/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:31:55,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:31:55,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:31:55,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:31:55,233 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:31:55,235 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:31:55,237 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:31:55,252 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:31:55,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:31:55,256 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:31:55,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:31:55,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:31:55,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:31:55,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:31:55,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:31:55,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:31:55,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:31:55,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:31:55,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:31:55,279 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:31:55,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:31:55,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:31:55,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:31:55,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:31:55,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:31:55,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:31:55,295 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:31:55,298 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:31:55,299 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:31:55,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 11:31:55,300 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 11:31:55,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 11:31:55,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 11:31:55,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 11:31:55,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 11:31:55,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 11:31:55,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 11:31:55,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 11:31:55,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:31:55,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:31:55,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:31:55,310 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 11:31:55,332 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:31:55,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:31:55,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:31:55,336 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:31:55,336 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:31:55,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:31:55,336 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:31:55,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:31:55,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:31:55,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:31:55,338 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:31:55,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:31:55,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:31:55,339 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:31:55,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:31:55,340 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:31:55,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:31:55,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:31:55,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:31:55,341 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:31:55,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:31:55,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:31:55,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:31:55,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:31:55,342 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:31:55,342 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:31:55,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:55,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:31:55,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:31:55,343 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:31:55,686 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:31:55,701 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:31:55,705 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:31:55,706 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:31:55,707 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:31:55,708 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-07-20 11:31:55,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e49b5fca/34cb468815ea480e9c90efa8811527c3/FLAG83ccab74d [2020-07-20 11:31:56,464 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:31:56,466 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-07-20 11:31:56,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e49b5fca/34cb468815ea480e9c90efa8811527c3/FLAG83ccab74d [2020-07-20 11:31:56,681 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e49b5fca/34cb468815ea480e9c90efa8811527c3 [2020-07-20 11:31:56,691 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:31:56,693 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:31:56,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:31:56,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:31:56,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:31:56,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:31:56" (1/1) ... [2020-07-20 11:31:56,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11c715ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:56, skipping insertion in model container [2020-07-20 11:31:56,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:31:56" (1/1) ... [2020-07-20 11:31:56,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:31:56,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:31:57,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:31:57,343 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:31:57,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:31:57,490 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:31:57,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:57 WrapperNode [2020-07-20 11:31:57,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:31:57,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:31:57,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:31:57,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:31:57,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:57" (1/1) ... [2020-07-20 11:31:57,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:57" (1/1) ... [2020-07-20 11:31:57,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:57" (1/1) ... [2020-07-20 11:31:57,530 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:57" (1/1) ... [2020-07-20 11:31:57,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:57" (1/1) ... [2020-07-20 11:31:57,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:57" (1/1) ... [2020-07-20 11:31:57,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:57" (1/1) ... [2020-07-20 11:31:57,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:31:57,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:31:57,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:31:57,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:31:57,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:57" (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 11:31:57,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:31:57,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:31:57,656 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 11:31:57,656 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 11:31:57,656 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-20 11:31:57,657 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-07-20 11:31:57,657 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:31:57,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:31:57,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:31:57,659 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 11:31:57,659 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 11:31:57,659 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 11:31:57,660 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 11:31:57,660 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 11:31:57,660 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 11:31:57,661 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 11:31:57,661 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 11:31:57,662 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 11:31:57,662 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 11:31:57,662 