/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 13:43:56,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:43:56,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:43:56,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:43:56,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:43:56,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:43:56,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:43:56,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:43:56,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:43:56,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:43:56,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:43:56,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:43:56,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:43:56,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:43:56,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:43:56,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:43:56,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:43:56,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:43:56,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:43:56,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:43:56,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:43:56,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:43:56,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:43:56,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:43:56,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 13:43:56,752 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 13:43:56,752 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 13:43:56,753 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 13:43:56,753 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 13:43:56,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 13:43:56,755 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 13:43:56,756 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 13:43:56,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 13:43:56,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 13:43:56,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 13:43:56,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 13:43:56,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 13:43:56,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 13:43:56,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 13:43:56,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 13:43:56,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 13:43:56,762 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 13:43:56,777 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:43:56,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:43:56,779 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:43:56,779 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:43:56,780 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:43:56,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:43:56,780 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:43:56,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:43:56,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:43:56,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:43:56,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:43:56,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:43:56,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:43:56,781 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:43:56,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:43:56,782 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:43:56,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:43:56,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:43:56,782 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:43:56,782 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:43:56,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:43:56,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:43:56,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:43:56,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:43:56,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:43:56,784 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:43:56,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:43:56,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:43:56,784 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:43:56,784 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 13:43:57,090 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:43:57,107 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:43:57,111 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:43:57,113 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:43:57,114 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:43:57,116 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-07-21 13:43:57,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79ff3386e/69b5418371c149cfad774776369fc7dd/FLAGf16f00b18 [2020-07-21 13:43:57,794 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:43:57,797 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-07-21 13:43:57,815 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79ff3386e/69b5418371c149cfad774776369fc7dd/FLAGf16f00b18 [2020-07-21 13:43:58,072 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79ff3386e/69b5418371c149cfad774776369fc7dd [2020-07-21 13:43:58,083 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:43:58,087 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:43:58,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:43:58,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:43:58,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:43:58,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:43:58" (1/1) ... [2020-07-21 13:43:58,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15875eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:58, skipping insertion in model container [2020-07-21 13:43:58,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:43:58" (1/1) ... [2020-07-21 13:43:58,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:43:58,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:43:58,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:43:58,696 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:43:58,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:43:58,830 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:43:58,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:58 WrapperNode [2020-07-21 13:43:58,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:43:58,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:43:58,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:43:58,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:43:58,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:58" (1/1) ... [2020-07-21 13:43:58,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:58" (1/1) ... [2020-07-21 13:43:58,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:58" (1/1) ... [2020-07-21 13:43:58,874 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:58" (1/1) ... [2020-07-21 13:43:58,892 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:58" (1/1) ... [2020-07-21 13:43:58,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:58" (1/1) ... [2020-07-21 13:43:58,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:58" (1/1) ... [2020-07-21 13:43:58,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:43:58,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:43:58,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:43:58,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:43:58,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:43:58,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:43:58,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:43:58,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-21 13:43:58,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-21 13:43:58,985 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-21 13:43:58,985 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-07-21 13:43:58,985 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:43:58,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:43:58,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 13:43:58,986 