/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/list-properties/alternating_list-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 03:54:47,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 03:54:47,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 03:54:47,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 03:54:47,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 03:54:47,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 03:54:47,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 03:54:47,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 03:54:47,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 03:54:47,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 03:54:47,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 03:54:47,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 03:54:47,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 03:54:47,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 03:54:47,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 03:54:47,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 03:54:47,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 03:54:47,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 03:54:47,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 03:54:47,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 03:54:47,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 03:54:47,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 03:54:47,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 03:54:47,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 03:54:47,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 03:54:47,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 03:54:47,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 03:54:47,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 03:54:47,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 03:54:47,447 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 03:54:47,447 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 03:54:47,448 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 03:54:47,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 03:54:47,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 03:54:47,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 03:54:47,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 03:54:47,451 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 03:54:47,451 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 03:54:47,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 03:54:47,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 03:54:47,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 03:54:47,454 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 03:54:47,489 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 03:54:47,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 03:54:47,491 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 03:54:47,491 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 03:54:47,491 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 03:54:47,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 03:54:47,492 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 03:54:47,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 03:54:47,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 03:54:47,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 03:54:47,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 03:54:47,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 03:54:47,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 03:54:47,493 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 03:54:47,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 03:54:47,493 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 03:54:47,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 03:54:47,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 03:54:47,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 03:54:47,496 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 03:54:47,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 03:54:47,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 03:54:47,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 03:54:47,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 03:54:47,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 03:54:47,498 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 03:54:47,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 03:54:47,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 03:54:47,498 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 03:54:47,792 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 03:54:47,805 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 03:54:47,809 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 03:54:47,810 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 03:54:47,811 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 03:54:47,811 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/alternating_list-1.i [2019-11-07 03:54:47,874 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9879f0fb8/6aac7a9a6b744c6484f2737fbbb009d7/FLAG785f493c3 [2019-11-07 03:54:48,402 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 03:54:48,403 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/alternating_list-1.i [2019-11-07 03:54:48,423 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9879f0fb8/6aac7a9a6b744c6484f2737fbbb009d7/FLAG785f493c3 [2019-11-07 03:54:48,730 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9879f0fb8/6aac7a9a6b744c6484f2737fbbb009d7 [2019-11-07 03:54:48,740 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 03:54:48,742 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 03:54:48,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 03:54:48,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 03:54:48,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 03:54:48,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:54:48" (1/1) ... [2019-11-07 03:54:48,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1888b39b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:48, skipping insertion in model container [2019-11-07 03:54:48,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:54:48" (1/1) ... [2019-11-07 03:54:48,763 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 03:54:48,820 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 03:54:49,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:54:49,295 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 03:54:49,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:54:49,430 INFO L192 MainTranslator]: Completed translation [2019-11-07 03:54:49,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:49 WrapperNode [2019-11-07 03:54:49,431 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 03:54:49,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 03:54:49,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 03:54:49,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 03:54:49,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:49" (1/1) ... [2019-11-07 03:54:49,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:49" (1/1) ... [2019-11-07 03:54:49,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:49" (1/1) ... [2019-11-07 03:54:49,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:49" (1/1) ... [2019-11-07 03:54:49,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:49" (1/1) ... [2019-11-07 03:54:49,482 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:49" (1/1) ... [2019-11-07 03:54:49,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:49" (1/1) ... [2019-11-07 03:54:49,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 03:54:49,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 03:54:49,492 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 03:54:49,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 03:54:49,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 03:54:49,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 03:54:49,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 03:54:49,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-07 03:54:49,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-07 03:54:49,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-07 03:54:49,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-07 03:54:49,559 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-07 03:54:49,559 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-07 03:54:49,560 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 03:54:49,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 03:54:49,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 03:54:49,561 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-07 03:54:49,561 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-07 03:54:49,561 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-07 03:54:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-07 03:54:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-07 03:54:49,564 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-07 03:54:49,564 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-07 03:54:49,565 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-07 03:54:49,565 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-07 03:54:49,565 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-07 03:54:49,566 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-07 03:54:49,566 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-07 03:54:49,567 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-07 03:54:49,567 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-07 03:54:49,568 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-07 03:54:49,568 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-07 