/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 4 -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 [2020-07-20 17:13:10,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:13:10,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:13:10,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:13:10,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:13:10,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:13:10,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:13:10,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:13:10,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:13:10,781 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:13:10,783 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:13:10,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:13:10,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:13:10,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:13:10,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:13:10,791 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:13:10,793 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:13:10,795 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:13:10,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:13:10,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:13:10,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:13:10,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:13:10,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:13:10,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:13:10,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 17:13:10,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 17:13:10,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 17:13:10,821 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 17:13:10,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 17:13:10,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 17:13:10,824 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 17:13:10,825 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 17:13:10,826 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 17:13:10,827 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 17:13:10,828 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 17:13:10,828 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 17:13:10,830 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 17:13:10,830 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 17:13:10,830 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:13:10,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:13:10,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:13:10,834 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 17:13:10,869 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:13:10,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:13:10,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:13:10,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:13:10,873 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:13:10,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:13:10,873 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:13:10,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:13:10,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:13:10,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:13:10,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:13:10,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:13:10,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:13:10,876 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:13:10,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:13:10,876 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:13:10,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:13:10,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:13:10,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:13:10,877 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:13:10,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:13:10,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:13:10,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:13:10,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:13:10,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:13:10,879 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:13:10,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:13:10,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:13:10,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:13:10,879 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 -> 4 [2020-07-20 17:13:11,189 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:13:11,208 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:13:11,213 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:13:11,215 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:13:11,217 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:13:11,218 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/splice-1.i [2020-07-20 17:13:11,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fc9775c6/1bc5c0ffefcd441195ff7b594b7b8a6d/FLAGefab43943 [2020-07-20 17:13:11,924 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:13:11,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/splice-1.i [2020-07-20 17:13:11,942 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fc9775c6/1bc5c0ffefcd441195ff7b594b7b8a6d/FLAGefab43943 [2020-07-20 17:13:12,190 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fc9775c6/1bc5c0ffefcd441195ff7b594b7b8a6d [2020-07-20 17:13:12,200 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:13:12,204 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:13:12,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:13:12,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:13:12,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:13:12,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:13:12" (1/1) ... [2020-07-20 17:13:12,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@416ba85b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:13:12, skipping insertion in model container [2020-07-20 17:13:12,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:13:12" (1/1) ... [2020-07-20 17:13:12,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:13:12,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:13:12,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:13:12,837 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:13:12,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:13:12,988 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:13:12,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:13:12 WrapperNode [2020-07-20 17:13:12,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:13:12,990 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:13:12,990 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:13:12,990 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:13:13,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:13:12" (1/1) ... [2020-07-20 17:13:13,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:13:12" (1/1) ... [2020-07-20 17:13:13,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:13:12" (1/1) ... [2020-07-20 17:13:13,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:13:12" (1/1) ... [2020-07-20 17:13:13,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:13:12" (1/1) ... [2020-07-20 17:13:13,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:13:12" (1/1) ... [2020-07-20 17:13:13,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:13:12" (1/1) ... [2020-07-20 17:13:13,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:13:13,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:13:13,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:13:13,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:13:13,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:13:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:13:13,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:13:13,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:13:13,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 17:13:13,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 17:13:13,173 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-20 17:13:13,173 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-20 17:13:13,173 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-20 17:13:13,173 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-20 17:13:13,173 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:13:13,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:13:13,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:13:13,174 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 17:13:13,174 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 17:13:13,175 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 17:13:13,175 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 17:13:13,175 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 17:13:13,175 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 17:13:13,175 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 17:13:13,176 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 17:13:13,176 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 17:13:13,176 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 17:13:13,177 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 17:13:13,177 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 17:13:13,177 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 17:13:13,177 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 17:13:13,177 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 17:13:13,177 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 17:13:13,178 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 17:13:13,178 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 17:13:13,178 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-20 17:13:13,178 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-20 17:13:13,178 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-20 17:13:13,179 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 17:13:13,179 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 17:13:13,179 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 17:13:13,179 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 17:13:13,179 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 17:13:13,179 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 17:13:13,179 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 17:13:13,180 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 17:13:13,180 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 17:13:13,180 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 17:13:13,180 