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/list-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 02:58:46,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 02:58:46,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 02:58:46,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 02:58:46,596 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 02:58:46,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 02:58:46,598 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 02:58:46,600 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 02:58:46,602 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 02:58:46,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 02:58:46,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 02:58:46,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 02:58:46,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 02:58:46,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 02:58:46,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 02:58:46,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 02:58:46,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 02:58:46,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 02:58:46,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 02:58:46,613 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 02:58:46,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 02:58:46,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 02:58:46,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 02:58:46,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 02:58:46,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 02:58:46,620 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 02:58:46,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 02:58:46,623 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 02:58:46,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 02:58:46,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 02:58:46,625 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 02:58:46,627 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 02:58:46,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 02:58:46,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 02:58:46,633 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 02:58:46,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 02:58:46,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 02:58:46,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 02:58:46,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 02:58:46,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 02:58:46,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 02:58:46,639 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 [2019-10-15 02:58:46,659 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 02:58:46,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 02:58:46,661 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 02:58:46,661 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 02:58:46,661 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 02:58:46,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 02:58:46,662 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 02:58:46,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 02:58:46,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 02:58:46,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 02:58:46,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 02:58:46,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 02:58:46,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 02:58:46,663 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 02:58:46,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 02:58:46,664 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 02:58:46,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 02:58:46,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 02:58:46,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 02:58:46,665 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 02:58:46,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 02:58:46,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 02:58:46,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 02:58:46,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 02:58:46,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 02:58:46,666 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 02:58:46,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 02:58:46,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 02:58:46,666 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 [2019-10-15 02:58:46,926 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 02:58:46,943 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 02:58:46,947 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 02:58:46,949 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 02:58:46,949 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 02:58:46,950 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-1.i [2019-10-15 02:58:47,040 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34334e8c2/ffaf0b256cf24101916ac97101875630/FLAGc8929d6c8 [2019-10-15 02:58:47,598 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 02:58:47,598 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list-1.i [2019-10-15 02:58:47,619 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34334e8c2/ffaf0b256cf24101916ac97101875630/FLAGc8929d6c8 [2019-10-15 02:58:47,898 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34334e8c2/ffaf0b256cf24101916ac97101875630 [2019-10-15 02:58:47,908 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 02:58:47,910 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 02:58:47,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 02:58:47,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 02:58:47,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 02:58:47,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:58:47" (1/1) ... [2019-10-15 02:58:47,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d6ac0c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:47, skipping insertion in model container [2019-10-15 02:58:47,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:58:47" (1/1) ... [2019-10-15 02:58:47,924 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 02:58:47,971 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 02:58:48,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 02:58:48,425 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 02:58:48,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 02:58:48,549 INFO L192 MainTranslator]: Completed translation [2019-10-15 02:58:48,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:48 WrapperNode [2019-10-15 02:58:48,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 02:58:48,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 02:58:48,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 02:58:48,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 02:58:48,566 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:48" (1/1) ... [2019-10-15 02:58:48,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:48" (1/1) ... [2019-10-15 02:58:48,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:48" (1/1) ... [2019-10-15 02:58:48,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:48" (1/1) ... [2019-10-15 02:58:48,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:48" (1/1) ... [2019-10-15 02:58:48,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:48" (1/1) ... [2019-10-15 02:58:48,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:48" (1/1) ... [2019-10-15 02:58:48,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 02:58:48,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 02:58:48,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 02:58:48,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 02:58:48,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:48" (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 [2019-10-15 02:58:48,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 02:58:48,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 02:58:48,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-15 02:58:48,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-15 02:58:48,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-10-15 02:58:48,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-10-15 02:58:48,684 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-10-15 02:58:48,684 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-15 02:58:48,684 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 