/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 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:57:53,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:57:53,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:57:53,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:57:53,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:57:53,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:57:53,606 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:57:53,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:57:53,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:57:53,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:57:53,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:57:53,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:57:53,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:57:53,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:57:53,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:57:53,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:57:53,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:57:53,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:57:53,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:57:53,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:57:53,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:57:53,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:57:53,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:57:53,661 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:57:53,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 21:57:53,664 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 21:57:53,664 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 21:57:53,667 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 21:57:53,667 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 21:57:53,669 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 21:57:53,669 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 21:57:53,671 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 21:57:53,671 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 21:57:53,672 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 21:57:53,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 21:57:53,673 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 21:57:53,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 21:57:53,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 21:57:53,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:57:53,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:57:53,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:57:53,678 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 21:57:53,716 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:57:53,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:57:53,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:57:53,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:57:53,720 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:57:53,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:57:53,724 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:57:53,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:57:53,724 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:57:53,724 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:57:53,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:57:53,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:57:53,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:57:53,725 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:57:53,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:57:53,725 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:57:53,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:57:53,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:57:53,726 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:57:53,726 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:57:53,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:57:53,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:57:53,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:57:53,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:57:53,727 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:57:53,727 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:57:53,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:53,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:57:53,728 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:57:53,728 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 -> 4 [2020-07-20 21:57:54,035 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:57:54,048 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:57:54,052 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:57:54,054 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:57:54,054 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:57:54,055 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-07-20 21:57:54,127 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3498b72a0/407a7577c47e41738de39da76b9ee7ac/FLAGf0ae66144 [2020-07-20 21:57:54,712 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:57:54,713 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-07-20 21:57:54,726 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3498b72a0/407a7577c47e41738de39da76b9ee7ac/FLAGf0ae66144 [2020-07-20 21:57:54,974 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3498b72a0/407a7577c47e41738de39da76b9ee7ac [2020-07-20 21:57:54,986 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:57:54,989 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:57:54,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:57:54,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:57:54,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:57:54,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:57:54" (1/1) ... [2020-07-20 21:57:55,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@658a318f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:57:54, skipping insertion in model container [2020-07-20 21:57:55,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:57:54" (1/1) ... [2020-07-20 21:57:55,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:57:55,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:57:55,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:57:55,583 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:57:55,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:57:55,692 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:57:55,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:57:55 WrapperNode [2020-07-20 21:57:55,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:57:55,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:57:55,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:57:55,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:57:55,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:57:55" (1/1) ... [2020-07-20 21:57:55,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:57:55" (1/1) ... [2020-07-20 21:57:55,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:57:55" (1/1) ... [2020-07-20 21:57:55,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:57:55" (1/1) ... [2020-07-20 21:57:55,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:57:55" (1/1) ... [2020-07-20 21:57:55,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:57:55" (1/1) ... [2020-07-20 21:57:55,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:57:55" (1/1) ... [2020-07-20 21:57:55,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:57:55,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:57:55,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:57:55,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:57:55,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:57:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:57:55,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:57:55,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:57:55,827 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 21:57:55,827 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 21:57:55,827 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-20 21:57:55,827 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-07-20 21:57:55,827 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-07-20 21:57:55,827 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-07-20 21:57:55,828 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:57:55,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:57:55,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:57:55,828 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 21:57:55,828 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 21:57:55,828 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 21:57:55,829 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 21:57:55,829 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 21:57:55,829 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 21:57:55,829 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 21:57:55,829 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 21:57:55,829 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 21:57:55,829 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 21:57:55,830 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 21:57:55,830 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 21:57:55,830 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 21:57:55,830 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 21:57:55,830 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 21:57:55,830 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 21:57:55,831 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 21:57:55,831 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 21:57:55,831 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 21:57:55,831 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 21:57:55,831 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 21:57:55,831 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 21:57:55,832 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 21:57:55,832 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 21:57:55,832 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 21:57:55,832 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 21:57:55,832 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 21:57:55,832 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 21:57:55,833 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 21:57:55,833 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 21:57:55,833 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 21:57:55,833 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 21:57:55,833 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 21:57:55,833 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 21:57:55,833 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 21:57:55,833 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 21:57:55,834 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 21:57:55,834 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 21:57:55,834 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 21:57:55,834 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 21:57:55,834 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 21:57:55,834 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 21:57:55,834 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 21:57:55,835 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 21:57:55,835 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 21:57:55,835 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 21:57:55,835 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 21:57:55,835 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 21:57:55,835 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 21:57:55,836 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 21:57:55,836 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 21:57:55,836 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 21:57:55,836 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 21:57:55,836 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 21:57:55,836 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 21:57:55,837 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 21:57:55,837 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 21:57:55,837 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 21:57:55,837 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 21:57:55,837 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 21:57:55,837 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 21:57:55,838 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 21:57:55,838 