/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:16:55,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:16:55,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:16:55,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:16:55,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:16:55,118 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:16:55,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:16:55,124 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:16:55,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:16:55,131 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:16:55,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:16:55,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:16:55,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:16:55,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:16:55,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:16:55,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:16:55,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:16:55,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:16:55,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:16:55,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:16:55,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:16:55,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:16:55,154 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:16:55,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:16:55,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 16:16:55,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 16:16:55,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 16:16:55,161 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 16:16:55,161 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 16:16:55,162 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 16:16:55,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 16:16:55,164 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 16:16:55,165 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 16:16:55,167 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 16:16:55,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 16:16:55,171 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 16:16:55,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 16:16:55,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 16:16:55,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:16:55,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:16:55,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:16:55,175 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 16:16:55,197 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:16:55,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:16:55,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:16:55,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:16:55,200 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:16:55,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:16:55,201 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:16:55,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:16:55,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:16:55,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:16:55,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:16:55,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:16:55,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:16:55,203 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:16:55,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:16:55,203 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:16:55,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:16:55,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:16:55,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:16:55,204 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:16:55,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:16:55,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:16:55,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:16:55,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:16:55,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:16:55,205 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:16:55,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:16:55,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:16:55,206 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:16:55,206 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 16:16:55,488 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:16:55,504 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:16:55,508 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:16:55,511 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:16:55,511 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:16:55,512 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-07-21 16:16:55,588 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cd2f2758/e96f42bda79c49e6ac629d11dd3729c8/FLAG9822cc09c [2020-07-21 16:16:56,150 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:16:56,150 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-07-21 16:16:56,164 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cd2f2758/e96f42bda79c49e6ac629d11dd3729c8/FLAG9822cc09c [2020-07-21 16:16:56,380 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cd2f2758/e96f42bda79c49e6ac629d11dd3729c8 [2020-07-21 16:16:56,388 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:16:56,391 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:16:56,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:16:56,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:16:56,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:16:56,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:16:56" (1/1) ... [2020-07-21 16:16:56,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2efca680 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:16:56, skipping insertion in model container [2020-07-21 16:16:56,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:16:56" (1/1) ... [2020-07-21 16:16:56,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:16:56,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:16:56,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:16:56,969 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:16:57,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:16:57,086 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:16:57,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:16:57 WrapperNode [2020-07-21 16:16:57,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:16:57,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:16:57,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:16:57,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:16:57,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:16:57" (1/1) ... [2020-07-21 16:16:57,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:16:57" (1/1) ... [2020-07-21 16:16:57,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:16:57" (1/1) ... [2020-07-21 16:16:57,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:16:57" (1/1) ... [2020-07-21 16:16:57,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:16:57" (1/1) ... [2020-07-21 16:16:57,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:16:57" (1/1) ... [2020-07-21 16:16:57,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:16:57" (1/1) ... [2020-07-21 16:16:57,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:16:57,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:16:57,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:16:57,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:16:57,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:16:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:16:57,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:16:57,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:16:57,253 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-21 16:16:57,253 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-21 16:16:57,253 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-07-21 16:16:57,254 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2020-07-21 16:16:57,254 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2020-07-21 16:16:57,254 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2020-07-21 16:16:57,254 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2020-07-21 16:16:57,254 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2020-07-21 16:16:57,255 