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-21 13:43:58,986 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-21 13:43:58,986 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 13:43:58,986 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 13:43:58,987 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 13:43:58,987 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 13:43:58,987 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 13:43:58,987 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 13:43:58,987 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 13:43:58,988 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 13:43:58,988 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 13:43:58,988 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 13:43:58,988 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 13:43:58,988 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 13:43:58,989 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 13:43:58,989 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 13:43:58,989 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 13:43:58,989 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 13:43:58,989 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 13:43:58,990 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 13:43:58,990 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 13:43:58,990 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 13:43:58,990 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 13:43:58,990 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 13:43:58,991 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 13:43:58,991 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 13:43:58,991 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 13:43:58,991 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 13:43:58,991 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 13:43:58,991 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 13:43:58,992 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 13:43:58,992 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 13:43:58,992 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 13:43:58,992 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 13:43:58,992 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 13:43:58,992 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 13:43:58,992 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 13:43:58,993 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 13:43:58,993 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 13:43:58,993 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 13:43:58,993 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 13:43:58,993 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 13:43:58,993 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 13:43:58,994 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 13:43:58,994 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 13:43:58,994 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 13:43:58,994 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 13:43:58,994 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 13:43:58,994 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 13:43:58,995 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 13:43:58,995 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 13:43:58,995 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 13:43:58,995 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 13:43:58,995 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 13:43:58,995 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 13:43:58,996 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 13:43:58,996 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 13:43:58,996 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 13:43:58,996 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 13:43:58,996 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 13:43:58,996 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 13:43:58,997 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 13:43:58,997 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 13:43:58,997 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 13:43:58,997 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 13:43:58,997 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 13:43:58,997 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 13:43:58,997 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 13:43:58,998 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 13:43:58,998 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 13:43:58,998 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 13:43:58,998 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 13:43:58,998 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 13:43:58,998 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 13:43:58,999 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 13:43:58,999 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 13:43:58,999 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 13:43:58,999 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 13:43:58,999 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 13:43:58,999 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 13:43:58,999 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 13:43:59,000 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 13:43:59,000 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 13:43:59,000 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 13:43:59,000 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 13:43:59,000 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 13:43:59,000 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 13:43:59,000 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 13:43:59,001 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 13:43:59,001 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 13:43:59,001 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 13:43:59,001 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 13:43:59,001 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 13:43:59,001 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 13:43:59,001 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 13:43:59,002 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 13:43:59,002 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 13:43:59,002 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 13:43:59,002 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 13:43:59,002 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 13:43:59,002 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 13:43:59,002 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 13:43:59,003 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 13:43:59,003 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 13:43:59,003 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 13:43:59,003 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-21 13:43:59,003 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-07-21 13:43:59,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 13:43:59,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 13:43:59,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 13:43:59,004 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:43:59,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 13:43:59,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 13:43:59,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 13:43:59,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:43:59,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:43:59,342 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-21 13:43:59,578 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:43:59,579 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 13:43:59,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:43:59 BoogieIcfgContainer [2020-07-21 13:43:59,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:43:59,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:43:59,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:43:59,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:43:59,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:43:58" (1/3) ... [2020-07-21 