/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 05:48:41,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 05:48:41,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 05:48:41,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 05:48:41,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 05:48:41,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 05:48:41,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 05:48:41,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 05:48:41,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 05:48:41,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 05:48:41,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 05:48:41,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 05:48:41,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 05:48:41,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 05:48:41,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 05:48:41,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 05:48:41,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 05:48:41,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 05:48:41,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 05:48:41,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 05:48:41,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 05:48:41,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 05:48:41,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 05:48:41,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 05:48:41,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 05:48:41,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 05:48:41,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 05:48:41,403 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 05:48:41,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 05:48:41,404 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 05:48:41,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 05:48:41,406 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 05:48:41,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 05:48:41,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 05:48:41,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 05:48:41,409 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 05:48:41,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 05:48:41,411 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 05:48:41,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 05:48:41,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 05:48:41,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 05:48:41,415 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 [2020-07-20 05:48:41,453 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 05:48:41,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 05:48:41,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 05:48:41,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 05:48:41,455 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 05:48:41,456 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 05:48:41,456 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 05:48:41,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 05:48:41,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 05:48:41,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 05:48:41,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 05:48:41,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 05:48:41,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 05:48:41,460 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 05:48:41,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 05:48:41,461 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 05:48:41,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 05:48:41,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 05:48:41,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 05:48:41,463 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 05:48:41,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 05:48:41,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 05:48:41,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 05:48:41,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 05:48:41,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 05:48:41,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 05:48:41,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 05:48:41,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 05:48:41,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 05:48:41,465 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 05:48:41,784 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 05:48:41,798 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 05:48:41,801 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 05:48:41,803 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 05:48:41,804 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 05:48:41,804 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-07-20 05:48:41,890 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cb0017c7/18304b822db7400daa15a7bf23bb4c26/FLAG5789f81da [2020-07-20 05:48:42,425 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 05:48:42,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-07-20 05:48:42,442 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cb0017c7/18304b822db7400daa15a7bf23bb4c26/FLAG5789f81da [2020-07-20 05:48:42,750 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cb0017c7/18304b822db7400daa15a7bf23bb4c26 [2020-07-20 05:48:42,759 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 05:48:42,762 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 05:48:42,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 05:48:42,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 05:48:42,767 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 05:48:42,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:48:42" (1/1) ... [2020-07-20 05:48:42,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61675e29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:48:42, skipping insertion in model container [2020-07-20 05:48:42,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:48:42" (1/1) ... [2020-07-20 05:48:42,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 05:48:42,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 05:48:43,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:48:43,259 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 05:48:43,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:48:43,370 INFO L208 MainTranslator]: Completed translation [2020-07-20 05:48:43,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:48:43 WrapperNode [2020-07-20 05:48:43,370 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 05:48:43,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 05:48:43,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 05:48:43,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 05:48:43,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:48:43" (1/1) ... [2020-07-20 05:48:43,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:48:43" (1/1) ... [2020-07-20 05:48:43,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:48:43" (1/1) ... [2020-07-20 05:48:43,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:48:43" (1/1) ... [2020-07-20 05:48:43,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:48:43" (1/1) ... [2020-07-20 05:48:43,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:48:43" (1/1) ... [2020-07-20 05:48:43,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:48:43" (1/1) ... [2020-07-20 05:48:43,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 05:48:43,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 05:48:43,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 05:48:43,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 05:48:43,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:48:43" (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 [2020-07-20 05:48:43,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 05:48:43,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 05:48:43,500 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 05:48:43,500 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 05:48:43,500 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-20 05:48:43,500 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-07-20 05:48:43,500 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-07-20 05:48:43,501 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-07-20 05:48:43,501 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 05:48:43,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 05:48:43,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 05:48:43,503 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 05:48:43,503 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 05:48:43,503 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 05:48:43,503 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 05:48:43,504 