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:16:57,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:16:57,255 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-21 16:16:57,255 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-21 16:16:57,256 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 16:16:57,257 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 16:16:57,257 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 16:16:57,257 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 16:16:57,257 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 16:16:57,257 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 16:16:57,258 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 16:16:57,258 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 16:16:57,258 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 16:16:57,258 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 16:16:57,259 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 16:16:57,260 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 16:16:57,260 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 16:16:57,260 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 16:16:57,260 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 16:16:57,260 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 16:16:57,260 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 16:16:57,260 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 16:16:57,261 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 16:16:57,261 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 16:16:57,261 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 16:16:57,261 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 16:16:57,261 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 16:16:57,261 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 16:16:57,261 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 16:16:57,261 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 16:16:57,262 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 16:16:57,262 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 16:16:57,262 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 16:16:57,262 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 16:16:57,262 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 16:16:57,262 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 16:16:57,262 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 16:16:57,263 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 16:16:57,263 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 16:16:57,263 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 16:16:57,263 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 16:16:57,264 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 16:16:57,264 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 16:16:57,264 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 16:16:57,264 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 16:16:57,264 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 16:16:57,264 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 16:16:57,264 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 16:16:57,265 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 16:16:57,265 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 16:16:57,265 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 16:16:57,265 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 16:16:57,265 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 16:16:57,265 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 16:16:57,265 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 16:16:57,265 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 16:16:57,266 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 16:16:57,266 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 16:16:57,266 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 16:16:57,266 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 16:16:57,266 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 16:16:57,267 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 16:16:57,267 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:16:57,267 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 16:16:57,267 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 16:16:57,268 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 16:16:57,268 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 16:16:57,268 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 16:16:57,269 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 16:16:57,269 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 16:16:57,269 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 16:16:57,269 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 16:16:57,270 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 16:16:57,270 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 16:16:57,270 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 16:16:57,270 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 16:16:57,270 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 16:16:57,270 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 16:16:57,270 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 16:16:57,270 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 16:16:57,270 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 16:16:57,270 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 16:16:57,270 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 16:16:57,271 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 16:16:57,271 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 16:16:57,271 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 16:16:57,271 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 16:16:57,271 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 16:16:57,271 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 16:16:57,271 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 16:16:57,271 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 16:16:57,271 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 16:16:57,271 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 16:16:57,272 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 16:16:57,272 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 16:16:57,272 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 16:16:57,272 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 16:16:57,272 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 16:16:57,272 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 16:16:57,272 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 16:16:57,272 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 16:16:57,272 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 16:16:57,272 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 16:16:57,272 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 16:16:57,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:16:57,273 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-07-21 16:16:57,273 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2020-07-21 16:16:57,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 16:16:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 16:16:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2020-07-21 16:16:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 16:16:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 16:16:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:16:57,275 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2020-07-21 16:16:57,275 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2020-07-21 16:16:57,275 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2020-07-21 16:16:57,275 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:16:57,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 16:16:57,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 16:16:57,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:16:57,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:16:58,033 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:16:58,034 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-07-21 16:16:58,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:16:58 BoogieIcfgContainer [2020-07-21 16:16:58,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:16:58,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:16:58,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:16:58,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:16:58,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:16:56" (1/3) ... [2020-07-21 