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 11:31:57,662 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 11:31:57,662 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 11:31:57,663 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 11:31:57,663 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 11:31:57,663 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 11:31:57,664 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 11:31:57,664 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 11:31:57,664 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 11:31:57,664 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 11:31:57,665 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 11:31:57,665 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 11:31:57,665 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 11:31:57,665 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 11:31:57,665 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 11:31:57,666 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 11:31:57,666 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 11:31:57,666 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 11:31:57,666 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 11:31:57,666 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 11:31:57,666 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 11:31:57,667 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 11:31:57,667 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 11:31:57,667 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 11:31:57,667 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 11:31:57,667 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 11:31:57,667 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 11:31:57,668 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 11:31:57,668 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 11:31:57,668 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 11:31:57,668 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 11:31:57,668 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 11:31:57,668 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 11:31:57,669 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 11:31:57,669 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 11:31:57,669 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 11:31:57,669 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 11:31:57,669 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 11:31:57,669 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 11:31:57,670 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 11:31:57,670 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 11:31:57,670 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 11:31:57,670 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:31:57,671 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 11:31:57,671 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 11:31:57,671 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 11:31:57,671 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 11:31:57,671 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 11:31:57,672 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 11:31:57,673 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 11:31:57,673 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 11:31:57,673 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:31:57,673 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 11:31:57,674 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 11:31:57,674 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 11:31:57,674 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 11:31:57,674 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 11:31:57,675 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 11:31:57,675 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 11:31:57,675 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 11:31:57,676 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 11:31:57,676 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 11:31:57,676 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 11:31:57,676 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 11:31:57,677 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 11:31:57,677 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 11:31:57,677 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 11:31:57,677 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 11:31:57,678 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 11:31:57,679 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 11:31:57,679 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 11:31:57,679 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 11:31:57,679 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 11:31:57,679 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 11:31:57,679 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 11:31:57,679 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 11:31:57,680 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 11:31:57,680 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 11:31:57,680 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 11:31:57,680 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 11:31:57,680 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 11:31:57,680 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 11:31:57,680 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 11:31:57,681 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 11:31:57,681 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 11:31:57,681 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 11:31:57,681 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 11:31:57,681 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 11:31:57,681 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 11:31:57,681 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 11:31:57,682 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 11:31:57,682 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 11:31:57,682 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 11:31:57,682 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 11:31:57,682 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 11:31:57,682 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-20 11:31:57,683 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-07-20 11:31:57,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:31:57,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:31:57,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 11:31:57,684 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:31:57,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 11:31:57,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:31:57,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:31:57,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:31:57,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:31:58,077 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-20 11:31:58,312 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:31:58,313 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 11:31:58,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:31:58 BoogieIcfgContainer [2020-07-20 11:31:58,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:31:58,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:31:58,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:31:58,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:31:58,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:31:56" (1/3) ... [2020-07-20 11:31:58,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d1e047 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:31:58, skipping insertion in model container [2020-07-20 11:31:58,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:57" (2/3) ... [2020-07-20 11:31:58,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d1e047 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:31:58, skipping insertion in model container [2020-07-20 11:31:58,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:31:58" (3/3) ... [2020-07-20 11:31:58,329 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-07-20 11:31:58,343 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:31:58,354 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:31:58,371 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:31:58,401 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:31:58,401 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:31:58,401 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:31:58,401 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:31:58,401 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:31:58,402 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:31:58,402 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:31:58,402 