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/array-examples/relax-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-06 23:16:54,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-06 23:16:54,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-06 23:16:54,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-06 23:16:54,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-06 23:16:54,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-06 23:16:54,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-06 23:16:54,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-06 23:16:54,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-06 23:16:54,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-06 23:16:54,359 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-06 23:16:54,361 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-06 23:16:54,361 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-06 23:16:54,362 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-06 23:16:54,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-06 23:16:54,366 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-06 23:16:54,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-06 23:16:54,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-06 23:16:54,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-06 23:16:54,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-06 23:16:54,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-06 23:16:54,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-06 23:16:54,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-06 23:16:54,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-06 23:16:54,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-06 23:16:54,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-06 23:16:54,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-06 23:16:54,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-06 23:16:54,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-06 23:16:54,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-06 23:16:54,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-06 23:16:54,390 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-06 23:16:54,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-06 23:16:54,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-06 23:16:54,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-06 23:16:54,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-06 23:16:54,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-06 23:16:54,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-06 23:16:54,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-06 23:16:54,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-06 23:16:54,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-06 23:16:54,396 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 [2019-10-06 23:16:54,429 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-06 23:16:54,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-06 23:16:54,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-06 23:16:54,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-06 23:16:54,434 INFO L138 SettingsManager]: * Use SBE=true [2019-10-06 23:16:54,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-06 23:16:54,435 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-06 23:16:54,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-06 23:16:54,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-06 23:16:54,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-06 23:16:54,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-06 23:16:54,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-06 23:16:54,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-06 23:16:54,439 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-06 23:16:54,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-06 23:16:54,440 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-06 23:16:54,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-06 23:16:54,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-06 23:16:54,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-06 23:16:54,440 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-06 23:16:54,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-06 23:16:54,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-06 23:16:54,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-06 23:16:54,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-06 23:16:54,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-06 23:16:54,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-06 23:16:54,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-06 23:16:54,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-06 23:16:54,445 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 [2019-10-06 23:16:54,727 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-06 23:16:54,743 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-06 23:16:54,746 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-06 23:16:54,747 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-06 23:16:54,748 INFO L275 PluginConnector]: CDTParser initialized [2019-10-06 23:16:54,748 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/relax-2.i [2019-10-06 23:16:54,817 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f31ae1e4/2ed19b896f274d8b90a68a1812cdb063/FLAG82ce99ba2 [2019-10-06 23:16:55,323 INFO L306 CDTParser]: Found 1 translation units. [2019-10-06 23:16:55,325 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/relax-2.i [2019-10-06 23:16:55,340 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f31ae1e4/2ed19b896f274d8b90a68a1812cdb063/FLAG82ce99ba2 [2019-10-06 23:16:55,636 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f31ae1e4/2ed19b896f274d8b90a68a1812cdb063 [2019-10-06 23:16:55,644 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-06 23:16:55,645 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-06 23:16:55,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-06 23:16:55,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-06 23:16:55,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-06 23:16:55,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.10 11:16:55" (1/1) ... [2019-10-06 23:16:55,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@596bf86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 11:16:55, skipping insertion in model container [2019-10-06 23:16:55,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.10 11:16:55" (1/1) ... [2019-10-06 23:16:55,662 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-06 23:16:55,719 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-06 23:16:56,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-06 23:16:56,139 INFO L188 MainTranslator]: Completed pre-run [2019-10-06 23:16:56,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-06 23:16:56,241 INFO L192 MainTranslator]: Completed translation [2019-10-06 23:16:56,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 11:16:56 WrapperNode [2019-10-06 23:16:56,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-06 23:16:56,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-06 23:16:56,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-06 23:16:56,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-06 23:16:56,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 11:16:56" (1/1) ... [2019-10-06 23:16:56,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 11:16:56" (1/1) ... [2019-10-06 23:16:56,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 11:16:56" (1/1) ... [2019-10-06 23:16:56,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 11:16:56" (1/1) ... [2019-10-06 23:16:56,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 11:16:56" (1/1) ... [2019-10-06 23:16:56,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 11:16:56" (1/1) ... [2019-10-06 23:16:56,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 11:16:56" (1/1) ... [2019-10-06 23:16:56,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-06 23:16:56,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-06 23:16:56,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-06 23:16:56,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-06 23:16:56,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 11:16:56" (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 [2019-10-06 23:16:56,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-06 23:16:56,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-06 23:16:56,362 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-06 23:16:56,362 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-06 23:16:56,362 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-06 23:16:56,362 INFO L138 BoogieDeclarations]: Found implementation of procedure is_relaxed_prefix [2019-10-06 23:16:56,363 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-06 23:16:56,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-10-06 23:16:56,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-06 23:16:56,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-06 23:16:56,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-06 23:16:56,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-06 23:16:56,364 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-06 23:16:56,364 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-06 23:16:56,364 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-06 23:16:56,364 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-06 23:16:56,364 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-06 23:16:56,365 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-06 23:16:56,365 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-06 23:16:56,365 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-06 23:16:56,365 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-06 23:16:56,365 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-06 23:16:56,365 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-06 23:16:56,366 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-06 23:16:56,366 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-06 23:16:56,366 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-06 23:16:56,366 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-06 23:16:56,366 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-06 23:16:56,366 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-06 23:16:56,367 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-06 23:16:56,367 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-06 23:16:56,367 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-06 23:16:56,367 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-06 23:16:56,367 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-06 23:16:56,367 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-06 23:16:56,368 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-06 23:16:56,368 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-06 23:16:56,368 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-06 23:16:56,368 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-06 23:16:56,368 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-06 23:16:56,368 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-06 23:16:56,368 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-06 23:16:56,368 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-06 23:16:56,369 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-06 23:16:56,369 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-06 23:16:56,369 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-06 23:16:56,369 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-06 23:16:56,369 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-06 23:16:56,369 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-06 23:16:56,369 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-06 23:16:56,370 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-06 23:16:56,370 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-06 23:16:56,370 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-06 23:16:56,370 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-06 23:16:56,370 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-06 23:16:56,370 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-06 23:16:56,370 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-06 23:16:56,370 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-06 23:16:56,370 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-06 23:16:56,371 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-06 23:16:56,371 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-06 23:16:56,371 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-06 23:16:56,371 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-06 23:16:56,371 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-06 23:16:56,371 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-06 23:16:56,371 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-06 23:16:56,371 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-06 23:16:56,372 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-06 23:16:56,372 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-06 23:16:56,372 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-06 23:16:56,372 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-06 23:16:56,372 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-06 23:16:56,372 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-06 23:16:56,372 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-06 23:16:56,373 