/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_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/splice-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:17:35,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:17:35,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:17:35,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:17:35,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:17:35,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:17:35,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:17:35,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:17:35,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:17:35,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:17:35,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:17:35,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:17:35,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:17:35,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:17:35,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:17:35,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:17:35,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:17:35,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:17:35,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:17:35,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:17:35,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:17:35,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:17:35,154 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:17:35,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:17:35,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 16:17:35,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 16:17:35,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 16:17:35,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 16:17:35,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 16:17:35,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 16:17:35,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 16:17:35,163 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 16:17:35,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 16:17:35,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 16:17:35,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 16:17:35,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 16:17:35,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 16:17:35,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 16:17:35,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:17:35,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:17:35,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:17:35,174 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 [2020-07-21 16:17:35,200 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:17:35,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:17:35,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:17:35,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:17:35,203 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:17:35,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:17:35,203 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:17:35,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:17:35,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:17:35,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:17:35,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:17:35,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:17:35,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:17:35,205 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:17:35,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:17:35,206 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:17:35,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:17:35,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:17:35,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:17:35,207 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:17:35,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:17:35,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:17:35,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:17:35,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:17:35,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:17:35,210 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:17:35,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:17:35,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:17:35,210 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:17:35,211 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_VARIABLES 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 -> 2 [2020-07-21 16:17:35,503 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:17:35,517 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:17:35,520 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:17:35,522 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:17:35,522 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:17:35,523 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/splice-1.i [2020-07-21 16:17:35,599 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82e847e12/36aa73f038d94a87a0387e86ed8b93d8/FLAG8fab4f6ba [2020-07-21 16:17:36,144 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:17:36,144 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/splice-1.i [2020-07-21 16:17:36,162 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82e847e12/36aa73f038d94a87a0387e86ed8b93d8/FLAG8fab4f6ba [2020-07-21 16:17:36,451 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82e847e12/36aa73f038d94a87a0387e86ed8b93d8 [2020-07-21 16:17:36,461 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:17:36,463 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:17:36,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:17:36,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:17:36,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:17:36,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:17:36" (1/1) ... [2020-07-21 16:17:36,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14581acf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:36, skipping insertion in model container [2020-07-21 16:17:36,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:17:36" (1/1) ... [2020-07-21 16:17:36,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:17:36,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:17:36,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:17:36,949 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:17:36,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:17:37,096 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:17:37,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:37 WrapperNode [2020-07-21 16:17:37,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:17:37,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:17:37,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:17:37,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:17:37,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:37" (1/1) ... [2020-07-21 16:17:37,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:37" (1/1) ... [2020-07-21 16:17:37,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:37" (1/1) ... [2020-07-21 16:17:37,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:37" (1/1) ... [2020-07-21 16:17:37,183 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:37" (1/1) ... [2020-07-21 16:17:37,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:37" (1/1) ... [2020-07-21 16:17:37,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:37" (1/1) ... [2020-07-21 16:17:37,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:17:37,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:17:37,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:17:37,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:17:37,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:37" (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 [2020-07-21 16:17:37,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:17:37,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:17:37,268 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-21 16:17:37,268 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-21 16:17:37,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-21 16:17:37,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-21 16:17:37,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-21 