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:31:58,425 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-07-20 11:31:58,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:31:58,434 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:58,435 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] [2020-07-20 11:31:58,436 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:58,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:58,443 INFO L82 PathProgramCache]: Analyzing trace with hash 248267832, now seen corresponding path program 1 times [2020-07-20 11:31:58,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:58,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910365746] [2020-07-20 11:31:58,454 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:58,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:31:58,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:58,702 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:31:58,739 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 11:31:58,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:58,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910365746] [2020-07-20 11:31:58,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:58,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:31:58,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930022946] [2020-07-20 11:31:58,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:31:58,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:58,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:31:58,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:31:58,772 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-07-20 11:31:58,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:58,839 INFO L93 Difference]: Finished difference Result 66 states and 92 transitions. [2020-07-20 11:31:58,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:31:58,841 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-07-20 11:31:58,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:58,856 INFO L225 Difference]: With dead ends: 66 [2020-07-20 11:31:58,856 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 11:31:58,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 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 11:31:58,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 11:31:58,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-07-20 11:31:58,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 11:31:58,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2020-07-20 11:31:58,918 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 20 [2020-07-20 11:31:58,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:58,919 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2020-07-20 11:31:58,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:31:58,919 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2020-07-20 11:31:58,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:31:58,920 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:58,921 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] [2020-07-20 11:31:59,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:59,135 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:59,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:59,136 INFO L82 PathProgramCache]: Analyzing trace with hash 248265910, now seen corresponding path program 1 times [2020-07-20 11:31:59,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:59,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583363848] [2020-07-20 11:31:59,137 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:59,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:31:59,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:59,349 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 11:31:59,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:59,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583363848] [2020-07-20 11:31:59,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:59,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:31:59,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798286652] [2020-07-20 11:31:59,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:31:59,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:59,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:31:59,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:31:59,359 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 5 states. [2020-07-20 11:31:59,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:59,431 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2020-07-20 11:31:59,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:31:59,432 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-20 11:31:59,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:59,434 INFO L225 Difference]: With dead ends: 62 [2020-07-20 11:31:59,434 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 11:31:59,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:31:59,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 11:31:59,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-07-20 11:31:59,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 11:31:59,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-07-20 11:31:59,453 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 20 [2020-07-20 11:31:59,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:59,453 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-07-20 11:31:59,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:31:59,454 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-07-20 11:31:59,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 11:31:59,455 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:59,456 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] [2020-07-20 11:31:59,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:59,671 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:59,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:59,672 INFO L82 PathProgramCache]: Analyzing trace with hash 215855051, now seen corresponding path program 1 times [2020-07-20 11:31:59,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:59,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868148969] [2020-07-20 11:31:59,674 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:59,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:31:59,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:59,834 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 11:31:59,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:31:59,954 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 11:31:59,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868148969] [2020-07-20 11:31:59,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:31:59,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-20 11:31:59,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557168646] [2020-07-20 11:31:59,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 11:31:59,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:59,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 11:31:59,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:31:59,958 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 9 states. [2020-07-20 11:32:00,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:32:00,030 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2020-07-20 11:32:00,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:32:00,031 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-20 11:32:00,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:32:00,033 INFO L225 Difference]: With dead ends: 69 [2020-07-20 11:32:00,033 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 11:32:00,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:32:00,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 11:32:00,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-07-20 11:32:00,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 11:32:00,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-07-20 11:32:00,044 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 27 [2020-07-20 11:32:00,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:32:00,045 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-07-20 11:32:00,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 11:32:00,045 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-07-20 11:32:00,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 11:32:00,047 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:32:00,047 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:32:00,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:32:00,263 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:32:00,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:32:00,264 INFO L82 PathProgramCache]: Analyzing trace with hash -162690282, now seen corresponding path program 2 times [2020-07-20 11:32:00,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:32:00,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760015207] [2020-07-20 