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-06 23:16:56,373 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-06 23:16:56,373 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-06 23:16:56,373 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-06 23:16:56,373 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-06 23:16:56,373 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-06 23:16:56,374 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-06 23:16:56,374 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-06 23:16:56,374 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-06 23:16:56,374 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-06 23:16:56,374 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-06 23:16:56,374 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-06 23:16:56,374 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-06 23:16:56,375 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-06 23:16:56,375 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-06 23:16:56,375 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-06 23:16:56,375 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-06 23:16:56,375 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-06 23:16:56,375 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-06 23:16:56,375 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-06 23:16:56,376 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-06 23:16:56,376 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-06 23:16:56,376 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-06 23:16:56,376 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-06 23:16:56,376 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-06 23:16:56,376 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-06 23:16:56,376 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-06 23:16:56,377 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-06 23:16:56,377 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-06 23:16:56,377 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-06 23:16:56,377 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-06 23:16:56,377 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-06 23:16:56,377 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-06 23:16:56,377 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-06 23:16:56,378 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-06 23:16:56,378 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-06 23:16:56,378 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-06 23:16:56,378 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-06 23:16:56,378 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-06 23:16:56,378 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-06 23:16:56,378 INFO L130 BoogieDeclarations]: Found specification of procedure is_relaxed_prefix [2019-10-06 23:16:56,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-06 23:16:56,379 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-06 23:16:56,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-06 23:16:56,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-06 23:16:56,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-06 23:16:56,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-06 23:16:56,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-06 23:16:57,114 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-06 23:16:57,115 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-06 23:16:57,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.10 11:16:57 BoogieIcfgContainer [2019-10-06 23:16:57,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-06 23:16:57,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-06 23:16:57,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-06 23:16:57,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-06 23:16:57,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.10 11:16:55" (1/3) ... [2019-10-06 23:16:57,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb2dcd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.10 11:16:57, skipping insertion in model container [2019-10-06 23:16:57,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 11:16:56" (2/3) ... [2019-10-06 23:16:57,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb2dcd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.10 11:16:57, skipping insertion in model container [2019-10-06 23:16:57,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.10 11:16:57" (3/3) ... [2019-10-06 23:16:57,132 INFO L109 eAbstractionObserver]: Analyzing ICFG relax-2.i [2019-10-06 23:16:57,142 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-06 23:16:57,153 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-06 23:16:57,164 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-06 23:16:57,190 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-06 23:16:57,191 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-06 23:16:57,191 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-06 23:16:57,191 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-06 23:16:57,191 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-06 23:16:57,191 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-06 23:16:57,192 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-06 23:16:57,192 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-06 23:16:57,207 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-10-06 23:16:57,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-06 23:16:57,212 INFO L377 BasicCegarLoop]: Found error trace [2019-10-06 23:16:57,213 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-06 23:16:57,214 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-06 23:16:57,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-06 23:16:57,219 INFO L82 PathProgramCache]: Analyzing trace with hash -79995857, now seen corresponding path program 1 times [2019-10-06 23:16:57,228 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-06 23:16:57,229 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-06 23:16:57,229 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-06 23:16:57,229 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-06 23:16:57,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-06 23:16:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-06 23:16:57,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-06 23:16:57,458 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-06 23:16:57,459 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-06 23:16:57,460 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-06 23:16:57,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-06 23:16:57,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-06 23:16:57,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-06 23:16:57,480 