16:17:37,269 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-21 16:17:37,269 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:17:37,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:17:37,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:17:37,270 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 16:17:37,270 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 16:17:37,270 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 16:17:37,270 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 16:17:37,270 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 16:17:37,271 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 16:17:37,271 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 16:17:37,271 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 16:17:37,271 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 16:17:37,271 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 16:17:37,271 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 16:17:37,271 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 16:17:37,272 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 16:17:37,272 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 16:17:37,272 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 16:17:37,272 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 16:17:37,272 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-21 16:17:37,272 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-21 16:17:37,272 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-21 16:17:37,273 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-21 16:17:37,273 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-21 16:17:37,273 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 16:17:37,273 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 16:17:37,273 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 16:17:37,273 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 16:17:37,274 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 16:17:37,274 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 16:17:37,274 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 16:17:37,274 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 16:17:37,274 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 16:17:37,274 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 16:17:37,275 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 16:17:37,275 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 16:17:37,275 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 16:17:37,275 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 16:17:37,275 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 16:17:37,275 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 16:17:37,276 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 16:17:37,276 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 16:17:37,276 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 16:17:37,276 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 16:17:37,276 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 16:17:37,276 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 16:17:37,276 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 16:17:37,277 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 16:17:37,277 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 16:17:37,277 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 16:17:37,277 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 16:17:37,277 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 16:17:37,277 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 16:17:37,278 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 16:17:37,278 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 16:17:37,278 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 16:17:37,278 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 16:17:37,278 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 16:17:37,278 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 16:17:37,278 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 16:17:37,278 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 16:17:37,279 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 16:17:37,279 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 16:17:37,279 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 16:17:37,279 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 16:17:37,279 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 16:17:37,279 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:17:37,280 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 16:17:37,280 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 16:17:37,280 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 16:17:37,280 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 16:17:37,280 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 16:17:37,280 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 16:17:37,280 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 16:17:37,281 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 16:17:37,281 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 16:17:37,281 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 16:17:37,281 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 16:17:37,281 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 16:17:37,281 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 16:17:37,281 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 16:17:37,282 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 16:17:37,282 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 16:17:37,282 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 16:17:37,282 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 16:17:37,282 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 16:17:37,282 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 16:17:37,282 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 16:17:37,283 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 16:17:37,283 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 16:17:37,283 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 16:17:37,283 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 16:17:37,283 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 16:17:37,283 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 16:17:37,283 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 16:17:37,284 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 16:17:37,284 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 16:17:37,284 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 16:17:37,284 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 16:17:37,284 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 16:17:37,284 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 16:17:37,284 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 16:17:37,285 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 16:17:37,285 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 16:17:37,285 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 16:17:37,285 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 16:17:37,285 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 16:17:37,285 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 16:17:37,285 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 16:17:37,285 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 16:17:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-21 16:17:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:17:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 16:17:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 16:17:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 16:17:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 16:17:37,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 16:17:37,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:17:37,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:17:37,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:17:37,670 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-21 16:17:37,912 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:17:37,912 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-21 16:17:37,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:17:37 BoogieIcfgContainer [2020-07-21 