/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --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 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -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 0.1.25-79ed534 [2020-07-20 01:27:58,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:27:58,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:27:58,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 01:27:58,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 01:27:58,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 01:27:58,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 01:27:58,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 01:27:58,756 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 01:27:58,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 01:27:58,762 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 01:27:58,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 01:27:58,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:27:58,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:27:58,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:27:58,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:27:58,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:27:58,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:27:58,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:27:58,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:27:58,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:27:58,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:27:58,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:27:58,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:27:58,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 01:27:58,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 01:27:58,794 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 01:27:58,797 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 01:27:58,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 01:27:58,798 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 01:27:58,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 01:27:58,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 01:27:58,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 01:27:58,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 01:27:58,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 01:27:58,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 01:27:58,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 01:27:58,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 01:27:58,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:27:58,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:27:58,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:27:58,811 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 01:27:58,826 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:27:58,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:27:58,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:27:58,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:27:58,828 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:27:58,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:27:58,829 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:27:58,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:27:58,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:27:58,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:27:58,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:27:58,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:27:58,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:27:58,830 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:27:58,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:27:58,831 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:27:58,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:27:58,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:27:58,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:27:58,832 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:27:58,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:27:58,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:27:58,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:27:58,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:27:58,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:27:58,833 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:27:58,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:27:58,834 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:27:58,834 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:27:58,834 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:27:59,148 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:27:59,162 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:27:59,165 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:27:59,167 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:27:59,167 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:27:59,168 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-07-20 01:27:59,231 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdea863c3/a61e03d97a564549bed2a2ebcad48062/FLAGad404dd26 [2020-07-20 01:27:59,749 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:27:59,750 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-07-20 01:27:59,763 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdea863c3/a61e03d97a564549bed2a2ebcad48062/FLAGad404dd26 [2020-07-20 01:28:00,077 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdea863c3/a61e03d97a564549bed2a2ebcad48062 [2020-07-20 01:28:00,086 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:28:00,089 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:28:00,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:28:00,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:28:00,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:28:00,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:28:00" (1/1) ... [2020-07-20 01:28:00,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@431b03d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:28:00, skipping insertion in model container [2020-07-20 01:28:00,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:28:00" (1/1) ... [2020-07-20 01:28:00,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:28:00,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:28:00,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:28:00,671 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:28:00,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:28:00,785 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:28:00,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:28:00 WrapperNode [2020-07-20 01:28:00,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:28:00,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:28:00,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:28:00,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:28:00,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:28:00" (1/1) ... [2020-07-20 01:28:00,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:28:00" (1/1) ... [2020-07-20 01:28:00,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:28:00" (1/1) ... [2020-07-20 01:28:00,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:28:00" (1/1) ... [2020-07-20 01:28:00,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:28:00" (1/1) ... [2020-07-20 01:28:00,861 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:28:00" (1/1) ... [2020-07-20 01:28:00,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:28:00" (1/1) ... [2020-07-20 01:28:00,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:28:00,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:28:00,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:28:00,880 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:28:00,880 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:28:00" (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 01:28:00,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:28:00,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:28:00,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 01:28:00,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 01:28:00,943 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-07-20 01:28:00,944 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2020-07-20 01:28:00,944 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2020-07-20 01:28:00,945 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2020-07-20 01:28:00,945 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2020-07-20 01:28:00,945 