02:58:48,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 02:58:48,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 02:58:48,685 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-15 02:58:48,685 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-15 02:58:48,685 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-15 02:58:48,685 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-15 02:58:48,685 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-15 02:58:48,685 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-15 02:58:48,686 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-15 02:58:48,686 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-15 02:58:48,686 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-15 02:58:48,686 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-15 02:58:48,686 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-15 02:58:48,686 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-15 02:58:48,687 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-15 02:58:48,687 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-15 02:58:48,687 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-15 02:58:48,687 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-15 02:58:48,687 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-15 02:58:48,687 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-15 02:58:48,688 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-10-15 02:58:48,688 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-10-15 02:58:48,688 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-10-15 02:58:48,688 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-15 02:58:48,688 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-15 02:58:48,689 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-15 02:58:48,689 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-15 02:58:48,689 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-15 02:58:48,689 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-15 02:58:48,689 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-15 02:58:48,689 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-15 02:58:48,690 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-15 02:58:48,690 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-15 02:58:48,690 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-15 02:58:48,690 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-15 02:58:48,690 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-15 02:58:48,690 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-15 02:58:48,690 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-15 02:58:48,691 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-15 02:58:48,691 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-15 02:58:48,691 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-15 02:58:48,691 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-15 02:58:48,691 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-15 02:58:48,691 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-15 02:58:48,692 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-15 02:58:48,692 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-15 02:58:48,692 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-15 02:58:48,692 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-15 02:58:48,692 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-15 02:58:48,692 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-15 02:58:48,693 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-15 02:58:48,693 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-15 02:58:48,693 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-15 02:58:48,693 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-15 02:58:48,693 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-15 02:58:48,693 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-15 02:58:48,693 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-15 02:58:48,694 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 02:58:48,694 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-15 02:58:48,694 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-15 02:58:48,694 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 02:58:48,694 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-15 02:58:48,694 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-15 02:58:48,695 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-15 02:58:48,695 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-15 02:58:48,695 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-15 02:58:48,695 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-15 02:58:48,695 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-15 02:58:48,695 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-15 02:58:48,696 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 02:58:48,696 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-15 02:58:48,696 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-15 02:58:48,696 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-15 02:58:48,696 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-15 02:58:48,696 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-15 02:58:48,697 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-15 02:58:48,697 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-15 02:58:48,697 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-15 02:58:48,697 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-15 02:58:48,697 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-15 02:58:48,697 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-15 02:58:48,697 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-15 02:58:48,698 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-15 02:58:48,698 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-15 02:58:48,698 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-15 02:58:48,698 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-15 02:58:48,698 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-15 02:58:48,698 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-15 02:58:48,699 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-15 02:58:48,699 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-15 02:58:48,699 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-15 02:58:48,699 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-15 02:58:48,699 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-15 02:58:48,699 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-15 02:58:48,699 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-15 02:58:48,700 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-15 02:58:48,700 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-15 02:58:48,700 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-15 02:58:48,700 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-15 02:58:48,700 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-15 02:58:48,700 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-15 02:58:48,700 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-15 02:58:48,701 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-15 02:58:48,701 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-15 02:58:48,701 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-15 02:58:48,701 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-15 02:58:48,701 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-15 02:58:48,701 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-15 02:58:48,701 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-15 02:58:48,702 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-15 02:58:48,702 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 02:58:48,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 02:58:48,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 02:58:48,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 02:58:48,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 02:58:48,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 02:58:48,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 02:58:48,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 02:58:48,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 02:58:49,105 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-15 02:58:49,321 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 02:58:49,321 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-15 02:58:49,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:58:49 BoogieIcfgContainer [2019-10-15 02:58:49,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 