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 17:13:13,180 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 17:13:13,180 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 17:13:13,181 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 17:13:13,181 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 17:13:13,181 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 17:13:13,181 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 17:13:13,181 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 17:13:13,181 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 17:13:13,182 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 17:13:13,182 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 17:13:13,182 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 17:13:13,182 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 17:13:13,182 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 17:13:13,182 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 17:13:13,183 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 17:13:13,183 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 17:13:13,183 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 17:13:13,183 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 17:13:13,183 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 17:13:13,183 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 17:13:13,184 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 17:13:13,184 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 17:13:13,184 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 17:13:13,184 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 17:13:13,184 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 17:13:13,185 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 17:13:13,185 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 17:13:13,185 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 17:13:13,185 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 17:13:13,185 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 17:13:13,185 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 17:13:13,186 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:13:13,186 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 17:13:13,186 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 17:13:13,186 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 17:13:13,186 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 17:13:13,186 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 17:13:13,187 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 17:13:13,187 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 17:13:13,187 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 17:13:13,187 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 17:13:13,187 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 17:13:13,187 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 17:13:13,188 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 17:13:13,188 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 17:13:13,188 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 17:13:13,188 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 17:13:13,188 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 17:13:13,188 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 17:13:13,188 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 17:13:13,189 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 17:13:13,189 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 17:13:13,189 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 17:13:13,189 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 17:13:13,189 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 17:13:13,189 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 17:13:13,190 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 17:13:13,190 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 17:13:13,190 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 17:13:13,190 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 17:13:13,190 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 17:13:13,190 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 17:13:13,190 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 17:13:13,191 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 17:13:13,191 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 17:13:13,191 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 17:13:13,191 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 17:13:13,191 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 17:13:13,191 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 17:13:13,191 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 17:13:13,192 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 17:13:13,192 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 17:13:13,192 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 17:13:13,192 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 17:13:13,192 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 17:13:13,192 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-20 17:13:13,193 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:13:13,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 17:13:13,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 17:13:13,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 17:13:13,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 17:13:13,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 17:13:13,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:13:13,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:13:13,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:13:13,598 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-20 17:13:13,839 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:13:13,840 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-20 17:13:13,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:13:13 BoogieIcfgContainer [2020-07-20 17:13:13,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:13:13,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:13:13,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:13:13,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:13:13,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:13:12" (1/3) ... [2020-07-20 17:13:13,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29db8571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:13:13, skipping insertion in model container [2020-07-20 17:13:13,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:13:12" (2/3) ... [2020-07-20 17:13:13,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29db8571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:13:13, skipping insertion in model container [2020-07-20 17:13:13,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:13:13" (3/3) ... [2020-07-20 17:13:13,855 INFO L109 eAbstractionObserver]: Analyzing ICFG splice-1.i [2020-07-20 17:13:13,868 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:13:13,879 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:13:13,895 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:13:13,918 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:13:13,918 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:13:13,918 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:13:13,918 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:13:13,918 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:13:13,919 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:13:13,919 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:13:13,919 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:13:13,940 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-20 17:13:13,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 17:13:13,949 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:13:13,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:13:13,951 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:13:13,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:13:13,959 INFO L82 PathProgramCache]: Analyzing trace with hash 661731879, now seen corresponding path program 1 times [2020-07-20 17:13:13,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:13:13,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542017483] [2020-07-20 17:13:13,971 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:13:14,189 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:13:14,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:13:14,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 17:13:14,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:13:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:13:14,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:13:14,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542017483] [2020-07-20 17:13:14,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:13:14,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:13:14,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68133936] [2020-07-20 17:13:14,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:13:14,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:13:14,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:13:14,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:13:14,310 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-07-20 17:13:14,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:13:14,434 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2020-07-20 17:13:14,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:13:14,437 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-20 17:13:14,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:13:14,447 INFO L225 Difference]: With dead ends: 69 [2020-07-20 17:13:14,447 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 17:13:14,452 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 [2020-07-20 17:13:14,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 17:13:14,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-07-20 17:13:14,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 17:13:14,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-07-20 17:13:14,502 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 16 [2020-07-20 17:13:14,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:13:14,502 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-07-20 17:13:14,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:13:14,503 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-07-20 17:13:14,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 17:13:14,504 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:13:14,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:13:14,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:13:14,719 