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 4 states. [2019-10-06 23:16:57,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-06 23:16:57,528 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2019-10-06 23:16:57,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-06 23:16:57,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-10-06 23:16:57,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-06 23:16:57,542 INFO L225 Difference]: With dead ends: 61 [2019-10-06 23:16:57,543 INFO L226 Difference]: Without dead ends: 38 [2019-10-06 23:16:57,552 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-06 23:16:57,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-06 23:16:57,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-06 23:16:57,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-06 23:16:57,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2019-10-06 23:16:57,594 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 17 [2019-10-06 23:16:57,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-06 23:16:57,594 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2019-10-06 23:16:57,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-06 23:16:57,594 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2019-10-06 23:16:57,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-06 23:16:57,595 INFO L377 BasicCegarLoop]: Found error trace [2019-10-06 23:16:57,596 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-06 23:16:57,596 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-06 23:16:57,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-06 23:16:57,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1718639790, now seen corresponding path program 1 times [2019-10-06 23:16:57,597 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-06 23:16:57,597 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-06 23:16:57,597 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-06 23:16:57,597 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-06 23:16:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-06 23:16:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-06 23:16:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-06 23:16:57,720 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-06 23:16:57,721 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-06 23:16:57,722 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-06 23:16:57,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-06 23:16:57,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-06 23:16:57,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-06 23:16:57,724 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand 6 states. [2019-10-06 23:16:57,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-06 23:16:57,839 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2019-10-06 23:16:57,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-06 23:16:57,840 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-10-06 23:16:57,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-06 23:16:57,841 INFO L225 Difference]: With dead ends: 68 [2019-10-06 23:16:57,841 INFO L226 Difference]: Without dead ends: 46 [2019-10-06 23:16:57,842 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-06 23:16:57,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-06 23:16:57,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2019-10-06 23:16:57,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-06 23:16:57,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2019-10-06 23:16:57,854 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 18 [2019-10-06 23:16:57,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-06 23:16:57,855 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2019-10-06 23:16:57,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-06 23:16:57,855 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2019-10-06 23:16:57,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-06 23:16:57,857 INFO L377 BasicCegarLoop]: Found error trace [2019-10-06 23:16:57,857 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-06 23:16:57,858 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-06 23:16:57,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-06 23:16:57,858 INFO L82 PathProgramCache]: Analyzing trace with hash -912243692, now seen corresponding path program 1 times [2019-10-06 23:16:57,858 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-06 23:16:57,858 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-06 23:16:57,859 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-06 23:16:57,859 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-06 23:16:57,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-06 23:16:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-06 23:16:58,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-06 23:16:58,170 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-06 23:16:58,170 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-06 23:16:58,170 INFO L95 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 [2019-10-06 23:16:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-06 23:16:58,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-06 23:16:58,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-06 23:16:58,415 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-06 23:16:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-06 23:16:58,462 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-06 23:16:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-06 23:16:58,799 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-06 23:16:58,832 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-06 23:16:58,832 INFO L169 IcfgInterpreter]: Building call graph [2019-10-06 23:16:58,838 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-06 23:16:58,846 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-06 23:16:58,847 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-06 23:16:58,979 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-06 23:16:59,232 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-06 23:16:59,251 INFO L199 IcfgInterpreter]: Interpreting procedure is_relaxed_prefix with input of size 12 for LOIs [2019-10-06 23:16:59,286 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-06 23:16:59,292 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-06 23:16:59,292 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-06 23:16:59,292 INFO L193 IcfgInterpreter]: Reachable states at location L1123-3 satisfy 68#true [2019-10-06 23:16:59,293 INFO L193 IcfgInterpreter]: Reachable states at location L1092 satisfy 152#(and (= |is_relaxed_prefix_#in~pat.offset| is_relaxed_prefix_~pat.offset) (= is_relaxed_prefix_~pat.base |is_relaxed_prefix_#in~pat.base|) (exists ((v_main_~j~0_BEFORE_CALL_4 