16:16:58,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f5350c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:16:58, skipping insertion in model container [2020-07-21 16:16:58,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:16:57" (2/3) ... [2020-07-21 16:16:58,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f5350c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:16:58, skipping insertion in model container [2020-07-21 16:16:58,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:16:58" (3/3) ... [2020-07-21 16:16:58,047 INFO L109 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2020-07-21 16:16:58,058 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:16:58,067 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:16:58,081 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:16:58,106 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:16:58,106 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:16:58,107 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:16:58,107 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:16:58,107 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:16:58,107 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:16:58,108 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:16:58,108 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:16:58,132 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-07-21 16:16:58,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 16:16:58,138 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:16:58,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:16:58,140 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:16:58,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:16:58,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1873878464, now seen corresponding path program 1 times [2020-07-21 16:16:58,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:16:58,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934727849] [2020-07-21 16:16:58,171 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:16:58,345 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:16:58,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:16:58,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 16:16:58,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:16:58,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:16:58,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:16:58,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934727849] [2020-07-21 16:16:58,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:16:58,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:16:58,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14769269] [2020-07-21 16:16:58,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:16:58,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:16:58,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:16:58,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:16:58,435 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 3 states. [2020-07-21 16:16:58,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:16:58,530 INFO L93 Difference]: Finished difference Result 231 states and 387 transitions. [2020-07-21 16:16:58,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:16:58,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-21 16:16:58,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:16:58,544 INFO L225 Difference]: With dead ends: 231 [2020-07-21 16:16:58,544 INFO L226 Difference]: Without dead ends: 109 [2020-07-21 16:16:58,549 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 [2020-07-21 16:16:58,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-07-21 16:16:58,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2020-07-21 16:16:58,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-21 16:16:58,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2020-07-21 16:16:58,597 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 13 [2020-07-21 16:16:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:16:58,597 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2020-07-21 16:16:58,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:16:58,597 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2020-07-21 16:16:58,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 16:16:58,598 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:16:58,599 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:16:58,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:16:58,813 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:16:58,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:16:58,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1684995551, now seen corresponding path program 1 times [2020-07-21 16:16:58,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:16:58,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244228237] [2020-07-21 16:16:58,815 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:16:58,942 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:16:58,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:16:58,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 16:16:58,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:16:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:16:58,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:16:58,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244228237] [2020-07-21 16:16:58,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:16:58,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 16:16:58,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203187910] [2020-07-21 16:16:58,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 16:16:58,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:16:58,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 16:16:58,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:16:58,999 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 6 states. [2020-07-21 16:16:59,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:16:59,206 INFO L93 Difference]: Finished difference Result 151 states and 184 transitions. [2020-07-21 16:16:59,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 16:16:59,207 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-21 16:16:59,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:16:59,212 INFO L225 Difference]: With dead ends: 151 [2020-07-21 16:16:59,213 INFO L226 Difference]: Without dead ends: 146 [2020-07-21 16:16:59,214 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 [2020-07-21 16:16:59,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-07-21 16:16:59,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 108. [2020-07-21 16:16:59,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-21 16:16:59,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 131 transitions. [2020-07-21 16:16:59,253 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 131 transitions. Word has length 20 [2020-07-21 16:16:59,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:16:59,253 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 131 transitions. [2020-07-21 16:16:59,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 16:16:59,254 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 131 transitions. [2020-07-21 16:16:59,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 16:16:59,256 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:16:59,256 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] [2020-07-21 16:16:59,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:16:59,470 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:16:59,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:16:59,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1145945773, now seen corresponding path program 1 times [2020-07-21 16:16:59,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:16:59,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673516771] [2020-07-21 16:16:59,472 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:16:59,622 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:16:59,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:16:59,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-21 16:16:59,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:16:59,709 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2020-07-21 