13:43:59,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dec6afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:43:59, skipping insertion in model container [2020-07-21 13:43:59,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:58" (2/3) ... [2020-07-21 13:43:59,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dec6afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:43:59, skipping insertion in model container [2020-07-21 13:43:59,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:43:59" (3/3) ... [2020-07-21 13:43:59,592 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-07-21 13:43:59,604 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:43:59,613 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 13:43:59,628 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 13:43:59,652 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:43:59,652 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:43:59,652 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:43:59,652 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:43:59,653 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:43:59,653 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:43:59,653 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:43:59,653 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:43:59,671 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-07-21 13:43:59,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 13:43:59,678 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:43:59,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:43:59,679 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:43:59,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:43:59,684 INFO L82 PathProgramCache]: Analyzing trace with hash 248267832, now seen corresponding path program 1 times [2020-07-21 13:43:59,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:43:59,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477180953] [2020-07-21 13:43:59,692 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:43:59,863 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:43:59,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:43:59,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:43:59,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:43:59,942 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 13:43:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:43:59,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:43:59,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477180953] [2020-07-21 13:43:59,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:43:59,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 13:43:59,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872259516] [2020-07-21 13:43:59,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 13:43:59,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:43:59,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 13:43:59,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 13:43:59,988 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-07-21 13:44:00,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:44:00,058 INFO L93 Difference]: Finished difference Result 66 states and 92 transitions. [2020-07-21 13:44:00,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 13:44:00,060 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-07-21 13:44:00,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:44:00,073 INFO L225 Difference]: With dead ends: 66 [2020-07-21 13:44:00,073 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 13:44:00,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:44:00,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 13:44:00,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-07-21 13:44:00,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 13:44:00,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2020-07-21 13:44:00,116 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 20 [2020-07-21 13:44:00,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:44:00,117 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2020-07-21 13:44:00,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 13:44:00,118 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2020-07-21 13:44:00,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 13:44:00,119 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:44:00,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:44:00,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:44:00,333 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:44:00,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:44:00,335 INFO L82 PathProgramCache]: Analyzing trace with hash 248265910, now seen corresponding path program 1 times [2020-07-21 13:44:00,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:44:00,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222549515] [2020-07-21 13:44:00,336 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:44:00,488 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:44:00,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:44:00,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 13:44:00,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:44:00,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:44:00,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:44:00,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222549515] [2020-07-21 13:44:00,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:44:00,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 13:44:00,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153567262] [2020-07-21 13:44:00,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 13:44:00,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:44:00,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 13:44:00,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:44:00,559 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 5 states. [2020-07-21 13:44:00,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:44:00,622 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2020-07-21 13:44:00,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 13:44:00,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-21 13:44:00,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:44:00,624 INFO L225 Difference]: With dead ends: 62 [2020-07-21 13:44:00,624 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 13:44:00,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:44:00,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 13:44:00,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-07-21 13:44:00,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 13:44:00,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-07-21 13:44:00,642 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 20 [2020-07-21 13:44:00,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:44:00,643 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-07-21 13:44:00,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 13:44:00,643 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-07-21 13:44:00,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 13:44:00,645 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:44:00,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:44:00,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:44:00,856 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:44:00,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:44:00,857 INFO L82 PathProgramCache]: Analyzing trace with hash 215855051, now seen corresponding path program 1 times [2020-07-21 13:44:00,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:44:00,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324225580] [2020-07-21 13:44:00,859 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:44:00,976 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:44:00,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:44:00,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 13:44:00,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:44:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:44:00,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:44:00,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324225580] [2020-07-21 