Int)) (and (<= (mod |is_relaxed_prefix_#in~a_length| 4294967296) 0) (<= (mod |is_relaxed_prefix_#in~pat_length| 4294967296) (mod v_main_~j~0_BEFORE_CALL_4 4294967296)))) (= |is_relaxed_prefix_#in~a.offset| is_relaxed_prefix_~a.offset) (= |is_relaxed_prefix_#in~a_length| is_relaxed_prefix_~a_length) (= |is_relaxed_prefix_#in~a.base| is_relaxed_prefix_~a.base) (= |is_relaxed_prefix_#in~pat_length| is_relaxed_prefix_~pat_length)) [2019-10-06 23:16:59,293 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 143#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-06 23:16:59,293 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 183#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-06 23:16:59,294 INFO L193 IcfgInterpreter]: Reachable states at location is_relaxed_prefixEXIT satisfy 179#(and (<= is_relaxed_prefix_~shift~0 0) (<= 0 is_relaxed_prefix_~i~0) (<= |is_relaxed_prefix_#res| 1) (<= 0 is_relaxed_prefix_~shift~0) (= is_relaxed_prefix_~shift~0 0) (= is_relaxed_prefix_~i~0 0) (<= is_relaxed_prefix_~i~0 0) (<= 1 |is_relaxed_prefix_#res|)) [2019-10-06 23:16:59,294 INFO L193 IcfgInterpreter]: Reachable states at location is_relaxed_prefixENTRY satisfy 147#(exists ((v_main_~j~0_BEFORE_CALL_4 Int)) (and (<= (mod |is_relaxed_prefix_#in~a_length| 4294967296) 0) (<= (mod |is_relaxed_prefix_#in~pat_length| 4294967296) (mod v_main_~j~0_BEFORE_CALL_4 4294967296)))) [2019-10-06 23:16:59,298 INFO L193 IcfgInterpreter]: Reachable states at location L1097-3 satisfy 157#(and (<= 0 is_relaxed_prefix_~i~0) (= is_relaxed_prefix_~pat.base |is_relaxed_prefix_#in~pat.base|) (= 0 is_relaxed_prefix_~shift~0) (= 0 is_relaxed_prefix_~i~0) (= |is_relaxed_prefix_#in~a.base| is_relaxed_prefix_~a.base) (= |is_relaxed_prefix_#in~pat_length| is_relaxed_prefix_~pat_length) (= |is_relaxed_prefix_#in~pat.offset| is_relaxed_prefix_~pat.offset) (<= is_relaxed_prefix_~shift~0 0) (<= 0 is_relaxed_prefix_~shift~0) (not (< (mod (+ is_relaxed_prefix_~a_length 1) 4294967296) (mod is_relaxed_prefix_~pat_length 4294967296))) (<= is_relaxed_prefix_~i~0 0) (exists ((v_main_~j~0_BEFORE_CALL_4 Int)) (and (<= (mod |is_relaxed_prefix_#in~a_length| 4294967296) 0) (<= (mod |is_relaxed_prefix_#in~pat_length| 4294967296) (mod v_main_~j~0_BEFORE_CALL_4 4294967296)))) (= |is_relaxed_prefix_#in~a.offset| is_relaxed_prefix_~a.offset) (= |is_relaxed_prefix_#in~a_length| is_relaxed_prefix_~a_length)) [2019-10-06 23:16:59,298 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-06 23:16:59,298 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-06 23:16:59,299 INFO L193 IcfgInterpreter]: Reachable states at location is_relaxed_prefixFINAL satisfy 168#(and (<= is_relaxed_prefix_~shift~0 0) (<= 0 is_relaxed_prefix_~i~0) (<= |is_relaxed_prefix_#res| 1) (<= 0 is_relaxed_prefix_~shift~0) (= is_relaxed_prefix_~shift~0 0) (= is_relaxed_prefix_~i~0 0) (<= is_relaxed_prefix_~i~0 0) (<= 1 |is_relaxed_prefix_#res|)) [2019-10-06 23:16:59,299 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 188#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-06 23:16:59,299 INFO L193 IcfgInterpreter]: Reachable states at location L7 satisfy 133#(and (or (and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) (and (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1))) (or (and (= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)))) [2019-10-06 23:16:59,300 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-06 23:16:59,300 INFO L193 IcfgInterpreter]: Reachable states at location L1126-3 satisfy 73#(and (= main_~j~1 0) (<= main_~j~1 0) (not (< (mod main_~j~0 4294967296) (mod main_~pat_len~0 4294967296))) (<= 0 main_~j~1)) [2019-10-06 23:16:59,301 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 128#(and (or (and (<= 1 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) (and (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0))) (or (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| 0))) [2019-10-06 23:16:59,301 INFO L193 IcfgInterpreter]: Reachable states at location L1133 satisfy 123#(and (= main_~j~1 0) (<= main_~j~1 0) (not (< (mod main_~j~1 4294967296) (mod main_~a_len~0 4294967296))) (not (< (mod main_~j~0 4294967296) (mod main_~pat_len~0 4294967296))) (<= 0 main_~j~1)) [2019-10-06 23:16:59,305 INFO L193 IcfgInterpreter]: Reachable states at location L1126-4 satisfy 78#(and (= main_~j~1 0) (<= main_~j~1 0) (not (< (mod main_~j~1 4294967296) (mod main_~a_len~0 4294967296))) (not (< (mod main_~j~0 4294967296) (mod main_~pat_len~0 4294967296))) (<= 0 main_~j~1)) [2019-10-06 23:16:59,305 INFO L193 IcfgInterpreter]: Reachable states at location L8 satisfy 138#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-06 23:16:59,306 INFO L193 IcfgInterpreter]: Reachable states at location L1131 satisfy 104#(and (= main_~j~1 0) (<= main_~j~1 0) (not (< (mod main_~j~1 4294967296) (mod main_~a_len~0 4294967296))) (<= 1 |main_#t~ret14|) (not (< (mod main_~j~0 4294967296) (mod main_~pat_len~0 4294967296))) (<= 0 main_~j~1) (<= |main_#t~ret14| 1)) [2019-10-06 23:17:00,132 INFO L211 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-06 23:17:00,133 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 15] total 32 [2019-10-06 23:17:00,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-06 23:17:00,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-06 23:17:00,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2019-10-06 23:17:00,136 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 32 states. [2019-10-06 23:17:01,683 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2019-10-06 23:17:05,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-06 23:17:05,691 INFO L93 Difference]: Finished difference Result 160 states and 239 transitions. [2019-10-06 23:17:05,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-06 23:17:05,691 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 19 [2019-10-06 23:17:05,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-06 23:17:05,696 INFO L225 Difference]: With dead ends: 160 [2019-10-06 23:17:05,696 INFO L226 Difference]: Without dead ends: 117 [2019-10-06 23:17:05,699 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=473, Invalid=3433, Unknown=0, NotChecked=0, Total=3906 [2019-10-06 23:17:05,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-06 23:17:05,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 63. [2019-10-06 23:17:05,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-06 23:17:05,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 90 transitions. [2019-10-06 23:17:05,717 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 90 transitions. Word has length 19 [2019-10-06 23:17:05,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-06 23:17:05,717 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 90 transitions. [2019-10-06 