/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 DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:03:00,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:03:00,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:03:00,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:03:00,707 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:03:00,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:03:00,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:03:00,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:03:00,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:03:00,729 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:03:00,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:03:00,732 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:03:00,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:03:00,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:03:00,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:03:00,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:03:00,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:03:00,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:03:00,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:03:00,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:03:00,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:03:00,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:03:00,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:03:00,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:03:00,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 20:03:00,757 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 20:03:00,757 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 20:03:00,758 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 20:03:00,759 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 20:03:00,759 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 20:03:00,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 20:03:00,760 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 20:03:00,761 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 20:03:00,762 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 20:03:00,763 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 20:03:00,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 20:03:00,764 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 20:03:00,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 20:03:00,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:03:00,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:03:00,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:03:00,766 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 20:03:00,780 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:03:00,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:03:00,782 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:03:00,782 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:03:00,782 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:03:00,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:03:00,783 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:03:00,783 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:03:00,783 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:03:00,783 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:03:00,783 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:03:00,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:03:00,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:03:00,784 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:03:00,784 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:03:00,784 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:03:00,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:03:00,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:03:00,785 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:03:00,785 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:03:00,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:03:00,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:03:00,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:03:00,786 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:03:00,786 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:03:00,786 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:03:00,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:03:00,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:03:00,787 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:03:00,787 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 -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 20:03:01,078 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:03:01,092 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:03:01,096 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:03:01,097 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:03:01,098 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:03:01,098 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-07-21 20:03:01,164 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/797b7e00d/df9a6de1030742b6b4fea65f220edf3c/FLAG861f31834 [2020-07-21 20:03:01,759 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:03:01,760 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-07-21 20:03:01,775 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/797b7e00d/df9a6de1030742b6b4fea65f220edf3c/FLAG861f31834 [2020-07-21 20:03:01,986 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/797b7e00d/df9a6de1030742b6b4fea65f220edf3c [2020-07-21 20:03:01,996 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:03:01,999 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:03:02,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:03:02,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:03:02,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:03:02,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:03:01" (1/1) ... [2020-07-21 20:03:02,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@977a087 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:03:02, skipping insertion in model container [2020-07-21 20:03:02,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:03:01" (1/1) ... [2020-07-21 20:03:02,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:03:02,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:03:02,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:03:02,505 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:03:02,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:03:02,665 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:03:02,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:03:02 WrapperNode [2020-07-21 20:03:02,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:03:02,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:03:02,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:03:02,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:03:02,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:03:02" (1/1) ... [2020-07-21 20:03:02,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:03:02" (1/1) ... [2020-07-21 20:03:02,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:03:02" (1/1) ... [2020-07-21 20:03:02,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:03:02" (1/1) ... [2020-07-21 20:03:02,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:03:02" (1/1) ... [2020-07-21 20:03:02,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:03:02" (1/1) ... [2020-07-21 20:03:02,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:03:02" (1/1) ... [2020-07-21 20:03:02,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:03:02,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:03:02,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:03:02,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:03:02,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:03:02" (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 20:03:02,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:03:02,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:03:02,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-21 20:03:02,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-21 20:03:02,829 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-21 20:03:02,829 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-07-21 20:03:02,829 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:03:02,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:03:02,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:03:02,830 