/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:12:42,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:12:42,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:12:42,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:12:42,884 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:12:42,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:12:42,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:12:42,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:12:42,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:12:42,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:12:42,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:12:42,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:12:42,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:12:42,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:12:42,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:12:42,908 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:12:42,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:12:42,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:12:42,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:12:42,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:12:42,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:12:42,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:12:42,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:12:42,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:12:42,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 17:12:42,933 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 17:12:42,933 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 17:12:42,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 17:12:42,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 17:12:42,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 17:12:42,938 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 17:12:42,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 17:12:42,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 17:12:42,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 17:12:42,944 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 17:12:42,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 17:12:42,945 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 17:12:42,946 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 17:12:42,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:12:42,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:12:42,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:12:42,954 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 17:12:42,984 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:12:42,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:12:42,991 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:12:42,992 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:12:42,992 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:12:42,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:12:42,993 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:12:42,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:12:42,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:12:42,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:12:42,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:12:42,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:12:42,997 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:12:42,998 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:12:42,998 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:12:42,998 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:12:42,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:12:42,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:12:42,999 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:12:42,999 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:12:43,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:12:43,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:12:43,000 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:12:43,000 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:12:43,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:12:43,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:12:43,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:12:43,003 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:12:43,003 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:12:43,004 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 17:12:43,504 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:12:43,527 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:12:43,533 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:12:43,535 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:12:43,536 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:12:43,538 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-07-20 17:12:43,650 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5bb5a43e/33ccca77ff4c4b73952e2436d0040723/FLAGc4867aca9 [2020-07-20 17:12:44,605 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:12:44,611 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-07-20 17:12:44,635 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5bb5a43e/33ccca77ff4c4b73952e2436d0040723/FLAGc4867aca9 [2020-07-20 17:12:44,797 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5bb5a43e/33ccca77ff4c4b73952e2436d0040723 [2020-07-20 17:12:44,820 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:12:44,827 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:12:44,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:12:44,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:12:44,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:12:44,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:12:44" (1/1) ... [2020-07-20 17:12:44,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@376d1bb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:44, skipping insertion in model container [2020-07-20 17:12:44,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:12:44" (1/1) ... [2020-07-20 17:12:44,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:12:44,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:12:45,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:12:45,665 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:12:45,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:12:45,821 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:12:45,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:45 WrapperNode [2020-07-20 17:12:45,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:12:45,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:12:45,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:12:45,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:12:45,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:45" (1/1) ... [2020-07-20 17:12:45,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:45" (1/1) ... [2020-07-20 17:12:45,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:45" (1/1) ... [2020-07-20 17:12:45,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:45" (1/1) ... [2020-07-20 17:12:45,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:45" (1/1) ... [2020-07-20 17:12:45,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:45" (1/1) ... [2020-07-20 17:12:45,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:45" (1/1) ... [2020-07-20 17:12:45,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:12:45,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:12:45,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:12:45,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:12:45,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:12:46,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:12:46,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:12:46,067 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 17:12:46,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 17:12:46,068 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-07-20 17:12:46,068 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2020-07-20 17:12:46,068 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2020-07-20 17:12:46,069 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2020-07-20 17:12:46,069 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2020-07-20 17:12:46,069 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2020-07-20 17:12:46,069 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:12:46,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:12:46,070 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 17:12:46,070 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 