/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:58:01,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:58:01,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:58:01,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:58:01,081 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:58:01,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:58:01,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:58:01,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:58:01,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:58:01,100 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:58:01,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:58:01,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:58:01,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:58:01,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:58:01,110 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:58:01,111 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:58:01,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:58:01,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:58:01,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:58:01,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:58:01,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:58:01,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:58:01,135 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:58:01,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:58:01,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 13:58:01,138 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 13:58:01,138 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 13:58:01,142 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 13:58:01,142 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 13:58:01,143 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 13:58:01,143 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 13:58:01,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 13:58:01,145 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 13:58:01,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 13:58:01,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 13:58:01,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 13:58:01,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 13:58:01,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 13:58:01,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:58:01,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:58:01,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:58:01,153 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 13:58:01,189 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:58:01,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:58:01,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:58:01,194 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:58:01,194 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:58:01,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:58:01,195 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:58:01,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:58:01,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:58:01,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:58:01,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:58:01,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:58:01,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:58:01,197 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:58:01,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:58:01,198 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:58:01,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:58:01,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:58:01,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:58:01,200 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:58:01,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:58:01,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:58:01,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:58:01,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:58:01,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:58:01,204 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:58:01,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:58:01,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:58:01,204 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:58:01,205 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 13:58:01,542 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:58:01,556 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:58:01,560 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:58:01,562 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:58:01,562 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:58:01,563 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-07-20 13:58:01,642 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aac028f6/bebf0025689a4460930c9f8fb42c5aae/FLAGd0f8b0834 [2020-07-20 13:58:02,200 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:58:02,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-07-20 13:58:02,218 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aac028f6/bebf0025689a4460930c9f8fb42c5aae/FLAGd0f8b0834 [2020-07-20 13:58:02,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aac028f6/bebf0025689a4460930c9f8fb42c5aae [2020-07-20 13:58:02,508 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:58:02,510 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:58:02,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:58:02,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:58:02,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:58:02,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:58:02" (1/1) ... [2020-07-20 13:58:02,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48d86fdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:58:02, skipping insertion in model container [2020-07-20 13:58:02,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:58:02" (1/1) ... [2020-07-20 13:58:02,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:58:02,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:58:03,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:58:03,052 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:58:03,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:58:03,169 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:58:03,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:58:03 WrapperNode [2020-07-20 13:58:03,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:58:03,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:58:03,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:58:03,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:58:03,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:58:03" (1/1) ... [2020-07-20 13:58:03,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:58:03" (1/1) ... [2020-07-20 13:58:03,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:58:03" (1/1) ... [2020-07-20 13:58:03,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:58:03" (1/1) ... [2020-07-20 13:58:03,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:58:03" (1/1) ... [2020-07-20 13:58:03,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:58:03" (1/1) ... [2020-07-20 13:58:03,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:58:03" (1/1) ... [2020-07-20 13:58:03,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:58:03,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:58:03,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:58:03,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:58:03,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:58:03" (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 13:58:03,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:58:03,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:58:03,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 13:58:03,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 13:58:03,298 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-20 13:58:03,299 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-07-20 13:58:03,299 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-07-20 13:58:03,299 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-07-20 13:58:03,299 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:58:03,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:58:03,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:58:03,300 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 13:58:03,300 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 13:58:03,300 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 13:58:03,300 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 13:58:03,301 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 13:58:03,301 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 13:58:03,301 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 13:58:03,301 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 13:58:03,301 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 13:58:03,301 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 13:58:03,301 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 13:58:03,302 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 13:58:03,302 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 13:58:03,302 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 13:58:03,302 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 13:58:03,302 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 13:58:03,302 