/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:50:26,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:50:26,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:50:26,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:50:26,689 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:50:26,691 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:50:26,693 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:50:26,708 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:50:26,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:50:26,712 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:50:26,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:50:26,716 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:50:26,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:50:26,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:50:26,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:50:26,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:50:26,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:50:26,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:50:26,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:50:26,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:50:26,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:50:26,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:50:26,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:50:26,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:50:26,743 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 13:50:26,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 13:50:26,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 13:50:26,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 13:50:26,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 13:50:26,747 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 13:50:26,748 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 13:50:26,749 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 13:50:26,750 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 13:50:26,751 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 13:50:26,753 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 13:50:26,753 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 13:50:26,754 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 13:50:26,754 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 13:50:26,755 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:50:26,756 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:50:26,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:50:26,758 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 13:50:26,775 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:50:26,776 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:50:26,778 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:50:26,779 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:50:26,779 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:50:26,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:50:26,779 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:50:26,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:50:26,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:50:26,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:50:26,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:50:26,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:50:26,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:50:26,781 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:50:26,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:50:26,781 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:50:26,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:50:26,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:50:26,782 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:50:26,782 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:50:26,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:50:26,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:50:26,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:50:26,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:50:26,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:50:26,784 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:50:26,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:26,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:50:26,785 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:50:26,785 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 13:50:27,165 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:50:27,179 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:50:27,183 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:50:27,185 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:50:27,186 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:50:27,187 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-07-20 13:50:27,276 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c60f97e8b/82a3b86bda30498cb121f84fefcb96d1/FLAG45787ea46 [2020-07-20 13:50:27,923 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:50:27,924 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-07-20 13:50:27,941 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c60f97e8b/82a3b86bda30498cb121f84fefcb96d1/FLAG45787ea46 [2020-07-20 13:50:28,158 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c60f97e8b/82a3b86bda30498cb121f84fefcb96d1 [2020-07-20 13:50:28,169 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:50:28,173 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:50:28,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:50:28,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:50:28,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:50:28,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:50:28" (1/1) ... [2020-07-20 13:50:28,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cfdd2ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:28, skipping insertion in model container [2020-07-20 13:50:28,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:50:28" (1/1) ... [2020-07-20 13:50:28,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:50:28,252 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:50:28,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:50:28,892 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:50:28,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:50:29,028 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:50:29,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:29 WrapperNode [2020-07-20 13:50:29,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:50:29,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:50:29,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:50:29,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:50:29,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:29" (1/1) ... [2020-07-20 13:50:29,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:29" (1/1) ... [2020-07-20 13:50:29,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:29" (1/1) ... [2020-07-20 13:50:29,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:29" (1/1) ... [2020-07-20 13:50:29,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:29" (1/1) ... [2020-07-20 13:50:29,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:29" (1/1) ... [2020-07-20 13:50:29,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:29" (1/1) ... [2020-07-20 13:50:29,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:50:29,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:50:29,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:50:29,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:50:29,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:50:29,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:50:29,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:50:29,253 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 13:50:29,253 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 13:50:29,253 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-07-20 13:50:29,254 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2020-07-20 13:50:29,254 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2020-07-20 13:50:29,254 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2020-07-20 13:50:29,254 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2020-07-20 13:50:29,255 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2020-07-20 13:50:29,255 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:50:29,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:50:29,255 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 13:50:29,256 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 13:50:29,256 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 13:50:29,256 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 13:50:29,256 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 13:50:29,256 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 13:50:29,257 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 13:50:29,257 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 