17:12:46,070 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 17:12:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 17:12:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 17:12:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 17:12:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 17:12:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 17:12:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 17:12:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 17:12:46,072 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 17:12:46,072 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 17:12:46,072 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 17:12:46,072 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 17:12:46,072 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 17:12:46,072 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 17:12:46,073 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 17:12:46,073 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 17:12:46,073 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 17:12:46,073 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 17:12:46,073 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 17:12:46,074 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 17:12:46,074 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 17:12:46,074 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 17:12:46,074 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 17:12:46,075 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 17:12:46,075 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 17:12:46,075 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 17:12:46,075 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 17:12:46,075 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 17:12:46,075 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 17:12:46,075 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 17:12:46,075 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 17:12:46,076 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 17:12:46,076 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 17:12:46,076 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 17:12:46,076 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 17:12:46,076 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 17:12:46,076 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 17:12:46,076 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 17:12:46,078 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 17:12:46,078 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 17:12:46,078 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 17:12:46,078 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 17:12:46,079 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 17:12:46,079 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 17:12:46,079 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 17:12:46,079 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 17:12:46,086 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 17:12:46,086 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 17:12:46,086 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 17:12:46,087 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 17:12:46,087 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 17:12:46,087 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 17:12:46,087 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 17:12:46,087 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 17:12:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 17:12:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 17:12:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 17:12:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 17:12:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:12:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 17:12:46,089 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 17:12:46,089 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 17:12:46,089 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 17:12:46,089 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 17:12:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 17:12:46,092 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 17:12:46,092 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 17:12:46,092 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 17:12:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 17:12:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 17:12:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 17:12:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 17:12:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 17:12:46,095 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 17:12:46,095 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 17:12:46,095 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 17:12:46,096 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 17:12:46,096 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 17:12:46,097 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 17:12:46,097 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 17:12:46,097 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 17:12:46,097 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 17:12:46,097 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 17:12:46,098 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 17:12:46,098 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 17:12:46,098 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 17:12:46,098 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 17:12:46,098 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 17:12:46,099 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 17:12:46,099 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 17:12:46,099 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 17:12:46,099 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 17:12:46,099 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 17:12:46,099 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 17:12:46,100 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 17:12:46,100 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 17:12:46,100 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 17:12:46,100 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 17:12:46,100 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 17:12:46,100 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 17:12:46,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:12:46,101 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-07-20 17:12:46,101 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2020-07-20 17:12:46,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 17:12:46,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 17:12:46,102 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2020-07-20 17:12:46,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 17:12:46,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 17:12:46,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:12:46,103 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2020-07-20 17:12:46,103 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2020-07-20 17:12:46,103 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2020-07-20 17:12:46,103 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:12:46,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 17:12:46,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 17:12:46,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:12:46,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:12:47,414 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:12:47,415 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-07-20 17:12:47,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:12:47 BoogieIcfgContainer [2020-07-20 17:12:47,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:12:47,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:12:47,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:12:47,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:12:47,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:12:44" (1/3) ... [2020-07-20 17:12:47,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d838218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:12:47, skipping insertion in model container [2020-07-20 17:12:47,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:45" (2/3) ... [2020-07-20 17:12:47,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d838218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:12:47, skipping