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 13:58:03,303 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 13:58:03,303 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 13:58:03,303 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 13:58:03,303 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 13:58:03,303 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 13:58:03,303 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 13:58:03,304 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 13:58:03,304 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 13:58:03,304 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 13:58:03,304 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 13:58:03,304 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 13:58:03,304 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 13:58:03,304 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 13:58:03,304 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 13:58:03,304 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 13:58:03,305 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 13:58:03,305 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 13:58:03,305 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 13:58:03,305 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 13:58:03,305 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 13:58:03,305 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 13:58:03,305 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 13:58:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 13:58:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 13:58:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 13:58:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 13:58:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 13:58:03,307 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 13:58:03,307 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 13:58:03,307 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 13:58:03,307 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 13:58:03,307 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 13:58:03,307 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 13:58:03,308 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 13:58:03,308 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 13:58:03,308 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 13:58:03,308 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 13:58:03,308 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 13:58:03,308 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 13:58:03,308 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 13:58:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 13:58:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 13:58:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 13:58:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 13:58:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 13:58:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 13:58:03,310 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 13:58:03,310 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 13:58:03,310 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 13:58:03,310 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 13:58:03,310 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 13:58:03,310 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 13:58:03,311 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 13:58:03,311 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 13:58:03,311 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 13:58:03,311 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 13:58:03,311 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 13:58:03,312 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 13:58:03,312 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 13:58:03,312 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 13:58:03,312 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 13:58:03,312 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 13:58:03,312 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 13:58:03,313 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 13:58:03,313 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 13:58:03,313 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 13:58:03,313 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 13:58:03,313 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 13:58:03,313 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 13:58:03,314 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 13:58:03,314 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 13:58:03,314 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 13:58:03,314 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 13:58:03,314 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 13:58:03,314 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 13:58:03,315 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 13:58:03,315 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 13:58:03,315 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 13:58:03,315 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 13:58:03,315 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 13:58:03,316 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 13:58:03,316 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 13:58:03,316 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 13:58:03,316 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 13:58:03,316 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 13:58:03,316 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 13:58:03,317 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 13:58:03,317 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 13:58:03,317 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-20 13:58:03,317 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-07-20 13:58:03,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 13:58:03,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 13:58:03,318 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-07-20 13:58:03,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 13:58:03,318 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-07-20 13:58:03,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 13:58:03,318 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:58:03,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:58:03,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:58:03,667 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-20 13:58:03,867 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:58:03,867 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-20 13:58:03,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:58:03 BoogieIcfgContainer [2020-07-20 13:58:03,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:58:03,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:58:03,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:58:03,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:58:03,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:58:02" (1/3) ... [2020-07-20 13:58:03,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@186dff33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:58:03, skipping insertion in model container [2020-07-20 13:58:03,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:58:03" (2/3) ... [2020-07-20 13:58:03,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@186dff33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:58:03, skipping insertion in model container [2020-07-20 13:58:03,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:58:03" (3/3) ... [2020-07-20 13:58:03,884 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-07-20 13:58:03,896 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:58:03,905 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:58:03,921 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:58:03,942 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:58:03,942 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:58:03,942 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:58:03,943 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:58:03,943 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:58:03,943 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:58:03,943 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:58:03,943 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:58:03,965 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-07-20 13:58:03,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 13:58:03,973 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:58:03,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:58:03,974 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:58:03,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:58:03,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1666427650, now seen corresponding path program 1 times [2020-07-20 13:58:03,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:58:03,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960855607] [2020-07-20 13:58:03,992 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:58:04,162 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:58:04,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:58:04,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 13:58:04,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:58:04,225 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 