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 21:57:55,838 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 21:57:55,838 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 21:57:55,838 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 21:57:55,838 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 21:57:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 21:57:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 21:57:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 21:57:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 21:57:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 21:57:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 21:57:55,840 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 21:57:55,840 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 21:57:55,840 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 21:57:55,840 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 21:57:55,840 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 21:57:55,840 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 21:57:55,840 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 21:57:55,840 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 21:57:55,841 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 21:57:55,841 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 21:57:55,841 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 21:57:55,841 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 21:57:55,841 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 21:57:55,841 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 21:57:55,841 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 21:57:55,841 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 21:57:55,841 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 21:57:55,841 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 21:57:55,841 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 21:57:55,842 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 21:57:55,842 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 21:57:55,842 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 21:57:55,842 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 21:57:55,842 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 21:57:55,842 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 21:57:55,842 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 21:57:55,842 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 21:57:55,842 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 21:57:55,842 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 21:57:55,843 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 21:57:55,843 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 21:57:55,843 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 21:57:55,843 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-20 21:57:55,843 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-07-20 21:57:55,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 21:57:55,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 21:57:55,843 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-07-20 21:57:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 21:57:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-07-20 21:57:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 21:57:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:57:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:57:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:57:56,207 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-20 21:57:56,386 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:57:56,386 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-20 21:57:56,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:57:56 BoogieIcfgContainer [2020-07-20 21:57:56,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:57:56,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:57:56,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:57:56,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:57:56,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:57:54" (1/3) ... [2020-07-20 21:57:56,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d8eaff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:57:56, skipping insertion in model container [2020-07-20 21:57:56,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:57:55" (2/3) ... [2020-07-20 21:57:56,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d8eaff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:57:56, skipping insertion in model container [2020-07-20 21:57:56,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:57:56" (3/3) ... [2020-07-20 21:57:56,401 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-07-20 21:57:56,413 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:57:56,423 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:57:56,438 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:57:56,461 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:57:56,461 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:57:56,461 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:57:56,462 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:57:56,462 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:57:56,462 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:57:56,462 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:57:56,462 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:57:56,479 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-07-20 21:57:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 21:57:56,486 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:57:56,487 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] [2020-07-20 21:57:56,487 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:57:56,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:57:56,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1666427650, now seen corresponding path program 1 times [2020-07-20 21:57:56,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:57:56,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669680313] [2020-07-20 21:57:56,502 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:56,707 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:57:56,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:57:56,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 21:57:56,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:57:56,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:57:56,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:57:56,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669680313] [2020-07-20 21:57:56,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:57:56,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 21:57:56,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405427896] [2020-07-20 21:57:56,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 21:57:56,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:57:56,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 21:57:56,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 21:57:56,787 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2020-07-20 21:57:56,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:57:56,844 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2020-07-20 21:57:56,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 21:57:56,847 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2020-07-20 21:57:56,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:57:56,862 INFO L225 Difference]: With dead ends: 73 [2020-07-20 21:57:56,862 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 21:57:56,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 21:57:56,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 21:57:56,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 21:57:56,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 21:57:56,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-20 21:57:56,910 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-07-20 21:57:56,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:57:56,911 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-20 21:57:56,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 21:57:56,911 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-20 21:57:56,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 21:57:56,912 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:57:56,913 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] [2020-07-20 21:57:57,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:57,127 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:57:57,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:57:57,128 INFO L82 PathProgramCache]: Analyzing trace with hash -29727073, now seen corresponding path program 1 times [2020-07-20 21:57:57,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:57:57,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346275582] [2020-07-20 21:57:57,130 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:57,261 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:57:57,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:57:57,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:57:57,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:57:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:57:57,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:57:57,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346275582] [2020-07-20 21:57:57,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:57:57,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:57:57,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100182318] [2020-07-20 21:57:57,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:57:57,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:57:57,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:57:57,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:57:57,339 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-07-20 21:57:57,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:57:57,415 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-07-20 21:57:57,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:57:57,416 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-07-20 21:57:57,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:57:57,418 INFO L225 Difference]: With dead ends: 45 [2020-07-20 21:57:57,418 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 21:57:57,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:57:57,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 21:57:57,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-07-20 21:57:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 21:57:57,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-20 21:57:57,435 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2020-07-20 21:57:57,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:57:57,436 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-20 21:57:57,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:57:57,436 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-20 21:57:57,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 21:57:57,437 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:57:57,438 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] [2020-07-20 21:57:57,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:57,645 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:57:57,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:57:57,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1680455870, now seen corresponding path program 1 times [2020-07-20 21:57:57,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:57:57,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481888361] [2020-07-20 21:57:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:57,774 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:57:57,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:57:57,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 21:57:57,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:57:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:57:57,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:57:57,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481888361] [2020-07-20 21:57:57,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:57:57,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 21:57:57,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062334826] [2020-07-20 21:57:57,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 21:57:57,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:57:57,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 21:57:57,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 