11:32:00,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:32:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:32:00,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:32:00,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:32:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:32:00,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:32:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:32:00,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760015207] [2020-07-20 11:32:00,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:32:00,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-07-20 11:32:00,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895175847] [2020-07-20 11:32:00,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 11:32:00,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:32:00,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 11:32:00,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:32:00,631 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 11 states. [2020-07-20 11:32:00,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:32:00,701 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2020-07-20 11:32:00,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:32:00,702 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-07-20 11:32:00,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:32:00,704 INFO L225 Difference]: With dead ends: 76 [2020-07-20 11:32:00,704 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 11:32:00,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:32:00,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 11:32:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-07-20 11:32:00,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 11:32:00,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2020-07-20 11:32:00,712 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 34 [2020-07-20 11:32:00,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:32:00,713 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2020-07-20 11:32:00,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 11:32:00,713 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2020-07-20 11:32:00,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 11:32:00,715 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:32:00,715 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:32:00,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:32:00,930 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:32:00,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:32:00,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1918465387, now seen corresponding path program 3 times [2020-07-20 11:32:00,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:32:00,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656688559] [2020-07-20 11:32:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:32:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:32:01,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 11:32:01,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:32:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:32:01,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:32:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:32:01,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656688559] [2020-07-20 11:32:01,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:32:01,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-20 11:32:01,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990356857] [2020-07-20 11:32:01,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:32:01,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:32:01,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:32:01,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:32:01,316 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand 13 states. [2020-07-20 11:32:01,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:32:01,426 INFO L93 Difference]: Finished difference Result 83 states and 107 transitions. [2020-07-20 11:32:01,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:32:01,427 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-07-20 11:32:01,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:32:01,428 INFO L225 Difference]: With dead ends: 83 [2020-07-20 11:32:01,429 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 11:32:01,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:32:01,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 11:32:01,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-20 11:32:01,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 11:32:01,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 72 transitions. [2020-07-20 11:32:01,445 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 72 transitions. Word has length 41 [2020-07-20 11:32:01,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:32:01,445 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 72 transitions. [2020-07-20 11:32:01,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:32:01,445 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 72 transitions. [2020-07-20 11:32:01,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 11:32:01,451 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:32:01,451 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:32:01,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:32:01,658 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:32:01,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:32:01,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1263128202, now seen corresponding path program 4 times [2020-07-20 11:32:01,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:32:01,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686253743] [2020-07-20 11:32:01,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:32:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:32:01,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:32:01,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:32:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:32:01,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:32:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:32:02,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686253743] [2020-07-20 11:32:02,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:32:02,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-20 11:32:02,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165392252] [2020-07-20 11:32:02,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:32:02,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:32:02,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:32:02,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:32:02,068 INFO L87 Difference]: Start difference. First operand 57 states and 72 transitions. Second operand 14 states. [2020-07-20 11:32:02,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:32:02,162 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2020-07-20 11:32:02,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:32:02,163 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-07-20 11:32:02,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:32:02,164 INFO L225 Difference]: With dead ends: 90 [2020-07-20 11:32:02,165 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 11:32:02,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:32:02,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 11:32:02,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-07-20 11:32:02,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 11:32:02,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2020-07-20 11:32:02,174 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 48 [2020-07-20 11:32:02,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:32:02,174 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2020-07-20 11:32:02,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:32:02,175 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2020-07-20 11:32:02,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 11:32:02,176 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:32:02,176 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:32:02,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:32:02,390 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:32:02,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:32:02,391 INFO L82 PathProgramCache]: Analyzing trace with hash 645587723, now seen corresponding path program 5 times [2020-07-20 11:32:02,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:32:02,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283622957] [2020-07-20 11:32:02,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:32:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:32:02,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:32:02,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:32:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-20 