16:16:59,709 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:16:59,723 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:16:59,725 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:16:59,725 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:11 [2020-07-21 16:16:59,823 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 16:16:59,824 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:16:59,833 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:16:59,837 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 22 treesize of output 10 [2020-07-21 16:16:59,838 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:16:59,845 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:16:59,845 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:16:59,846 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:10 [2020-07-21 16:16:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:16:59,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:16:59,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673516771] [2020-07-21 16:16:59,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:16:59,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-21 16:16:59,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397217245] [2020-07-21 16:16:59,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 16:16:59,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:16:59,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 16:16:59,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-21 16:16:59,872 INFO L87 Difference]: Start difference. First operand 108 states and 131 transitions. Second operand 10 states. [2020-07-21 16:17:00,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:17:00,239 INFO L93 Difference]: Finished difference Result 146 states and 176 transitions. [2020-07-21 16:17:00,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:17:00,239 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 16:17:00,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:17:00,241 INFO L225 Difference]: With dead ends: 146 [2020-07-21 16:17:00,241 INFO L226 Difference]: Without dead ends: 143 [2020-07-21 16:17:00,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-07-21 16:17:00,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-07-21 16:17:00,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2020-07-21 16:17:00,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-07-21 16:17:00,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2020-07-21 16:17:00,254 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 27 [2020-07-21 16:17:00,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:17:00,254 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2020-07-21 16:17:00,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 16:17:00,254 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2020-07-21 16:17:00,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 16:17:00,255 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:17:00,255 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] [2020-07-21 16:17:00,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:17:00,469 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:17:00,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:17:00,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1471361763, now seen corresponding path program 1 times [2020-07-21 16:17:00,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:17:00,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822216888] [2020-07-21 16:17:00,471 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:17:00,568 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:17:00,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:17:00,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 16:17:00,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:17:00,607 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2020-07-21 16:17:00,608 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:00,616 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:00,620 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2020-07-21 16:17:00,620 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:00,629 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:00,630 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:17:00,631 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:32, output treesize:18 [2020-07-21 16:17:00,671 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 16:17:00,672 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:00,678 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:00,680 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 16:17:00,681 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:00,685 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:00,685 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:17:00,685 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-07-21 16:17:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:17:00,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:17:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:17:00,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822216888] [2020-07-21 16:17:00,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:17:00,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-21 16:17:00,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155782334] [2020-07-21 16:17:00,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 16:17:00,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:17:00,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 16:17:00,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-07-21 16:17:00,788 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand 11 states. [2020-07-21 16:17:01,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:17:01,106 INFO L93 Difference]: Finished difference Result 231 states and 281 transitions. [2020-07-21 16:17:01,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 16:17:01,106 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-07-21 16:17:01,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:17:01,108 INFO L225 Difference]: With dead ends: 231 [2020-07-21 16:17:01,108 INFO L226 Difference]: Without dead ends: 145 [2020-07-21 16:17:01,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-07-21 16:17:01,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-21 16:17:01,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 137. [2020-07-21 16:17:01,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-21 16:17:01,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 163 transitions. [2020-07-21 16:17:01,134 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 163 transitions. Word has length 27 [2020-07-21 16:17:01,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:17:01,135 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 163 transitions. [2020-07-21 16:17:01,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 16:17:01,135 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 163 transitions. [2020-07-21 16:17:01,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 16:17:01,136 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:17:01,137 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] [2020-07-21 16:17:01,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:17:01,338 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:17:01,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:17:01,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1648323131, now seen corresponding path program 1 times [2020-07-21 16:17:01,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:17:01,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239234617] [2020-07-21 16:17:01,340 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 16:17:01,453 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:17:01,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:17:01,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 16:17:01,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:17:01,481 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 [2020-07-21 16:17:01,482 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:01,489 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:01,490 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:17:01,491 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:12 [2020-07-21 16:17:01,522 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 [2020-07-21 16:17:01,523 