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2020-07-20 01:28:00,945 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:28:00,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:28:00,946 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 01:28:00,947 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 01:28:00,947 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 01:28:00,947 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 01:28:00,948 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 01:28:00,948 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 01:28:00,948 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 01:28:00,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 01:28:00,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 01:28:00,949 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 01:28:00,949 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 01:28:00,949 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 01:28:00,949 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 01:28:00,950 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 01:28:00,950 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 01:28:00,950 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 01:28:00,950 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 01:28:00,950 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 01:28:00,951 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 01:28:00,951 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 01:28:00,951 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 01:28:00,951 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 01:28:00,951 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 01:28:00,952 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 01:28:00,952 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 01:28:00,952 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 01:28:00,952 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 01:28:00,952 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 01:28:00,952 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 01:28:00,953 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 01:28:00,953 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 01:28:00,953 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 01:28:00,953 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 01:28:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 01:28:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 01:28:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 01:28:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 01:28:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 01:28:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 01:28:00,955 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 01:28:00,955 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 01:28:00,955 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 01:28:00,955 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 01:28:00,955 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 01:28:00,955 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 01:28:00,956 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 01:28:00,956 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 01:28:00,956 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 01:28:00,956 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 01:28:00,956 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 01:28:00,957 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 01:28:00,957 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 01:28:00,957 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 01:28:00,957 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 01:28:00,957 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 01:28:00,958 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 01:28:00,958 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 01:28:00,958 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 01:28:00,959 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 01:28:00,959 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 01:28:00,959 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 01:28:00,960 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 01:28:00,960 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 01:28:00,960 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 01:28:00,960 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 01:28:00,961 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 01:28:00,961 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 01:28:00,961 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 01:28:00,961 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 01:28:00,963 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 01:28:00,963 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 01:28:00,963 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 01:28:00,963 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 01:28:00,963 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 01:28:00,963 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 01:28:00,964 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 01:28:00,964 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 01:28:00,964 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 01:28:00,964 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 01:28:00,964 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 01:28:00,964 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 01:28:00,964 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 01:28:00,965 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 01:28:00,965 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 01:28:00,965 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 01:28:00,965 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 01:28:00,965 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 01:28:00,965 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 01:28:00,965 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 01:28:00,966 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 01:28:00,966 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 01:28:00,966 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 01:28:00,966 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 01:28:00,966 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 01:28:00,966 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 01:28:00,966 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 01:28:00,967 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 01:28:00,967 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 01:28:00,967 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 01:28:00,967 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 01:28:00,967 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 01:28:00,967 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 01:28:00,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 01:28:00,968 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-07-20 01:28:00,968 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2020-07-20 01:28:00,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 01:28:00,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 01:28:00,969 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2020-07-20 01:28:00,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 01:28:00,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 01:28:00,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 01:28:00,970 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2020-07-20 01:28:00,971 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2020-07-20 01:28:00,971 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2020-07-20 01:28:00,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:28:00,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 01:28:00,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 01:28:00,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:28:00,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:28:01,766 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:28:01,767 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-07-20 01:28:01,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:28:01 BoogieIcfgContainer [2020-07-20 01:28:01,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:28:01,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:28:01,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:28:01,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:28:01,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:28:00" (1/3) ... [2020-07-20 