11:32:02,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:32:02,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283622957] [2020-07-20 11:32:02,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:32:02,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:32:02,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134511032] [2020-07-20 11:32:02,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:32:02,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:32:02,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:32:02,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:32:02,559 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand 3 states. [2020-07-20 11:32:02,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:32:02,581 INFO L93 Difference]: Finished difference Result 118 states and 150 transitions. [2020-07-20 11:32:02,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:32:02,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-07-20 11:32:02,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:32:02,583 INFO L225 Difference]: With dead ends: 118 [2020-07-20 11:32:02,583 INFO L226 Difference]: Without dead ends: 68 [2020-07-20 11:32:02,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:32:02,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-20 11:32:02,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-07-20 11:32:02,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 11:32:02,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-07-20 11:32:02,591 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 55 [2020-07-20 11:32:02,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:32:02,591 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-07-20 11:32:02,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:32:02,591 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-07-20 11:32:02,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 11:32:02,592 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:32:02,592 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:32:02,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:32:02,806 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:32:02,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:32:02,807 INFO L82 PathProgramCache]: Analyzing trace with hash 893734217, now seen corresponding path program 1 times [2020-07-20 11:32:02,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:32:02,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594510492] [2020-07-20 11:32:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:32:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:32:02,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-20 11:32:02,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:32:03,008 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 11:32:03,009 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:32:03,012 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:32:03,012 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:32:03,013 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-20 11:32:03,041 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:32:03,042 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 11:32:03,043 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:32:03,045 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:32:03,045 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:32:03,045 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:4 [2020-07-20 11:32:03,116 INFO L350 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-07-20 11:32:03,117 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 1 case distinctions, treesize of input 16 treesize of output 17 [2020-07-20 11:32:03,118 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:32:03,123 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:32:03,124 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:32:03,125 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:21 [2020-07-20 11:32:03,164 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_93|], 10=[|v_#memory_int_95|]} [2020-07-20 11:32:03,171 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:32:03,186 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:32:03,277 INFO L350 Elim1Store]: treesize reduction 288, result has 10.8 percent of original size [2020-07-20 11:32:03,278 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 41 [2020-07-20 11:32:03,279 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:32:03,298 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:32:03,300 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 11:32:03,301 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:64, output treesize:21 [2020-07-20 11:32:03,328 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-07-20 11:32:03,329 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2020-07-20 11:32:03,332 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:32:03,343 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:32:03,345 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:32:03,345 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:17 [2020-07-20 11:32:03,437 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:32:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-20 11:32:03,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:32:03,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:32:03,705 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 11:32:04,043 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:32:04,048 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:32:04,049 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 11:32:04,049 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:17 [2020-07-20 11:32:05,089 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_93|], 3=[|v_#memory_int_122|]} [2020-07-20 11:32:05,094 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:32:05,109 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:32:05,119 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:32:05,126 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:32:05,127 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-07-20 11:32:05,127 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:63, output treesize:57 [2020-07-20 11:32:05,816 WARN L838 $PredicateComparison]: unable to prove that (forall ((|dll_create_#t~ite4| Int) (v_DerPreprocessor_4 Int) (v_DerPreprocessor_3 Int) (dll_create_~head~0.offset Int) (v_DerPreprocessor_2 Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| c_dll_create_~new_head~0.base (store (store (store (select |c_#memory_int| c_dll_create_~new_head~0.base) (+ c_dll_create_~new_head~0.offset 16) |dll_create_#t~ite4|) (+ c_dll_create_~new_head~0.offset 4) v_DerPreprocessor_3) (+ c_dll_create_~new_head~0.offset 12) v_DerPreprocessor_4)))) (store .cse0 c_dll_create_~head~0.base (store (select .cse0 c_dll_create_~head~0.base) (+ dll_create_~head~0.offset 12) v_DerPreprocessor_2))) c_dll_create_~new_head~0.base) c_dll_create_~new_head~0.offset) 0)) is different from false [2020-07-20 11:32:05,833 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:32:05,954 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 14 [2020-07-20 11:32:05,955 INFO L624 ElimStorePlain]: treesize reduction 1296, result has 1.1 percent of original size [2020-07-20 11:32:05,956 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:32:05,957 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:73, output treesize:4 [2020-07-20 11:32:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 2 not checked. [2020-07-20 11:32:06,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594510492] [2020-07-20 11:32:06,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:32:06,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2020-07-20 11:32:06,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905277471] [2020-07-20 11:32:06,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:32:06,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:32:06,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:32:06,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=330, Unknown=3, NotChecked=36, Total=420 [2020-07-20 11:32:06,038 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 21 states. [2020-07-20 11:32:06,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:32:06,660 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2020-07-20 11:32:06,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:32:06,661 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-07-20 11:32:06,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:32:06,663 INFO L225 Difference]: With dead ends: 83 [2020-07-20 11:32:06,663 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 11:32:06,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=112, Invalid=539, Unknown=3, NotChecked=48, Total=702 [2020-07-20 