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:01,525 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:01,525 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:17:01,526 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2020-07-21 16:17:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:17:01,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:17:01,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239234617] [2020-07-21 16:17:01,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:17:01,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 16:17:01,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698132568] [2020-07-21 16:17:01,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 16:17:01,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:17:01,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 16:17:01,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-21 16:17:01,544 INFO L87 Difference]: Start difference. First operand 137 states and 163 transitions. Second operand 8 states. [2020-07-21 16:17:01,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:17:01,822 INFO L93 Difference]: Finished difference Result 168 states and 200 transitions. [2020-07-21 16:17:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 16:17:01,822 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-07-21 16:17:01,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:17:01,824 INFO L225 Difference]: With dead ends: 168 [2020-07-21 16:17:01,824 INFO L226 Difference]: Without dead ends: 165 [2020-07-21 16:17:01,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-21 16:17:01,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-21 16:17:01,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 140. [2020-07-21 16:17:01,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-21 16:17:01,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 165 transitions. [2020-07-21 16:17:01,840 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 165 transitions. Word has length 30 [2020-07-21 16:17:01,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:17:01,840 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 165 transitions. [2020-07-21 16:17:01,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 16:17:01,841 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 165 transitions. [2020-07-21 16:17:01,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 16:17:01,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:17:01,842 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] [2020-07-21 16:17:02,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:17:02,054 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:17:02,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:17:02,055 INFO L82 PathProgramCache]: Analyzing trace with hash 671486784, now seen corresponding path program 1 times [2020-07-21 16:17:02,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:17:02,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575802297] [2020-07-21 16:17:02,056 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 16:17:02,177 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:17:02,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 16:17:02,178 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:17:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 16:17:02,197 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:17:02,233 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 16:17:02,234 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 16:17:02,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:17:02,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:17:02 BoogieIcfgContainer [2020-07-21 16:17:02,477 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:17:02,479 INFO L168 Benchmark]: Toolchain (without parser) took 6089.04 ms. Allocated memory was 144.2 MB in the beginning and 284.7 MB in the end (delta: 140.5 MB). Free memory was 101.3 MB in the beginning and 213.5 MB in the end (delta: -112.2 MB). Peak memory consumption was 28.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:17:02,480 INFO L168 Benchmark]: CDTParser took 0.49 ms. Allocated memory is still 144.2 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. [2020-07-21 16:17:02,481 INFO L168 Benchmark]: CACSL2BoogieTranslator took 695.52 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 100.9 MB in the beginning and 166.5 MB in the end (delta: -65.6 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. [2020-07-21 16:17:02,481 INFO L168 Benchmark]: Boogie Preprocessor took 97.74 ms. Allocated memory is still 201.3 MB. Free memory was 166.5 MB in the beginning and 162.4 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. [2020-07-21 16:17:02,482 INFO L168 Benchmark]: RCFGBuilder took 852.59 ms. Allocated memory is still 201.3 MB. Free memory was 162.4 MB in the beginning and 94.2 MB in the end (delta: 68.3 MB). Peak memory consumption was 68.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:17:02,483 INFO L168 Benchmark]: TraceAbstraction took 4437.31 ms. Allocated memory was 201.3 MB in the beginning and 284.7 MB in the end (delta: 83.4 MB). Free memory was 93.5 MB in the beginning and 213.5 MB in the end (delta: -120.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 16:17:02,487 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49 ms. Allocated memory is still 144.2 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 695.52 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 100.9 MB in the beginning and 166.5 MB in the end (delta: -65.6 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 97.74 ms. Allocated memory is still 201.3 MB. Free memory was 166.5 MB in the beginning and 162.4 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 852.59 ms. Allocated memory is still 201.3 MB. Free memory was 162.4 MB in the beginning and 94.2 MB in the end (delta: 68.3 MB). Peak memory consumption was 68.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4437.31 ms. Allocated memory was 201.3 MB in the beginning and 284.7 MB in the end (delta: 83.4 MB). Free memory was 93.5 MB in the beginning and 213.5 MB in the end (delta: -120.0 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)={10451:0}, node={10451:0}] [L630] COND FALSE !(!node) VAL [data={0:0}, malloc(sizeof *node)={10451:0}, node={10451:0}] [L632] node->next = node [L633] node->value = __VERIFIER_nondet_int() [L634] struct list *item = malloc(sizeof *item); VAL [data={0:0}, item={10452:0}, malloc(sizeof *item)={10452:0}, malloc(sizeof *node)={10451:0}, node={10451:0}] [L635] COND FALSE !(!item) VAL [data={0:0}, item={10452:0}, malloc(sizeof *item)={10452:0}, malloc(sizeof *node)={10451:0}, node={10451:0}] [L637] item->slist = node [L638] item->next = data [L639] data = item VAL [data={10452:0}, item={10452:0}, malloc(sizeof *item)={10452:0}, malloc(sizeof *node)={10451:0}, node={10451:0}] [L628] COND FALSE !(__VERIFIER_nondet_int()) [L641] COND FALSE !(!data) VAL [data={10452:0}, item={10452:0}, malloc(sizeof *item)={10452:0}, malloc(sizeof *node)={10451:0}, node={10451:0}] [L643] CALL inspect_before(data) VAL [shape={10452:0}] [L604] COND FALSE !(!(shape)) VAL [shape={10452:0}, shape={10452:0}] [L605] shape->next VAL [shape={10452:0}, shape={10452:0}, shape->next={0:0}] [L605] COND FALSE !(shape->next) [L611] COND FALSE !(!(shape)) VAL [shape={10452:0}, shape={10452:0}] [L612] EXPR shape->next VAL [shape={10452:0}, shape={10452:0}, shape->next={0:0}] [L612] COND FALSE !(!(shape->next == ((void *)0))) [L613] EXPR shape->slist VAL [shape={10452:0}, shape={10452:0}, shape->slist={10451:0}] [L613] COND FALSE !(!(shape->slist)) [L614] EXPR shape->slist [L614] EXPR shape->slist->next VAL [shape={10452:0}, shape={10452:0}, shape->slist={10451:0}, shape->slist->next={10451:0}] [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: 4.3s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 579 SDtfs, 424 SDslu, 2073 SDs, 0 SdLazy, 707 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=140occurred in iteration=5, 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, 5 MinimizatonAttempts, 107 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 150 NumberOfCodeBlocks, 131 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 138 ConstructedInterpolants, 0 QuantifiedInterpolants, 24792 SizeOfPredicates, 41 NumberOfNonLiveVariables, 456 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 6/10 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...