13:44:00,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:44:00,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:44:00,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422284716] [2020-07-21 13:44:00,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:44:01,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:44:01,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:44:01,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:44:01,000 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 3 states. [2020-07-21 13:44:01,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:44:01,034 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2020-07-21 13:44:01,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:44:01,034 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-21 13:44:01,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:44:01,036 INFO L225 Difference]: With dead ends: 69 [2020-07-21 13:44:01,036 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 13:44:01,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:44:01,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 13:44:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-21 13:44:01,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 13:44:01,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-07-21 13:44:01,045 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 27 [2020-07-21 13:44:01,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:44:01,045 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-07-21 13:44:01,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:44:01,045 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-07-21 13:44:01,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 13:44:01,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:44:01,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:44:01,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:44:01,260 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:44:01,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:44:01,261 INFO L82 PathProgramCache]: Analyzing trace with hash -795262199, now seen corresponding path program 1 times [2020-07-21 13:44:01,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:44:01,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352272603] [2020-07-21 13:44:01,262 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:44:01,397 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:44:01,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:44:01,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 13:44:01,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:44:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:44:01,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:44:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:44:01,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352272603] [2020-07-21 13:44:01,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:44:01,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-21 13:44:01,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299437410] [2020-07-21 13:44:01,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 13:44:01,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:44:01,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 13:44:01,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 13:44:01,560 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 9 states. [2020-07-21 13:44:01,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:44:01,615 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2020-07-21 13:44:01,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 13:44:01,616 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 13:44:01,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:44:01,617 INFO L225 Difference]: With dead ends: 69 [2020-07-21 13:44:01,617 INFO L226 Difference]: Without dead ends: 49 [2020-07-21 13:44:01,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-07-21 13:44:01,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-21 13:44:01,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-07-21 13:44:01,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 13:44:01,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-07-21 13:44:01,625 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 27 [2020-07-21 13:44:01,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:44:01,626 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-07-21 13:44:01,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 13:44:01,626 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-07-21 13:44:01,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 13:44:01,627 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:44:01,627 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:44:01,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:44:01,828 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:44:01,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:44:01,829 INFO L82 PathProgramCache]: Analyzing trace with hash 260011544, now seen corresponding path program 1 times [2020-07-21 13:44:01,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:44:01,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741213832] [2020-07-21 13:44:01,829 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:44:02,273 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:44:02,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:44:02,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 13:44:02,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:44:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:44:02,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:44:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:44:02,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741213832] [2020-07-21 13:44:02,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:44:02,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-07-21 13:44:02,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577911161] [2020-07-21 13:44:02,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 13:44:02,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:44:02,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 13:44:02,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-21 13:44:02,485 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 11 states. [2020-07-21 13:44:02,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:44:02,602 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2020-07-21 13:44:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:44:02,603 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-07-21 13:44:02,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:44:02,604 INFO L225 Difference]: With dead ends: 76 [2020-07-21 13:44:02,605 INFO L226 Difference]: Without dead ends: 56 [2020-07-21 13:44:02,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-07-21 13:44:02,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-21 13:44:02,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-07-21 13:44:02,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 13:44:02,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-07-21 13:44:02,623 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 34 [2020-07-21 13:44:02,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:44:02,624 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-07-21 13:44:02,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 13:44:02,626 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-07-21 13:44:02,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 13:44:02,627 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:44:02,627 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:44:02,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:44:02,828 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:44:02,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:44:02,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1408992297, now seen corresponding path program 2 times [2020-07-21 13:44:02,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:44:02,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518931430] [2020-07-21 