16:17:37,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:17:37,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:17:37,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:17:37,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:17:37,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:17:36" (1/3) ... [2020-07-21 16:17:37,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b9ba256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:17:37, skipping insertion in model container [2020-07-21 16:17:37,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:37" (2/3) ... [2020-07-21 16:17:37,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b9ba256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:17:37, skipping insertion in model container [2020-07-21 16:17:37,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:17:37" (3/3) ... [2020-07-21 16:17:37,937 INFO L109 eAbstractionObserver]: Analyzing ICFG splice-1.i [2020-07-21 16:17:37,946 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:17:37,954 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:17:37,968 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:17:37,991 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:17:37,991 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:17:37,991 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:17:37,991 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:17:37,992 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:17:37,992 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:17:37,992 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:17:37,992 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:17:38,009 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-21 16:17:38,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 16:17:38,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:17:38,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:17:38,018 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:17:38,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:17:38,024 INFO L82 PathProgramCache]: Analyzing trace with hash 661731879, now seen corresponding path program 1 times [2020-07-21 16:17:38,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:17:38,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977614143] [2020-07-21 16:17:38,035 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:17:38,210 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:17:38,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:17:38,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 16:17:38,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:17:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:17:38,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:17:38,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977614143] [2020-07-21 16:17:38,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:17:38,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:17:38,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612583306] [2020-07-21 16:17:38,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:17:38,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:17:38,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:17:38,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:17:38,328 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-07-21 16:17:38,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:17:38,421 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2020-07-21 16:17:38,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:17:38,423 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-21 16:17:38,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:17:38,433 INFO L225 Difference]: With dead ends: 69 [2020-07-21 16:17:38,433 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 16:17:38,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:17:38,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 16:17:38,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-07-21 16:17:38,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 16:17:38,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-07-21 16:17:38,481 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 16 [2020-07-21 16:17:38,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:17:38,481 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-07-21 16:17:38,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:17:38,481 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-07-21 16:17:38,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 16:17:38,483 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:17:38,483 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] [2020-07-21 16:17:38,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:17:38,698 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:17:38,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:17:38,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1721544590, now seen corresponding path program 1 times [2020-07-21 16:17:38,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:17:38,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498961887] [2020-07-21 16:17:38,701 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:17:38,808 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:17:38,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:17:38,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 16:17:38,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:17:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:17:38,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:17:38,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498961887] [2020-07-21 16:17:38,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:17:38,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:17:38,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425307709] [2020-07-21 16:17:38,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:17:38,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:17:38,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:17:38,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:17:38,843 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2020-07-21 16:17:38,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:17:38,903 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2020-07-21 16:17:38,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:17:38,904 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-07-21 16:17:38,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:17:38,907 INFO L225 Difference]: With dead ends: 51 [2020-07-21 16:17:38,907 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 16:17:38,908 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 [2020-07-21 16:17:38,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 16:17:38,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-07-21 16:17:38,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 16:17:38,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2020-07-21 16:17:38,918 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 20 [2020-07-21 16:17:38,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:17:38,918 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2020-07-21 16:17:38,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:17:38,919 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2020-07-21 16:17:38,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 16:17:38,920 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:17:38,920 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:17:39,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:17:39,136 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:17:39,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:17:39,137 INFO L82 PathProgramCache]: Analyzing trace with hash -918584693, now seen corresponding path program 1 times [2020-07-21 16:17:39,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:17:39,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765946290] [2020-07-21 16:17:39,138 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:17:39,238 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:17:39,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:17:39,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 16:17:39,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:17:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 16:17:39,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:17:39,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765946290] [2020-07-21 