01:28:01,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b80e05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:28:01, skipping insertion in model container [2020-07-20 01:28:01,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:28:00" (2/3) ... [2020-07-20 01:28:01,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b80e05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:28:01, skipping insertion in model container [2020-07-20 01:28:01,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:28:01" (3/3) ... [2020-07-20 01:28:01,781 INFO L109 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2020-07-20 01:28:01,793 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:28:01,803 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:28:01,820 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:28:01,848 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:28:01,849 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:28:01,849 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:28:01,849 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:28:01,849 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:28:01,850 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:28:01,850 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:28:01,881 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:28:01,905 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-07-20 01:28:01,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 01:28:01,913 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:01,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:28:01,915 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:01,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:01,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1873878464, now seen corresponding path program 1 times [2020-07-20 01:28:01,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:01,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567950748] [2020-07-20 01:28:01,934 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1eb77e0d [2020-07-20 01:28:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:02,106 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 01:28:02,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567950748] [2020-07-20 01:28:02,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:28:02,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:28:02,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494032286] [2020-07-20 01:28:02,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:28:02,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:28:02,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:28:02,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:02,134 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 3 states. [2020-07-20 01:28:02,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:28:02,385 INFO L93 Difference]: Finished difference Result 240 states and 408 transitions. [2020-07-20 01:28:02,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:28:02,387 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-20 01:28:02,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:28:02,401 INFO L225 Difference]: With dead ends: 240 [2020-07-20 01:28:02,401 INFO L226 Difference]: Without dead ends: 118 [2020-07-20 01:28:02,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 01:28:02,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-20 01:28:02,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103. [2020-07-20 01:28:02,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-07-20 01:28:02,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2020-07-20 01:28:02,468 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 13 [2020-07-20 01:28:02,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:02,469 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2020-07-20 01:28:02,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:28:02,469 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2020-07-20 01:28:02,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 01:28:02,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:02,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:28:02,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:28:02,470 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:02,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:02,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1323314826, now seen corresponding path program 1 times [2020-07-20 01:28:02,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:02,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423687444] [2020-07-20 01:28:02,472 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1eb77e0d [2020-07-20 01:28:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:02,551 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 01:28:02,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423687444] [2020-07-20 01:28:02,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:28:02,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 01:28:02,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424835505] [2020-07-20 01:28:02,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 01:28:02,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:28:02,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 01:28:02,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 01:28:02,555 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand 4 states. [2020-07-20 01:28:02,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:28:02,865 INFO L93 Difference]: Finished difference Result 206 states and 255 transitions. [2020-07-20 01:28:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 01:28:02,865 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-20 01:28:02,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:28:02,868 INFO L225 Difference]: With dead ends: 206 [2020-07-20 01:28:02,868 INFO L226 Difference]: Without dead ends: 115 [2020-07-20 01:28:02,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:28:02,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-07-20 01:28:02,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2020-07-20 01:28:02,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-20 01:28:02,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2020-07-20 01:28:02,886 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 14 [2020-07-20 01:28:02,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:02,886 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2020-07-20 01:28:02,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 01:28:02,887 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2020-07-20 01:28:02,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 01:28:02,888 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:02,888 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 01:28:02,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 01:28:02,888 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:02,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:02,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1684995551, now seen corresponding path program 1 times [2020-07-20 01:28:02,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:02,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535669644] [2020-07-20 01:28:02,889 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1eb77e0d [2020-07-20 01:28:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:03,014 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 01:28:03,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535669644] [2020-07-20 01:28:03,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:28:03,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 01:28:03,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520409036] [2020-07-20 01:28:03,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 01:28:03,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:28:03,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 01:28:03,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:28:03,018 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 7 states. [2020-07-20 01:28:03,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:28:03,585 INFO L93 Difference]: Finished difference Result 157 states and 194 transitions. [2020-07-20 01:28:03,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:28:03,586 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-07-20 01:28:03,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:28:03,589 