/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 BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:46:02,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:46:02,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:46:02,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:46:02,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:46:02,844 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:46:02,846 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:46:02,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:46:02,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:46:02,863 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:46:02,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:46:02,865 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:46:02,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:46:02,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:46:02,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:46:02,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:46:02,874 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:46:02,875 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:46:02,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:46:02,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:46:02,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:46:02,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:46:02,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:46:02,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:46:02,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 22:46:02,896 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 22:46:02,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 22:46:02,899 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 22:46:02,899 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 22:46:02,901 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 22:46:02,901 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 22:46:02,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 22:46:02,903 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 22:46:02,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 22:46:02,907 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 22:46:02,907 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 22:46:02,908 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 22:46:02,908 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 22:46:02,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:46:02,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:46:02,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:46:02,911 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 22:46:02,930 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:46:02,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:46:02,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:46:02,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:46:02,933 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:46:02,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:46:02,933 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:46:02,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:46:02,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:46:02,934 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:46:02,935 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:46:02,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:46:02,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:46:02,936 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:46:02,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:46:02,936 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:46:02,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:46:02,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:46:02,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:46:02,937 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:46:02,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:46:02,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:46:02,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:46:02,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:46:02,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:46:02,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:46:02,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:46:02,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:46:02,939 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:46:02,939 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 -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 22:46:03,269 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:46:03,286 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:46:03,291 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:46:03,292 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:46:03,292 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:46:03,293 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-07-21 22:46:03,359 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4766ce8b/8dc47f778816478da39e9dbb1944514d/FLAG9da2e58fd [2020-07-21 22:46:03,925 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:46:03,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-07-21 22:46:03,937 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4766ce8b/8dc47f778816478da39e9dbb1944514d/FLAG9da2e58fd [2020-07-21 22:46:04,185 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4766ce8b/8dc47f778816478da39e9dbb1944514d [2020-07-21 22:46:04,193 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:46:04,195 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:46:04,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:46:04,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:46:04,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:46:04,201 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:46:04" (1/1) ... [2020-07-21 22:46:04,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b9ef9d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:46:04, skipping insertion in model container [2020-07-21 22:46:04,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:46:04" (1/1) ... [2020-07-21 22:46:04,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:46:04,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:46:04,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:46:04,712 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:46:04,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:46:04,812 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:46:04,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:46:04 WrapperNode [2020-07-21 22:46:04,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:46:04,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:46:04,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:46:04,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:46:04,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:46:04" (1/1) ... [2020-07-21 22:46:04,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:46:04" (1/1) ... [2020-07-21 22:46:04,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:46:04" (1/1) ... [2020-07-21 22:46:04,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:46:04" (1/1) ... [2020-07-21 22:46:04,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:46:04" (1/1) ... [2020-07-21 22:46:04,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:46:04" (1/1) ... [2020-07-21 22:46:04,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:46:04" (1/1) ... [2020-07-21 22:46:04,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:46:04,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:46:04,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:46:04,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:46:04,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:46:04" (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 22:46:04,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:46:04,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:46:04,945 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-21 22:46:04,945 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-21 22:46:04,945 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-21 22:46:04,945 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-07-21 22:46:04,945 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:46:04,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:46:04,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:46:04,946 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-21 22:46:04,946 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-21 22:46:04,946 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 22:46:04,946 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 22:46:04,947 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 22:46:04,947 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 22:46:04,947 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 22:46:04,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 22:46:04,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 