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:13:14,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:13:14,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1721544590, now seen corresponding path program 1 times [2020-07-20 17:13:14,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:13:14,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331416831] [2020-07-20 17:13:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:13:14,821 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 17:13:14,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:13:14,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 17:13:14,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:13:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:13:14,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:13:14,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331416831] [2020-07-20 17:13:14,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:13:14,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:13:14,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813333029] [2020-07-20 17:13:14,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:13:14,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:13:14,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:13:14,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:13:14,877 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2020-07-20 17:13:14,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:13:14,963 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2020-07-20 17:13:14,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:13:14,963 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-07-20 17:13:14,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:13:14,965 INFO L225 Difference]: With dead ends: 59 [2020-07-20 17:13:14,965 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 17:13:14,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:13:14,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 17:13:14,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2020-07-20 17:13:14,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 17:13:14,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-07-20 17:13:14,975 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 20 [2020-07-20 17:13:14,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:13:14,976 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-07-20 17:13:14,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:13:14,976 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-07-20 17:13:14,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 17:13:14,977 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:13:14,978 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, 1, 1, 1, 1, 1] [2020-07-20 17:13:15,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:13:15,191 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:13:15,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:13:15,191 INFO L82 PathProgramCache]: Analyzing trace with hash 777953469, now seen corresponding path program 1 times [2020-07-20 17:13:15,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:13:15,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737880240] [2020-07-20 17:13:15,193 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:13:15,322 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:13:15,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:13:15,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 17:13:15,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:13:15,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 17:13:15,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:13:15,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737880240] [2020-07-20 17:13:15,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:13:15,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:13:15,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412687446] [2020-07-20 17:13:15,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:13:15,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:13:15,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:13:15,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:13:15,363 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 4 states. [2020-07-20 17:13:15,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:13:15,433 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2020-07-20 17:13:15,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:13:15,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-07-20 17:13:15,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:13:15,438 INFO L225 Difference]: With dead ends: 53 [2020-07-20 17:13:15,438 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 17:13:15,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:13:15,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 17:13:15,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-07-20 17:13:15,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 17:13:15,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-07-20 17:13:15,449 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 26 [2020-07-20 17:13:15,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:13:15,450 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-07-20 17:13:15,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:13:15,450 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-07-20 17:13:15,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 17:13:15,451 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:13:15,452 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] [2020-07-20 17:13:15,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:13:15,666 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:13:15,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:13:15,667 INFO L82 PathProgramCache]: Analyzing trace with hash -743556192, now seen corresponding path program 1 times [2020-07-20 17:13:15,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:13:15,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474322707] [2020-07-20 17:13:15,668 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:13:15,869 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:13:15,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 17:13:15,870 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:13:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 17:13:15,940 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:13:15,982 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 17:13:15,983 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:13:16,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:13:16,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:13:16 BoogieIcfgContainer [2020-07-20 17:13:16,250 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:13:16,254 INFO L168 Benchmark]: Toolchain (without parser) took 4050.43 ms. Allocated memory was 137.4 MB in the beginning and 252.7 MB in the end (delta: 115.3 MB). Free memory was 101.7 MB in the beginning and 214.4 MB in the end (delta: -112.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:13:16,255 INFO L168 Benchmark]: CDTParser took 0.67 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 17:13:16,256 INFO L168 Benchmark]: CACSL2BoogieTranslator took 783.94 ms. Allocated memory was 137.4 MB in the beginning and 202.9 MB in the end (delta: 65.5 MB). Free memory was 101.3 MB in the beginning and 169.8 MB in the end (delta: -68.5 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2020-07-20 17:13:16,257 INFO L168 Benchmark]: Boogie Preprocessor took 99.23 ms. Allocated memory is still 202.9 MB. Free memory was 169.8 MB in the beginning and 166.3 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 7.1 GB. [2020-07-20 17:13:16,257 INFO L168 Benchmark]: RCFGBuilder took 755.56 ms. Allocated memory is still 202.9 MB. Free memory was 166.3 MB in the beginning and 120.4 MB in the end (delta: 45.9 MB). Peak memory consumption was 45.9 MB. Max. memory is 7.1 GB. [2020-07-20 17:13:16,258 INFO L168 Benchmark]: TraceAbstraction took 2404.07 ms. Allocated memory was 202.9 MB in the beginning and 252.7 MB in the end (delta: 49.8 MB). Free memory was 119.7 MB in the beginning and 214.4 MB in the end (delta: -94.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 17:13:16,263 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.67 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 783.94 ms. Allocated memory was 137.4 MB in the beginning and 202.9 MB in the end (delta: 65.5 MB). Free memory was 101.3 MB in the beginning and 169.8 MB in the end (delta: -68.5 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 99.23 ms. Allocated memory is still 202.9 MB. Free memory was 169.8 MB in the beginning and 166.3 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 755.56 ms. Allocated memory is still 202.9 MB. Free memory was 166.3 MB in the beginning and 120.4 MB in the end (delta: 45.9 MB). Peak memory consumption was 45.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2404.07 ms. Allocated memory was 202.9 MB in the beginning and 252.7 MB in the end (delta: 49.8 MB). Free memory was 119.7 MB in the beginning and 214.4 MB in the end (delta: -94.7 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))={18588:0}, p={-1:0}, t={18588:0}] [L539] COND FALSE !(t == 0) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={18588:0}, p={-1:0}, t={18588:0}] [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))={18588:0}, p={18588:0}, t={18588:0}] [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))={18588:0}, p={-1:0}, t={18588:0}] [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))={18588:0}, p={-1:0}, p->h=1, t={18588:0}] [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))={18588:0}, p={18588:0}, 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))={18588:0}, p={18588:0}, 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))={18588:0}, 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))={18588:0}, 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))={18588:0}, 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: 2.2s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 102 SDtfs, 33 SDslu, 159 SDs, 0 SdLazy, 69 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 53 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, 14 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 89 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 59 ConstructedInterpolants, 0 QuantifiedInterpolants, 2761 SizeOfPredicates, 13 NumberOfNonLiveVariables, 186 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...