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 05:48:43,505 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 05:48:43,505 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 05:48:43,505 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 05:48:43,505 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 05:48:43,506 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 05:48:43,506 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 05:48:43,507 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 05:48:43,507 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 05:48:43,508 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 05:48:43,509 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 05:48:43,509 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 05:48:43,509 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 05:48:43,509 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 05:48:43,509 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 05:48:43,509 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 05:48:43,509 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 05:48:43,509 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 05:48:43,510 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 05:48:43,510 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 05:48:43,510 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 05:48:43,510 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 05:48:43,510 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 05:48:43,510 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 05:48:43,510 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 05:48:43,511 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 05:48:43,511 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 05:48:43,511 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 05:48:43,511 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 05:48:43,511 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 05:48:43,511 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 05:48:43,511 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 05:48:43,511 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 05:48:43,512 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 05:48:43,512 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 05:48:43,512 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 05:48:43,512 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 05:48:43,512 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 05:48:43,512 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 05:48:43,512 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 05:48:43,513 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 05:48:43,513 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 05:48:43,513 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 05:48:43,513 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 05:48:43,514 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 05:48:43,515 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 05:48:43,515 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 05:48:43,515 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 05:48:43,515 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 05:48:43,515 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 05:48:43,516 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 05:48:43,516 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 05:48:43,517 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 05:48:43,517 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 05:48:43,517 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 05:48:43,517 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 05:48:43,517 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 05:48:43,518 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 05:48:43,518 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 05:48:43,518 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 05:48:43,518 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 05:48:43,519 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 05:48:43,519 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 05:48:43,519 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 05:48:43,520 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 05:48:43,520 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 05:48:43,521 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 05:48:43,521 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 05:48:43,522 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 05:48:43,522 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 05:48:43,522 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 05:48:43,522 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 05:48:43,522 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 05:48:43,522 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 05:48:43,522 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 05:48:43,523 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 05:48:43,523 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 05:48:43,523 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 05:48:43,523 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 05:48:43,523 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 05:48:43,523 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 05:48:43,523 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 05:48:43,523 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 05:48:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 05:48:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 05:48:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 05:48:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 05:48:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 05:48:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 05:48:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 05:48:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 05:48:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 05:48:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 05:48:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 05:48:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 05:48:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 05:48:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 05:48:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 05:48:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 05:48:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 05:48:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 05:48:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-20 05:48:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-07-20 05:48:43,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 05:48:43,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 05:48:43,526 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-07-20 05:48:43,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 05:48:43,526 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-07-20 05:48:43,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 05:48:43,527 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 05:48:43,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 05:48:43,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 05:48:43,835 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-20 05:48:44,066 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 05:48:44,067 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-20 05:48:44,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:48:44 BoogieIcfgContainer [2020-07-20 05:48:44,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 05:48:44,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 05:48:44,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 05:48:44,076 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 05:48:44,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:48:42" (1/3) ... [2020-07-20 05:48:44,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12e62a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:48:44, skipping insertion in model container [2020-07-20 05:48:44,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:48:43" (2/3) ... [2020-07-20 05:48:44,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12e62a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:48:44, skipping insertion in model container [2020-07-20 05:48:44,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:48:44" (3/3) ... [2020-07-20 05:48:44,080 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-07-20 05:48:44,091 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 05:48:44,098 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 05:48:44,113 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 05:48:44,138 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 05:48:44,139 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 05:48:44,139 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 