22:46:04,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 22:46:04,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 22:46:04,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 22:46:04,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 22:46:04,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 22:46:04,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 22:46:04,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 22:46:04,949 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 22:46:04,949 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 22:46:04,949 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 22:46:04,949 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 22:46:04,949 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 22:46:04,949 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 22:46:04,950 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 22:46:04,950 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 22:46:04,950 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 22:46:04,950 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 22:46:04,950 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 22:46:04,950 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 22:46:04,950 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 22:46:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 22:46:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 22:46:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 22:46:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 22:46:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 22:46:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 22:46:04,952 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 22:46:04,952 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 22:46:04,952 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 22:46:04,952 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 22:46:04,952 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 22:46:04,952 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 22:46:04,952 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 22:46:04,953 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 22:46:04,953 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 22:46:04,953 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 22:46:04,953 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 22:46:04,953 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 22:46:04,953 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 22:46:04,954 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 22:46:04,954 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 22:46:04,954 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 22:46:04,954 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 22:46:04,954 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 22:46:04,954 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 22:46:04,955 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 22:46:04,955 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 22:46:04,955 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 22:46:04,955 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 22:46:04,955 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 22:46:04,955 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 22:46:04,955 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 22:46:04,956 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 22:46:04,956 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 22:46:04,956 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 22:46:04,956 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 22:46:04,956 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 22:46:04,956 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 22:46:04,957 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 22:46:04,957 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 22:46:04,957 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 22:46:04,957 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 22:46:04,957 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 22:46:04,957 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 22:46:04,958 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 22:46:04,958 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 22:46:04,958 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 22:46:04,958 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 22:46:04,958 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 22:46:04,958 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 22:46:04,958 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 22:46:04,959 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 22:46:04,959 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 22:46:04,959 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 22:46:04,959 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 22:46:04,959 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 22:46:04,959 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 22:46:04,959 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 22:46:04,960 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 22:46:04,960 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 22:46:04,960 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 22:46:04,960 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 22:46:04,960 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 22:46:04,960 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 22:46:04,960 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 22:46:04,961 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 22:46:04,961 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 22:46:04,961 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 22:46:04,961 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 22:46:04,961 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 22:46:04,961 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 22:46:04,961 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 22:46:04,962 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 22:46:04,962 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 22:46:04,962 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 22:46:04,962 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 22:46:04,962 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-21 22:46:04,962 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-07-21 22:46:04,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 22:46:04,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 22:46:04,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 22:46:04,963 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:46:04,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 22:46:04,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 22:46:04,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 22:46:04,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:46:04,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:46:05,289 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-21 22:46:05,481 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:46:05,481 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 22:46:05,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:46:05 BoogieIcfgContainer [2020-07-21 22:46:05,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:46:05,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:46:05,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:46:05,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:46:05,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:46:04" (1/3) ... [2020-07-21 22:46:05,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c35d749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:46:05, skipping insertion in model container [2020-07-21 22:46:05,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:46:04" (2/3) ... [2020-07-21 22:46:05,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c35d749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:46:05, skipping insertion in model container [2020-07-21 22:46:05,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:46:05" (3/3) ... [2020-07-21 22:46:05,494 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-07-21 22:46:05,504 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:46:05,512 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:46:05,525 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:46:05,547 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:46:05,547 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:46:05,547 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:46:05,547 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:46:05,548 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:46:05,548 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:46:05,548 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:46:05,548 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:46:05,564 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-07-21 