13:50:29,257 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 13:50:29,257 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 13:50:29,257 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 13:50:29,258 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 13:50:29,258 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 13:50:29,258 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 13:50:29,258 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 13:50:29,258 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 13:50:29,258 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 13:50:29,259 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 13:50:29,259 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 13:50:29,259 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 13:50:29,259 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 13:50:29,259 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 13:50:29,259 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 13:50:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 13:50:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 13:50:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 13:50:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 13:50:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 13:50:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 13:50:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 13:50:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 13:50:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 13:50:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 13:50:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 13:50:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 13:50:29,262 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 13:50:29,262 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 13:50:29,262 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 13:50:29,262 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 13:50:29,262 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 13:50:29,262 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 13:50:29,263 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 13:50:29,263 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 13:50:29,263 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 13:50:29,263 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 13:50:29,263 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 13:50:29,264 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 13:50:29,264 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 13:50:29,264 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 13:50:29,264 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 13:50:29,264 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 13:50:29,264 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 13:50:29,265 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 13:50:29,265 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 13:50:29,265 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 13:50:29,265 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 13:50:29,265 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 13:50:29,265 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 13:50:29,266 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 13:50:29,266 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 13:50:29,266 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 13:50:29,266 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 13:50:29,266 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 13:50:29,267 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 13:50:29,267 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 13:50:29,267 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 13:50:29,267 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 13:50:29,267 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 13:50:29,268 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 13:50:29,268 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 13:50:29,268 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 13:50:29,268 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 13:50:29,268 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 13:50:29,268 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 13:50:29,269 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 13:50:29,269 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 13:50:29,269 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 13:50:29,269 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 13:50:29,269 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 13:50:29,269 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 13:50:29,270 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 13:50:29,270 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 13:50:29,270 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 13:50:29,270 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 13:50:29,270 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 13:50:29,270 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 13:50:29,271 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 13:50:29,271 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 13:50:29,271 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 13:50:29,271 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 13:50:29,271 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 13:50:29,271 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 13:50:29,271 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 13:50:29,272 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 13:50:29,272 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 13:50:29,272 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 13:50:29,272 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 13:50:29,272 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 13:50:29,272 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 13:50:29,273 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 13:50:29,273 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 13:50:29,273 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 13:50:29,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:50:29,273 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-07-20 13:50:29,273 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2020-07-20 13:50:29,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 13:50:29,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 13:50:29,274 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2020-07-20 13:50:29,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 13:50:29,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 13:50:29,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 13:50:29,275 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2020-07-20 13:50:29,275 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2020-07-20 13:50:29,275 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2020-07-20 13:50:29,275 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:50:29,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 13:50:29,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 13:50:29,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:50:29,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:50:30,314 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:50:30,315 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-07-20 13:50:30,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:50:30 BoogieIcfgContainer [2020-07-20 13:50:30,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:50:30,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:50:30,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:50:30,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:50:30,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:50:28" (1/3) ... [2020-07-20 13:50:30,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b30a73f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:50:30, skipping insertion in model container [2020-07-20 13:50:30,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:29" (2/3) ... [2020-07-20 13:50:30,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b30a73f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:50:30, skipping insertion in model container [2020-07-20 13:50:30,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:50:30" (3/3) ... [2020-07-20 13:50:30,334 INFO L109 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2020-07-20 13:50:30,350 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:50:30,362 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:50:30,385 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:50:30,428 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:50:30,429 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:50:30,429 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:50:30,429 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:50:30,430 