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-21 20:03:02,830 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-21 20:03:02,830 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 20:03:02,830 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 20:03:02,830 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 20:03:02,831 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 20:03:02,831 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 20:03:02,831 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 20:03:02,831 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 20:03:02,831 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 20:03:02,831 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 20:03:02,831 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 20:03:02,832 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 20:03:02,832 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 20:03:02,832 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 20:03:02,832 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 20:03:02,832 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 20:03:02,832 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 20:03:02,832 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 20:03:02,832 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 20:03:02,833 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 20:03:02,833 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 20:03:02,833 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 20:03:02,833 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 20:03:02,833 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 20:03:02,833 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 20:03:02,834 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 20:03:02,834 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 20:03:02,834 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 20:03:02,834 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 20:03:02,834 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 20:03:02,834 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 20:03:02,835 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 20:03:02,835 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 20:03:02,835 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 20:03:02,835 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 20:03:02,835 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 20:03:02,835 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 20:03:02,835 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 20:03:02,836 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 20:03:02,836 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 20:03:02,836 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 20:03:02,836 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 20:03:02,836 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 20:03:02,836 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 20:03:02,837 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 20:03:02,837 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 20:03:02,837 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 20:03:02,837 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 20:03:02,837 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 20:03:02,837 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 20:03:02,838 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 20:03:02,838 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 20:03:02,838 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 20:03:02,838 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 20:03:02,838 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 20:03:02,838 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 20:03:02,839 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 20:03:02,839 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 20:03:02,839 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 20:03:02,839 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 20:03:02,839 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 20:03:02,839 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 20:03:02,840 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 20:03:02,840 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 20:03:02,840 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 20:03:02,840 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 20:03:02,840 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 20:03:02,840 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 20:03:02,840 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 20:03:02,841 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 20:03:02,841 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 20:03:02,841 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 20:03:02,841 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 20:03:02,841 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 20:03:02,841 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 20:03:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 20:03:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 20:03:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 20:03:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 20:03:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 20:03:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 20:03:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 20:03:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 20:03:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 20:03:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 20:03:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 20:03:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 20:03:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 20:03:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 20:03:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 20:03:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 20:03:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 20:03:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 20:03:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 20:03:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 20:03:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 20:03:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 20:03:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 20:03:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 20:03:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 20:03:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 20:03:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 20:03:02,846 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 20:03:02,846 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 20:03:02,846 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-21 20:03:02,846 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-07-21 20:03:02,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 20:03:02,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 20:03:02,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 20:03:02,847 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:03:02,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 20:03:02,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 20:03:02,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 20:03:02,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:03:02,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:03:03,145 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-21 20:03:03,390 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:03:03,390 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 20:03:03,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:03:03 BoogieIcfgContainer [2020-07-21 20:03:03,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:03:03,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:03:03,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:03:03,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:03:03,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:03:01" (1/3) ... [2020-07-21 20:03:03,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@462b36a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:03:03, skipping insertion in model container [2020-07-21 20:03:03,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:03:02" (2/3) ... [2020-07-21 20:03:03,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@462b36a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:03:03, skipping