22:46:05,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 22:46:05,569 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:46:05,570 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 22:46:05,570 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:46:05,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:46:05,576 INFO L82 PathProgramCache]: Analyzing trace with hash 248267832, now seen corresponding path program 1 times [2020-07-21 22:46:05,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:46:05,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110070542] [2020-07-21 22:46:05,586 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:46:05,806 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:46:05,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:46:05,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:46:05,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:46:05,897 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 22:46:05,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:46:05,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110070542] [2020-07-21 22:46:05,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:46:05,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:46:05,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443555341] [2020-07-21 22:46:05,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:46:05,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:46:05,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:46:05,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:46:05,926 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 5 states. [2020-07-21 22:46:06,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:46:06,014 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2020-07-21 22:46:06,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:46:06,016 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-21 22:46:06,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:46:06,025 INFO L225 Difference]: With dead ends: 73 [2020-07-21 22:46:06,025 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 22:46:06,029 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 22:46:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 22:46:06,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-07-21 22:46:06,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 22:46:06,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2020-07-21 22:46:06,071 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 20 [2020-07-21 22:46:06,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:46:06,072 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2020-07-21 22:46:06,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:46:06,072 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2020-07-21 22:46:06,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 22:46:06,073 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:46:06,074 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 22:46:06,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:46:06,291 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:46:06,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:46:06,291 INFO L82 PathProgramCache]: Analyzing trace with hash 215856973, now seen corresponding path program 1 times [2020-07-21 22:46:06,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:46:06,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335734789] [2020-07-21 22:46:06,292 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:46:06,415 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:46:06,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:46:06,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 22:46:06,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:46:06,438 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 22:46:06,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:46:06,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335734789] [2020-07-21 22:46:06,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:46:06,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:46:06,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718001410] [2020-07-21 22:46:06,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:46:06,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:46:06,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:46:06,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:46:06,442 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 3 states. [2020-07-21 22:46:06,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:46:06,473 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2020-07-21 22:46:06,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:46:06,474 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-21 22:46:06,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:46:06,475 INFO L225 Difference]: With dead ends: 63 [2020-07-21 22:46:06,475 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 22:46:06,477 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 22:46:06,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 22:46:06,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-07-21 22:46:06,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 22:46:06,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2020-07-21 22:46:06,484 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 27 [2020-07-21 22:46:06,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:46:06,484 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2020-07-21 22:46:06,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:46:06,485 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2020-07-21 22:46:06,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 22:46:06,486 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:46:06,486 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 22:46:06,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:46:06,700 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:46:06,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:46:06,700 INFO L82 PathProgramCache]: Analyzing trace with hash -795260277, now seen corresponding path program 1 times [2020-07-21 22:46:06,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:46:06,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677826490] [2020-07-21 22:46:06,702 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:46:06,853 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:46:06,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:46:06,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 22:46:06,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:46:06,897 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 22:46:06,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:46:07,019 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 22:46:07,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677826490] [2020-07-21 22:46:07,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:46:07,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-21 22:46:07,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310710756] [2020-07-21 22:46:07,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 22:46:07,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:46:07,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 22:46:07,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 22:46:07,022 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 9 states. [2020-07-21 22:46:07,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:46:07,092 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2020-07-21 22:46:07,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:46:07,093 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 22:46:07,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:46:07,095 INFO L225 Difference]: With dead ends: 63 [2020-07-21 22:46:07,095 INFO L226 Difference]: Without dead ends: 46 [2020-07-21 22:46:07,096 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 22:46:07,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-21 22:46:07,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-07-21 22:46:07,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 22:46:07,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-07-21 22:46:07,103 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2020-07-21 22:46:07,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:46:07,104 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-07-21 22:46:07,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 22:46:07,104 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-07-21 22:46:07,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 22:46:07,105 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:46:07,105 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 22:46:07,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:46:07,320 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:46:07,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:46:07,320 INFO L82 PathProgramCache]: Analyzing trace with hash 260013466, now