13:58:04,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:58:04,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960855607] [2020-07-20 13:58:04,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:58:04,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 13:58:04,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364819109] [2020-07-20 13:58:04,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 13:58:04,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:58:04,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 13:58:04,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 13:58:04,254 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2020-07-20 13:58:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:58:04,286 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2020-07-20 13:58:04,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 13:58:04,288 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2020-07-20 13:58:04,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:58:04,298 INFO L225 Difference]: With dead ends: 73 [2020-07-20 13:58:04,298 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 13:58:04,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 13:58:04,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 13:58:04,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 13:58:04,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 13:58:04,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-20 13:58:04,348 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-07-20 13:58:04,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:58:04,348 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-20 13:58:04,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 13:58:04,349 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-20 13:58:04,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 13:58:04,350 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:58:04,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:58:04,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:58:04,555 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:58:04,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:58:04,555 INFO L82 PathProgramCache]: Analyzing trace with hash -29727073, now seen corresponding path program 1 times [2020-07-20 13:58:04,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:58:04,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391002200] [2020-07-20 13:58:04,556 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:58:04,659 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:58:04,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:58:04,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:58:04,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:58:04,717 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 13:58:04,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:58:04,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391002200] [2020-07-20 13:58:04,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:58:04,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:58:04,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154207252] [2020-07-20 13:58:04,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:58:04,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:58:04,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:58:04,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:58:04,722 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-07-20 13:58:04,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:58:04,777 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-07-20 13:58:04,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:58:04,778 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-07-20 13:58:04,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:58:04,779 INFO L225 Difference]: With dead ends: 45 [2020-07-20 13:58:04,780 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 13:58:04,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 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 13:58:04,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 13:58:04,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-07-20 13:58:04,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 13:58:04,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-20 13:58:04,789 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2020-07-20 13:58:04,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:58:04,789 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-20 13:58:04,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:58:04,790 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-20 13:58:04,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 13:58:04,791 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:58:04,791 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:58:05,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:58:05,006 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:58:05,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:58:05,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1680455870, now seen corresponding path program 1 times [2020-07-20 13:58:05,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:58:05,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803836904] [2020-07-20 13:58:05,008 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:58:05,123 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:58:05,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:58:05,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 13:58:05,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:58:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:58:05,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:58:05,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803836904] [2020-07-20 13:58:05,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:58:05,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 13:58:05,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564269220] [2020-07-20 13:58:05,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 13:58:05,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:58:05,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 13:58:05,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 13:58:05,187 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2020-07-20 13:58:05,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:58:05,274 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-07-20 13:58:05,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:58:05,274 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-20 13:58:05,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:58:05,276 INFO L225 Difference]: With dead ends: 39 [2020-07-20 13:58:05,276 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 13:58:05,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-07-20 13:58:05,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 13:58:05,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 13:58:05,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 13:58:05,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-20 13:58:05,284 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 28 [2020-07-20 13:58:05,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:58:05,284 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-20 13:58:05,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 13:58:05,284 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-20 13:58:05,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 13:58:05,285 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:58:05,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:58:05,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:58:05,501 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:58:05,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:58:05,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1808388506, now seen corresponding path program 1 times [2020-07-20 13:58:05,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:58:05,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903686110] [2020-07-20 13:58:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:58:05,617 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:58:05,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:58:05,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 13:58:05,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:58:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:58:05,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:58:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:58:05,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903686110] [2020-07-20 13:58:05,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:58:05,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-20 13:58:05,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325173054] [2020-07-20 13:58:05,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 13:58:05,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:58:05,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 13:58:05,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 13:58:05,799 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 9 states. [2020-07-20 13:58:05,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:58:05,856 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-07-20 13:58:05,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:58:05,857 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-20 13:58:05,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:58:05,858 