23:17:05,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-06 23:17:05,718 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 90 transitions. [2019-10-06 23:17:05,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-06 23:17:05,719 INFO L377 BasicCegarLoop]: Found error trace [2019-10-06 23:17:05,719 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-06 23:17:05,924 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-06 23:17:05,924 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-06 23:17:05,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-06 23:17:05,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1553628473, now seen corresponding path program 1 times [2019-10-06 23:17:05,925 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-06 23:17:05,925 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-06 23:17:05,925 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-06 23:17:05,926 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-06 23:17:05,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-06 23:17:05,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-06 23:17:06,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-06 23:17:06,039 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-06 23:17:06,039 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-06 23:17:06,039 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-06 23:17:06,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-06 23:17:06,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-06 23:17:06,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-06 23:17:06,040 INFO L87 Difference]: Start difference. First operand 63 states and 90 transitions. Second operand 6 states. [2019-10-06 23:17:06,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-06 23:17:06,121 INFO L93 Difference]: Finished difference Result 81 states and 111 transitions. [2019-10-06 23:17:06,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-06 23:17:06,122 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-10-06 23:17:06,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-06 23:17:06,123 INFO L225 Difference]: With dead ends: 81 [2019-10-06 23:17:06,123 INFO L226 Difference]: Without dead ends: 70 [2019-10-06 23:17:06,124 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-06 23:17:06,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-06 23:17:06,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2019-10-06 23:17:06,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-06 23:17:06,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 93 transitions. [2019-10-06 23:17:06,138 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 93 transitions. Word has length 19 [2019-10-06 23:17:06,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-06 23:17:06,138 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 93 transitions. [2019-10-06 23:17:06,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-06 23:17:06,138 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 93 transitions. [2019-10-06 23:17:06,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-06 23:17:06,140 INFO L377 BasicCegarLoop]: Found error trace [2019-10-06 23:17:06,140 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-06 23:17:06,140 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-06 23:17:06,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-06 23:17:06,140 INFO L82 PathProgramCache]: Analyzing trace with hash 782103735, now seen corresponding path program 1 times [2019-10-06 23:17:06,141 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-06 23:17:06,141 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-06 23:17:06,141 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-06 23:17:06,141 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-06 23:17:06,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-06 23:17:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-06 23:17:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-06 23:17:06,284 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-06 23:17:06,284 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-06 23:17:06,284 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-06 23:17:06,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-06 23:17:06,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-06 23:17:06,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-06 23:17:06,285 INFO L87 Difference]: Start difference. First operand 66 states and 93 transitions. Second operand 8 states. [2019-10-06 23:17:06,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-06 23:17:06,487 INFO L93 Difference]: Finished difference Result 82 states and 110 transitions. [2019-10-06 23:17:06,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-06 23:17:06,490 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-10-06 23:17:06,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-06 23:17:06,492 INFO L225 Difference]: With dead ends: 82 [2019-10-06 23:17:06,492 INFO L226 Difference]: Without dead ends: 62 [2019-10-06 23:17:06,493 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-06 23:17:06,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-06 23:17:06,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-10-06 23:17:06,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-06 23:17:06,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 85 transitions. [2019-10-06 23:17:06,515 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 85 transitions. Word has length 20 [2019-10-06 23:17:06,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-06 23:17:06,516 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 85 transitions. [2019-10-06 23:17:06,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-06 23:17:06,516 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 85 transitions. [2019-10-06 23:17:06,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-06 23:17:06,520 INFO L377 BasicCegarLoop]: Found error trace [2019-10-06 23:17:06,522 INFO L385 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-06 23:17:06,522 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-06 23:17:06,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-06 23:17:06,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1211472267, now seen corresponding path program 1 times [2019-10-06 23:17:06,523 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-06 23:17:06,523 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-06 23:17:06,523 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-06 23:17:06,523 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-06 23:17:06,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-06 23:17:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-06 23:17:06,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-06 23:17:06,926 