05:48:44,139 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 05:48:44,140 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 05:48:44,140 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 05:48:44,140 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 05:48:44,140 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 05:48:44,158 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-07-20 05:48:44,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 05:48:44,165 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:48:44,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:48:44,166 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:48:44,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:48:44,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1666427650, now seen corresponding path program 1 times [2020-07-20 05:48:44,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:48:44,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384936751] [2020-07-20 05:48:44,179 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49a6dc97 [2020-07-20 05:48:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:48:44,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384936751] [2020-07-20 05:48:44,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:48:44,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 05:48:44,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389316952] [2020-07-20 05:48:44,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 05:48:44,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:48:44,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 05:48:44,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 05:48:44,428 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 4 states. [2020-07-20 05:48:44,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:48:44,639 INFO L93 Difference]: Finished difference Result 90 states and 120 transitions. [2020-07-20 05:48:44,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:48:44,641 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-07-20 05:48:44,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:48:44,651 INFO L225 Difference]: With dead ends: 90 [2020-07-20 05:48:44,652 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 05:48:44,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 05:48:44,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 05:48:44,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-07-20 05:48:44,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 05:48:44,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-20 05:48:44,705 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-07-20 05:48:44,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:48:44,706 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-20 05:48:44,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 05:48:44,706 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-20 05:48:44,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 05:48:44,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:48:44,709 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:48:44,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 05:48:44,710 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:48:44,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:48:44,710 INFO L82 PathProgramCache]: Analyzing trace with hash -29727073, now seen corresponding path program 1 times [2020-07-20 05:48:44,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:48:44,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010294524] [2020-07-20 05:48:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49a6dc97 [2020-07-20 05:48:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:48:44,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010294524] [2020-07-20 05:48:44,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:48:44,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 05:48:44,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720186441] [2020-07-20 05:48:44,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 05:48:44,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:48:44,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 05:48:44,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 05:48:44,872 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-07-20 05:48:45,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:48:45,078 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-07-20 05:48:45,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 05:48:45,079 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-07-20 05:48:45,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:48:45,080 INFO L225 Difference]: With dead ends: 45 [2020-07-20 05:48:45,080 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 05:48:45,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 05:48:45,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 05:48:45,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-07-20 05:48:45,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 05:48:45,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-20 05:48:45,090 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2020-07-20 05:48:45,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:48:45,090 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-20 05:48:45,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 05:48:45,090 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-20 05:48:45,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 05:48:45,092 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:48:45,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:48:45,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 05:48:45,092 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:48:45,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:48:45,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1680455870, now seen corresponding path program 1 times [2020-07-20 05:48:45,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:48:45,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435487873] [2020-07-20 05:48:45,093 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49a6dc97 [2020-07-20 05:48:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:48:45,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435487873] [2020-07-20 05:48:45,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021502655] [2020-07-20 05:48:45,253 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@44eeed3f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:48:45,372 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@44eeed3f issued 2 check-sat command(s) [2020-07-20 05:48:45,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:48:45,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 05:48:45,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:48:45,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:48:45,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 05:48:45,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2020-07-20 05:48:45,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975454992] [2020-07-20 05:48:45,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 05:48:45,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:48:45,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 05:48:45,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-07-20 05:48:45,530 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2020-07-20 05:48:45,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:48:45,642 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-07-20 05:48:45,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 05:48:45,644 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-20 05:48:45,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:48:45,645 INFO L225 Difference]: With dead ends: 39 [2020-07-20 05:48:45,646 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 05:48:45,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-07-20 05:48:45,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 05:48:45,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 05:48:45,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 05:48:45,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-20 05:48:45,666 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 28 [2020-07-20 05:48:45,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:48:45,667 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-20 05:48:45,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 05:48:45,668 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-20 05:48:45,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 05:48:45,669 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:48:45,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:48:45,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 05:48:45,883 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:48:45,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:48:45,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1808388506, now