insertion in model container [2020-07-20 17:12:47,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:12:47" (3/3) ... [2020-07-20 17:12:47,460 INFO L109 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2020-07-20 17:12:47,479 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:12:47,492 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:12:47,508 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:12:47,539 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:12:47,539 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:12:47,539 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:12:47,539 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:12:47,539 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:12:47,539 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:12:47,539 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:12:47,540 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:12:47,571 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-07-20 17:12:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 17:12:47,583 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:12:47,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:12:47,586 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:12:47,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:12:47,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1873878464, now seen corresponding path program 1 times [2020-07-20 17:12:47,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:12:47,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940594604] [2020-07-20 17:12:47,607 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:12:47,909 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:12:47,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:12:47,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:12:47,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:12:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:12:48,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:12:48,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940594604] [2020-07-20 17:12:48,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:12:48,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:12:48,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467655304] [2020-07-20 17:12:48,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:12:48,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:12:48,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:12:48,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:12:48,068 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 3 states. [2020-07-20 17:12:48,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:12:48,271 INFO L93 Difference]: Finished difference Result 231 states and 387 transitions. [2020-07-20 17:12:48,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:12:48,278 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-20 17:12:48,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:12:48,299 INFO L225 Difference]: With dead ends: 231 [2020-07-20 17:12:48,299 INFO L226 Difference]: Without dead ends: 109 [2020-07-20 17:12:48,308 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 17:12:48,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-07-20 17:12:48,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2020-07-20 17:12:48,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-20 17:12:48,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2020-07-20 17:12:48,393 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 13 [2020-07-20 17:12:48,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:12:48,394 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2020-07-20 17:12:48,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:12:48,395 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2020-07-20 17:12:48,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 17:12:48,401 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:12:48,402 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 17:12:48,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:12:48,604 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:12:48,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:12:48,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1684995551, now seen corresponding path program 1 times [2020-07-20 17:12:48,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:12:48,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725855031] [2020-07-20 17:12:48,606 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:12:48,877 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:12:48,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:12:48,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 17:12:48,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:12:48,962 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 17:12:48,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:12:48,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725855031] [2020-07-20 17:12:48,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:12:48,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 17:12:48,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553896592] [2020-07-20 17:12:48,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 17:12:48,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:12:48,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 17:12:48,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:12:48,981 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 6 states. [2020-07-20 17:12:49,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:12:49,348 INFO L93 Difference]: Finished difference Result 151 states and 184 transitions. [2020-07-20 17:12:49,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:12:49,349 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-20 17:12:49,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:12:49,353 INFO L225 Difference]: With dead ends: 151 [2020-07-20 17:12:49,353 INFO L226 Difference]: Without dead ends: 146 [2020-07-20 17:12:49,355 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 17:12:49,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-07-20 17:12:49,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 108. [2020-07-20 17:12:49,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-20 17:12:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 131 transitions. [2020-07-20 17:12:49,382 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 131 transitions. Word has length 20 [2020-07-20 17:12:49,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:12:49,383 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 131 transitions. [2020-07-20 17:12:49,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 17:12:49,383 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 131 transitions. [2020-07-20 17:12:49,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 17:12:49,384 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:12:49,384 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 17:12:49,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:12:49,600 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:12:49,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:12:49,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1145945773, now seen corresponding path program 1 times [2020-07-20 17:12:49,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:12:49,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494270738] [2020-07-20 17:12:49,602 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:12:49,818 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:12:49,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:12:49,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 17:12:49,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:12:50,003 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 [2020-07-20 17:12:50,004 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:12:50,020 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:12:50,022 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 17:12:50,023 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:11 [2020-07-20 17:12:50,158 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 [2020-07-20 17:12:50,159 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:12:50,172 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:12:50,177 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 17:12:50,178 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:12:50,188 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:12:50,189 