13:44:02,830 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:44:08,414 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:44:08,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:44:08,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 13:44:08,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:44:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:44:08,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:44:08,670 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:44:08,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518931430] [2020-07-21 13:44:08,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:44:08,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-21 13:44:08,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275471644] [2020-07-21 13:44:08,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 13:44:08,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:44:08,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 13:44:08,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-07-21 13:44:08,673 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 13 states. [2020-07-21 13:44:08,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:44:08,746 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2020-07-21 13:44:08,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:44:08,746 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-07-21 13:44:08,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:44:08,748 INFO L225 Difference]: With dead ends: 83 [2020-07-21 13:44:08,748 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 13:44:08,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-07-21 13:44:08,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 13:44:08,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-21 13:44:08,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 13:44:08,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-07-21 13:44:08,756 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 41 [2020-07-21 13:44:08,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:44:08,756 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-07-21 13:44:08,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 13:44:08,757 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-07-21 13:44:08,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-21 13:44:08,758 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:44:08,758 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:44:08,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:44:08,968 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:44:08,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:44:08,969 INFO L82 PathProgramCache]: Analyzing trace with hash -2107133704, now seen corresponding path program 3 times [2020-07-21 13:44:08,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:44:08,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752580090] [2020-07-21 13:44:08,971 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:44:19,838 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:44:19,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:44:19,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:44:19,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:44:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:44:19,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:44:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:44:20,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752580090] [2020-07-21 13:44:20,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:44:20,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 13:44:20,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122700790] [2020-07-21 13:44:20,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 13:44:20,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:44:20,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 13:44:20,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-07-21 13:44:20,083 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 14 states. [2020-07-21 13:44:20,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:44:20,175 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2020-07-21 13:44:20,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:44:20,176 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-07-21 13:44:20,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:44:20,177 INFO L225 Difference]: With dead ends: 90 [2020-07-21 13:44:20,177 INFO L226 Difference]: Without dead ends: 70 [2020-07-21 13:44:20,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:44:20,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-21 13:44:20,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-07-21 13:44:20,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 13:44:20,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-07-21 13:44:20,185 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 48 [2020-07-21 13:44:20,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:44:20,186 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-07-21 13:44:20,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 13:44:20,186 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-07-21 13:44:20,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 13:44:20,187 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:44:20,188 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:44:20,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:44:20,389 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:44:20,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:44:20,390 INFO L82 PathProgramCache]: Analyzing trace with hash 893734217, now seen corresponding path program 4 times [2020-07-21 13:44:20,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:44:20,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447494237] [2020-07-21 13:44:20,391 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:45:21,811 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:45:21,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:45:21,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-21 13:45:21,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:45:21,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:45:21,998 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 16 treesize of output 17 [2020-07-21 13:45:21,998 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:45:22,011 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:45:22,012 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:45:22,012 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:23 [2020-07-21 13:45:22,044 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_85|], 10=[|v_#memory_int_87|]} [2020-07-21 13:45:22,051 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 13:45:22,076 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:45:22,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:45:22,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:45:22,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:45:22,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:45:22,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:45:22,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:45:22,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:45:22,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:45:22,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:45:22,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:45:22,099 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:45:22,100 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 41 [2020-07-21 13:45:22,102 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:45:22,115 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:45:22,116 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:45:22,117 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:66, output treesize:23 [2020-07-21 13:45:22,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:45:22,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:45:22,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:45:22,137 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:45:22,138 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2020-07-21 13:45:22,139 