02:58:49,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 02:58:49,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 02:58:49,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 02:58:49,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:58:47" (1/3) ... [2019-10-15 02:58:49,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43feb006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:58:49, skipping insertion in model container [2019-10-15 02:58:49,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:48" (2/3) ... [2019-10-15 02:58:49,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43feb006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:58:49, skipping insertion in model container [2019-10-15 02:58:49,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:58:49" (3/3) ... [2019-10-15 02:58:49,332 INFO L109 eAbstractionObserver]: Analyzing ICFG list-1.i [2019-10-15 02:58:49,342 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 02:58:49,351 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 02:58:49,363 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 02:58:49,390 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 02:58:49,390 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 02:58:49,390 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 02:58:49,391 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 02:58:49,391 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 02:58:49,391 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 02:58:49,392 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 02:58:49,392 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 02:58:49,412 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-10-15 02:58:49,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 02:58:49,420 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:49,421 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:49,423 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:49,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:49,429 INFO L82 PathProgramCache]: Analyzing trace with hash 725742413, now seen corresponding path program 1 times [2019-10-15 02:58:49,438 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:49,439 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247074005] [2019-10-15 02:58:49,439 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:49,439 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:49,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:49,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:49,585 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247074005] [2019-10-15 02:58:49,586 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:58:49,586 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 02:58:49,587 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657432211] [2019-10-15 02:58:49,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 02:58:49,592 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:49,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 02:58:49,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 02:58:49,610 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2019-10-15 02:58:49,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:58:49,636 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2019-10-15 02:58:49,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 02:58:49,638 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-10-15 02:58:49,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:58:49,647 INFO L225 Difference]: With dead ends: 53 [2019-10-15 02:58:49,647 INFO L226 Difference]: Without dead ends: 24 [2019-10-15 02:58:49,651 INFO L600 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 [2019-10-15 02:58:49,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-15 02:58:49,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-15 02:58:49,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 02:58:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-10-15 02:58:49,691 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2019-10-15 02:58:49,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:58:49,692 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-10-15 02:58:49,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 02:58:49,692 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-10-15 02:58:49,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 02:58:49,693 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:49,693 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:49,694 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:49,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:49,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1996990469, now seen corresponding path program 1 times [2019-10-15 02:58:49,695 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:49,695 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56241965] [2019-10-15 02:58:49,695 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:49,695 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:49,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:49,818 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56241965] [2019-10-15 02:58:49,818 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:58:49,819 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 02:58:49,819 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198568293] [2019-10-15 02:58:49,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 02:58:49,821 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:49,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 02:58:49,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 02:58:49,822 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 5 states. [2019-10-15 02:58:49,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:58:49,977 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2019-10-15 02:58:49,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 02:58:49,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-10-15 02:58:49,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:58:49,981 INFO L225 Difference]: With dead ends: 49 [2019-10-15 02:58:49,981 INFO L226 Difference]: Without dead ends: 45 [2019-10-15 02:58:49,982 INFO L600 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 [2019-10-15 02:58:49,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-15 02:58:49,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2019-10-15 02:58:49,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-15 02:58:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-10-15 02:58:49,990 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 19 [2019-10-15 02:58:49,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:58:49,991 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-10-15 02:58:49,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 02:58:49,991 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-10-15 02:58:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 02:58:49,992 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:49,992 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:49,993 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:49,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:49,993 INFO L82 PathProgramCache]: Analyzing trace with hash -693863968, now seen corresponding path program 1 times [2019-10-15 02:58:49,993 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:49,994 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228084539] [2019-10-15 02:58:49,994 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:49,994 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:49,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:50,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228084539] [2019-10-15 02:58:50,081 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:58:50,081 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 02:58:50,082 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017580551] [2019-10-15 02:58:50,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 02:58:50,084 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:50,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 02:58:50,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 02:58:50,085 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 5 states. [2019-10-15 02:58:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:58:50,191 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2019-10-15 02:58:50,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 02:58:50,192 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-15 