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:50:30,430 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:50:30,430 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:50:30,430 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:50:30,465 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-07-20 13:50:30,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 13:50:30,477 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:30,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:30,480 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:30,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:30,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1873878464, now seen corresponding path program 1 times [2020-07-20 13:50:30,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:30,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588900582] [2020-07-20 13:50:30,507 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:30,786 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 13:50:30,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:30,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 13:50:30,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:30,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:30,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:30,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588900582] [2020-07-20 13:50:30,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:30,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:30,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346797095] [2020-07-20 13:50:30,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:30,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:30,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:30,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:30,899 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 3 states. [2020-07-20 13:50:31,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:31,070 INFO L93 Difference]: Finished difference Result 231 states and 387 transitions. [2020-07-20 13:50:31,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:31,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-20 13:50:31,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:31,097 INFO L225 Difference]: With dead ends: 231 [2020-07-20 13:50:31,098 INFO L226 Difference]: Without dead ends: 109 [2020-07-20 13:50:31,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:31,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-07-20 13:50:31,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2020-07-20 13:50:31,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-20 13:50:31,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2020-07-20 13:50:31,232 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 13 [2020-07-20 13:50:31,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:31,233 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2020-07-20 13:50:31,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:31,233 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2020-07-20 13:50:31,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 13:50:31,234 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:31,235 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:31,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:31,451 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:31,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:31,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1684995551, now seen corresponding path program 1 times [2020-07-20 13:50:31,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:31,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361671869] [2020-07-20 13:50:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:31,627 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:31,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:31,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 13:50:31,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:31,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:31,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361671869] [2020-07-20 13:50:31,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:31,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 13:50:31,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363413920] [2020-07-20 13:50:31,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 13:50:31,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:31,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 13:50:31,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:50:31,683 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 6 states. [2020-07-20 13:50:31,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:31,961 INFO L93 Difference]: Finished difference Result 151 states and 184 transitions. [2020-07-20 13:50:31,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:50:31,962 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-20 13:50:31,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:31,965 INFO L225 Difference]: With dead ends: 151 [2020-07-20 13:50:31,966 INFO L226 Difference]: Without dead ends: 146 [2020-07-20 13:50:31,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 13:50:31,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-07-20 13:50:32,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 108. [2020-07-20 13:50:32,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-20 13:50:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 131 transitions. [2020-07-20 13:50:32,024 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 131 transitions. Word has length 20 [2020-07-20 13:50:32,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:32,027 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 131 transitions. [2020-07-20 13:50:32,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 13:50:32,027 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 131 transitions. [2020-07-20 13:50:32,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 13:50:32,029 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:32,031 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, 1] [2020-07-20 13:50:32,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:32,246 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:32,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:32,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1145945773, now seen corresponding path program 1 times [2020-07-20 13:50:32,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:32,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218288563] [2020-07-20 13:50:32,249 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:32,514 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:32,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:32,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 13:50:32,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:32,696 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 19 treesize of output 7 [2020-07-20 13:50:32,699 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:32,715 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:32,724 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 19 treesize of output 7 [2020-07-20 13:50:32,728 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:32,734 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:32,735 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:50:32,736 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-07-20 13:50:32,757 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 13:50:32,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:32,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218288563] [2020-07-20 13:50:32,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:32,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:50:32,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694650415] [2020-07-20 13:50:32,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:50:32,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:32,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:50:32,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:50:32,773 INFO L87 Difference]: Start difference. First operand 108 states and 131 transitions. Second operand 5 states. [2020-07-20 13:50:33,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:33,015 INFO L93 Difference]: Finished difference Result 110 states and 132 transitions. [2020-07-20 13:50:33,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:50:33,016 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-07-20 13:50:33,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:33,018 INFO L225 Difference]: With dead ends: 110 [2020-07-20 13:50:33,019 INFO L226 Difference]: Without dead ends: 107 [2020-07-20 13:50:33,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:50:33,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-20 13:50:33,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-07-20 13:50:33,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-20 