INFO L225 Difference]: With dead ends: 50 [2020-07-20 13:58:05,858 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 13:58:05,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 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 13:58:05,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 13:58:05,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-07-20 13:58:05,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 13:58:05,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-20 13:58:05,866 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2020-07-20 13:58:05,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:58:05,867 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-20 13:58:05,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 13:58:05,867 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-20 13:58:05,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 13:58:05,868 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:58:05,869 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:58:06,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:58:06,083 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:58:06,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:58:06,083 INFO L82 PathProgramCache]: Analyzing trace with hash 560900285, now seen corresponding path program 2 times [2020-07-20 13:58:06,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:58:06,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542350627] [2020-07-20 13:58:06,085 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:58:06,190 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:58:06,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:58:06,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-20 13:58:06,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:58:06,279 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 13:58:06,280 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:58:06,287 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:58:06,288 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:58:06,289 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2020-07-20 13:58:06,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:58:06,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:58:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:58:06,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542350627] [2020-07-20 13:58:06,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:58:06,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2020-07-20 13:58:06,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716555791] [2020-07-20 13:58:06,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 13:58:06,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:58:06,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 13:58:06,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-07-20 13:58:06,820 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 21 states. [2020-07-20 13:58:09,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:58:09,199 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-07-20 13:58:09,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 13:58:09,202 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2020-07-20 13:58:09,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:58:09,203 INFO L225 Difference]: With dead ends: 43 [2020-07-20 13:58:09,203 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 13:58:09,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2020-07-20 13:58:09,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 13:58:09,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-07-20 13:58:09,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 13:58:09,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-07-20 13:58:09,213 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 32 [2020-07-20 13:58:09,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:58:09,214 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-07-20 13:58:09,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 13:58:09,214 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-07-20 13:58:09,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 13:58:09,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:58:09,215 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:58:09,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:58:09,419 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:58:09,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:58:09,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1724014721, now seen corresponding path program 3 times [2020-07-20 13:58:09,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:58:09,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929486876] [2020-07-20 13:58:09,420 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:58:09,515 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:58:09,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:58:09,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 13:58:09,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:58:09,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 13:58:09,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:58:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 13:58:09,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929486876] [2020-07-20 13:58:09,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:58:09,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 13:58:09,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486477621] [2020-07-20 13:58:09,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 13:58:09,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:58:09,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 13:58:09,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-07-20 13:58:09,678 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 10 states. [2020-07-20 13:58:09,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:58:09,755 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2020-07-20 13:58:09,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:58:09,756 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-07-20 13:58:09,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:58:09,757 INFO L225 Difference]: With dead ends: 55 [2020-07-20 13:58:09,757 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 13:58:09,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:58:09,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 13:58:09,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-07-20 13:58:09,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 13:58:09,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-07-20 13:58:09,770 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 33 [2020-07-20 13:58:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:58:09,771 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-07-20 13:58:09,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 13:58:09,772 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-07-20 13:58:09,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 13:58:09,773 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:58:09,773 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:58:09,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:58:09,975 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:58:09,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:58:09,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1265881822, now seen corresponding path program 4 times [2020-07-20 13:58:09,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:58:09,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723423273] [2020-07-20 13:58:09,977 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:58:10,099 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:58:10,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:58:10,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 55 conjunts are in the unsatisfiable core [2020-07-20 13:58:10,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:58:10,119 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 13:58:10,120 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:58:10,126 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:58:10,126 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:58:10,127 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:13 [2020-07-20 13:58:10,146 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 13:58:10,146 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:58:10,154 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:58:10,155 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:58:10,156 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-07-20 13:58:10,202 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:58:10,203 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 13:58:10,204 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:58:10,217 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:58:10,218 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:58:10,218 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:16 [2020-07-20 13:58:10,239 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.offset_28|], 2=[|v_#memory_$Pointer$.base_34|]} [2020-07-20 13:58:10,245 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 13:58:10,245 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:58:10,254 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:58:10,260 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2020-07-20 13:58:10,261 