02:58:50,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:58:50,193 INFO L225 Difference]: With dead ends: 51 [2019-10-15 02:58:50,193 INFO L226 Difference]: Without dead ends: 43 [2019-10-15 02:58:50,194 INFO L600 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 [2019-10-15 02:58:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-15 02:58:50,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2019-10-15 02:58:50,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-15 02:58:50,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-10-15 02:58:50,200 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2019-10-15 02:58:50,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:58:50,200 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-10-15 02:58:50,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 02:58:50,201 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-10-15 02:58:50,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 02:58:50,201 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:50,202 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:50,202 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:50,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:50,202 INFO L82 PathProgramCache]: Analyzing trace with hash 330839008, now seen corresponding path program 1 times [2019-10-15 02:58:50,203 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:50,203 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655184168] [2019-10-15 02:58:50,203 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:50,203 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:50,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:50,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:50,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655184168] [2019-10-15 02:58:50,265 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:58:50,265 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 02:58:50,265 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268914336] [2019-10-15 02:58:50,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 02:58:50,266 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:50,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 02:58:50,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 02:58:50,267 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 5 states. [2019-10-15 02:58:50,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:58:50,354 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2019-10-15 02:58:50,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 02:58:50,354 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-15 02:58:50,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:58:50,356 INFO L225 Difference]: With dead ends: 51 [2019-10-15 02:58:50,356 INFO L226 Difference]: Without dead ends: 40 [2019-10-15 02:58:50,356 INFO L600 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 [2019-10-15 02:58:50,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-15 02:58:50,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2019-10-15 02:58:50,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-15 02:58:50,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-15 02:58:50,362 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 21 [2019-10-15 02:58:50,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:58:50,362 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-15 02:58:50,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 02:58:50,363 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-15 02:58:50,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 02:58:50,363 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:50,364 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:50,364 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:50,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:50,364 INFO L82 PathProgramCache]: Analyzing trace with hash -441963284, now seen corresponding path program 1 times [2019-10-15 02:58:50,365 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:50,365 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753214269] [2019-10-15 02:58:50,365 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:50,365 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:50,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:50,500 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753214269] [2019-10-15 02:58:50,500 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597294579] [2019-10-15 02:58:50,501 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 [2019-10-15 02:58:50,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:50,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 02:58:50,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:58:50,700 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 [2019-10-15 02:58:50,701 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:50,707 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:58:50,707 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-15 02:58:50,708 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-10-15 02:58:50,740 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:58:50,741 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 [2019-10-15 02:58:50,742 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:50,752 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:58:50,758 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2019-10-15 02:58:50,759 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:50,769 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:58:50,769 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 02:58:50,770 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:28, output treesize:18 [2019-10-15 02:58:50,795 INFO L341 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2019-10-15 02:58:50,796 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 [2019-10-15 02:58:50,797 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:50,802 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:58:50,803 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 02:58:50,803 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:12 [2019-10-15 02:58:50,829 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 [2019-10-15 02:58:50,830 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:50,838 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:58:50,839 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. [2019-10-15 02:58:50,839 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:19 [2019-10-15 02:58:50,875 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 [2019-10-15 02:58:50,876 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:50,888 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:58:50,888 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 02:58:50,889 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:26, output treesize:3 [2019-10-15 02:58:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:50,895 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:58:50,936 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:58:50,952 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:50,956 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-15 02:58:50,969 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:58:50,970 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-10-15 02:58:50,971 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:54, output treesize:22 [2019-10-15 02:58:51,001 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:58:51,017 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 170 treesize of output 162 [2019-10-15 02:58:51,017 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:58:51,018 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:58:51,036 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:58:51,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 02:58:51,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:58:51,039 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:58:51,044 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:51,155 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2019-10-15 02:58:51,155 INFO L567 ElimStorePlain]: treesize reduction 307, result has 10.2 percent of original size [2019-10-15 02:58:51,156 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-10-15 02:58:51,156 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:21 [2019-10-15 02:58:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:51,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1640065929] [2019-10-15 02:58:51,316 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 02:58:51,316 