insertion in model container [2020-07-21 20:03:03,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:03:03" (3/3) ... [2020-07-21 20:03:03,404 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-07-21 20:03:03,416 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:03:03,426 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:03:03,441 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:03:03,467 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:03:03,467 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:03:03,468 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:03:03,468 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:03:03,468 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:03:03,468 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:03:03,468 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:03:03,469 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:03:03,485 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-07-21 20:03:03,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 20:03:03,492 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:03:03,493 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 20:03:03,493 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:03:03,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:03:03,499 INFO L82 PathProgramCache]: Analyzing trace with hash 248267832, now seen corresponding path program 1 times [2020-07-21 20:03:03,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:03:03,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628834283] [2020-07-21 20:03:03,508 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:03:03,747 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:03:03,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:03:03,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:03:03,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:03:03,821 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:03:03,837 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 20:03:03,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:03:03,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628834283] [2020-07-21 20:03:03,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:03:03,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 20:03:03,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066243784] [2020-07-21 20:03:03,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 20:03:03,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:03:03,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 20:03:03,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 20:03:03,866 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-07-21 20:03:03,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:03:03,958 INFO L93 Difference]: Finished difference Result 66 states and 92 transitions. [2020-07-21 20:03:03,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:03:03,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-07-21 20:03:03,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:03:03,977 INFO L225 Difference]: With dead ends: 66 [2020-07-21 20:03:03,977 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 20:03:03,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:03:04,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 20:03:04,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-07-21 20:03:04,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 20:03:04,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2020-07-21 20:03:04,030 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 20 [2020-07-21 20:03:04,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:03:04,031 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2020-07-21 20:03:04,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 20:03:04,031 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2020-07-21 20:03:04,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 20:03:04,032 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:03:04,032 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 20:03:04,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:03:04,248 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:03:04,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:03:04,249 INFO L82 PathProgramCache]: Analyzing trace with hash 248265910, now seen corresponding path program 1 times [2020-07-21 20:03:04,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:03:04,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359276294] [2020-07-21 20:03:04,251 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:03:04,348 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:03:04,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:03:04,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 20:03:04,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:03:04,388 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 20:03:04,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:03:04,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359276294] [2020-07-21 20:03:04,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:03:04,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 20:03:04,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576335890] [2020-07-21 20:03:04,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:03:04,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:03:04,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:03:04,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:03:04,392 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 5 states. [2020-07-21 20:03:04,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:03:04,438 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2020-07-21 20:03:04,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:03:04,439 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-21 20:03:04,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:03:04,440 INFO L225 Difference]: With dead ends: 62 [2020-07-21 20:03:04,441 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 20:03:04,442 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 20:03:04,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 20:03:04,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-07-21 20:03:04,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 20:03:04,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-07-21 20:03:04,449 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 20 [2020-07-21 20:03:04,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:03:04,450 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-07-21 20:03:04,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:03:04,450 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-07-21 20:03:04,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 20:03:04,451 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:03:04,451 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 20:03:04,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:03:04,666 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:03:04,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:03:04,667 INFO L82 PathProgramCache]: Analyzing trace with hash 215855051, now seen corresponding path program 1 times [2020-07-21 20:03:04,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:03:04,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166485215] [2020-07-21 20:03:04,669 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:03:04,780 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:03:04,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:03:04,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 20:03:04,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:03:04,802 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 20:03:04,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:03:04,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166485215] [2020-07-21 20:03:04,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:03:04,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:03:04,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195981649] [2020-07-21 20:03:04,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:03:04,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:03:04,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:03:04,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:03:04,805 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 3 states. [2020-07-21 