seen corresponding path program 1 times [2020-07-21 22:46:07,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:46:07,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071891749] [2020-07-21 22:46:07,322 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:46:07,554 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:46:07,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:46:07,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:46:07,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:46:07,597 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 22:46:07,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:46:07,714 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 22:46:07,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071891749] [2020-07-21 22:46:07,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:46:07,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-07-21 22:46:07,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719027375] [2020-07-21 22:46:07,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 22:46:07,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:46:07,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 22:46:07,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:46:07,718 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 11 states. [2020-07-21 22:46:07,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:46:07,807 INFO L93 Difference]: Finished difference Result 70 states and 91 transitions. [2020-07-21 22:46:07,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:46:07,809 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-07-21 22:46:07,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:46:07,811 INFO L225 Difference]: With dead ends: 70 [2020-07-21 22:46:07,811 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 22:46:07,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:46:07,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 22:46:07,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-07-21 22:46:07,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 22:46:07,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2020-07-21 22:46:07,821 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 34 [2020-07-21 22:46:07,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:46:07,822 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2020-07-21 22:46:07,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 22:46:07,822 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2020-07-21 22:46:07,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 22:46:07,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:46:07,827 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 22:46:08,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:46:08,041 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:46:08,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:46:08,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1408994219, now seen corresponding path program 2 times [2020-07-21 22:46:08,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:46:08,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381126410] [2020-07-21 22:46:08,044 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:46:08,420 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:46:08,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:46:08,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 22:46:08,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:46:08,476 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 22:46:08,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:46:08,611 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 22:46:08,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381126410] [2020-07-21 22:46:08,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:46:08,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-21 22:46:08,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435417676] [2020-07-21 22:46:08,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:46:08,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:46:08,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:46:08,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:46:08,614 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand 13 states. [2020-07-21 22:46:08,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:46:08,709 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2020-07-21 22:46:08,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:46:08,710 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-07-21 22:46:08,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:46:08,711 INFO L225 Difference]: With dead ends: 77 [2020-07-21 22:46:08,711 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 22:46:08,712 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 22:46:08,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 22:46:08,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-21 22:46:08,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 22:46:08,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2020-07-21 22:46:08,719 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 41 [2020-07-21 22:46:08,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:46:08,720 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2020-07-21 22:46:08,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:46:08,720 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2020-07-21 22:46:08,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-21 22:46:08,721 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:46:08,721 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 22:46:08,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:46:08,925 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:46:08,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:46:08,926 INFO L82 PathProgramCache]: Analyzing trace with hash -2107131782, now seen corresponding path program 3 times [2020-07-21 22:46:08,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:46:08,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552924980] [2020-07-21 22:46:08,927 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:46:16,641 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:46:16,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:46:16,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:46:16,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:46:16,667 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:46:16,680 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-07-21 22:46:16,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:46:16,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552924980] [2020-07-21 22:46:16,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:46:16,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 22:46:16,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418920359] [2020-07-21 22:46:16,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 22:46:16,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:46:16,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 22:46:16,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 22:46:16,682 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 4 states. [2020-07-21 22:46:16,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:46:16,708 INFO L93 Difference]: Finished difference Result 71 states and 94 transitions. [2020-07-21 22:46:16,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:46:16,708 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-07-21 22:46:16,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:46:16,713 INFO L225 Difference]: With dead ends: 71 [2020-07-21 22:46:16,713 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 22:46:16,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 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 22:46:16,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 22:46:16,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-07-21 22:46:16,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 22:46:16,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-07-21 22:46:16,732 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 48 [2020-07-21 22:46:16,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:46:16,733 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-07-21 22:46:16,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 22:46:16,733 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-07-21 22:46:16,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-21 22:46:16,734 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:46:16,736 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 22:46:16,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:46:16,937 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:46:16,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:46:16,938 INFO L82 PathProgramCache]: Analyzing trace with hash -2107133704, now seen corresponding path program 1 times [2020-07-21 22:46:16,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:46:16,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331955358] [2020-07-21 