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 02:58:51,322 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 02:58:51,330 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 02:58:51,330 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 02:58:51,434 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 02:58:52,777 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 02:58:52,783 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 02:58:53,320 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2019-10-15 02:58:53,511 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2019-10-15 02:58:53,603 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 02:58:53,603 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 12] total 24 [2019-10-15 02:58:53,603 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255351885] [2019-10-15 02:58:53,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 02:58:53,605 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:53,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 02:58:53,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2019-10-15 02:58:53,606 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 24 states. [2019-10-15 02:58:55,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:58:55,285 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2019-10-15 02:58:55,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-15 02:58:55,286 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2019-10-15 02:58:55,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:58:55,287 INFO L225 Difference]: With dead ends: 72 [2019-10-15 02:58:55,287 INFO L226 Difference]: Without dead ends: 68 [2019-10-15 02:58:55,289 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=360, Invalid=1802, Unknown=0, NotChecked=0, Total=2162 [2019-10-15 02:58:55,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-15 02:58:55,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 37. [2019-10-15 02:58:55,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-15 02:58:55,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2019-10-15 02:58:55,299 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 23 [2019-10-15 02:58:55,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:58:55,300 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2019-10-15 02:58:55,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-15 02:58:55,300 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2019-10-15 02:58:55,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 02:58:55,301 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:55,301 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:55,506 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:58:55,506 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:55,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:55,507 INFO L82 PathProgramCache]: Analyzing trace with hash 421438380, now seen corresponding path program 1 times [2019-10-15 02:58:55,507 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:55,507 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202871799] [2019-10-15 02:58:55,507 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:55,507 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:55,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:55,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:55,638 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202871799] [2019-10-15 02:58:55,638 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528976919] [2019-10-15 02:58:55,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-15 02:58:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:55,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 02:58:55,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:58:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:55,875 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:58:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:56,061 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [315294329] [2019-10-15 02:58:56,063 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 02:58:56,063 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 02:58:56,064 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 02:58:56,064 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 02:58:56,064 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 02:58:56,105 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 02:58:56,328 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:56,434 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 02:58:56,438 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 02:58:57,132 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 02:58:57,132 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 16] total 28 [2019-10-15 02:58:57,133 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218625914] [2019-10-15 02:58:57,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-15 02:58:57,134 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:57,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-15 02:58:57,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2019-10-15 02:58:57,135 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 28 states. [2019-10-15 02:58:58,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:58:58,881 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2019-10-15 02:58:58,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-15 02:58:58,882 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 23 [2019-10-15 02:58:58,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:58:58,883 INFO L225 Difference]: With dead ends: 49 [2019-10-15 02:58:58,883 INFO L226 Difference]: Without dead ends: 43 [2019-10-15 02:58:58,885 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=282, Invalid=1788, Unknown=0, NotChecked=0, Total=2070 [2019-10-15 02:58:58,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-15 02:58:58,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2019-10-15 02:58:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-15 02:58:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-10-15 02:58:58,891 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 23 [2019-10-15 02:58:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:58:58,892 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-10-15 02:58:58,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-15 02:58:58,892 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-10-15 02:58:58,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 02:58:58,893 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:58,893 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:59,096 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:58:59,097 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:59,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:59,098 INFO L82 PathProgramCache]: Analyzing trace with hash 523723015, now seen corresponding path program 1 times [2019-10-15 02:58:59,098 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:59,098 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005813301] [2019-10-15 02:58:59,099 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:59,099 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:59,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:59,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:59,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:59,294 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005813301] [2019-10-15 02:58:59,294 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758520439] [2019-10-15 02:58:59,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:58:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:59,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-15 02:58:59,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:58:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:59,768 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:59:00,077 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2019-10-15 02:59:00,224 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2019-10-15 02:59:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:59:00,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1479810479] [2019-10-15 02:59:00,358 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 02:59:00,358 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 02:59:00,359 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 02:59:00,359 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 02:59:00,359 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 02:59:00,379 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 