20:03:04,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:03:04,837 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2020-07-21 20:03:04,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:03:04,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-21 20:03:04,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:03:04,839 INFO L225 Difference]: With dead ends: 69 [2020-07-21 20:03:04,840 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 20:03:04,840 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 20:03:04,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 20:03:04,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-21 20:03:04,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 20:03:04,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-07-21 20:03:04,848 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 27 [2020-07-21 20:03:04,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:03:04,848 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-07-21 20:03:04,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:03:04,849 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-07-21 20:03:04,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 20:03:04,850 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:03:04,850 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 20:03:05,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:03:05,063 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:03:05,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:03:05,064 INFO L82 PathProgramCache]: Analyzing trace with hash -795262199, now seen corresponding path program 1 times [2020-07-21 20:03:05,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:03:05,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749202574] [2020-07-21 20:03:05,065 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:03:05,192 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:03:05,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:03:05,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 20:03:05,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:03:05,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:03:05,278 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2020-07-21 20:03:05,279 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:03:05,334 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:03:05,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:03:05,342 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2020-07-21 20:03:05,342 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 20:03:05,358 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:03:05,358 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:03:05,359 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2020-07-21 20:03:05,500 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2020-07-21 20:03:05,501 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:03:05,516 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:03:05,520 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:03:05,521 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2020-07-21 20:03:05,522 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 20:03:05,528 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:03:05,529 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 20:03:05,529 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:43, output treesize:7 [2020-07-21 20:03:05,548 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 20:03:05,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:03:05,848 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2020-07-21 20:03:05,851 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 20:03:05,855 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 20:03:05,856 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 20:03:05,858 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:03:05,858 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:03:05,863 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:03:05,867 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2020-07-21 20:03:05,872 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 20:03:05,882 INFO L624 ElimStorePlain]: treesize reduction 17, result has 15.0 percent of original size [2020-07-21 20:03:05,883 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:03:05,887 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:03:05,888 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-21 20:03:05,888 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:39, output treesize:7 [2020-07-21 20:03:05,898 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 20:03:05,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749202574] [2020-07-21 20:03:05,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:03:05,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-07-21 20:03:05,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582872638] [2020-07-21 20:03:05,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 20:03:05,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:03:05,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 20:03:05,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-07-21 20:03:05,901 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 15 states. [2020-07-21 20:03:06,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:03:06,257 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2020-07-21 20:03:06,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 20:03:06,257 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-07-21 20:03:06,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:03:06,259 INFO L225 Difference]: With dead ends: 75 [2020-07-21 20:03:06,259 INFO L226 Difference]: Without dead ends: 59 [2020-07-21 20:03:06,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-07-21 20:03:06,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-21 20:03:06,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-07-21 20:03:06,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-21 20:03:06,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2020-07-21 20:03:06,268 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 27 [2020-07-21 20:03:06,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:03:06,268 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2020-07-21 20:03:06,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 20:03:06,268 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2020-07-21 20:03:06,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 20:03:06,269 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:03:06,270 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, 1] [2020-07-21 20:03:06,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:03:06,484 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:03:06,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:03:06,485 INFO L82 PathProgramCache]: Analyzing trace with hash 109910721, now seen corresponding path program 1 times [2020-07-21 20:03:06,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:03:06,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125214916] [2020-07-21 20:03:06,486 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:03:06,597 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:03:06,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:03:06,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 20:03:06,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:03:06,633 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 20:03:06,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:03:06,718 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 20:03:06,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125214916] [2020-07-21 20:03:06,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:03:06,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-21 20:03:06,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936544292] [2020-07-21 20:03:06,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 20:03:06,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:03:06,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 20:03:06,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 20:03:06,720 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand 9 states. [2020-07-21 20:03:06,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:03:06,770 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2020-07-21 20:03:06,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 20:03:06,771 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-21 