/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 DAGSIZE --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/simple-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 19:58:20,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 19:58:20,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 19:58:20,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 19:58:20,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 19:58:20,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 19:58:20,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 19:58:20,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 19:58:20,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 19:58:20,398 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 19:58:20,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 19:58:20,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 19:58:20,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:58:20,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:58:20,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:58:20,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:58:20,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:58:20,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:58:20,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:58:20,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:58:20,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:58:20,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:58:20,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:58:20,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:58:20,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 19:58:20,434 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 19:58:20,434 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 19:58:20,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 19:58:20,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 19:58:20,438 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 19:58:20,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 19:58:20,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 19:58:20,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 19:58:20,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 19:58:20,444 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 19:58:20,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 19:58:20,446 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 19:58:20,446 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 19:58:20,446 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 19:58:20,447 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 19:58:20,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 19:58:20,450 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 19:58:20,472 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:58:20,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:58:20,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:58:20,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:58:20,477 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:58:20,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:58:20,477 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:58:20,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:58:20,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:58:20,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:58:20,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:58:20,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:58:20,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:58:20,479 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:58:20,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:58:20,479 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:58:20,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:58:20,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:58:20,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:58:20,480 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:58:20,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:58:20,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:58:20,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:58:20,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:58:20,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:58:20,482 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:58:20,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:58:20,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:58:20,483 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:58:20,483 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 -> DAGSIZE 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 19:58:20,921 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:58:20,963 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:58:20,969 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:58:20,973 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:58:20,974 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:58:20,976 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/simple-1.i [2020-07-21 19:58:21,117 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78aedfec2/483ff695c9b84552b12b52a7880191ca/FLAGf21432918 [2020-07-21 19:58:21,988 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:58:21,989 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/simple-1.i [2020-07-21 19:58:22,011 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78aedfec2/483ff695c9b84552b12b52a7880191ca/FLAGf21432918 [2020-07-21 19:58:22,035 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78aedfec2/483ff695c9b84552b12b52a7880191ca [2020-07-21 19:58:22,051 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:58:22,056 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:58:22,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:58:22,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:58:22,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:58:22,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:58:22" (1/1) ... [2020-07-21 19:58:22,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8e24f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:58:22, skipping insertion in model container [2020-07-21 19:58:22,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:58:22" (1/1) ... [2020-07-21 19:58:22,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:58:22,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:58:22,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:58:22,966 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:58:23,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:58:23,102 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:58:23,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:58:23 WrapperNode [2020-07-21 19:58:23,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:58:23,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:58:23,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:58:23,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:58:23,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:58:23" (1/1) ... [2020-07-21 19:58:23,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:58:23" (1/1) ... [2020-07-21 19:58:23,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:58:23" (1/1) ... [2020-07-21 19:58:23,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:58:23" (1/1) ... [2020-07-21 19:58:23,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:58:23" (1/1) ... [2020-07-21 19:58:23,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:58:23" (1/1) ... [2020-07-21 19:58:23,193 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:58:23" (1/1) ... [2020-07-21 19:58:23,202 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:58:23,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:58:23,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:58:23,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:58:23,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:58:23" (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 19:58:23,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:58:23,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:58:23,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-21 19:58:23,312 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-21 19:58:23,312 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-21 19:58:23,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-21 19:58:23,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-21 19:58:23,313 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-21 19:58:23,313 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:58:23,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:58:23,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 19:58:23,314 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 19:58:23,314 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 19:58:23,314 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 19:58:23,315 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 19:58:23,315 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 19:58:23,315 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 19:58:23,315 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 19:58:23,315 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 19:58:23,316 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 19:58:23,316 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 19:58:23,316 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 19:58:23,316 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 19:58:23,316 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 19:58:23,317 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 19:58:23,317 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 19:58:23,317 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 19:58:23,317 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-21 19:58:23,317 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-21 19:58:23,317 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-21 19:58:23,318 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-21 19:58:23,318 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-21 19:58:23,318 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 19:58:23,318 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 19:58:23,318 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 19:58:23,318 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 19:58:23,319 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 19:58:23,319 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 19:58:23,319 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 19:58:23,319 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 19:58:23,319 