02:59:01,223 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 02:59:01,229 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 02:59:01,836 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2019-10-15 02:59:02,039 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2019-10-15 02:59:02,152 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 02:59:02,153 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 12] total 29 [2019-10-15 02:59:02,153 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478898482] [2019-10-15 02:59:02,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-15 02:59:02,154 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:59:02,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-15 02:59:02,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2019-10-15 02:59:02,155 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 29 states. [2019-10-15 02:59:04,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:59:04,094 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2019-10-15 02:59:04,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 02:59:04,094 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 25 [2019-10-15 02:59:04,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:59:04,096 INFO L225 Difference]: With dead ends: 90 [2019-10-15 02:59:04,096 INFO L226 Difference]: Without dead ends: 84 [2019-10-15 02:59:04,098 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=435, Invalid=2535, Unknown=0, NotChecked=0, Total=2970 [2019-10-15 02:59:04,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-15 02:59:04,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2019-10-15 02:59:04,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-15 02:59:04,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2019-10-15 02:59:04,108 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 25 [2019-10-15 02:59:04,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:59:04,108 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2019-10-15 02:59:04,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-15 02:59:04,109 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2019-10-15 02:59:04,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-15 02:59:04,110 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:59:04,110 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:59:04,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:59:04,314 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:59:04,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:59:04,315 INFO L82 PathProgramCache]: Analyzing trace with hash 835320418, now seen corresponding path program 2 times [2019-10-15 02:59:04,315 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:59:04,315 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417304514] [2019-10-15 02:59:04,315 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:04,316 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:04,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:59:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:59:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:59:04,443 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417304514] [2019-10-15 02:59:04,443 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231102311] [2019-10-15 02:59:04,444 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:59:04,588 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 02:59:04,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 02:59:04,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-15 02:59:04,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:59:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:59:04,808 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:59:05,115 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2019-10-15 02:59:05,257 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-10-15 02:59:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:59:05,376 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1476326976] [2019-10-15 02:59:05,378 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 02:59:05,378 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 02:59:05,378 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 02:59:05,379 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 02:59:05,379 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 02:59:05,401 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 02:59:06,087 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 02:59:06,089 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 02:59:06,588 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2019-10-15 02:59:06,798 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2019-10-15 02:59:06,909 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 02:59:06,909 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 12] total 28 [2019-10-15 02:59:06,909 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58354549] [2019-10-15 02:59:06,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-15 02:59:06,910 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:59:06,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-15 02:59:06,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2019-10-15 02:59:06,911 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 28 states. [2019-10-15 02:59:08,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:59:08,594 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2019-10-15 02:59:08,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-15 02:59:08,594 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2019-10-15 02:59:08,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:59:08,596 INFO L225 Difference]: With dead ends: 90 [2019-10-15 02:59:08,596 INFO L226 Difference]: Without dead ends: 78 [2019-10-15 02:59:08,598 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=392, Invalid=2578, Unknown=0, NotChecked=0, Total=2970 [2019-10-15 02:59:08,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-15 02:59:08,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 52. [2019-10-15 02:59:08,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-15 02:59:08,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2019-10-15 02:59:08,605 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 27 [2019-10-15 02:59:08,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:59:08,605 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2019-10-15 02:59:08,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-15 02:59:08,606 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2019-10-15 02:59:08,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-15 02:59:08,607 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:59:08,607 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:59:08,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:59:08,814 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:59:08,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:59:08,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1242894750, now seen corresponding path program 1 times [2019-10-15 02:59:08,814 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:59:08,814 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563578643] [2019-10-15 02:59:08,814 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:08,814 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:08,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:59:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:59:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 02:59:08,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563578643] [2019-10-15 02:59:08,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670439967] [2019-10-15 02:59:08,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:59:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:59:09,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-15 02:59:09,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:59:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 02:59:09,148 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:59:09,325 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 32 [2019-10-15 02:59:09,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 02:59:09,457 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [256112769] [2019-10-15 02:59:09,458 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 02:59:09,458 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 02:59:09,459 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 02:59:09,459 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 02:59:09,459 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 