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:45:22,148 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:45:22,149 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:45:22,149 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:20 [2020-07-21 13:45:22,234 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 13:45:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 45 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 13:45:22,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:45:22,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:45:22,490 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 13:45:22,603 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 13:45:22,733 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 13:45:22,838 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 13:45:22,931 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 13:45:22,936 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:45:22,937 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-21 13:45:22,937 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:17 [2020-07-21 13:45:24,941 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_2 Int) (dll_create_~head~0.base Int)) (= 0 (select (select (store |c_#memory_int| dll_create_~head~0.base (store (select |c_#memory_int| dll_create_~head~0.base) (+ c_dll_create_~head~0.offset 12) v_DerPreprocessor_2)) c_dll_create_~new_head~0.base) c_dll_create_~new_head~0.offset))) is different from false [2020-07-21 13:45:24,950 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_85|], 3=[|v_#memory_int_114|]} [2020-07-21 13:45:24,954 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 13:45:24,968 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:45:24,970 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 13:45:24,985 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:45:24,986 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-07-21 13:45:24,987 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:63, output treesize:57 [2020-07-21 13:45:26,999 WARN L838 $PredicateComparison]: unable to prove that (forall ((|dll_create_#t~ite4| Int) (v_DerPreprocessor_4 Int) (v_DerPreprocessor_3 Int) (v_DerPreprocessor_2 Int) (dll_create_~head~0.base Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| c_dll_create_~new_head~0.base (store (store (store (select |c_#memory_int| c_dll_create_~new_head~0.base) (+ c_dll_create_~new_head~0.offset 16) |dll_create_#t~ite4|) (+ c_dll_create_~new_head~0.offset 4) v_DerPreprocessor_3) (+ c_dll_create_~new_head~0.offset 12) v_DerPreprocessor_4)))) (store .cse0 dll_create_~head~0.base (store (select .cse0 dll_create_~head~0.base) (+ c_dll_create_~head~0.offset 12) v_DerPreprocessor_2))) c_dll_create_~new_head~0.base) c_dll_create_~new_head~0.offset) 0)) is different from false [2020-07-21 13:45:27,023 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:45:27,133 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 14 [2020-07-21 13:45:27,134 INFO L624 ElimStorePlain]: treesize reduction 1296, result has 1.1 percent of original size [2020-07-21 13:45:27,135 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:45:27,135 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:73, output treesize:6 [2020-07-21 13:45:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 3 not checked. [2020-07-21 13:45:27,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447494237] [2020-07-21 13:45:27,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:45:27,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-07-21 13:45:27,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107192050] [2020-07-21 13:45:27,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 13:45:27,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:45:27,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 13:45:27,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=354, Unknown=2, NotChecked=78, Total=506 [2020-07-21 13:45:27,232 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 23 states. [2020-07-21 13:45:29,040 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| c_dll_create_~new_head~0.base))) (and (<= 0 c_dll_create_~head~0.offset) (= 0 (select .cse0 (+ c_dll_create_~new_head~0.offset 8))) (= 0 c_dll_create_~new_head~0.offset) (= 0 (select .cse0 c_dll_create_~new_head~0.offset)) (forall ((|dll_create_#t~ite4| Int) (v_DerPreprocessor_4 Int) (v_DerPreprocessor_3 Int) (v_DerPreprocessor_2 Int) (dll_create_~head~0.base Int)) (= (select (select (let ((.cse1 (store |c_#memory_int| c_dll_create_~new_head~0.base (store (store (store (select |c_#memory_int| c_dll_create_~new_head~0.base) (+ c_dll_create_~new_head~0.offset 16) |dll_create_#t~ite4|) (+ c_dll_create_~new_head~0.offset 4) v_DerPreprocessor_3) (+ c_dll_create_~new_head~0.offset 12) v_DerPreprocessor_4)))) (store .cse1 dll_create_~head~0.base (store (select .cse1 dll_create_~head~0.base) (+ c_dll_create_~head~0.offset 12) v_DerPreprocessor_2))) c_dll_create_~new_head~0.base) c_dll_create_~new_head~0.offset) 0)))) is different from false [2020-07-21 13:45:30,041 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| c_dll_create_~new_head~0.base))) (and (<= 0 c_dll_create_~head~0.offset) (= 0 (select .cse0 (+ c_dll_create_~new_head~0.offset 8))) (forall ((v_DerPreprocessor_2 Int) (dll_create_~head~0.base Int)) (= 0 (select (select (store |c_#memory_int| dll_create_~head~0.base (store (select |c_#memory_int| dll_create_~head~0.base) (+ c_dll_create_~head~0.offset 12) v_DerPreprocessor_2)) c_dll_create_~new_head~0.base) c_dll_create_~new_head~0.offset))) (= 0 c_dll_create_~new_head~0.offset) (= 0 (select .cse0 c_dll_create_~new_head~0.offset)))) is different from false [2020-07-21 13:45:32,105 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| c_dll_create_~new_head~0.base)) (.cse1 (select |c_#memory_int| c_dll_create_~head~0.base))) (and (<= 0 c_dll_create_~head~0.offset) (= 0 (select .cse0 (+ c_dll_create_~new_head~0.offset 8))) (= 0 c_dll_create_~new_head~0.offset) (= 0 c_dll_create_~head~0.offset) (= 0 (select .cse0 c_dll_create_~new_head~0.offset)) (= 0 (select .cse1 0)) (forall ((|dll_create_#t~ite4| Int) (v_DerPreprocessor_4 Int) (v_DerPreprocessor_3 Int) (v_DerPreprocessor_2 Int) (dll_create_~head~0.base Int)) (= (select (select (let ((.cse2 (store |c_#memory_int| c_dll_create_~new_head~0.base (store (store (store (select |c_#memory_int| c_dll_create_~new_head~0.base) (+ c_dll_create_~new_head~0.offset 16) |dll_create_#t~ite4|) (+ c_dll_create_~new_head~0.offset 4) v_DerPreprocessor_3) (+ c_dll_create_~new_head~0.offset 12) v_DerPreprocessor_4)))) (store .cse2 dll_create_~head~0.base (store (select .cse2 dll_create_~head~0.base) (+ c_dll_create_~head~0.offset 12) v_DerPreprocessor_2))) c_dll_create_~new_head~0.base) c_dll_create_~new_head~0.offset) 0)) (= 0 (select .cse1 8)))) is different from false [2020-07-21 13:45:32,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:45:32,314 INFO L93 Difference]: Finished difference Result 155 states and 193 transitions. [2020-07-21 13:45:32,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 13:45:32,315 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2020-07-21 13:45:32,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:45:32,318 INFO L225 Difference]: With dead ends: 155 [2020-07-21 13:45:32,319 INFO L226 Difference]: Without dead ends: 150 [2020-07-21 13:45:32,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=127, Invalid=488, Unknown=5, NotChecked=250, Total=870 [2020-07-21 13:45:32,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-07-21 13:45:32,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 107. [2020-07-21 13:45:32,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 13:45:32,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 135 transitions. [2020-07-21 13:45:32,334 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 135 transitions. Word has length 55 [2020-07-21 13:45:32,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:45:32,335 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 135 transitions. [2020-07-21 13:45:32,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 13:45:32,335 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 135 transitions. [2020-07-21 