03:54:49,569 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-07 03:54:49,569 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-07 03:54:49,569 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-07 03:54:49,569 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-07 03:54:49,569 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-07 03:54:49,569 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-07 03:54:49,569 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-07 03:54:49,570 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-07 03:54:49,570 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-07 03:54:49,570 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-07 03:54:49,570 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-07 03:54:49,570 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-07 03:54:49,570 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-07 03:54:49,571 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-07 03:54:49,571 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-07 03:54:49,571 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-07 03:54:49,571 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-07 03:54:49,571 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-07 03:54:49,571 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-07 03:54:49,571 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-07 03:54:49,572 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-07 03:54:49,572 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-07 03:54:49,572 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-07 03:54:49,572 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-07 03:54:49,572 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-07 03:54:49,572 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-07 03:54:49,572 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-07 03:54:49,573 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-07 03:54:49,573 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-07 03:54:49,573 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-07 03:54:49,573 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-07 03:54:49,573 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-07 03:54:49,574 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-07 03:54:49,574 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-07 03:54:49,575 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-07 03:54:49,575 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-07 03:54:49,575 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-07 03:54:49,576 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-07 03:54:49,576 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-07 03:54:49,576 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 03:54:49,576 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-07 03:54:49,577 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-07 03:54:49,577 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 03:54:49,577 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-07 03:54:49,577 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-07 03:54:49,578 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-07 03:54:49,578 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-07 03:54:49,579 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-07 03:54:49,579 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-07 03:54:49,579 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-07 03:54:49,580 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-07 03:54:49,580 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 03:54:49,580 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-07 03:54:49,581 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-07 03:54:49,581 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-07 03:54:49,581 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-07 03:54:49,581 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-07 03:54:49,581 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-07 03:54:49,582 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-07 03:54:49,582 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-07 03:54:49,583 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-07 03:54:49,583 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-07 03:54:49,583 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-07 03:54:49,583 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-07 03:54:49,583 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-07 03:54:49,583 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-07 03:54:49,584 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-07 03:54:49,584 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-07 03:54:49,584 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-07 03:54:49,584 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-07 03:54:49,584 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-07 03:54:49,584 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-07 03:54:49,584 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-07 03:54:49,584 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-07 03:54:49,584 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-07 03:54:49,584 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-07 03:54:49,584 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-07 03:54:49,585 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-07 03:54:49,585 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-07 03:54:49,585 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-07 03:54:49,585 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-07 03:54:49,585 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-07 03:54:49,585 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-07 03:54:49,585 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-07 03:54:49,585 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-07 03:54:49,585 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-07 03:54:49,585 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-07 03:54:49,585 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-07 03:54:49,586 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-07 03:54:49,586 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-07 03:54:49,586 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-07 03:54:49,586 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-07 03:54:49,586 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 03:54:49,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 03:54:49,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 03:54:49,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 03:54:49,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 03:54:49,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 03:54:49,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 03:54:49,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 03:54:49,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 03:54:49,917 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-07 03:54:50,133 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 03:54:50,134 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 03:54:50,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:54:50 BoogieIcfgContainer [2019-11-07 03:54:50,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 03:54:50,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 03:54:50,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 03:54:50,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 03:54:50,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:54:48" (1/3) ... [2019-11-07 03:54:50,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@855c01f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:54:50, skipping insertion in model container [2019-11-07 03:54:50,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:49" (2/3) ... [2019-11-07 03:54:50,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@855c01f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:54:50, skipping insertion in model container [2019-11-07 03:54:50,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:54:50" (3/3) ... [2019-11-07 03:54:50,147 INFO L109 eAbstractionObserver]: Analyzing ICFG alternating_list-1.i [2019-11-07 03:54:50,158 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 03:54:50,167 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 03:54:50,189 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 03:54:50,222 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 03:54:50,222 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 03:54:50,222 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 03:54:50,223 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 03:54:50,223 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 03:54:50,223 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 03:54:50,223 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 03:54:50,223 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 03:54:50,244 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-07 03:54:50,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 03:54:50,252 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:50,253 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:54:50,256 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:50,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:50,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1233015501, now seen corresponding path program 1 times [2019-11-07 03:54:50,273 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:50,273 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426417157] [2019-11-07 03:54:50,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:54:50,444 