02:59:09,480 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 02:59:10,207 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 02:59:10,212 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 02:59:10,705 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2019-10-15 02:59:10,949 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2019-10-15 02:59:11,065 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 02:59:11,065 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7, 14] total 28 [2019-10-15 02:59:11,065 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543841568] [2019-10-15 02:59:11,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-15 02:59:11,067 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:59:11,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-15 02:59:11,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2019-10-15 02:59:11,068 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 28 states. [2019-10-15 02:59:13,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:59:13,369 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2019-10-15 02:59:13,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-10-15 02:59:13,370 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2019-10-15 02:59:13,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:59:13,371 INFO L225 Difference]: With dead ends: 97 [2019-10-15 02:59:13,372 INFO L226 Difference]: Without dead ends: 84 [2019-10-15 02:59:13,374 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=508, Invalid=3398, Unknown=0, NotChecked=0, Total=3906 [2019-10-15 02:59:13,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-15 02:59:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 59. [2019-10-15 02:59:13,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-15 02:59:13,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2019-10-15 02:59:13,388 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 27 [2019-10-15 02:59:13,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:59:13,389 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2019-10-15 02:59:13,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-15 02:59:13,389 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2019-10-15 02:59:13,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-15 02:59:13,392 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:59:13,392 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:59:13,599 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:59:13,600 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:59:13,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:59:13,601 INFO L82 PathProgramCache]: Analyzing trace with hash -943192798, now seen corresponding path program 1 times [2019-10-15 02:59:13,601 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:59:13,602 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160837236] [2019-10-15 02:59:13,602 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:13,602 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:13,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:59:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:59:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:59:13,720 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160837236] [2019-10-15 02:59:13,720 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253477632] [2019-10-15 02:59:13,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:59:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:59:13,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-15 02:59:13,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:59:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:59:14,161 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:59:14,601 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2019-10-15 02:59:14,807 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2019-10-15 02:59:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:59:14,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [4420793] [2019-10-15 02:59:14,913 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 02:59:14,914 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 02:59:14,914 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 02:59:14,914 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 02:59:14,915 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 02:59:14,935 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 02:59:15,102 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:59:15,264 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 02:59:15,270 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 02:59:16,187 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 02:59:16,187 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 14] total 33 [2019-10-15 02:59:16,188 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201465284] [2019-10-15 02:59:16,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-15 02:59:16,189 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:59:16,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-15 02:59:16,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2019-10-15 02:59:16,190 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 33 states. [2019-10-15 02:59:16,563 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2019-10-15 02:59:16,785 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2019-10-15 02:59:17,008 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2019-10-15 02:59:17,186 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2019-10-15 02:59:18,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:59:18,799 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2019-10-15 02:59:18,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-15 02:59:18,800 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 27 [2019-10-15 02:59:18,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:59:18,801 INFO L225 Difference]: With dead ends: 73 [2019-10-15 02:59:18,801 INFO L226 Difference]: Without dead ends: 60 [2019-10-15 02:59:18,802 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=397, Invalid=2909, Unknown=0, NotChecked=0, Total=3306 [2019-10-15 02:59:18,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-15 02:59:18,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2019-10-15 02:59:18,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-15 02:59:18,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2019-10-15 02:59:18,809 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 27 [2019-10-15 02:59:18,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:59:18,809 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2019-10-15 02:59:18,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-15 02:59:18,809 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2019-10-15 02:59:18,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 02:59:18,810 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:59:18,810 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:59:19,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:59:19,019 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:59:19,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:59:19,020 INFO L82 PathProgramCache]: Analyzing trace with hash -2010882898, now seen corresponding path program 3 times [2019-10-15 02:59:19,020 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:59:19,020 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920075359] [2019-10-15 02:59:19,020 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:19,020 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:19,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:59:19,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:59:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:59:19,268 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920075359] [2019-10-15 02:59:19,268 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445958534] [2019-10-15 02:59:19,269 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:59:19,480 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 02:59:19,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 02:59:19,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 60 conjunts are in the unsatisfiable core [2019-10-15 02:59:19,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:59:20,223 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2019-10-15 02:59:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:59:21,012 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:59:23,004 WARN L191 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 185 DAG size of output: 79