13:45:32,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 13:45:32,337 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:45:32,337 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:45:32,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:45:32,538 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:45:32,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:45:32,539 INFO L82 PathProgramCache]: Analyzing trace with hash 895583181, now seen corresponding path program 1 times [2020-07-21 13:45:32,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:45:32,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579996578] [2020-07-21 13:45:32,540 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:48:25,093 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:48:25,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 13:48:25,093 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 13:49:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 13:49:11,558 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 13:49:11,753 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 13:49:11,754 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 13:49:11,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:49:12,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:49:12 BoogieIcfgContainer [2020-07-21 13:49:12,005 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 13:49:12,007 INFO L168 Benchmark]: Toolchain (without parser) took 313922.36 ms. Allocated memory was 136.8 MB in the beginning and 282.1 MB in the end (delta: 145.2 MB). Free memory was 100.3 MB in the beginning and 157.8 MB in the end (delta: -57.5 MB). Peak memory consumption was 87.7 MB. Max. memory is 7.1 GB. [2020-07-21 13:49:12,008 INFO L168 Benchmark]: CDTParser took 0.68 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 13:49:12,009 INFO L168 Benchmark]: CACSL2BoogieTranslator took 743.84 ms. Allocated memory was 136.8 MB in the beginning and 205.0 MB in the end (delta: 68.2 MB). Free memory was 99.9 MB in the beginning and 171.8 MB in the end (delta: -71.9 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. [2020-07-21 13:49:12,009 INFO L168 Benchmark]: Boogie Preprocessor took 77.14 ms. Allocated memory is still 205.0 MB. Free memory was 171.8 MB in the beginning and 168.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-07-21 13:49:12,010 INFO L168 Benchmark]: RCFGBuilder took 673.24 ms. Allocated memory is still 205.0 MB. Free memory was 168.9 MB in the beginning and 122.8 MB in the end (delta: 46.1 MB). Peak memory consumption was 46.1 MB. Max. memory is 7.1 GB. [2020-07-21 13:49:12,011 INFO L168 Benchmark]: TraceAbstraction took 312421.24 ms. Allocated memory was 205.0 MB in the beginning and 282.1 MB in the end (delta: 77.1 MB). Free memory was 122.2 MB in the beginning and 157.8 MB in the end (delta: -35.7 MB). Peak memory consumption was 41.4 MB. Max. memory is 7.1 GB. [2020-07-21 13:49:12,014 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.68 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 743.84 ms. Allocated memory was 136.8 MB in the beginning and 205.0 MB in the end (delta: 68.2 MB). Free memory was 99.9 MB in the beginning and 171.8 MB in the end (delta: -71.9 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 77.14 ms. Allocated memory is still 205.0 MB. Free memory was 171.8 MB in the beginning and 168.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 673.24 ms. Allocated memory is still 205.0 MB. Free memory was 168.9 MB in the beginning and 122.8 MB in the end (delta: 46.1 MB). Peak memory consumption was 46.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 312421.24 ms. Allocated memory was 205.0 MB in the beginning and 282.1 MB in the end (delta: 77.1 MB). Free memory was 122.2 MB in the beginning and 157.8 MB in the end (delta: -35.7 MB). Peak memory consumption was 41.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 605]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L588] const int len = 5; VAL [len=5] [L589] CALL, EXPR dll_create(len) VAL [\old(len)=5] [L568] DLL head = ((void *)0); VAL [\old(len)=5, head={0:0}, len=5] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=5, __VERIFIER_nondet_int() == len? 1 : 0=1, head={0:0}, len=5, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L579] COND FALSE !(\read(head)) VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-4:0}, len=4, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-4:0}, len=4, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-4:0}, len=4, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=4, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-4:0}, len=4, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-4:0}, len=4, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={-4:0}, len=4, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-1:0}, len=3, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-1:0}, len=3, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-1:0}, len=3, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=3, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-1:0}, len=3, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-1:0}, len=3, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={-1:0}, len=3, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-5:0}, len=2, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-5:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-5:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=2, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-5:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-5:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={-5:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-2:0}, len=1, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-2:0}, len=1, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-2:0}, len=1, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=1, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-2:0}, len=1, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-2:0}, len=1, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={-2:0}, len=1, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-3:0}, len=0, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L569] COND FALSE !(len > 0) VAL [\old(len)=5, head={-3:0}, len=0, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L585] return head; VAL [\old(len)=5, \result={-3:0}, head={-3:0}, len=0, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L589] RET, EXPR dll_create(len) VAL [dll_create(len)={-3:0}, len=5] [L589] DLL head = dll_create(len); [L590] head->next VAL [head={-3:0}, head->next={-2:0}, len=5] [L590] COND TRUE head->next [L591] EXPR head->data_0 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] EXPR head->data_1 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 VAL [0 != head->data_0 || 0 != head->data_1=0, head={-3:0}, head->data_0=0, head->data_1=0, len=5] [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] EXPR head->data_2 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 VAL [0 != head->data_0 || 0 != head->data_1=0, 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2=1, head={-3:0}, head->data_0=0, head->data_1=0, head->data_2=1, len=5] [L591] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L605] __VERIFIER_error() VAL [head={-3:0}, len=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 312.3s, OverallIterations: 9, TraceHistogramMax: 5, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 296 SDtfs, 450 SDslu, 1138 SDs, 0 SdLazy, 503 SolverSat, 46 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 484 GetRequests, 396 SyntacticMatches, 9 SemanticMatches, 79 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 9.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=107occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 75 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 250.6s SatisfiabilityAnalysisTime, 6.4s InterpolantComputationTime, 327 NumberOfCodeBlocks, 314 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 464 ConstructedInterpolants, 3 QuantifiedInterpolants, 74204 SizeOfPredicates, 37 NumberOfNonLiveVariables, 1243 ConjunctsInSsa, 85 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 126/311 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...