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-06 23:17:06,926 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-06 23:17:06,926 INFO L95 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 [2019-10-06 23:17:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-06 23:17:07,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-06 23:17:07,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-06 23:17:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-06 23:17:07,253 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-06 23:17:07,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-06 23:17:07,556 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-06 23:17:07,558 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-06 23:17:07,558 INFO L169 IcfgInterpreter]: Building call graph [2019-10-06 23:17:07,558 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-06 23:17:07,559 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-06 23:17:07,559 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-06 23:17:07,591 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-06 23:17:07,841 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-06 23:17:07,856 INFO L199 IcfgInterpreter]: Interpreting procedure is_relaxed_prefix with input of size 10 for LOIs [2019-10-06 23:17:07,877 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-06 23:17:07,881 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-06 23:17:07,882 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-06 23:17:07,882 INFO L193 IcfgInterpreter]: Reachable states at location L1123-3 satisfy 68#true [2019-10-06 23:17:07,882 INFO L193 IcfgInterpreter]: Reachable states at location L1092 satisfy 185#(and (= |is_relaxed_prefix_#in~pat.offset| is_relaxed_prefix_~pat.offset) (= is_relaxed_prefix_~pat.base |is_relaxed_prefix_#in~pat.base|) (exists ((v_main_~j~1_BEFORE_CALL_8 Int)) (and (<= 0 v_main_~j~1_BEFORE_CALL_8) (<= (mod |is_relaxed_prefix_#in~a_length| 4294967296) (mod v_main_~j~1_BEFORE_CALL_8 4294967296)))) (= |is_relaxed_prefix_#in~a.offset| is_relaxed_prefix_~a.offset) (= |is_relaxed_prefix_#in~a_length| is_relaxed_prefix_~a_length) (= |is_relaxed_prefix_#in~a.base| is_relaxed_prefix_~a.base) (= |is_relaxed_prefix_#in~pat_length| is_relaxed_prefix_~pat_length)) [2019-10-06 23:17:07,882 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 176#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-06 23:17:07,883 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 216#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-06 23:17:07,883 INFO L193 IcfgInterpreter]: Reachable states at location is_relaxed_prefixEXIT satisfy 212#(and (<= is_relaxed_prefix_~shift~0 0) (<= 0 is_relaxed_prefix_~i~0) (<= |is_relaxed_prefix_#res| 1) (<= 0 is_relaxed_prefix_~shift~0) (= is_relaxed_prefix_~shift~0 0) (= is_relaxed_prefix_~i~0 0) (<= is_relaxed_prefix_~i~0 0) (<= 1 |is_relaxed_prefix_#res|)) [2019-10-06 23:17:07,883 INFO L193 IcfgInterpreter]: Reachable states at location is_relaxed_prefixENTRY satisfy 180#(exists ((v_main_~j~1_BEFORE_CALL_8 Int)) (and (<= 0 v_main_~j~1_BEFORE_CALL_8) (<= (mod |is_relaxed_prefix_#in~a_length| 4294967296) (mod v_main_~j~1_BEFORE_CALL_8 4294967296)))) [2019-10-06 23:17:07,883 INFO L193 IcfgInterpreter]: Reachable states at location L1097-3 satisfy 190#(and (<= 0 is_relaxed_prefix_~i~0) (= is_relaxed_prefix_~pat.base |is_relaxed_prefix_#in~pat.base|) (exists ((v_main_~j~1_BEFORE_CALL_8 Int)) (and (<= 0 v_main_~j~1_BEFORE_CALL_8) (<= (mod |is_relaxed_prefix_#in~a_length| 4294967296) (mod v_main_~j~1_BEFORE_CALL_8 4294967296)))) (= 0 is_relaxed_prefix_~shift~0) (= 0 is_relaxed_prefix_~i~0) (= |is_relaxed_prefix_#in~a.base| is_relaxed_prefix_~a.base) (= |is_relaxed_prefix_#in~pat_length| is_relaxed_prefix_~pat_length) (= |is_relaxed_prefix_#in~pat.offset| is_relaxed_prefix_~pat.offset) (<= is_relaxed_prefix_~shift~0 0) (<= 0 is_relaxed_prefix_~shift~0) (not (< (mod (+ is_relaxed_prefix_~a_length 1) 4294967296) (mod is_relaxed_prefix_~pat_length 4294967296))) (<= is_relaxed_prefix_~i~0 0) (= |is_relaxed_prefix_#in~a.offset| is_relaxed_prefix_~a.offset) (= |is_relaxed_prefix_#in~a_length| is_relaxed_prefix_~a_length)) [2019-10-06 23:17:07,884 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-06 23:17:07,884 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-06 23:17:07,884 INFO L193 IcfgInterpreter]: Reachable states at location is_relaxed_prefixFINAL satisfy 201#(and (<= is_relaxed_prefix_~shift~0 0) (<= 0 is_relaxed_prefix_~i~0) (<= |is_relaxed_prefix_#res| 1) (<= 0 is_relaxed_prefix_~shift~0) (= is_relaxed_prefix_~shift~0 0) (= is_relaxed_prefix_~i~0 0) (<= is_relaxed_prefix_~i~0 0) (<= 1 |is_relaxed_prefix_#res|)) [2019-10-06 23:17:07,884 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 221#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-06 23:17:07,884 INFO L193 IcfgInterpreter]: Reachable states at location L7 satisfy 166#(and (or (and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) (and (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1))) (or (and (= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)))) [2019-10-06 23:17:07,885 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-06 23:17:07,885 INFO L193 IcfgInterpreter]: Reachable states at location L1126-3 satisfy 106#(<= 0 main_~j~1) [2019-10-06 23:17:07,885 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 161#(and (or (and (<= 1 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) (and (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0))) (or (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| 0))) [2019-10-06 23:17:07,885 INFO L193 IcfgInterpreter]: Reachable states at location L1133 satisfy 156#(and (not (< (mod main_~j~1 4294967296) (mod main_~a_len~0 4294967296))) (<= 0 main_~j~1)) [2019-10-06 23:17:07,886 INFO L193 IcfgInterpreter]: Reachable states at location L1126-4 satisfy 111#(and (not (< (mod main_~j~1 4294967296) (mod main_~a_len~0 4294967296))) (<= 0 main_~j~1)) [2019-10-06 23:17:07,886 INFO L193 IcfgInterpreter]: Reachable states at location L8 satisfy 171#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-06 23:17:07,886 INFO L193 IcfgInterpreter]: Reachable states at location L1131 satisfy 137#(and (not (< (mod main_~j~1 4294967296) (mod main_~a_len~0 4294967296))) (<= 1 |main_#t~ret14|) (<= 0 main_~j~1) (<= |main_#t~ret14| 1)) [2019-10-06 23:17:08,874 INFO L211 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-06 23:17:08,874 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9, 14] total 36 [2019-10-06 23:17:08,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-06 23:17:08,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-06 23:17:08,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2019-10-06 23:17:08,877 INFO L87 Difference]: Start difference. First