22:46:16,939 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:46:24,623 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:46:24,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:46:24,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:46:24,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:46:24,705 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 22:46:24,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:46:24,885 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 22:46:24,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331955358] [2020-07-21 22:46:24,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:46:24,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 22:46:24,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657477902] [2020-07-21 22:46:24,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 22:46:24,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:46:24,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 22:46:24,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:46:24,888 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 14 states. [2020-07-21 22:46:24,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:46:24,970 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2020-07-21 22:46:24,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:46:24,971 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-07-21 22:46:24,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:46:24,973 INFO L225 Difference]: With dead ends: 90 [2020-07-21 22:46:24,973 INFO L226 Difference]: Without dead ends: 70 [2020-07-21 22:46:24,975 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 22:46:24,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-21 22:46:24,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-07-21 22:46:24,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 22:46:24,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-07-21 22:46:24,986 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 48 [2020-07-21 22:46:24,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:46:24,986 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-07-21 22:46:24,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 22:46:24,986 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-07-21 22:46:24,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 22:46:24,989 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:46:24,989 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 22:46:25,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:46:25,191 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:46:25,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:46:25,191 INFO L82 PathProgramCache]: Analyzing trace with hash 893734217, now seen corresponding path program 2 times [2020-07-21 22:46:25,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:46:25,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51219060] [2020-07-21 22:46:25,193 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:47:00,620 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:47:00,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:47:00,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-21 22:47:00,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:47:00,699 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-21 22:47:00,699 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:47:00,703 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:47:00,703 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:47:00,703 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-21 22:47:00,727 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:47:00,728 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-21 22:47:00,729 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:47:00,730 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:47:00,730 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:47:00,730 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:4 [2020-07-21 22:47:00,754 INFO L350 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-07-21 22:47:00,755 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 1 case distinctions, treesize of input 16 treesize of output 17 [2020-07-21 22:47:00,755 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:47:00,759 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:47:00,760 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:47:00,760 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:21 [2020-07-21 22:47:00,780 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_85|], 10=[|v_#memory_int_87|]} [2020-07-21 22:47:00,786 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 22:47:00,802 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:47:00,864 INFO L350 Elim1Store]: treesize reduction 288, result has 10.8 percent of original size [2020-07-21 22:47:00,865 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 41 [2020-07-21 22:47:00,866 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 22:47:00,874 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:47:00,875 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 22:47:00,876 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:64, output treesize:21 [2020-07-21 22:47:00,891 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-07-21 22:47:00,891 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 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 22:47:00,892 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:47:00,898 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:47:00,899 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 22:47:00,899 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:17 [2020-07-21 22:47:00,978 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 22:47:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-21 22:47:00,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:47:01,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:47:01,203 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:47:01,314 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 22:47:01,542 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 22:47:01,545 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:47:01,546 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 22:47:01,546 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:17 [2020-07-21 22:47:02,025 WARN L838 $PredicateComparison]: unable to prove that (forall ((dll_create_~head~0.offset Int) (v_DerPreprocessor_2 Int)) (= 0 (select (select (store |c_#memory_int| c_dll_create_~head~0.base (store (select |c_#memory_int| c_dll_create_~head~0.base) (+ 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 22:47:02,030 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_85|], 3=[|v_#memory_int_114|]} [2020-07-21 22:47:02,037 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 22:47:02,050 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:47:02,058 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 22:47:02,064 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:47:02,065 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 22:47:02,065 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:63, output treesize:57 [2020-07-21 22:47:03,189 WARN L838 $PredicateComparison]: unable to prove that (forall ((|dll_create_#t~ite4| Int) (v_DerPreprocessor_4 Int) (v_DerPreprocessor_3 Int) (dll_create_~head~0.offset Int) (v_DerPreprocessor_2 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 c_dll_create_~head~0.base (store (select .cse0 c_dll_create_~head~0.base) (+ 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 22:47:03,207 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:47:03,343 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 14 [2020-07-21 22:47:03,344 INFO L624 ElimStorePlain]: treesize reduction 1296, result has 1.1 percent of original size [2020-07-21 22:47:03,345 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 22:47:03,345 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:73, output treesize:4 [2020-07-21 22:47:03,394 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 22:47:03,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51219060] [2020-07-21 22:47:03,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:47:03,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2020-07-21 22:47:03,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638584369] [2020-07-21 22:47:03,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:47:03,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:47:03,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:47:03,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=299, Unknown=2, NotChecked=70, Total=420 [2020-07-21 22:47:03,397 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 21 states. [2020-07-21 22:47:03,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:47:03,901 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2020-07-21 22:47:03,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:47:03,902 