871536] [2021-11-25 18:52:25,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:52:25,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-25 18:52:25,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:52:25,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-25 18:52:25,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4594, Invalid=6118, Unknown=0, NotChecked=0, Total=10712 [2021-11-25 18:52:25,284 INFO L87 Difference]: Start difference. First operand 15146 states and 17261 transitions. Second operand has 96 states, 95 states have (on average 5.905263157894737) internal successors, (561), 96 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:52:31,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:52:31,879 INFO L93 Difference]: Finished difference Result 182334 states and 213859 transitions. [2021-11-25 18:52:31,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-25 18:52:31,898 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 5.905263157894737) internal successors, (561), 96 states have internal predecessors, (561), 0 states have call successors, (0), 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 281 [2021-11-25 18:52:31,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:52:32,143 INFO L225 Difference]: With dead ends: 182334 [2021-11-25 18:52:32,144 INFO L226 Difference]: Without dead ends: 182332 [2021-11-25 18:52:32,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 889 GetRequests, 787 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4594, Invalid=6118, Unknown=0, NotChecked=0, Total=10712 [2021-11-25 18:52:32,191 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 886 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:52:32,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 480 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:52:32,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182332 states. [2021-11-25 18:52:35,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182332 to 32376. [2021-11-25 18:52:35,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32376 states, 32373 states have (on average 1.134124115775492) internal successors, (36715), 32375 states have internal predecessors, (36715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:52:35,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32376 states to 32376 states and 36715 transitions. [2021-11-25 18:52:35,676 INFO L78 Accepts]: Start accepts. Automaton has 32376 states and 36715 transitions. Word has length 281 [2021-11-25 18:52:35,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:52:35,677 INFO L470 AbstractCegarLoop]: Abstraction has 32376 states and 36715 transitions. [2021-11-25 18:52:35,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 5.905263157894737) internal successors, (561), 96 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:52:35,677 INFO L276 IsEmpty]: Start isEmpty. Operand 32376 states and 36715 transitions. [2021-11-25 18:52:35,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-11-25 18:52:35,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:52:35,708 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 62, 62, 62, 1, 1, 1] [2021-11-25 18:52:35,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:52:35,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 18:52:35,936 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:52:35,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:52:35,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1450770794, now seen corresponding path program 5 times [2021-11-25 18:52:35,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:52:35,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204337168] [2021-11-25 18:52:35,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:52:35,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:52:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:52:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 11594 backedges. 0 proven. 11594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:52:38,117 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:52:38,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204337168] [2021-11-25 18:52:38,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204337168] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:52:38,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155071] [2021-11-25 18:52:38,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:52:38,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:52:38,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:52:38,123 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:52:38,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 18:52:38,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2021-11-25 18:52:38,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:52:38,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-25 18:52:38,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:52:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11594 backedges. 0 proven. 11594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:52:39,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:52:44,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11594 backedges. 0 proven. 11594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:52:44,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155071] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:52:44,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2144924066] [2021-11-25 18:52:44,477 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:52:44,478 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:52:44,478 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:52:44,478 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:52:44,478 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:52:44,577 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:52:44,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '409912#(and (< (+ 2147483647 |ULTIMATE.start_main_~a~0#1|) 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~max~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~max~0#1|))' at error location [2021-11-25 18:52:44,900 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:52:44,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:52:44,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 127 [2021-11-25 18:52:44,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053102019] [2021-11-25 18:52:44,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:52:44,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-11-25 18:52:44,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:52:44,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-11-25 18:52:44,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8154, Invalid=9936, Unknown=0, NotChecked=0, Total=18090 [2021-11-25 18:52:44,912 INFO L87 Difference]: Start difference. First operand 32376 states and 36715 transitions. Second operand has 128 states, 127 states have (on average 5.94488188976378) internal successors, (755), 128 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:08,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:08,240 INFO L93 Difference]: Finished difference Result 464894 states and 533221 transitions. [2021-11-25 18:53:08,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-11-25 18:53:08,241 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 127 states have (on average 5.94488188976378) internal successors, (755), 128 states have internal predecessors, (755), 0 states have call successors, (0), 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 378 [2021-11-25 18:53:08,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:09,155 INFO L225 Difference]: With dead ends: 464894 [2021-11-25 18:53:09,155 INFO L226 Difference]: Without dead ends: 464893 [2021-11-25 18:53:09,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1196 GetRequests, 1063 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=8154, Invalid=9936, Unknown=0, NotChecked=0, Total=18090 [2021-11-25 18:53:09,295 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 1528 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 2814 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1528 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 3332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2814 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:09,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1528 Valid, 637 Invalid, 3332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2814 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-25 18:53:09,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464893 states. [2021-11-25 18:53:19,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464893 to 61018. [2021-11-25 18:53:19,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61018 states, 61015 states have (on average 1.1325247889863148) internal successors, (69101), 61017 states have internal predecessors, (69101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:19,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61018 states to 61018 states and 69101 transitions. [2021-11-25 18:53:19,667 INFO L78 Accepts]: Start accepts. Automaton has 61018 states and 69101 transitions. Word has length 378 [2021-11-25 18:53:19,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:19,668 INFO L470 AbstractCegarLoop]: Abstraction has 61018 states and 69101 transitions. [2021-11-25 18:53:19,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 127 states have (on average 5.94488188976378) internal successors, (755), 128 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:19,669 INFO L276 IsEmpty]: Start isEmpty. Operand 61018 states and 69101 transitions. [2021-11-25 18:53:19,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2021-11-25 18:53:19,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:19,975 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 94, 94, 94, 94, 1, 1, 1] [2021-11-25 18:53:20,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:53:20,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 18:53:20,200 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:53:20,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:20,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1014416381, now seen corresponding path program 6 times [2021-11-25 18:53:20,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:20,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628079736] [2021-11-25 18:53:20,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:20,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:20,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 26508 backedges. 0 proven. 26508 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:53:24,276 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:24,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628079736] [2021-11-25 18:53:24,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628079736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:53:24,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381084187] [2021-11-25 18:53:24,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:53:24,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:24,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:53:24,277 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:53:24,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_525f7346-adbd-4b87-801b-5541d0bb6c9a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 18:53:24,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:53:24,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:53:24,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 1142 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-25 18:53:24,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:53:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 26508 backedges. 0 proven. 26508 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:53:25,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:53:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 26508 backedges. 0 proven. 26508 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:53:36,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381084187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:53:36,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1127548235] [2021-11-25 18:53:36,007 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:53:36,008 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:53:36,008 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:53:36,008 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:53:36,008 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:53:36,184 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:53:36,785 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1006208#(and (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (< 2147483646 |ULTIMATE.start_main_~a~0#1|) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~max~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~max~0#1|))' at error location [2021-11-25 18:53:36,785 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:53:36,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:53:36,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2021-11-25 18:53:36,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225789807] [2021-11-25 18:53:36,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:53:36,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-11-25 18:53:36,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:36,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-11-25 18:53:36,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18370, Invalid=21430, Unknown=0, NotChecked=0, Total=39800 [2021-11-25 18:53:36,801 INFO L87 Difference]: Start difference. First operand 61018 states and 69101 transitions. Second operand has 192 states, 191 states have (on average 5.952879581151833) internal successors, (1137), 192 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)