20:03:06,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:03:06,772 INFO L225 Difference]: With dead ends: 62 [2020-07-21 20:03:06,772 INFO L226 Difference]: Without dead ends: 49 [2020-07-21 20:03:06,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 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 20:03:06,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-21 20:03:06,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-07-21 20:03:06,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 20:03:06,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-07-21 20:03:06,778 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 28 [2020-07-21 20:03:06,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:03:06,779 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-07-21 20:03:06,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 20:03:06,779 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-07-21 20:03:06,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 20:03:06,780 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:03:06,780 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 20:03:06,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:03:06,994 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:03:06,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:03:06,995 INFO L82 PathProgramCache]: Analyzing trace with hash 260011544, now seen corresponding path program 1 times [2020-07-21 20:03:06,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:03:06,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906703532] [2020-07-21 20:03:06,997 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:03:07,355 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:03:07,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:03:07,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:03:07,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:03:07,397 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 20:03:07,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:03:07,501 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 20:03:07,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906703532] [2020-07-21 20:03:07,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:03:07,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-07-21 20:03:07,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927860] [2020-07-21 20:03:07,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 20:03:07,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:03:07,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 20:03:07,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-21 20:03:07,504 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 11 states. [2020-07-21 20:03:07,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:03:07,578 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2020-07-21 20:03:07,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 20:03:07,578 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-07-21 20:03:07,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:03:07,580 INFO L225 Difference]: With dead ends: 76 [2020-07-21 20:03:07,580 INFO L226 Difference]: Without dead ends: 56 [2020-07-21 20:03:07,581 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 20:03:07,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-21 20:03:07,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-07-21 20:03:07,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 20:03:07,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-07-21 20:03:07,592 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 34 [2020-07-21 20:03:07,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:03:07,594 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-07-21 20:03:07,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 20:03:07,594 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-07-21 20:03:07,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 20:03:07,598 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:03:07,598 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 20:03:07,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:03:07,813 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:03:07,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:03:07,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1408992297, now seen corresponding path program 2 times [2020-07-21 20:03:07,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:03:07,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53315755] [2020-07-21 20:03:07,815 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:03:11,794 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:03:11,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:03:11,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 20:03:11,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:03:11,857 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 20:03:11,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:03:11,999 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 20:03:12,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53315755] [2020-07-21 20:03:12,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:03:12,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-21 20:03:12,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823739291] [2020-07-21 20:03:12,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 20:03:12,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:03:12,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 20:03:12,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-07-21 20:03:12,002 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 13 states. [2020-07-21 20:03:12,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:03:12,095 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2020-07-21 20:03:12,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 20:03:12,095 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-07-21 20:03:12,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:03:12,097 INFO L225 Difference]: With dead ends: 83 [2020-07-21 20:03:12,097 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 20:03:12,098 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 20:03:12,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 20:03:12,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-21 20:03:12,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 20:03:12,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-07-21 20:03:12,113 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 41 [2020-07-21 20:03:12,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:03:12,114 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-07-21 20:03:12,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 20:03:12,114 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-07-21 20:03:12,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-21 20:03:12,117 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:03:12,117 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 20:03:12,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:03:12,332 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:03:12,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:03:12,332 INFO L82 PathProgramCache]: Analyzing trace with hash -2107133704, now seen corresponding path program 3 times [2020-07-21 20:03:12,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:03:12,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520634411] [2020-07-21 20:03:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:03:24,344 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:03:24,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:03:24,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 20:03:24,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:03:24,415 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 20:03:24,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:03:24,581 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 20:03:24,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520634411] [2020-07-21 20:03:24,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:03:24,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 20:03:24,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067667199] [2020-07-21 20:03:24,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 20:03:24,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:03:24,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 