seen corresponding path program 1 times [2020-07-20 05:48:45,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:48:45,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205104321] [2020-07-20 05:48:45,884 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49a6dc97 [2020-07-20 05:48:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 05:48:46,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205104321] [2020-07-20 05:48:46,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139074676] [2020-07-20 05:48:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@553c8598 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 [2020-07-20 05:48:46,173 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@553c8598 issued 3 check-sat command(s) [2020-07-20 05:48:46,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:48:46,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 05:48:46,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:48:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 05:48:46,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:48:46,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2020-07-20 05:48:46,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410234615] [2020-07-20 05:48:46,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 05:48:46,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:48:46,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 05:48:46,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-20 05:48:46,206 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 9 states. [2020-07-20 05:48:46,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:48:46,365 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-07-20 05:48:46,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 05:48:46,366 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-20 05:48:46,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:48:46,367 INFO L225 Difference]: With dead ends: 50 [2020-07-20 05:48:46,367 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 05:48:46,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-07-20 05:48:46,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 05:48:46,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-07-20 05:48:46,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 05:48:46,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-20 05:48:46,375 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2020-07-20 05:48:46,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:48:46,375 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-20 05:48:46,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 05:48:46,375 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-20 05:48:46,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 05:48:46,376 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:48:46,377 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:48:46,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:48:46,590 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:48:46,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:48:46,590 INFO L82 PathProgramCache]: Analyzing trace with hash 560900285, now seen corresponding path program 2 times [2020-07-20 05:48:46,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:48:46,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306863784] [2020-07-20 05:48:46,591 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49a6dc97 [2020-07-20 05:48:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 05:48:46,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306863784] [2020-07-20 05:48:46,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701569200] [2020-07-20 05:48:46,701 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a74107b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:48:46,806 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a74107b issued 3 check-sat command(s) [2020-07-20 05:48:46,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:48:46,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-20 05:48:46,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:48:46,935 INFO L384 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 [2020-07-20 05:48:46,935 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:48:46,949 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:48:46,950 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:48:46,951 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2020-07-20 05:48:47,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:48:47,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:48:47,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2020-07-20 05:48:47,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229085436] [2020-07-20 05:48:47,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 05:48:47,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:48:47,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 05:48:47,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-07-20 05:48:47,206 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 21 states. [2020-07-20 05:48:56,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:48:56,174 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-07-20 05:48:56,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 05:48:56,174 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2020-07-20 05:48:56,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:48:56,175 INFO L225 Difference]: With dead ends: 57 [2020-07-20 05:48:56,175 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 05:48:56,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 05:48:56,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 05:48:56,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-07-20 05:48:56,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 05:48:56,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-07-20 05:48:56,192 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 32 [2020-07-20 05:48:56,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:48:56,193 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-07-20 05:48:56,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 05:48:56,195 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-07-20 05:48:56,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 05:48:56,196 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:48:56,196 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:48:56,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:48:56,412 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:48:56,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:48:56,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1265881822, now seen corresponding path program 3 times [2020-07-20 05:48:56,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:48:56,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375788401] [2020-07-20 05:48:56,413 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49a6dc97 [2020-07-20 05:48:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 05:48:56,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375788401] [2020-07-20 05:48:56,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455170103] [2020-07-20 05:48:56,577 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1439a9fc 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 [2020-07-20 05:48:56,718 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1439a9fc issued 3 check-sat command(s) [2020-07-20 05:48:56,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:48:56,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 55 conjunts are in the unsatisfiable core [2020-07-20 05:48:56,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:48:56,766 INFO L384 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 [2020-07-20 05:48:56,767 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:48:56,774 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:48:56,774 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:48:56,775 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:13 [2020-07-20 05:48:56,806 INFO L384 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 [2020-07-20 05:48:56,806 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:48:56,815 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:48:56,816 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:48:56,816 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-07-20 05:48:56,857 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:48:56,858 INFO L384 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 [2020-07-20 05:48:56,859 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:48:56,865 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:48:56,866 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:48:56,866 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:16 [2020-07-20 05:48:56,897 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.offset_9|], 2=[|v_#memory_$Pointer$.base_11|]} [2020-07-20 05:48:56,901 INFO L384 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 [2020-07-20 05:48:56,902 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:48:56,912 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:48:56,917 INFO L384 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 20 treesize of output 19 [2020-07-20 05:48:56,918 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 05:48:56,927 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:48:56,928 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:48:56,928 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:35, output treesize:28 [2020-07-20 05:48:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:48:57,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:48:57,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2020-07-20 05:48:57,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891615891] [2020-07-20 05:48:57,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 05:48:57,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:48:57,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 05:48:57,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2020-07-20 05:48:57,381 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 24 states. [2020-07-20 05:48:58,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:48:58,739 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-07-20 05:48:58,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 05:48:58,740 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 36 [2020-07-20 05:48:58,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:48:58,741 INFO L225 Difference]: With dead ends: 57 [2020-07-20 05:48:58,741 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 05:48:58,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 05:48:58,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 05:48:58,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2020-07-20 05:48:58,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 05:48:58,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-07-20 05:48:58,760 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 36 [2020-07-20 05:48:58,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:48:58,761 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-07-20 05:48:58,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 05:48:58,761 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-07-20 05:48:58,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 05:48:58,762 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:48:58,762 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:48:58,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:48:58,967 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:48:58,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:48:58,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1775282106, now seen corresponding path program 4 times [2020-07-20 05:48:58,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:48:58,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718887706] [2020-07-20 05:48:58,969 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49a6dc97 [2020-07-20 05:48:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 05:48:59,006 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 05:48:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 05:48:59,045 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 05:48:59,082 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 05:48:59,082 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 05:48:59,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 05:48:59,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:48:59 BoogieIcfgContainer [2020-07-20 05:48:59,158 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 05:48:59,160 INFO L168 Benchmark]: Toolchain (without parser) took 16398.97 ms. Allocated memory was 147.3 MB in the beginning and 296.2 MB in the end (delta: 148.9 MB). Free memory was 102.2 MB in the beginning and 216.6 MB in the end (delta: -114.4 MB). Peak memory consumption was 34.5 MB. Max. memory is 7.1 GB. [2020-07-20 05:48:59,161 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 147.3 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 05:48:59,162 INFO L168 Benchmark]: CACSL2BoogieTranslator took 607.43 ms. Allocated memory was 147.3 MB in the beginning and 205.0 MB in the end (delta: 57.7 MB). Free memory was 101.9 MB in the beginning and 171.9 MB in the end (delta: -69.9 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. [2020-07-20 05:48:59,165 INFO L168 Benchmark]: Boogie Preprocessor took 58.26 ms. Allocated memory is still 205.0 MB. Free memory was 171.9 MB in the beginning and 168.4 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 7.1 GB. [2020-07-20 05:48:59,166 INFO L168 Benchmark]: RCFGBuilder took 641.44 ms. Allocated memory is still 205.0 MB. Free memory was 168.4 MB in the beginning and 125.4 MB in the end (delta: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 7.1 GB. [2020-07-20 05:48:59,172 INFO L168 Benchmark]: TraceAbstraction took 15085.35 ms. Allocated memory was 205.0 MB in the beginning and 296.2 MB in the end (delta: 91.2 MB). Free memory was 124.8 MB in the beginning and 216.6 MB in the end (delta: -91.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 05:48:59,183 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 147.3 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 607.43 ms. Allocated memory was 147.3 MB in the beginning and 205.0 MB in the end (delta: 57.7 MB). Free memory was 101.9 MB in the beginning and 171.9 MB in the end (delta: -69.9 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 58.26 ms. Allocated memory is still 205.0 MB. Free memory was 171.9 MB in the beginning and 168.4 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 641.44 ms. Allocated memory is still 205.0 MB. Free memory was 168.4 MB in the beginning and 125.4 MB in the end (delta: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15085.35 ms. Allocated memory was 205.0 MB in the beginning and 296.2 MB in the end (delta: 91.2 MB). Free memory was 124.8 MB in the beginning and 216.6 MB in the end (delta: -91.8 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L592] int len = 2; VAL [len=2] [L593] len < 32 && __VERIFIER_nondet_int() [L593] len < 32 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, len=2, len < 32 && __VERIFIER_nondet_int()=0] [L593] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L596] CALL, EXPR sll_create(len + 1) VAL [\old(len)=3] [L564] SLL head = ((void *)0); VAL [\old(len)=3, head={0:0}, len=3] [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={0:0}, len=3, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={0:0}, len=3, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L570] new_head->next = head [L571] head = new_head [L572] len-- VAL [\old(len)=3, head={-1:0}, len=2, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={-1:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={-1:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L570] new_head->next = head [L571] head = new_head [L572] len-- VAL [\old(len)=3, head={-2:0}, len=1, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={-2:0}, len=1, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={-2:0}, len=1, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L570] new_head->next = head [L571] head = new_head [L572] len-- VAL [\old(len)=3, head={-3:0}, len=0, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L565] COND FALSE !(len > 0) VAL [\old(len)=3, head={-3:0}, len=0, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L574] return head; VAL [\old(len)=3, \result={-3:0}, head={-3:0}, len=0, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L596] RET, EXPR sll_create(len + 1) VAL [len=2, sll_create(len + 1)={-3:0}] [L596] SLL s = sll_create(len + 1); [L597] CALL, EXPR sll_length(s) VAL [head={-3:0}] [L577] int len = 0; VAL [head={-3:0}, head={-3:0}, len=0] [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND FALSE !(\read(head)) VAL [head={-3:0}, head={0:0}, len=3] [L582] return len; VAL [\result=3, head={-3:0}, head={0:0}, len=3] [L597] RET, EXPR sll_length(s) VAL [len=2, s={-3:0}, sll_length(s)=3] [L597] COND TRUE len != sll_length(s) [L602] __VERIFIER_error() VAL [len=2, s={-3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.9s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 11.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 151 SDtfs, 306 SDslu, 587 SDs, 0 SdLazy, 1294 SolverSat, 122 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 9.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 241 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 30 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 335 NumberOfCodeBlocks, 299 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 288 ConstructedInterpolants, 13 QuantifiedInterpolants, 42991 SizeOfPredicates, 34 NumberOfNonLiveVariables, 464 ConjunctsInSsa, 117 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 22/48 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...