INFO L225 Difference]: With dead ends: 157 [2020-07-20 01:28:03,590 INFO L226 Difference]: Without dead ends: 152 [2020-07-20 01:28:03,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-20 01:28:03,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-20 01:28:03,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 108. [2020-07-20 01:28:03,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-20 01:28:03,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 131 transitions. [2020-07-20 01:28:03,631 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 131 transitions. Word has length 20 [2020-07-20 01:28:03,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:03,632 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 131 transitions. [2020-07-20 01:28:03,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 01:28:03,634 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 131 transitions. [2020-07-20 01:28:03,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 01:28:03,635 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:03,636 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 01:28:03,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 01:28:03,636 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:03,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:03,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1145945773, now seen corresponding path program 1 times [2020-07-20 01:28:03,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:03,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782020640] [2020-07-20 01:28:03,641 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1eb77e0d [2020-07-20 01:28:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:28:03,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782020640] [2020-07-20 01:28:03,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:28:03,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 01:28:03,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029276999] [2020-07-20 01:28:03,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 01:28:03,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:28:03,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 01:28:03,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:28:03,738 INFO L87 Difference]: Start difference. First operand 108 states and 131 transitions. Second operand 6 states. [2020-07-20 01:28:04,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:28:04,159 INFO L93 Difference]: Finished difference Result 116 states and 141 transitions. [2020-07-20 01:28:04,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:28:04,159 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-07-20 01:28:04,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:28:04,161 INFO L225 Difference]: With dead ends: 116 [2020-07-20 01:28:04,161 INFO L226 Difference]: Without dead ends: 113 [2020-07-20 01:28:04,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:28:04,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-07-20 01:28:04,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2020-07-20 01:28:04,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-20 01:28:04,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2020-07-20 01:28:04,181 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 27 [2020-07-20 01:28:04,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:04,181 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2020-07-20 01:28:04,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 01:28:04,181 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2020-07-20 01:28:04,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 01:28:04,182 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:04,182 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 01:28:04,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 01:28:04,183 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:04,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:04,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1471361763, now seen corresponding path program 1 times [2020-07-20 01:28:04,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:04,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974540104] [2020-07-20 01:28:04,184 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1eb77e0d [2020-07-20 01:28:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:04,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:28:04,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974540104] [2020-07-20 01:28:04,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:28:04,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 01:28:04,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675929178] [2020-07-20 01:28:04,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 01:28:04,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:28:04,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 01:28:04,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:28:04,266 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand 6 states. [2020-07-20 01:28:04,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:28:04,691 INFO L93 Difference]: Finished difference Result 115 states and 139 transitions. [2020-07-20 01:28:04,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:28:04,692 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-07-20 01:28:04,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:28:04,693 INFO L225 Difference]: With dead ends: 115 [2020-07-20 01:28:04,693 INFO L226 Difference]: Without dead ends: 112 [2020-07-20 01:28:04,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:28:04,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-20 01:28:04,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2020-07-20 01:28:04,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-20 01:28:04,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2020-07-20 01:28:04,704 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 27 [2020-07-20 01:28:04,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:04,705 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2020-07-20 01:28:04,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 01:28:04,705 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2020-07-20 01:28:04,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 01:28:04,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:04,706 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 01:28:04,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 01:28:04,707 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:04,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:04,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1648323131, now seen corresponding path program 1 times [2020-07-20 01:28:04,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:04,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329244777] [2020-07-20 01:28:04,708 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1eb77e0d [2020-07-20 01:28:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:04,834 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 01:28:04,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329244777] [2020-07-20 01:28:04,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:28:04,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 01:28:04,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401534532] [2020-07-20 01:28:04,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 01:28:04,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:28:04,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 01:28:04,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:28:04,838 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand 8 states. [2020-07-20 01:28:05,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:28:05,513 INFO L93 Difference]: Finished difference Result 147 states and 177 transitions. [2020-07-20 01:28:05,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 01:28:05,514 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-07-20 01:28:05,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:28:05,516 INFO L225 Difference]: With dead ends: 147 [2020-07-20 01:28:05,516 INFO L226 Difference]: Without dead ends: 144 [2020-07-20 01:28:05,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-07-20 01:28:05,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-07-20 01:28:05,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2020-07-20 01:28:05,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-20 01:28:05,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2020-07-20 