11:32:06,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 11:32:06,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2020-07-20 11:32:06,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 11:32:06,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2020-07-20 11:32:06,694 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 55 [2020-07-20 11:32:06,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:32:06,694 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2020-07-20 11:32:06,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:32:06,695 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2020-07-20 11:32:06,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 11:32:06,698 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:32:06,698 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:32:06,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:32:06,914 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:32:06,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:32:06,915 INFO L82 PathProgramCache]: Analyzing trace with hash 895583181, now seen corresponding path program 1 times [2020-07-20 11:32:06,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:32:06,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266406366] [2020-07-20 11:32:06,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:32:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:32:57,127 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:33:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:33:28,189 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:33:28,402 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:33:28,402 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:33:28,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:33:28,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:33:28 BoogieIcfgContainer [2020-07-20 11:33:28,656 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:33:28,658 INFO L168 Benchmark]: Toolchain (without parser) took 91965.71 ms. Allocated memory was 141.6 MB in the beginning and 304.6 MB in the end (delta: 163.1 MB). Free memory was 96.9 MB in the beginning and 238.6 MB in the end (delta: -141.7 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. [2020-07-20 11:33:28,659 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 116.4 MB in the beginning and 116.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 11:33:28,660 INFO L168 Benchmark]: CACSL2BoogieTranslator took 796.46 ms. Allocated memory was 141.6 MB in the beginning and 199.8 MB in the end (delta: 58.2 MB). Free memory was 96.5 MB in the beginning and 165.9 MB in the end (delta: -69.5 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:33:28,660 INFO L168 Benchmark]: Boogie Preprocessor took 76.89 ms. Allocated memory is still 199.8 MB. Free memory was 165.9 MB in the beginning and 163.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:33:28,661 INFO L168 Benchmark]: RCFGBuilder took 749.27 ms. Allocated memory is still 199.8 MB. Free memory was 163.1 MB in the beginning and 116.7 MB in the end (delta: 46.4 MB). Peak memory consumption was 46.4 MB. Max. memory is 7.1 GB. [2020-07-20 11:33:28,661 INFO L168 Benchmark]: TraceAbstraction took 90336.28 ms. Allocated memory was 199.8 MB in the beginning and 304.6 MB in the end (delta: 104.9 MB). Free memory was 116.7 MB in the beginning and 238.6 MB in the end (delta: -121.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 11:33:28,664 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 116.4 MB in the beginning and 116.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 796.46 ms. Allocated memory was 141.6 MB in the beginning and 199.8 MB in the end (delta: 58.2 MB). Free memory was 96.5 MB in the beginning and 165.9 MB in the end (delta: -69.5 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 76.89 ms. Allocated memory is still 199.8 MB. Free memory was 165.9 MB in the beginning and 163.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 749.27 ms. Allocated memory is still 199.8 MB. Free memory was 163.1 MB in the beginning and 116.7 MB in the end (delta: 46.4 MB). Peak memory consumption was 46.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 90336.28 ms. Allocated memory was 199.8 MB in the beginning and 304.6 MB in the end (delta: 104.9 MB). Free memory was 116.7 MB in the beginning and 238.6 MB in the end (delta: -121.9 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 605]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L588] const int len = 5; VAL [len=5] [L589] CALL, EXPR dll_create(len) VAL [\old(len)=5] [L568] DLL head = ((void *)0); VAL [\old(len)=5, head={0:0}, len=5] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=5, __VERIFIER_nondet_int() == len? 1 : 0=1, head={0:0}, len=5, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L579] COND FALSE !(\read(head)) VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-3:0}, len=4, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-3:0}, len=4, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-3:0}, len=4, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=4, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-3:0}, len=4, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-3:0}, len=4, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={-3:0}, len=4, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-1:0}, len=3, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-1:0}, len=3, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-1:0}, len=3, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=3, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-1:0}, len=3, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-1:0}, len=3, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={-1:0}, len=3, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-4:0}, len=2, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-4:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-4:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=2, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-4:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-4:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={-4:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-2:0}, len=1, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-2:0}, len=1, malloc(sizeof(struct node))={29307:0}, new_head={29307:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-2:0}, len=1, malloc(sizeof(struct node))={29307:0}, new_head={29307:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=1, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-2:0}, len=1, malloc(sizeof(struct node))={29307:0}, new_head={29307:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-2:0}, len=1, malloc(sizeof(struct node))={29307:0}, new_head={29307:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={-2:0}, len=1, malloc(sizeof(struct node))={29307:0}, new_head={29307:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={29307:0}, len=0, malloc(sizeof(struct node))={29307:0}, new_head={29307:0}] [L569] COND FALSE !(len > 0) VAL [\old(len)=5, head={29307:0}, len=0, malloc(sizeof(struct node))={29307:0}, new_head={29307:0}] [L585] return head; VAL [\old(len)=5, \result={29307:0}, head={29307:0}, len=0, malloc(sizeof(struct node))={29307:0}, new_head={29307:0}] [L589] RET, EXPR dll_create(len) VAL [dll_create(len)={29307:0}, len=5] [L589] DLL head = dll_create(len); [L590] head->next VAL [head={29307:0}, head->next={-2:0}, len=5] [L590] COND TRUE head->next [L591] EXPR head->data_0 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] EXPR head->data_1 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 VAL [0 != head->data_0 || 0 != head->data_1=0, head={29307:0}, head->data_0=0, head->data_1=0, len=5] [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] EXPR head->data_2 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 VAL [0 != head->data_0 || 0 != head->data_1=0, 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2=1, head={29307:0}, head->data_0=0, head->data_1=0, head->data_2=1, len=5] [L591] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L605] __VERIFIER_error() VAL [head={29307:0}, len=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 90.2s, OverallIterations: 9, TraceHistogramMax: 5, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 292 SDtfs, 467 SDslu, 1052 SDs, 0 SdLazy, 511 SolverSat, 46 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 513 GetRequests, 428 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 46 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 50.3s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 355 NumberOfCodeBlocks, 355 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 492 ConstructedInterpolants, 3 QuantifiedInterpolants, 76480 SizeOfPredicates, 35 NumberOfNonLiveVariables, 1455 ConjunctsInSsa, 77 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 211/385 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...