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:12:50,189 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:10 [2020-07-20 17:12:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:12:50,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:12:50,346 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 17:12:50,364 WARN L234 Elim1Store]: Array PQE input equivalent to true [2020-07-20 17:12:50,364 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:12:50,372 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 10 treesize of output 4 [2020-07-20 17:12:50,374 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:12:50,385 INFO L624 ElimStorePlain]: treesize reduction 10, result has 47.4 percent of original size [2020-07-20 17:12:50,386 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:12:50,387 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:9 [2020-07-20 17:12:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:12:50,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494270738] [2020-07-20 17:12:50,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:12:50,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-07-20 17:12:50,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083268103] [2020-07-20 17:12:50,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 17:12:50,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:12:50,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 17:12:50,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-07-20 17:12:50,487 INFO L87 Difference]: Start difference. First operand 108 states and 131 transitions. Second operand 15 states. [2020-07-20 17:12:51,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:12:51,496 INFO L93 Difference]: Finished difference Result 195 states and 236 transitions. [2020-07-20 17:12:51,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 17:12:51,498 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-07-20 17:12:51,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:12:51,500 INFO L225 Difference]: With dead ends: 195 [2020-07-20 17:12:51,501 INFO L226 Difference]: Without dead ends: 192 [2020-07-20 17:12:51,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-07-20 17:12:51,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-20 17:12:51,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 153. [2020-07-20 17:12:51,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-07-20 17:12:51,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 187 transitions. [2020-07-20 17:12:51,527 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 187 transitions. Word has length 27 [2020-07-20 17:12:51,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:12:51,527 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 187 transitions. [2020-07-20 17:12:51,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 17:12:51,528 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 187 transitions. [2020-07-20 17:12:51,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 17:12:51,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:12:51,530 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 17:12:51,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:12:51,736 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:12:51,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:12:51,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1471361763, now seen corresponding path program 1 times [2020-07-20 17:12:51,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:12:51,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970461766] [2020-07-20 17:12:51,739 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:12:51,891 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:12:51,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:12:51,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 17:12:51,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:12:51,946 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 [2020-07-20 17:12:51,946 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:12:51,969 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:12:51,978 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 [2020-07-20 17:12:51,979 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:12:51,995 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:12:51,997 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 17:12:51,998 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:32, output treesize:18 [2020-07-20 17:12:52,074 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 [2020-07-20 17:12:52,075 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:12:52,086 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:12:52,091 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 [2020-07-20 17:12:52,092 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:12:52,100 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:12:52,101 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:12:52,101 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-07-20 17:12:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:12:52,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:12:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:12:52,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970461766] [2020-07-20 17:12:52,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:12:52,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-20 17:12:52,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092033747] [2020-07-20 17:12:52,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 17:12:52,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:12:52,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 17:12:52,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-07-20 17:12:52,218 INFO L87 Difference]: Start difference. First operand 153 states and 187 transitions. Second operand 11 states. [2020-07-20 17:12:52,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:12:52,787 INFO L93 Difference]: Finished difference Result 228 states and 278 transitions. [2020-07-20 17:12:52,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 17:12:52,790 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-07-20 17:12:52,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:12:52,791 INFO L225 Difference]: With dead ends: 228 [2020-07-20 17:12:52,792 INFO L226 Difference]: Without dead ends: 142 [2020-07-20 17:12:52,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-07-20 17:12:52,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-20 17:12:52,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2020-07-20 17:12:52,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-20 17:12:52,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 160 transitions. [2020-07-20 17:12:52,813 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 160 transitions. Word has length 27 [2020-07-20 17:12:52,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:12:52,814 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 160 transitions. [2020-07-20 17:12:52,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 17:12:52,814 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 160 transitions. [2020-07-20 17:12:52,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 17:12:52,815 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:12:52,815 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 17:12:53,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:12:53,031 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:12:53,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:12:53,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1648323131, now seen corresponding path program 1 times [2020-07-20 17:12:53,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:12:53,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846165842] [2020-07-20 17:12:53,033 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 17:12:53,181 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:12:53,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:12:53,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 17:12:53,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:12:53,234 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 17:12:53,234 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:12:53,244 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:12:53,246 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 17:12:53,248 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:12 [2020-07-20 17:12:53,295 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 17:12:53,296 