operand 61 states and 85 transitions. Second operand 36 states. [2019-10-06 23:17:10,112 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2019-10-06 23:17:10,283 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2019-10-06 23:17:11,067 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2019-10-06 23:17:13,587 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2019-10-06 23:17:14,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-06 23:17:14,370 INFO L93 Difference]: Finished difference Result 156 states and 235 transitions. [2019-10-06 23:17:14,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-06 23:17:14,370 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 21 [2019-10-06 23:17:14,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-06 23:17:14,372 INFO L225 Difference]: With dead ends: 156 [2019-10-06 23:17:14,373 INFO L226 Difference]: Without dead ends: 125 [2019-10-06 23:17:14,375 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=561, Invalid=4409, Unknown=0, NotChecked=0, Total=4970 [2019-10-06 23:17:14,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-10-06 23:17:14,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 54. [2019-10-06 23:17:14,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-06 23:17:14,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2019-10-06 23:17:14,388 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 21 [2019-10-06 23:17:14,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-06 23:17:14,388 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2019-10-06 23:17:14,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-06 23:17:14,389 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2019-10-06 23:17:14,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-06 23:17:14,390 INFO L377 BasicCegarLoop]: Found error trace [2019-10-06 23:17:14,390 INFO L385 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, 1] [2019-10-06 23:17:14,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-06 23:17:14,594 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-06 23:17:14,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-06 23:17:14,595 INFO L82 PathProgramCache]: Analyzing trace with hash -820718679, now seen corresponding path program 1 times [2019-10-06 23:17:14,595 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-06 23:17:14,595 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-06 23:17:14,595 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-06 23:17:14,595 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-06 23:17:14,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-06 23:17:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-06 23:17:14,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-06 23:17:14,827 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-06 23:17:14,827 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-06 23:17:14,827 INFO L95 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 [2019-10-06 23:17:14,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-06 23:17:14,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-06 23:17:14,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-06 23:17:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-06 23:17:15,114 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-06 23:17:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-06 23:17:19,897 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-06 23:17:19,899 INFO L162 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-10-06 23:17:19,899 INFO L169 IcfgInterpreter]: Building call graph [2019-10-06 23:17:19,900 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-06 23:17:19,900 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-06 23:17:19,900 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-06 23:17:19,923 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-06 23:17:20,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-06 23:17:20,270 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:133) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:287) ... 21 more [2019-10-06 23:17:20,276 INFO L168 Benchmark]: Toolchain (without parser) took 24630.74 ms. Allocated memory was 142.1 MB in the beginning and 331.9 MB in the end (delta: 189.8 MB). Free memory was 104.6 MB in the beginning and 150.0 MB in the end (delta: -45.3 MB). Peak memory consumption was 144.5 MB. Max. memory is 7.1 GB. [2019-10-06 23:17:20,276 INFO L168 Benchmark]: CDTParser took 1.21 ms. Allocated memory is still 142.1 MB. Free memory was 124.1 MB in the beginning and 123.9 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-10-06 23:17:20,277 INFO L168 Benchmark]: CACSL2BoogieTranslator took 596.02 ms. Allocated memory was 142.1 MB in the beginning and 205.5 MB in the end (delta: 63.4 MB). Free memory was 104.4 MB in the beginning and 171.2 MB in the end (delta: -66.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2019-10-06 23:17:20,278 INFO L168 Benchmark]: Boogie Preprocessor took 63.55 ms. Allocated memory is still 205.5 MB. Free memory was 171.2 MB in the beginning and 168.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2019-10-06 23:17:20,279 INFO L168 Benchmark]: RCFGBuilder took 810.62 ms. Allocated memory is still 205.5 MB. Free memory was 168.1 MB in the beginning and 110.0 MB in the end (delta: 58.0 MB). Peak memory consumption was 58.0 MB. Max. memory is 7.1 GB. [2019-10-06 23:17:20,279 INFO L168 Benchmark]: TraceAbstraction took 23156.01 ms. Allocated memory was 205.5 MB in the beginning and 331.9 MB in the end (delta: 126.4 MB). Free memory was 110.0 MB in the beginning and 150.0 MB in the end (delta: -39.9 MB). Peak memory consumption was 86.4 MB. Max. memory is 7.1 GB. [2019-10-06 23:17:20,282 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.21 ms. Allocated memory is still 142.1 MB. Free memory was 124.1 MB in the beginning and 123.9 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 596.02 ms. Allocated memory was 142.1 MB in the beginning and 205.5 MB in the end (delta: 63.4 MB). Free memory was 104.4 MB in the beginning and 171.2 MB in the end (delta: -66.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 63.55 ms. Allocated memory is still 205.5 MB. Free memory was 171.2 MB in the beginning and 168.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 810.62 ms. Allocated memory is still 205.5 MB. Free memory was 168.1 MB in the beginning and 110.0 MB in the end (delta: 58.0 MB). Peak memory consumption was 58.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23156.01 ms. Allocated memory was 205.5 MB in the beginning and 331.9 MB in the end (delta: 126.4 MB). Free memory was 110.0 MB in the beginning and 150.0 MB in the end (delta: -39.9 MB). Peak memory consumption was 86.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...