20:03:24,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-07-21 20:03:24,584 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 14 states. [2020-07-21 20:03:24,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:03:24,672 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2020-07-21 20:03:24,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 20:03:24,672 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-07-21 20:03:24,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:03:24,673 INFO L225 Difference]: With dead ends: 90 [2020-07-21 20:03:24,674 INFO L226 Difference]: Without dead ends: 70 [2020-07-21 20:03:24,674 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 20:03:24,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-21 20:03:24,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-07-21 20:03:24,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 20:03:24,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-07-21 20:03:24,682 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 48 [2020-07-21 20:03:24,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:03:24,683 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-07-21 20:03:24,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 20:03:24,683 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-07-21 20:03:24,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 20:03:24,685 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:03:24,685 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 20:03:24,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:03:24,886 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:03:24,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:03:24,887 INFO L82 PathProgramCache]: Analyzing trace with hash 893734217, now seen corresponding path program 4 times [2020-07-21 20:03:24,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:03:24,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94513744] [2020-07-21 20:03:24,889 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:04:05,002 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:04:05,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:04:05,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-21 20:04:05,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:04:05,055 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 20:04:05,056 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:04:05,060 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:04:05,060 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:04:05,061 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-21 20:04:05,086 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:04:05,087 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 20:04:05,088 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:04:05,093 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:04:05,094 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:04:05,094 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:11 [2020-07-21 20:04:05,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:04:05,114 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2020-07-21 20:04:05,115 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:04:05,124 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:04:05,124 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:04:05,125 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:27 [2020-07-21 20:04:05,153 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_92|], 10=[|v_#memory_int_94|]} [2020-07-21 20:04:05,168 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 20:04:05,183 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:04:05,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:04:05,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:04:05,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:04:05,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:04:05,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:04:05,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:04:05,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:04:05,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:04:05,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:04:05,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:04:05,197 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2020-07-21 20:04:05,198 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 20:04:05,219 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:04:05,221 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 20:04:05,221 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:27 [2020-07-21 20:04:05,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:04:05,236 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2020-07-21 20:04:05,237 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:04:05,248 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:04:05,249 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:04:05,249 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:20 [2020-07-21 20:04:05,324 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 20:04:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 20:04:05,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:04:05,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:04:05,547 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-07-21 20:04:05,871 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 20:04:05,874 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:04:05,874 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 20:04:05,875 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:17 [2020-07-21 20:04:05,926 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_92|], 3=[|v_#memory_int_121|]} [2020-07-21 20:04:05,929 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 20:04:05,944 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:04:05,946 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 20:04:05,952 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:04:05,953 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-21 20:04:05,953 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:57 [2020-07-21 20:04:06,039 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:04:06,056 INFO L624 ElimStorePlain]: treesize reduction 9, result has 60.9 percent of original size [2020-07-21 20:04:06,056 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:04:06,057 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:11 [2020-07-21 20:04:06,153 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 20:04:06,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94513744] [2020-07-21 20:04:06,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:04:06,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2020-07-21 20:04:06,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123966845] [2020-07-21 20:04:06,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 20:04:06,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:04:06,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 20:04:06,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-07-21 20:04:06,156 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 22 states. [2020-07-21 20:04:06,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:04:06,921 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2020-07-21 20:04:06,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 20:04:06,921 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 55 [2020-07-21 20:04:06,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:04:06,923 INFO L225 Difference]: With dead ends: 83 [2020-07-21 20:04:06,924 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 20:04:06,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2020-07-21 20:04:06,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 20:04:06,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2020-07-21 20:04:06,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 20:04:06,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2020-07-21 20:04:06,931 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 55 [2020-07-21 20:04:06,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:04:06,932 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2020-07-21 20:04:06,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 20:04:06,932 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2020-07-21 20:04:06,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 20:04:06,933 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:04:06,934 