13:50:33,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2020-07-20 13:50:33,035 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 27 [2020-07-20 13:50:33,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:33,036 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2020-07-20 13:50:33,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:50:33,036 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2020-07-20 13:50:33,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 13:50:33,037 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:33,037 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, 1] [2020-07-20 13:50:33,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:33,251 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:33,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:33,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1471361763, now seen corresponding path program 1 times [2020-07-20 13:50:33,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:33,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626695229] [2020-07-20 13:50:33,252 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:33,419 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:33,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:33,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 13:50:33,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:33,457 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 13:50:33,473 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 9 treesize of output 3 [2020-07-20 13:50:33,474 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:33,480 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 20 treesize of output 8 [2020-07-20 13:50:33,481 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:33,504 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:33,511 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 20 treesize of output 8 [2020-07-20 13:50:33,512 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:33,517 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 9 treesize of output 3 [2020-07-20 13:50:33,518 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:33,525 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:33,526 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-20 13:50:33,526 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:59, output treesize:9 [2020-07-20 13:50:33,541 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 13:50:33,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:33,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626695229] [2020-07-20 13:50:33,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:33,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:50:33,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34209088] [2020-07-20 13:50:33,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:50:33,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:33,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:50:33,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:50:33,544 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand 5 states. [2020-07-20 13:50:33,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:33,755 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2020-07-20 13:50:33,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:50:33,756 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-07-20 13:50:33,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:33,758 INFO L225 Difference]: With dead ends: 109 [2020-07-20 13:50:33,758 INFO L226 Difference]: Without dead ends: 106 [2020-07-20 13:50:33,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:50:33,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-07-20 13:50:33,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-07-20 13:50:33,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-20 13:50:33,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2020-07-20 13:50:33,782 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 27 [2020-07-20 13:50:33,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:33,783 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2020-07-20 13:50:33,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:50:33,783 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2020-07-20 13:50:33,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 13:50:33,784 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:33,785 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, 1, 1, 1, 1] [2020-07-20 13:50:33,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:34,000 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:34,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:34,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1648323131, now seen corresponding path program 1 times [2020-07-20 13:50:34,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:34,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164760240] [2020-07-20 13:50:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:34,134 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:34,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:34,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 13:50:34,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:34,184 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2020-07-20 13:50:34,184 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:34,192 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:34,194 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:50:34,195 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:12 [2020-07-20 13:50:34,268 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 16 treesize of output 8 [2020-07-20 13:50:34,269 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:34,272 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:34,273 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:50:34,273 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2020-07-20 13:50:34,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:34,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:34,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164760240] [2020-07-20 13:50:34,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:34,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 13:50:34,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125370583] [2020-07-20 13:50:34,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 13:50:34,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:34,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 13:50:34,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-20 13:50:34,321 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand 9 states. [2020-07-20 13:50:34,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:34,776 INFO L93 Difference]: Finished difference Result 143 states and 169 transitions. [2020-07-20 13:50:34,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:50:34,778 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-07-20 13:50:34,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:34,780 INFO L225 Difference]: With dead ends: 143 [2020-07-20 13:50:34,780 INFO L226 Difference]: Without dead ends: 140 [2020-07-20 13:50:34,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-07-20 13:50:34,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-20 13:50:34,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 112. [2020-07-20 13:50:34,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-20 13:50:34,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2020-07-20 13:50:34,795 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 30 [2020-07-20 13:50:34,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:34,796 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2020-07-20 13:50:34,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 13:50:34,796 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2020-07-20 13:50:34,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 13:50:34,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:34,797 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, 1, 1, 1, 1] [2020-07-20 13:50:35,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:35,012 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:35,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:35,013 INFO L82 PathProgramCache]: Analyzing trace with hash 861386650, now seen corresponding path program 1 times [2020-07-20 13:50:35,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:35,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939880287] [2020-07-20 13:50:35,014 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:35,160 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:35,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:35,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 13:50:35,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:35,203 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2020-07-20 13:50:35,204 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:35,219 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:35,221 