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:58:10,275 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:58:10,276 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 13:58:10,277 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:35, output treesize:28 [2020-07-20 13:58:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:58:10,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:58:15,358 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 13:58:15,378 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:58:15,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:58:15,384 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 13:58:15,384 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:33 [2020-07-20 13:58:15,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:58:15,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:58:15,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:58:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:58:16,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723423273] [2020-07-20 13:58:16,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:58:16,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2020-07-20 13:58:16,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056279427] [2020-07-20 13:58:16,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 13:58:16,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:58:16,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 13:58:16,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=670, Unknown=5, NotChecked=0, Total=756 [2020-07-20 13:58:16,373 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 28 states. [2020-07-20 13:58:21,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:58:21,440 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-07-20 13:58:21,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 13:58:21,446 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2020-07-20 13:58:21,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:58:21,447 INFO L225 Difference]: With dead ends: 47 [2020-07-20 13:58:21,447 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 13:58:21,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=184, Invalid=1063, Unknown=13, NotChecked=0, Total=1260 [2020-07-20 13:58:21,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 13:58:21,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-07-20 13:58:21,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 13:58:21,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-07-20 13:58:21,455 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 36 [2020-07-20 13:58:21,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:58:21,456 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-07-20 13:58:21,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 13:58:21,456 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-07-20 13:58:21,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 13:58:21,457 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:58:21,457 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:58:21,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:58:21,659 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:58:21,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:58:21,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1775282106, now seen corresponding path program 5 times [2020-07-20 13:58:21,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:58:21,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020392722] [2020-07-20 13:58:21,661 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:58:21,789 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:58:21,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 13:58:21,790 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:58:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 13:58:21,807 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:58:21,841 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 13:58:21,841 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 13:58:22,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:58:22,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:58:22 BoogieIcfgContainer [2020-07-20 13:58:22,091 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:58:22,093 INFO L168 Benchmark]: Toolchain (without parser) took 19583.35 ms. Allocated memory was 144.7 MB in the beginning and 287.3 MB in the end (delta: 142.6 MB). Free memory was 101.6 MB in the beginning and 146.8 MB in the end (delta: -45.3 MB). Peak memory consumption was 97.3 MB. Max. memory is 7.1 GB. [2020-07-20 13:58:22,094 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 13:58:22,095 INFO L168 Benchmark]: CACSL2BoogieTranslator took 658.92 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 101.3 MB in the beginning and 168.4 MB in the end (delta: -67.1 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-07-20 13:58:22,095 INFO L168 Benchmark]: Boogie Preprocessor took 64.04 ms. Allocated memory is still 201.9 MB. Free memory was 168.4 MB in the beginning and 165.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-20 13:58:22,096 INFO L168 Benchmark]: RCFGBuilder took 637.67 ms. Allocated memory is still 201.9 MB. Free memory was 165.7 MB in the beginning and 122.6 MB in the end (delta: 43.2 MB). Peak memory consumption was 43.2 MB. Max. memory is 7.1 GB. [2020-07-20 13:58:22,097 INFO L168 Benchmark]: TraceAbstraction took 18216.71 ms. Allocated memory was 201.9 MB in the beginning and 287.3 MB in the end (delta: 85.5 MB). Free memory was 122.6 MB in the beginning and 146.8 MB in the end (delta: -24.3 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. [2020-07-20 13:58:22,100 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 658.92 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 101.3 MB in the beginning and 168.4 MB in the end (delta: -67.1 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 64.04 ms. Allocated memory is still 201.9 MB. Free memory was 168.4 MB in the beginning and 165.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 637.67 ms. Allocated memory is still 201.9 MB. Free memory was 165.7 MB in the beginning and 122.6 MB in the end (delta: 43.2 MB). Peak memory consumption was 43.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 18216.71 ms. Allocated memory was 201.9 MB in the beginning and 287.3 MB in the end (delta: 85.5 MB). Free memory was 122.6 MB in the beginning and 146.8 MB in the end (delta: -24.3 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L592] int len = 2; VAL [len=2] [L593] len < 32 && __VERIFIER_nondet_int() [L593] len < 32 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, len=2, len < 32 && __VERIFIER_nondet_int()=0] [L593] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L596] CALL, EXPR sll_create(len + 1) VAL [\old(len)=3] [L564] SLL head = ((void *)0); VAL [\old(len)=3, head={0:0}, len=3] [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={0:0}, len=3, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={0:0}, len=3, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L570] new_head->next = head [L571] head = new_head [L572] len-- VAL [\old(len)=3, head={-1:0}, len=2, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={-1:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={-1:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L570] new_head->next = head [L571] head = new_head [L572] len-- VAL [\old(len)=3, head={-2:0}, len=1, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={-2:0}, len=1, malloc(sizeof(struct node))={2332:0}, new_head={2332:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={-2:0}, len=1, malloc(sizeof(struct node))={2332:0}, new_head={2332:0}] [L570] new_head->next = head [L571] head = new_head [L572] len-- VAL [\old(len)=3, head={2332:0}, len=0, malloc(sizeof(struct node))={2332:0}, new_head={2332:0}] [L565] COND FALSE !(len > 0) VAL [\old(len)=3, head={2332:0}, len=0, malloc(sizeof(struct node))={2332:0}, new_head={2332:0}] [L574] return head; VAL [\old(len)=3, \result={2332:0}, head={2332:0}, len=0, malloc(sizeof(struct node))={2332:0}, new_head={2332:0}] [L596] RET, EXPR sll_create(len + 1) VAL [len=2, sll_create(len + 1)={2332:0}] [L596] SLL s = sll_create(len + 1); [L597] CALL, EXPR sll_length(s) VAL [head={2332:0}] [L577] int len = 0; VAL [head={2332:0}, head={2332:0}, len=0] [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND FALSE !(\read(head)) VAL [head={0:0}, head={2332:0}, len=3] [L582] return len; VAL [\result=3, head={2332:0}, head={0:0}, len=3] [L597] RET, EXPR sll_length(s) VAL [len=2, s={2332:0}, sll_length(s)=3] [L597] COND TRUE len != sll_length(s) [L602] __VERIFIER_error() VAL [len=2, s={2332:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 18.1s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 7.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 198 SDtfs, 173 SDslu, 1066 SDs, 0 SdLazy, 597 SolverSat, 39 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 3.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 348 GetRequests, 254 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 10.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 12 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 7.4s InterpolantComputationTime, 243 NumberOfCodeBlocks, 192 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 325 ConstructedInterpolants, 18 QuantifiedInterpolants, 53910 SizeOfPredicates, 45 NumberOfNonLiveVariables, 772 ConjunctsInSsa, 128 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 20/63 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...