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426417157] [2019-11-07 03:54:50,445 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:54:50,446 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-07 03:54:50,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534110029] [2019-11-07 03:54:50,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 03:54:50,452 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:54:50,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 03:54:50,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 03:54:50,465 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-11-07 03:54:50,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:54:50,489 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2019-11-07 03:54:50,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 03:54:50,491 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2019-11-07 03:54:50,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:54:50,501 INFO L225 Difference]: With dead ends: 49 [2019-11-07 03:54:50,502 INFO L226 Difference]: Without dead ends: 20 [2019-11-07 03:54:50,507 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 03:54:50,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-07 03:54:50,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-07 03:54:50,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 03:54:50,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-07 03:54:50,556 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2019-11-07 03:54:50,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:54:50,557 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-07 03:54:50,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 03:54:50,557 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-07 03:54:50,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-07 03:54:50,559 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:50,559 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:54:50,560 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:50,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:50,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1724119726, now seen corresponding path program 1 times [2019-11-07 03:54:50,561 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:50,561 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839294699] [2019-11-07 03:54:50,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:54:50,727 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839294699] [2019-11-07 03:54:50,727 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:54:50,728 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 03:54:50,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972062353] [2019-11-07 03:54:50,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 03:54:50,730 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:54:50,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 03:54:50,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 03:54:50,731 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2019-11-07 03:54:50,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:54:50,753 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2019-11-07 03:54:50,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 03:54:50,754 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-07 03:54:50,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:54:50,755 INFO L225 Difference]: With dead ends: 37 [2019-11-07 03:54:50,755 INFO L226 Difference]: Without dead ends: 29 [2019-11-07 03:54:50,756 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 03:54:50,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-07 03:54:50,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2019-11-07 03:54:50,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-07 03:54:50,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-11-07 03:54:50,762 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2019-11-07 03:54:50,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:54:50,763 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-11-07 03:54:50,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 03:54:50,763 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-11-07 03:54:50,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-07 03:54:50,764 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:50,764 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:54:50,764 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:50,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:50,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1724126670, now seen corresponding path program 1 times [2019-11-07 03:54:50,765 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:50,765 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20319810] [2019-11-07 03:54:50,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:50,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:54:50,851 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20319810] [2019-11-07 03:54:50,851 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:54:50,852 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 03:54:50,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440837589] [2019-11-07 03:54:50,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 03:54:50,852 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:54:50,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 03:54:50,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 03:54:50,853 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 5 states. [2019-11-07 03:54:50,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:54:50,967 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2019-11-07 03:54:50,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 03:54:50,970 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-07 03:54:50,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:54:50,971 INFO L225 Difference]: With dead ends: 50 [2019-11-07 03:54:50,971 INFO L226 Difference]: Without dead ends: 35 [2019-11-07 03:54:50,973 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-07 03:54:50,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-07 03:54:50,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2019-11-07 03:54:50,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-07 03:54:50,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-11-07 03:54:50,980 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 15 [2019-11-07 03:54:50,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:54:50,983 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-11-07 03:54:50,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 03:54:50,983 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-11-07 03:54:50,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-07 03:54:50,986 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:50,986 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:54:50,987 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:50,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:50,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1627587372, now seen corresponding path program 1 times [2019-11-07 03:54:50,987 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:50,987 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715249796] [2019-11-07 03:54:50,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:51,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:54:51,210 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715249796] [2019-11-07 03:54:51,211 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228755197] [2019-11-07 03:54:51,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:54:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:51,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-07 03:54:51,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:54:51,400 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-07 03:54:51,401 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:51,409 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:54:51,410 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-07 03:54:51,410 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-07 03:54:51,456 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:54:51,483 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:54:51,483 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2019-11-07 03:54:51,484 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:51,504 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:54:51,511 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:51,525 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:54:51,525 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_$Pointer$.offset_21| vanished before elimination [2019-11-07 03:54:51,530 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-07 03:54:51,531 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:51,543 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:54:51,548 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2019-11-07 03:54:51,549 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:51,558 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:54:51,558 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 4 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-07 03:54:51,559 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:58, output treesize:18 [2019-11-07 03:54:51,586 INFO L341 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2019-11-07 03:54:51,586 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2019-11-07 03:54:51,587 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:51,592 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:54:51,593 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-07 03:54:51,593 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:12 [2019-11-07 03:54:51,616 