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:50:35,222 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:12 [2020-07-20 13:50:35,265 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 16 treesize of output 8 [2020-07-20 13:50:35,266 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:35,269 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:35,270 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:50:35,271 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2020-07-20 13:50:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:35,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:35,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939880287] [2020-07-20 13:50:35,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:35,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 13:50:35,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311181790] [2020-07-20 13:50:35,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 13:50:35,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:35,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 13:50:35,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-20 13:50:35,287 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand 9 states. [2020-07-20 13:50:35,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:35,705 INFO L93 Difference]: Finished difference Result 142 states and 167 transitions. [2020-07-20 13:50:35,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:50:35,707 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-07-20 13:50:35,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:35,708 INFO L225 Difference]: With dead ends: 142 [2020-07-20 13:50:35,708 INFO L226 Difference]: Without dead ends: 139 [2020-07-20 13:50:35,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-07-20 13:50:35,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-07-20 13:50:35,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 118. [2020-07-20 13:50:35,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-07-20 13:50:35,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2020-07-20 13:50:35,722 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 30 [2020-07-20 13:50:35,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:35,722 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2020-07-20 13:50:35,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 13:50:35,722 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2020-07-20 13:50:35,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 13:50:35,723 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:35,724 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, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:35,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:35,932 INFO L427 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:35,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:35,933 INFO L82 PathProgramCache]: Analyzing trace with hash 671486784, now seen corresponding path program 1 times [2020-07-20 13:50:35,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:35,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530552429] [2020-07-20 13:50:35,934 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:36,105 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:50:36,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 13:50:36,106 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:50:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 13:50:36,140 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:50:36,195 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 13:50:36,195 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 13:50:36,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:36,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:50:36 BoogieIcfgContainer [2020-07-20 13:50:36,451 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:50:36,453 INFO L168 Benchmark]: Toolchain (without parser) took 8282.45 ms. Allocated memory was 143.7 MB in the beginning and 293.6 MB in the end (delta: 149.9 MB). Free memory was 99.7 MB in the beginning and 221.7 MB in the end (delta: -122.0 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:36,454 INFO L168 Benchmark]: CDTParser took 0.47 ms. Allocated memory is still 143.7 MB. Free memory is still 119.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 13:50:36,455 INFO L168 Benchmark]: CACSL2BoogieTranslator took 855.10 ms. Allocated memory was 143.7 MB in the beginning and 202.4 MB in the end (delta: 58.7 MB). Free memory was 99.7 MB in the beginning and 166.4 MB in the end (delta: -66.8 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:36,456 INFO L168 Benchmark]: Boogie Preprocessor took 133.41 ms. Allocated memory is still 202.4 MB. Free memory was 166.4 MB in the beginning and 163.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:36,456 INFO L168 Benchmark]: RCFGBuilder took 1157.34 ms. Allocated memory is still 202.4 MB. Free memory was 163.4 MB in the beginning and 93.6 MB in the end (delta: 69.8 MB). Peak memory consumption was 69.8 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:36,457 INFO L168 Benchmark]: TraceAbstraction took 6128.32 ms. Allocated memory was 202.4 MB in the beginning and 293.6 MB in the end (delta: 91.2 MB). Free memory was 93.6 MB in the beginning and 221.7 MB in the end (delta: -128.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 13:50:36,461 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47 ms. Allocated memory is still 143.7 MB. Free memory is still 119.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 855.10 ms. Allocated memory was 143.7 MB in the beginning and 202.4 MB in the end (delta: 58.7 MB). Free memory was 99.7 MB in the beginning and 166.4 MB in the end (delta: -66.8 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.41 ms. Allocated memory is still 202.4 MB. Free memory was 166.4 MB in the beginning and 163.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1157.34 ms. Allocated memory is still 202.4 MB. Free memory was 163.4 MB in the beginning and 93.6 MB in the end (delta: 69.8 MB). Peak memory consumption was 69.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6128.32 ms. Allocated memory was 202.4 MB in the beginning and 293.6 MB in the end (delta: 91.2 MB). Free memory was 93.6 MB in the beginning and 221.7 MB in the end (delta: -128.1 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 554]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L627] struct list *data = ((void *)0); VAL [data={0:0}] [L628] COND TRUE __VERIFIER_nondet_int() [L629] struct node *node = malloc(sizeof *node); VAL [data={0:0}, malloc(sizeof *node)={-2:0}, node={-2:0}] [L630] COND FALSE !(!node) VAL [data={0:0}, malloc(sizeof *node)={-2:0}, node={-2:0}] [L632] node->next = node [L633] node->value = __VERIFIER_nondet_int() [L634] struct list *item = malloc(sizeof *item); VAL [data={0:0}, item={-1:0}, malloc(sizeof *item)={-1:0}, malloc(sizeof *node)={-2:0}, node={-2:0}] [L635] COND FALSE !(!item) VAL [data={0:0}, item={-1:0}, malloc(sizeof *item)={-1:0}, malloc(sizeof *node)={-2:0}, node={-2:0}] [L637] item->slist = node [L638] item->next = data [L639] data = item VAL [data={-1:0}, item={-1:0}, malloc(sizeof *item)={-1:0}, malloc(sizeof *node)={-2:0}, node={-2:0}] [L628] COND FALSE !(__VERIFIER_nondet_int()) [L641] COND FALSE !(!data) VAL [data={-1:0}, item={-1:0}, malloc(sizeof *item)={-1:0}, malloc(sizeof *node)={-2:0}, node={-2:0}] [L643] CALL inspect_before(data) VAL [shape={-1:0}] [L604] COND FALSE !(!(shape)) VAL [shape={-1:0}, shape={-1:0}] [L605] shape->next VAL [shape={-1:0}, shape={-1:0}, shape->next={0:0}] [L605] COND FALSE !(shape->next) [L611] COND FALSE !(!(shape)) VAL [shape={-1:0}, shape={-1:0}] [L612] EXPR shape->next VAL [shape={-1:0}, shape={-1:0}, shape->next={0:0}] [L612] COND FALSE !(!(shape->next == ((void *)0))) [L613] EXPR shape->slist VAL [shape={-1:0}, shape={-1:0}, shape->slist={-2:0}] [L613] COND FALSE !(!(shape->slist)) [L614] EXPR shape->slist [L614] EXPR shape->slist->next VAL [shape={-1:0}, shape={-1:0}, shape->slist={-2:0}, shape->slist->next={-2:0}] [L614] COND TRUE !(shape->slist->next == ((void *)0)) [L614] CALL fail() [L554] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 121 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.9s, OverallIterations: 7, TraceHistogramMax: 2, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 679 SDtfs, 414 SDslu, 2040 SDs, 0 SdLazy, 674 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 158 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred in iteration=6, 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, 6 MinimizatonAttempts, 91 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 180 NumberOfCodeBlocks, 142 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 141 ConstructedInterpolants, 0 QuantifiedInterpolants, 19249 SizeOfPredicates, 36 NumberOfNonLiveVariables, 525 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 10/10 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...