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:12:53,300 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:12:53,301 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 17:12:53,301 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2020-07-20 17:12:53,317 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 17:12:53,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:12:53,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846165842] [2020-07-20 17:12:53,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:12:53,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 17:12:53,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629484184] [2020-07-20 17:12:53,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 17:12:53,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:12:53,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 17:12:53,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-20 17:12:53,322 INFO L87 Difference]: Start difference. First operand 134 states and 160 transitions. Second operand 8 states. [2020-07-20 17:12:53,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:12:53,797 INFO L93 Difference]: Finished difference Result 169 states and 202 transitions. [2020-07-20 17:12:53,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 17:12:53,799 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-07-20 17:12:53,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:12:53,801 INFO L225 Difference]: With dead ends: 169 [2020-07-20 17:12:53,802 INFO L226 Difference]: Without dead ends: 166 [2020-07-20 17:12:53,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-20 17:12:53,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-07-20 17:12:53,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 140. [2020-07-20 17:12:53,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-20 17:12:53,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 166 transitions. [2020-07-20 17:12:53,823 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 166 transitions. Word has length 30 [2020-07-20 17:12:53,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:12:53,824 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 166 transitions. [2020-07-20 17:12:53,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 17:12:53,824 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 166 transitions. [2020-07-20 17:12:53,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 17:12:53,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:12:53,826 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 17:12:54,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:12:54,041 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:12:54,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:12:54,042 INFO L82 PathProgramCache]: Analyzing trace with hash 671486784, now seen corresponding path program 1 times [2020-07-20 17:12:54,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:12:54,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353892260] [2020-07-20 17:12:54,043 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 17:12:54,237 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:12:54,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 17:12:54,238 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:12:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 17:12:54,275 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:12:54,355 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 17:12:54,355 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:12:54,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:12:54,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:12:54 BoogieIcfgContainer [2020-07-20 17:12:54,655 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:12:54,658 INFO L168 Benchmark]: Toolchain (without parser) took 9835.42 ms. Allocated memory was 143.7 MB in the beginning and 295.7 MB in the end (delta: 152.0 MB). Free memory was 100.0 MB in the beginning and 190.3 MB in the end (delta: -90.3 MB). Peak memory consumption was 61.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:12:54,660 INFO L168 Benchmark]: CDTParser took 0.49 ms. Allocated memory is still 143.7 MB. Free memory was 119.9 MB in the beginning and 119.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 17:12:54,661 INFO L168 Benchmark]: CACSL2BoogieTranslator took 989.73 ms. Allocated memory was 143.7 MB in the beginning and 202.9 MB in the end (delta: 59.2 MB). Free memory was 99.6 MB in the beginning and 167.9 MB in the end (delta: -68.4 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-07-20 17:12:54,662 INFO L168 Benchmark]: Boogie Preprocessor took 158.09 ms. Allocated memory is still 202.9 MB. Free memory was 167.9 MB in the beginning and 164.2 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB. [2020-07-20 17:12:54,663 INFO L168 Benchmark]: RCFGBuilder took 1449.78 ms. Allocated memory is still 202.9 MB. Free memory was 164.2 MB in the beginning and 95.5 MB in the end (delta: 68.7 MB). Peak memory consumption was 68.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:12:54,663 INFO L168 Benchmark]: TraceAbstraction took 7220.40 ms. Allocated memory was 202.9 MB in the beginning and 295.7 MB in the end (delta: 92.8 MB). Free memory was 94.8 MB in the beginning and 190.3 MB in the end (delta: -95.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 17:12:54,667 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 143.7 MB. Free memory was 119.9 MB in the beginning and 119.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 989.73 ms. Allocated memory was 143.7 MB in the beginning and 202.9 MB in the end (delta: 59.2 MB). Free memory was 99.6 MB in the beginning and 167.9 MB in the end (delta: -68.4 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 158.09 ms. Allocated memory is still 202.9 MB. Free memory was 167.9 MB in the beginning and 164.2 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1449.78 ms. Allocated memory is still 202.9 MB. Free memory was 164.2 MB in the beginning and 95.5 MB in the end (delta: 68.7 MB). Peak memory consumption was 68.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7220.40 ms. Allocated memory was 202.9 MB in the beginning and 295.7 MB in the end (delta: 92.8 MB). Free memory was 94.8 MB in the beginning and 190.3 MB in the end (delta: -95.6 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)={-1:0}, node={-1:0}] [L630] COND FALSE !(!node) VAL [data={0:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L632] node->next = node [L633] node->value = __VERIFIER_nondet_int() [L634] struct list *item = malloc(sizeof *item); VAL [data={0:0}, item={21238:0}, malloc(sizeof *item)={21238:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L635] COND FALSE !(!item) VAL [data={0:0}, item={21238:0}, malloc(sizeof *item)={21238:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L637] item->slist = node [L638] item->next = data [L639] data = item VAL [data={21238:0}, item={21238:0}, malloc(sizeof *item)={21238:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L628] COND FALSE !(__VERIFIER_nondet_int()) [L641] COND FALSE !(!data) VAL [data={21238:0}, item={21238:0}, malloc(sizeof *item)={21238:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L643] CALL inspect_before(data) VAL [shape={21238:0}] [L604] COND FALSE !(!(shape)) VAL [shape={21238:0}, shape={21238:0}] [L605] shape->next VAL [shape={21238:0}, shape={21238:0}, shape->next={0:0}] [L605] COND FALSE !(shape->next) [L611] COND FALSE !(!(shape)) VAL [shape={21238:0}, shape={21238:0}] [L612] EXPR shape->next VAL [shape={21238:0}, shape={21238:0}, shape->next={0:0}] [L612] COND FALSE !(!(shape->next == ((void *)0))) [L613] EXPR shape->slist VAL [shape={21238:0}, shape={21238:0}, shape->slist={-1:0}] [L613] COND FALSE !(!(shape->slist)) [L614] EXPR shape->slist [L614] EXPR shape->slist->next VAL [shape={21238:0}, shape={21238:0}, shape->slist={-1:0}, shape->slist->next={-1:0}] [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: 7.0s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 582 SDtfs, 439 SDslu, 2548 SDs, 0 SdLazy, 980 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 179 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=153occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 115 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 150 NumberOfCodeBlocks, 115 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 164 ConstructedInterpolants, 0 QuantifiedInterpolants, 30694 SizeOfPredicates, 45 NumberOfNonLiveVariables, 428 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 4/12 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...