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2019-11-07 03:54:51,617 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:51,630 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:54:51,631 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-07 03:54:51,632 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:19 [2019-11-07 03:54:51,670 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2019-11-07 03:54:51,671 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:51,677 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:54:51,678 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-07 03:54:51,678 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:26, output treesize:3 [2019-11-07 03:54:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:54:51,682 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:54:51,747 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:54:51,761 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-07 03:54:51,768 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:51,776 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:54:51,777 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-07 03:54:51,778 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:54, output treesize:22 [2019-11-07 03:54:51,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:54:51,817 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:54:51,822 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:54:51,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:54:51,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:54:51,859 INFO L392 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.base_25|, |#memory_$Pointer$.base|, |#memory_$Pointer$.offset|, v_prenex_1, |v_#memory_$Pointer$.offset_24|, v_prenex_4, v_prenex_6, v_prenex_7], 2=[v_prenex_3, |#memory_int|]} [2019-11-07 03:54:51,864 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:51,870 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:51,965 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:54:51,966 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.base| vanished before elimination [2019-11-07 03:54:51,975 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 31 [2019-11-07 03:54:51,975 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:51,984 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2019-11-07 03:54:51,984 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:52,105 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2019-11-07 03:54:52,106 INFO L567 ElimStorePlain]: treesize reduction 3, result has 98.0 percent of original size [2019-11-07 03:54:52,111 INFO L496 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:52,120 INFO L496 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:52,163 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:54:52,164 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_$Pointer$.offset_24| vanished before elimination [2019-11-07 03:54:52,164 INFO L464 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2019-11-07 03:54:52,170 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2019-11-07 03:54:52,170 INFO L496 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:52,184 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2019-11-07 03:54:52,185 INFO L496 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:52,235 INFO L567 ElimStorePlain]: treesize reduction 11, result has 86.1 percent of original size [2019-11-07 03:54:52,235 INFO L464 ElimStorePlain]: Eliminatee v_prenex_7 vanished before elimination [2019-11-07 03:54:52,254 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 165 [2019-11-07 03:54:52,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:54:52,255 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-07 03:54:52,256 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:54:52,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:54:52,258 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:54:52,258 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:54:52,265 INFO L496 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:52,469 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2019-11-07 03:54:52,470 INFO L567 ElimStorePlain]: treesize reduction 252, result has 23.2 percent of original size [2019-11-07 03:54:52,484 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 148 [2019-11-07 03:54:52,486 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-07 03:54:52,486 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:54:52,487 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-07 03:54:52,488 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:54:52,488 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:54:52,493 INFO L496 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:52,604 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2019-11-07 03:54:52,605 INFO L567 ElimStorePlain]: treesize reduction 234, result has 22.8 percent of original size [2019-11-07 03:54:52,606 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 10 dim-2 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2019-11-07 03:54:52,609 INFO L221 ElimStorePlain]: Needed 11 recursive calls to eliminate 14 variables, input treesize:211, output treesize:48 [2019-11-07 03:54:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:54:52,740 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [178889281] [2019-11-07 03:54:52,765 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-07 03:54:52,766 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:54:52,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:54:52,779 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:54:52,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:54:52,882 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-11-07 03:54:53,776 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 03:54:53,778 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:54:54,398 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:54:54,398 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 13] total 28 [2019-11-07 03:54:54,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344412899] [2019-11-07 03:54:54,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-07 03:54:54,405 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:54:54,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-07 03:54:54,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2019-11-07 03:54:54,406 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 28 states. [2019-11-07 03:54:55,302 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2019-11-07 03:54:55,776 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2019-11-07 03:54:56,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:54:56,262 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2019-11-07 03:54:56,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-07 03:54:56,263 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 19 [2019-11-07 03:54:56,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:54:56,265 INFO L225 Difference]: With dead ends: 49 [2019-11-07 03:54:56,265 INFO L226 Difference]: Without dead ends: 47 [2019-11-07 03:54:56,266 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=252, Invalid=2004, Unknown=0, NotChecked=0, Total=2256 [2019-11-07 03:54:56,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-07 03:54:56,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2019-11-07 03:54:56,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-07 03:54:56,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-11-07 03:54:56,275 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 19 [2019-11-07 03:54:56,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:54:56,275 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-11-07 03:54:56,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-07 03:54:56,275 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-11-07 03:54:56,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-07 03:54:56,276 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:56,276 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:54:56,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:54:56,480 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:56,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:56,480 INFO L82 PathProgramCache]: Analyzing trace with hash -489689482, now seen corresponding path program 2 times [2019-11-07 03:54:56,480 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:56,481 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162116862] [2019-11-07 03:54:56,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:54:56,763 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162116862] [2019-11-07 03:54:56,763 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650330957] [2019-11-07 03:54:56,763 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:54:56,912 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 03:54:56,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 03:54:56,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-07 03:54:56,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:54:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:54:57,548 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:55:16,234 WARN L191 SmtUtils]: Spent 16.16 s on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2019-11-07 03:55:25,020 WARN L191 SmtUtils]: Spent 8.07 s on a formula simplification that was a NOOP. DAG size: 58 [2019-11-07 03:55:25,827 WARN L191 SmtUtils]: Spent 760.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2019-11-07 03:55:26,035 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2019-11-07 03:55:26,267 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2019-11-07 03:55:26,406 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 86