01:28:05,527 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 30 [2020-07-20 01:28:05,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:05,527 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2020-07-20 01:28:05,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 01:28:05,528 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2020-07-20 01:28:05,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 01:28:05,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:05,529 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 01:28:05,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 01:28:05,529 INFO L427 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:05,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:05,530 INFO L82 PathProgramCache]: Analyzing trace with hash 861386650, now seen corresponding path program 1 times [2020-07-20 01:28:05,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:05,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965574227] [2020-07-20 01:28:05,530 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1eb77e0d [2020-07-20 01:28:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:05,615 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 01:28:05,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965574227] [2020-07-20 01:28:05,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:28:05,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 01:28:05,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603263419] [2020-07-20 01:28:05,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 01:28:05,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:28:05,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 01:28:05,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:28:05,617 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand 8 states. [2020-07-20 01:28:06,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:28:06,228 INFO L93 Difference]: Finished difference Result 146 states and 175 transitions. [2020-07-20 01:28:06,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 01:28:06,229 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-07-20 01:28:06,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:28:06,231 INFO L225 Difference]: With dead ends: 146 [2020-07-20 01:28:06,231 INFO L226 Difference]: Without dead ends: 143 [2020-07-20 01:28:06,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-07-20 01:28:06,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-07-20 01:28:06,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 118. [2020-07-20 01:28:06,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-07-20 01:28:06,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2020-07-20 01:28:06,241 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 30 [2020-07-20 01:28:06,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:06,242 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2020-07-20 01:28:06,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 01:28:06,242 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2020-07-20 01:28:06,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 01:28:06,243 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:06,243 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 01:28:06,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 01:28:06,244 INFO L427 AbstractCegarLoop]: === Iteration 8 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:06,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:06,244 INFO L82 PathProgramCache]: Analyzing trace with hash 671486784, now seen corresponding path program 1 times [2020-07-20 01:28:06,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:06,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615932306] [2020-07-20 01:28:06,245 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1eb77e0d [2020-07-20 01:28:06,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 01:28:06,265 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 01:28:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 01:28:06,281 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 01:28:06,314 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 01:28:06,314 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 01:28:06,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-20 01:28:06,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:28:06 BoogieIcfgContainer [2020-07-20 01:28:06,353 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 01:28:06,356 INFO L168 Benchmark]: Toolchain (without parser) took 6267.02 ms. Allocated memory was 138.4 MB in the beginning and 289.9 MB in the end (delta: 151.5 MB). Free memory was 101.5 MB in the beginning and 146.5 MB in the end (delta: -45.0 MB). Peak memory consumption was 106.5 MB. Max. memory is 7.1 GB. [2020-07-20 01:28:06,357 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 01:28:06,358 INFO L168 Benchmark]: CACSL2BoogieTranslator took 696.49 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 101.0 MB in the beginning and 167.6 MB in the end (delta: -66.6 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. [2020-07-20 01:28:06,359 INFO L168 Benchmark]: Boogie Preprocessor took 87.81 ms. Allocated memory is still 203.4 MB. Free memory was 167.6 MB in the beginning and 163.7 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. [2020-07-20 01:28:06,360 INFO L168 Benchmark]: RCFGBuilder took 893.21 ms. Allocated memory is still 203.4 MB. Free memory was 163.7 MB in the beginning and 95.0 MB in the end (delta: 68.6 MB). Peak memory consumption was 68.6 MB. Max. memory is 7.1 GB. [2020-07-20 01:28:06,360 INFO L168 Benchmark]: TraceAbstraction took 4579.29 ms. Allocated memory was 203.4 MB in the beginning and 289.9 MB in the end (delta: 86.5 MB). Free memory was 94.4 MB in the beginning and 146.5 MB in the end (delta: -52.1 MB). Peak memory consumption was 34.4 MB. Max. memory is 7.1 GB. [2020-07-20 01:28:06,365 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 696.49 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 101.0 MB in the beginning and 167.6 MB in the end (delta: -66.6 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 87.81 ms. Allocated memory is still 203.4 MB. Free memory was 167.6 MB in the beginning and 163.7 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 893.21 ms. Allocated memory is still 203.4 MB. Free memory was 163.7 MB in the beginning and 95.0 MB in the end (delta: 68.6 MB). Peak memory consumption was 68.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4579.29 ms. Allocated memory was 203.4 MB in the beginning and 289.9 MB in the end (delta: 86.5 MB). Free memory was 94.4 MB in the beginning and 146.5 MB in the end (delta: -52.1 MB). Peak memory consumption was 34.4 MB. 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={-2:0}, malloc(sizeof *item)={-2:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L635] COND FALSE !(!item) VAL [data={0:0}, item={-2:0}, malloc(sizeof *item)={-2:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L637] item->slist = node [L638] item->next = data [L639] data = item VAL [data={-2:0}, item={-2:0}, malloc(sizeof *item)={-2:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L628] COND FALSE !(__VERIFIER_nondet_int()) [L641] COND FALSE !(!data) VAL [data={-2:0}, item={-2:0}, malloc(sizeof *item)={-2:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L643] CALL inspect_before(data) VAL [shape={-2:0}] [L604] COND FALSE !(!(shape)) VAL [shape={-2:0}, shape={-2:0}] [L605] shape->next VAL [shape={-2:0}, shape={-2:0}, shape->next={0:0}] [L605] COND FALSE !(shape->next) [L611] COND FALSE !(!(shape)) VAL [shape={-2:0}, shape={-2:0}] [L612] EXPR shape->next VAL [shape={-2:0}, shape={-2:0}, shape->next={0:0}] [L612] COND FALSE !(!(shape->next == ((void *)0))) [L613] EXPR shape->slist VAL [shape={-2:0}, shape={-2:0}, shape->slist={-1:0}] [L613] COND FALSE !(!(shape->slist)) [L614] EXPR shape->slist [L614] EXPR shape->slist->next VAL [shape={-2:0}, shape={-2:0}, 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: 4.4s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 793 SDtfs, 921 SDslu, 888 SDs, 0 SdLazy, 1951 SolverSat, 200 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred in iteration=7, 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, 7 MinimizatonAttempts, 138 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 194 NumberOfCodeBlocks, 194 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 17008 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 10/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...