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 20:04:07,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:04:07,149 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:04:07,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:04:07,149 INFO L82 PathProgramCache]: Analyzing trace with hash 895583181, now seen corresponding path program 1 times [2020-07-21 20:04:07,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:04:07,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676021372] [2020-07-21 20:04:07,151 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:05:23,302 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:05:23,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 20:05:23,303 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:06:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 20:06:11,567 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:06:11,804 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 20:06:11,804 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 20:06:12,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:06:12,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:06:12 BoogieIcfgContainer [2020-07-21 20:06:12,061 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:06:12,063 INFO L168 Benchmark]: Toolchain (without parser) took 190065.38 ms. Allocated memory was 146.3 MB in the beginning and 296.7 MB in the end (delta: 150.5 MB). Free memory was 103.0 MB in the beginning and 134.3 MB in the end (delta: -31.3 MB). Peak memory consumption was 119.1 MB. Max. memory is 7.1 GB. [2020-07-21 20:06:12,063 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 20:06:12,065 INFO L168 Benchmark]: CACSL2BoogieTranslator took 666.63 ms. Allocated memory was 146.3 MB in the beginning and 204.5 MB in the end (delta: 58.2 MB). Free memory was 102.6 MB in the beginning and 171.1 MB in the end (delta: -68.5 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. [2020-07-21 20:06:12,066 INFO L168 Benchmark]: Boogie Preprocessor took 92.88 ms. Allocated memory is still 204.5 MB. Free memory was 171.1 MB in the beginning and 167.8 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-07-21 20:06:12,067 INFO L168 Benchmark]: RCFGBuilder took 634.55 ms. Allocated memory is still 204.5 MB. Free memory was 167.8 MB in the beginning and 121.8 MB in the end (delta: 46.0 MB). Peak memory consumption was 46.0 MB. Max. memory is 7.1 GB. [2020-07-21 20:06:12,067 INFO L168 Benchmark]: TraceAbstraction took 188664.81 ms. Allocated memory was 204.5 MB in the beginning and 296.7 MB in the end (delta: 92.3 MB). Free memory was 121.2 MB in the beginning and 134.3 MB in the end (delta: -13.2 MB). Peak memory consumption was 79.1 MB. Max. memory is 7.1 GB. [2020-07-21 20:06:12,073 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 666.63 ms. Allocated memory was 146.3 MB in the beginning and 204.5 MB in the end (delta: 58.2 MB). Free memory was 102.6 MB in the beginning and 171.1 MB in the end (delta: -68.5 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 92.88 ms. Allocated memory is still 204.5 MB. Free memory was 171.1 MB in the beginning and 167.8 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 634.55 ms. Allocated memory is still 204.5 MB. Free memory was 167.8 MB in the beginning and 121.8 MB in the end (delta: 46.0 MB). Peak memory consumption was 46.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 188664.81 ms. Allocated memory was 204.5 MB in the beginning and 296.7 MB in the end (delta: 92.3 MB). Free memory was 121.2 MB in the beginning and 134.3 MB in the end (delta: -13.2 MB). Peak memory consumption was 79.1 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))={11780:0}, new_head={11780:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={11780:0}, new_head={11780:0}] [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))={11780:0}, new_head={11780:0}] [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))={11780:0}, new_head={11780:0}] [L579] COND FALSE !(\read(head)) VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={11780:0}, new_head={11780:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={11780:0}, len=4, malloc(sizeof(struct node))={11780:0}, new_head={11780:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={11780:0}, len=4, malloc(sizeof(struct node))={11779:0}, new_head={11779:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={11780:0}, len=4, malloc(sizeof(struct node))={11779:0}, new_head={11779:0}] [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={11780:0}, len=4, malloc(sizeof(struct node))={11779:0}, new_head={11779:0}] [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={11780:0}, len=4, malloc(sizeof(struct node))={11779:0}, new_head={11779:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={11780:0}, len=4, malloc(sizeof(struct node))={11779:0}, new_head={11779:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={11779:0}, len=3, malloc(sizeof(struct node))={11779:0}, new_head={11779:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={11779:0}, len=3, malloc(sizeof(struct node))={11777:0}, new_head={11777:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={11779:0}, len=3, malloc(sizeof(struct node))={11777:0}, new_head={11777:0}] [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={11779:0}, len=3, malloc(sizeof(struct node))={11777:0}, new_head={11777:0}] [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={11779:0}, len=3, malloc(sizeof(struct node))={11777:0}, new_head={11777:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={11779:0}, len=3, malloc(sizeof(struct node))={11777:0}, new_head={11777:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={11777:0}, len=2, malloc(sizeof(struct node))={11777:0}, new_head={11777:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={11777:0}, len=2, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={11777:0}, len=2, 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()=2, __VERIFIER_nondet_int() == len? 1 : 0=1, head={11777:0}, len=2, 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={11777:0}, len=2, 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={11777:0}, len=2, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-1:0}, len=1, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-1:0}, len=1, malloc(sizeof(struct node))={11778:0}, new_head={11778:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-1:0}, len=1, malloc(sizeof(struct node))={11778:0}, new_head={11778:0}] [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={-1:0}, len=1, malloc(sizeof(struct node))={11778:0}, new_head={11778:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-1:0}, len=1, malloc(sizeof(struct node))={11778:0}, new_head={11778:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={-1:0}, len=1, malloc(sizeof(struct node))={11778:0}, new_head={11778:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={11778:0}, len=0, malloc(sizeof(struct node))={11778:0}, new_head={11778:0}] [L569] COND FALSE !(len > 0) VAL [\old(len)=5, head={11778:0}, len=0, malloc(sizeof(struct node))={11778:0}, new_head={11778:0}] [L585] return head; VAL [\old(len)=5, \result={11778:0}, head={11778:0}, len=0, malloc(sizeof(struct node))={11778:0}, new_head={11778:0}] [L589] RET, EXPR dll_create(len) VAL [dll_create(len)={11778:0}, len=5] [L589] DLL head = dll_create(len); [L590] head->next VAL [head={11778:0}, head->next={-1:0}, 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={11778:0}, 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={11778:0}, 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={11778:0}, len=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 188.5s, OverallIterations: 10, TraceHistogramMax: 5, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 320 SDtfs, 488 SDslu, 1246 SDs, 0 SdLazy, 637 SolverSat, 60 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 544 GetRequests, 439 SyntacticMatches, 10 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=9, 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, 9 MinimizatonAttempts, 53 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 132.3s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 355 NumberOfCodeBlocks, 329 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 518 ConstructedInterpolants, 3 QuantifiedInterpolants, 91074 SizeOfPredicates, 53 NumberOfNonLiveVariables, 1326 ConjunctsInSsa, 128 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 137/313 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...