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 19:58:23,319 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 19:58:23,320 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 19:58:23,320 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 19:58:23,320 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 19:58:23,320 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 19:58:23,320 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 19:58:23,321 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 19:58:23,321 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 19:58:23,321 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 19:58:23,321 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 19:58:23,322 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 19:58:23,322 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 19:58:23,322 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 19:58:23,322 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 19:58:23,322 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 19:58:23,322 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 19:58:23,323 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 19:58:23,323 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 19:58:23,323 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 19:58:23,323 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 19:58:23,323 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 19:58:23,324 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 19:58:23,324 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 19:58:23,324 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 19:58:23,324 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 19:58:23,324 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 19:58:23,324 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 19:58:23,324 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 19:58:23,325 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 19:58:23,325 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 19:58:23,325 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 19:58:23,325 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 19:58:23,325 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 19:58:23,325 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 19:58:23,326 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 19:58:23,326 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 19:58:23,326 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 19:58:23,326 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 19:58:23,326 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 19:58:23,326 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 19:58:23,327 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 19:58:23,327 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 19:58:23,327 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 19:58:23,327 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 19:58:23,327 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 19:58:23,328 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 19:58:23,328 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 19:58:23,328 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 19:58:23,328 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 19:58:23,328 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 19:58:23,329 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 19:58:23,329 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 19:58:23,329 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 19:58:23,329 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 19:58:23,329 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 19:58:23,329 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 19:58:23,329 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 19:58:23,330 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 19:58:23,330 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 19:58:23,330 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 19:58:23,330 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 19:58:23,330 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 19:58:23,330 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 19:58:23,331 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 19:58:23,331 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 19:58:23,331 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 19:58:23,331 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 19:58:23,331 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 19:58:23,332 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 19:58:23,332 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 19:58:23,332 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 19:58:23,332 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 19:58:23,332 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 19:58:23,333 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 19:58:23,333 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 19:58:23,333 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 19:58:23,333 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 19:58:23,333 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-21 19:58:23,334 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:58:23,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 19:58:23,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 19:58:23,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 19:58:23,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 19:58:23,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 19:58:23,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:58:23,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:58:23,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 19:58:23,904 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-21 19:58:24,155 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:58:24,155 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 19:58:24,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:58:24 BoogieIcfgContainer [2020-07-21 19:58:24,163 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:58:24,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:58:24,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:58:24,171 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:58:24,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:58:22" (1/3) ... [2020-07-21 19:58:24,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71316e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:58:24, skipping insertion in model container [2020-07-21 19:58:24,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:58:23" (2/3) ... [2020-07-21 19:58:24,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71316e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:58:24, skipping insertion in model container [2020-07-21 19:58:24,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:58:24" (3/3) ... [2020-07-21 19:58:24,179 INFO L109 eAbstractionObserver]: Analyzing ICFG simple-1.i [2020-07-21 19:58:24,195 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:58:24,212 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:58:24,236 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:58:24,268 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:58:24,268 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:58:24,268 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:58:24,269 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:58:24,269 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:58:24,269 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:58:24,269 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:58:24,270 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:58:24,302 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-21 19:58:24,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 19:58:24,315 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:58:24,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:58:24,318 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:58:24,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:58:24,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1710443637, now seen corresponding path program 1 times [2020-07-21 19:58:24,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:58:24,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394887373] [2020-07-21 19:58:24,348 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 19:58:24,608 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:58:24,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:58:24,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:58:24,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:58:24,835 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 18 treesize of output 7 [2020-07-21 19:58:24,836 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:24,850 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:24,852 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 19:58:24,853 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:11 [2020-07-21 19:58:24,996 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 19:58:25,000 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:25,007 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:25,008 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 19:58:25,009 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-07-21 19:58:25,026 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 19:58:25,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:58:25,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394887373] [2020-07-21 19:58:25,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:58:25,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 19:58:25,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788231498] [2020-07-21 19:58:25,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 19:58:25,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:58:25,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 19:58:25,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 19:58:25,080 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 6 states. [2020-07-21 19:58:25,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:58:25,507 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2020-07-21 19:58:25,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 19:58:25,513 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-07-21 19:58:25,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:58:25,533 INFO L225 Difference]: With dead ends: 58 [2020-07-21 19:58:25,534 INFO L226 Difference]: Without