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-07-21 22:47:03,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:47:03,903 INFO L225 Difference]: With dead ends: 83 [2020-07-21 22:47:03,903 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 22:47:03,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=109, Invalid=497, Unknown=2, NotChecked=94, Total=702 [2020-07-21 22:47:03,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 22:47:03,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2020-07-21 22:47:03,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 22:47:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2020-07-21 22:47:03,913 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 55 [2020-07-21 22:47:03,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:47:03,914 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2020-07-21 22:47:03,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:47:03,914 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2020-07-21 22:47:03,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 22:47:03,915 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:47:03,915 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 22:47:04,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:47:04,117 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:47:04,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:47:04,118 INFO L82 PathProgramCache]: Analyzing trace with hash 895583181, now seen corresponding path program 1 times [2020-07-21 22:47:04,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:47:04,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78327669] [2020-07-21 22:47:04,119 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:48:01,774 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:48:01,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 22:48:01,775 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:49:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 22:49:04,295 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:49:04,533 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 22:49:04,533 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 22:49:04,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:49:04,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:49:04 BoogieIcfgContainer [2020-07-21 22:49:04,787 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:49:04,789 INFO L168 Benchmark]: Toolchain (without parser) took 180594.55 ms. Allocated memory was 138.4 MB in the beginning and 282.1 MB in the end (delta: 143.7 MB). Free memory was 100.1 MB in the beginning and 121.3 MB in the end (delta: -21.3 MB). Peak memory consumption was 122.4 MB. Max. memory is 7.1 GB. [2020-07-21 22:49:04,790 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 22:49:04,790 INFO L168 Benchmark]: CACSL2BoogieTranslator took 616.97 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 99.8 MB in the beginning and 166.9 MB in the end (delta: -67.1 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. [2020-07-21 22:49:04,791 INFO L168 Benchmark]: Boogie Preprocessor took 67.48 ms. Allocated memory is still 200.8 MB. Free memory was 166.9 MB in the beginning and 163.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-07-21 22:49:04,792 INFO L168 Benchmark]: RCFGBuilder took 603.85 ms. Allocated memory is still 200.8 MB. Free memory was 163.9 MB in the beginning and 117.5 MB in the end (delta: 46.4 MB). Peak memory consumption was 46.4 MB. Max. memory is 7.1 GB. [2020-07-21 22:49:04,792 INFO L168 Benchmark]: TraceAbstraction took 179300.74 ms. Allocated memory was 200.8 MB in the beginning and 282.1 MB in the end (delta: 81.3 MB). Free memory was 117.5 MB in the beginning and 121.3 MB in the end (delta: -3.8 MB). Peak memory consumption was 77.5 MB. Max. memory is 7.1 GB. [2020-07-21 22:49:04,796 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 616.97 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 99.8 MB in the beginning and 166.9 MB in the end (delta: -67.1 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 67.48 ms. Allocated memory is still 200.8 MB. Free memory was 166.9 MB in the beginning and 163.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 603.85 ms. Allocated memory is still 200.8 MB. Free memory was 163.9 MB in the beginning and 117.5 MB in the end (delta: 46.4 MB). Peak memory consumption was 46.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 179300.74 ms. Allocated memory was 200.8 MB in the beginning and 282.1 MB in the end (delta: 81.3 MB). Free memory was 117.5 MB in the beginning and 121.3 MB in the end (delta: -3.8 MB). Peak memory consumption was 77.5 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))={27532:0}, new_head={27532:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={27532:0}, new_head={27532:0}] [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))={27532:0}, new_head={27532:0}] [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))={27532:0}, new_head={27532:0}] [L579] COND FALSE !(\read(head)) VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={27532:0}, new_head={27532:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={27532:0}, len=4, malloc(sizeof(struct node))={27532:0}, new_head={27532:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={27532:0}, len=4, malloc(sizeof(struct node))={27530:0}, new_head={27530:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={27532:0}, len=4, malloc(sizeof(struct node))={27530:0}, new_head={27530:0}] [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={27532:0}, len=4, malloc(sizeof(struct node))={27530:0}, new_head={27530:0}] [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={27532:0}, len=4, malloc(sizeof(struct node))={27530:0}, new_head={27530:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={27532:0}, len=4, malloc(sizeof(struct node))={27530:0}, new_head={27530:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={27530:0}, len=3, malloc(sizeof(struct node))={27530:0}, new_head={27530:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={27530:0}, len=3, malloc(sizeof(struct node))={27531:0}, new_head={27531:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={27530:0}, len=3, malloc(sizeof(struct node))={27531:0}, new_head={27531:0}] [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={27530:0}, len=3, malloc(sizeof(struct node))={27531:0}, new_head={27531:0}] [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={27530:0}, len=3, malloc(sizeof(struct node))={27531:0}, new_head={27531:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={27530:0}, len=3, malloc(sizeof(struct node))={27531:0}, new_head={27531:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={27531:0}, len=2, malloc(sizeof(struct node))={27531:0}, new_head={27531:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={27531:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={27531:0}, 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={27531:0}, 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={27531:0}, 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={27531:0}, 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))={-1:0}, new_head={-1:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-2:0}, len=1, 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()=1, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-2:0}, len=1, 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={-2:0}, len=1, 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={-2:0}, len=1, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-1:0}, len=0, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L569] COND FALSE !(len > 0) VAL [\old(len)=5, head={-1:0}, len=0, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L585] return head; VAL [\old(len)=5, \result={-1:0}, head={-1:0}, len=0, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L589] RET, EXPR dll_create(len) VAL [dll_create(len)={-1:0}, len=5] [L589] DLL head = dll_create(len); [L590] head->next VAL [head={-1:0}, 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={-1:0}, 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={-1:0}, 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={-1:0}, len=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 179.1s, OverallIterations: 9, TraceHistogramMax: 5, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 292 SDtfs, 458 SDslu, 1202 SDs, 0 SdLazy, 500 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 514 GetRequests, 428 SyntacticMatches, 10 SemanticMatches, 76 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred 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, 43 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 108.7s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 355 NumberOfCodeBlocks, 311 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 492 ConstructedInterpolants, 3 QuantifiedInterpolants, 75080 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1361 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 183/357 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...