16:17:39,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:17:39,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:17:39,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330130398] [2020-07-21 16:17:39,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:17:39,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:17:39,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:17:39,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:17:39,290 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 4 states. [2020-07-21 16:17:39,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:17:39,353 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2020-07-21 16:17:39,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 16:17:39,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-21 16:17:39,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:17:39,355 INFO L225 Difference]: With dead ends: 74 [2020-07-21 16:17:39,355 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 16:17:39,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:17:39,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 16:17:39,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2020-07-21 16:17:39,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 16:17:39,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-07-21 16:17:39,363 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 21 [2020-07-21 16:17:39,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:17:39,364 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-07-21 16:17:39,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:17:39,364 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-07-21 16:17:39,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 16:17:39,365 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:17:39,365 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:17:39,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:17:39,580 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:17:39,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:17:39,581 INFO L82 PathProgramCache]: Analyzing trace with hash -743556192, now seen corresponding path program 1 times [2020-07-21 16:17:39,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:17:39,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252819362] [2020-07-21 16:17:39,582 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:17:39,763 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:17:39,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 16:17:39,764 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:17:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 16:17:39,802 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:17:39,831 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 16:17:39,832 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 16:17:40,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:17:40,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:17:40 BoogieIcfgContainer [2020-07-21 16:17:40,079 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:17:40,082 INFO L168 Benchmark]: Toolchain (without parser) took 3619.19 ms. Allocated memory was 136.3 MB in the beginning and 253.2 MB in the end (delta: 116.9 MB). Free memory was 99.7 MB in the beginning and 214.6 MB in the end (delta: -114.9 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-07-21 16:17:40,083 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 16:17:40,085 INFO L168 Benchmark]: CACSL2BoogieTranslator took 633.49 ms. Allocated memory was 136.3 MB in the beginning and 200.8 MB in the end (delta: 64.5 MB). Free memory was 99.3 MB in the beginning and 168.0 MB in the end (delta: -68.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2020-07-21 16:17:40,086 INFO L168 Benchmark]: Boogie Preprocessor took 108.15 ms. Allocated memory is still 200.8 MB. Free memory was 168.0 MB in the beginning and 163.9 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. [2020-07-21 16:17:40,086 INFO L168 Benchmark]: RCFGBuilder took 714.90 ms. Allocated memory is still 200.8 MB. Free memory was 163.9 MB in the beginning and 117.7 MB in the end (delta: 46.2 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB. [2020-07-21 16:17:40,087 INFO L168 Benchmark]: TraceAbstraction took 2153.67 ms. Allocated memory was 200.8 MB in the beginning and 253.2 MB in the end (delta: 52.4 MB). Free memory was 117.0 MB in the beginning and 214.6 MB in the end (delta: -97.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 16:17:40,091 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 633.49 ms. Allocated memory was 136.3 MB in the beginning and 200.8 MB in the end (delta: 64.5 MB). Free memory was 99.3 MB in the beginning and 168.0 MB in the end (delta: -68.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.15 ms. Allocated memory is still 200.8 MB. Free memory was 168.0 MB in the beginning and 163.9 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 714.90 ms. Allocated memory is still 200.8 MB. Free memory was 163.9 MB in the beginning and 117.7 MB in the end (delta: 46.2 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2153.67 ms. Allocated memory was 200.8 MB in the beginning and 253.2 MB in the end (delta: 52.4 MB). Free memory was 117.0 MB in the beginning and 214.6 MB in the end (delta: -97.7 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 573]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] int flag = 1; [L522] List a = (List) malloc(sizeof(struct node)); VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}] [L523] COND FALSE !(a == 0) VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}] [L524] List t; [L525] List l1; [L526] List l2; [L527] List b; [L528] List u; [L529] List p = a; VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L530] COND TRUE __VERIFIER_nondet_int() [L531] COND TRUE \read(flag) [L532] p->h = 1 [L533] flag = 0 VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L538] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={21238:0}, p={-1:0}, t={21238:0}] [L539] COND FALSE !(t == 0) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={21238:0}, p={-1:0}, t={21238:0}] [L540] p->n = t [L541] EXPR p->n [L541] p = p->n [L530] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 3 [L544] EXPR a->h VAL [a={-1:0}, a->h=1, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={21238:0}, p={21238:0}, t={21238:0}] [L544] COND FALSE !(a->h == 3) [L545] flag = 1 [L546] l1 = 0 [L547] l2 = 0 [L548] p = a VAL [a={-1:0}, flag=1, l1={0:0}, l2={0:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={21238:0}, p={-1:0}, t={21238:0}] [L549] EXPR p->h VAL [a={-1:0}, flag=1, l1={0:0}, l2={0:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={21238:0}, p={-1:0}, p->h=1, t={21238:0}] [L549] COND TRUE p->h != 3 [L550] t = p [L551] EXPR p->n [L551] p = p->n [L552] COND TRUE \read(flag) [L553] t->n = l1 [L554] l1 = t [L555] flag = 0 VAL [a={-1:0}, flag=0, l1={-1:0}, l2={0:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={21238:0}, p={21238:0}, t={-1:0}] [L549] EXPR p->h VAL [a={-1:0}, flag=0, l1={-1:0}, l2={0:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={21238:0}, p={21238:0}, p->h=3, t={-1:0}] [L549] COND FALSE !(p->h != 3) [L562] p = l1 VAL [a={-1:0}, flag=0, l1={-1:0}, l2={0:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={21238:0}, p={-1:0}, t={-1:0}] [L563] COND TRUE p != 0 [L564] EXPR p->h VAL [a={-1:0}, flag=0, l1={-1:0}, l2={0:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={21238:0}, p={-1:0}, p->h=1, t={-1:0}] [L564] COND TRUE p->h != 2 [L573] __VERIFIER_error() VAL [a={-1:0}, flag=0, l1={-1:0}, l2={0:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={21238:0}, p={-1:0}, t={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 52 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.0s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 102 SDtfs, 32 SDslu, 159 SDs, 0 SdLazy, 69 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=3, 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, 3 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 84 NumberOfCodeBlocks, 56 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 2340 SizeOfPredicates, 13 NumberOfNonLiveVariables, 190 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 2/2 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...