dead ends: 31 [2020-07-21 19:58:25,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 19:58:25,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-21 19:58:25,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-07-21 19:58:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-21 19:58:25,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-07-21 19:58:25,691 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 13 [2020-07-21 19:58:25,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:58:25,693 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-07-21 19:58:25,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 19:58:25,693 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-07-21 19:58:25,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 19:58:25,696 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:58:25,697 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:58:25,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:58:25,912 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:58:25,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:58:25,913 INFO L82 PathProgramCache]: Analyzing trace with hash 714847529, now seen corresponding path program 1 times [2020-07-21 19:58:25,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:58:25,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721444659] [2020-07-21 19:58:25,914 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 19:58:26,038 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:58:26,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:58:26,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 19:58:26,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:58:26,094 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2020-07-21 19:58:26,095 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:26,107 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:26,118 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2020-07-21 19:58:26,119 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:26,130 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:26,132 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 19:58:26,132 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2020-07-21 19:58:26,177 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 19:58:26,178 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:26,189 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:26,196 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 19:58:26,198 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:26,205 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:26,206 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 19:58:26,206 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-07-21 19:58:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:58:26,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:58:26,281 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2020-07-21 19:58:26,286 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-21 19:58:26,305 INFO L624 ElimStorePlain]: treesize reduction 19, result has 36.7 percent of original size [2020-07-21 19:58:26,306 INFO L512 ElimStorePlain]: Eliminatee |v_#memory_$Pointer$.offset_14| vanished before elimination [2020-07-21 19:58:26,306 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-21 19:58:26,307 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2020-07-21 19:58:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:58:26,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721444659] [2020-07-21 19:58:26,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:58:26,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2020-07-21 19:58:26,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768910333] [2020-07-21 19:58:26,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 19:58:26,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:58:26,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 19:58:26,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-21 19:58:26,355 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2020-07-21 19:58:26,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:58:26,538 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-07-21 19:58:26,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 19:58:26,540 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-07-21 19:58:26,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:58:26,541 INFO L225 Difference]: With dead ends: 37 [2020-07-21 19:58:26,542 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 19:58:26,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-21 19:58:26,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 19:58:26,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2020-07-21 19:58:26,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 19:58:26,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-21 19:58:26,553 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-07-21 19:58:26,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:58:26,553 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-21 19:58:26,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 19:58:26,554 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-21 19:58:26,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 19:58:26,554 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:58:26,555 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:58:26,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:58:26,772 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:58:26,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:58:26,773 INFO L82 PathProgramCache]: Analyzing trace with hash -158216428, now seen corresponding path program 1 times [2020-07-21 19:58:26,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:58:26,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608749624] [2020-07-21 19:58:26,777 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 19:58:27,005 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:58:27,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 19:58:27,006 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 19:58:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 19:58:27,052 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 19:58:27,091 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 19:58:27,092 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 19:58:27,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:58:27,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 07:58:27 BoogieIcfgContainer [2020-07-21 19:58:27,354 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 19:58:27,358 INFO L168 Benchmark]: Toolchain (without parser) took 5303.34 ms. Allocated memory was 135.8 MB in the beginning and 229.6 MB in the end (delta: 93.8 MB). Free memory was 99.2 MB in the beginning and 82.2 MB in the end (delta: 17.0 MB). Peak memory consumption was 110.9 MB. Max. memory is 7.1 GB. [2020-07-21 19:58:27,359 INFO L168 Benchmark]: CDTParser took 1.54 ms. Allocated memory is still 135.8 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 19:58:27,361 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1047.81 ms. Allocated memory was 135.8 MB in the beginning and 202.4 MB in the end (delta: 66.6 MB). Free memory was 98.8 MB in the beginning and 168.9 MB in the end (delta: -70.1 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2020-07-21 19:58:27,362 INFO L168 Benchmark]: Boogie Preprocessor took 96.50 ms. Allocated memory is still 202.4 MB. Free memory was 168.9 MB in the beginning and 166.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-07-21 19:58:27,363 INFO L168 Benchmark]: RCFGBuilder took 959.20 ms. Allocated memory is still 202.4 MB. Free memory was 166.0 MB in the beginning and 123.7 MB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2020-07-21 19:58:27,365 INFO L168 Benchmark]: TraceAbstraction took 3189.64 ms. Allocated memory was 202.4 MB in the beginning and 229.6 MB in the end (delta: 27.3 MB). Free memory was 123.0 MB in the beginning and 82.2 MB in the end (delta: 40.8 MB). Peak memory consumption was 68.1 MB. Max. memory is 7.1 GB. [2020-07-21 19:58:27,372 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.54 ms. Allocated memory is still 135.8 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1047.81 ms. Allocated memory was 135.8 MB in the beginning and 202.4 MB in the end (delta: 66.6 MB). Free memory was 98.8 MB in the beginning and 168.9 MB in the end (delta: -70.1 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 96.50 ms. Allocated memory is still 202.4 MB. Free memory was 168.9 MB in the beginning and 166.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 959.20 ms. Allocated memory is still 202.4 MB. Free memory was 166.0 MB in the beginning and 123.7 MB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3189.64 ms. Allocated memory was 202.4 MB in the beginning and 229.6 MB in the end (delta: 27.3 MB). Free memory was 123.0 MB in the beginning and 82.2 MB in the end (delta: 40.8 MB). Peak memory consumption was 68.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 538]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] List a = (List) malloc(sizeof(struct node)); VAL [a={-2:0}, malloc(sizeof(struct node))={-2:0}] [L522] COND FALSE !(a == 0) VAL [a={-2:0}, malloc(sizeof(struct node))={-2:0}] [L523] List t; [L524] List p = a; [L525] a->h = 2 VAL [a={-2:0}, malloc(sizeof(struct node))={-2:0}, p={-2:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] p->h = 1 [L528] t = (List) malloc(sizeof(struct node)) VAL [a={-2:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-1:0}] [L529] COND FALSE !(t == 0) VAL [a={-2:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-1:0}] [L530] p->n = t [L531] EXPR p->n [L531] p = p->n [L526] COND FALSE !(__VERIFIER_nondet_int()) [L533] p->h = 2 [L534] p->n = 0 [L535] p = a VAL [a={-2:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-1:0}] [L536] COND TRUE p!=0 [L537] EXPR p->h VAL [a={-2:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->h=1, t={-1:0}] [L537] COND TRUE p->h != 2 [L538] __VERIFIER_error() VAL [a={-2:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.0s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 34 SDtfs, 84 SDslu, 105 SDs, 0 SdLazy, 69 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred 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: 0.1s AutomataMinimizationTime, 2 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 48 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 3720 SizeOfPredicates, 13 NumberOfNonLiveVariables, 90 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 2/4 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...