21:57:57,877 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2020-07-20 21:57:58,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:57:58,005 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-07-20 21:57:58,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:57:58,007 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-20 21:57:58,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:57:58,008 INFO L225 Difference]: With dead ends: 39 [2020-07-20 21:57:58,009 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 21:57:58,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:57:58,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 21:57:58,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 21:57:58,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 21:57:58,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-20 21:57:58,027 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 28 [2020-07-20 21:57:58,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:57:58,028 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-20 21:57:58,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 21:57:58,029 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-20 21:57:58,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 21:57:58,031 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:57:58,031 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, 1] [2020-07-20 21:57:58,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:58,238 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:57:58,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:57:58,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1808388506, now seen corresponding path program 1 times [2020-07-20 21:57:58,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:57:58,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914121223] [2020-07-20 21:57:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:58,361 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:57:58,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:57:58,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 21:57:58,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:57:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:57:58,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:57:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:57:58,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914121223] [2020-07-20 21:57:58,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:57:58,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-20 21:57:58,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401229190] [2020-07-20 21:57:58,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 21:57:58,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:57:58,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 21:57:58,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 21:57:58,514 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 9 states. [2020-07-20 21:57:58,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:57:58,567 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-07-20 21:57:58,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:57:58,567 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-20 21:57:58,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:57:58,568 INFO L225 Difference]: With dead ends: 50 [2020-07-20 21:57:58,569 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 21:57:58,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-07-20 21:57:58,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 21:57:58,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-07-20 21:57:58,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 21:57:58,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-20 21:57:58,576 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2020-07-20 21:57:58,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:57:58,576 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-20 21:57:58,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 21:57:58,577 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-20 21:57:58,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 21:57:58,578 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:57:58,578 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-07-20 21:57:58,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:58,792 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:57:58,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:57:58,793 INFO L82 PathProgramCache]: Analyzing trace with hash 560900285, now seen corresponding path program 2 times [2020-07-20 21:57:58,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:57:58,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783168486] [2020-07-20 21:57:58,794 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:58,892 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:57:58,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:57:58,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 21:57:58,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:57:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:57:58,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:57:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:57:59,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783168486] [2020-07-20 21:57:59,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:57:59,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 21:57:59,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698287300] [2020-07-20 21:57:59,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 21:57:59,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:57:59,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 21:57:59,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-07-20 21:57:59,116 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 10 states. [2020-07-20 21:57:59,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:57:59,191 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-07-20 21:57:59,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:57:59,191 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-07-20 21:57:59,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:57:59,192 INFO L225 Difference]: With dead ends: 53 [2020-07-20 21:57:59,192 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 21:57:59,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-07-20 21:57:59,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 21:57:59,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-07-20 21:57:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 21:57:59,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-07-20 21:57:59,199 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 32 [2020-07-20 21:57:59,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:57:59,200 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-07-20 21:57:59,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 21:57:59,200 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-07-20 21:57:59,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-20 21:57:59,201 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:57:59,201 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:57:59,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:59,411 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:57:59,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:57:59,411 INFO L82 PathProgramCache]: Analyzing trace with hash 991320762, now seen corresponding path program 3 times [2020-07-20 21:57:59,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:57:59,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933132989] [2020-07-20 21:57:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:59,525 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:57:59,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:57:59,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 44 conjunts are in the unsatisfiable core [2020-07-20 21:57:59,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:57:59,624 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 11 treesize of output 7 [2020-07-20 21:57:59,624 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:57:59,631 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:57:59,633 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:57:59,633 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2020-07-20 21:57:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:57:59,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:58:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:58:00,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933132989] [2020-07-20 21:58:00,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:58:00,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2020-07-20 21:58:00,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203389392] [2020-07-20 21:58:00,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:58:00,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:58:00,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:58:00,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:58:00,191 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 21 states. [2020-07-20 21:58:02,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:58:02,540 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-07-20 21:58:02,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:58:02,541 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-07-20 21:58:02,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:58:02,543 INFO L225 Difference]: With dead ends: 44 [2020-07-20 21:58:02,543 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 21:58:02,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:58:02,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 21:58:02,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-20 21:58:02,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 21:58:02,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-07-20 21:58:02,551 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 35 [2020-07-20 21:58:02,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:58:02,551 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-07-20 21:58:02,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:58:02,552 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-07-20 21:58:02,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 21:58:02,553 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:58:02,553 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-07-20 21:58:02,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:58:02,755 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:58:02,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:58:02,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1265881822, now seen corresponding path program 4 times [2020-07-20 21:58:02,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:58:02,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387964135] [2020-07-20 21:58:02,757 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:58:02,891 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:58:02,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:58:02,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 55 conjunts are in the unsatisfiable core [2020-07-20 21:58:02,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:58:02,935 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 11 treesize of output 7 [2020-07-20 21:58:02,936 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:58:02,943 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:58:02,944 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:58:02,944 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2020-07-20 21:58:02,983 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.offset_29|], 2=[|v_#memory_$Pointer$.base_35|]} [2020-07-20 21:58:02,991 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2020-07-20 21:58:02,991 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:58:03,009 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:58:03,029 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:58:03,030 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 35 [2020-07-20 21:58:03,032 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:58:03,036 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:58:03,063 INFO L624 ElimStorePlain]: treesize reduction 16, result has 65.2 percent of original size [2020-07-20 21:58:03,065 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:58:03,065 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:31 [2020-07-20 21:58:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:58:03,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:58:04,771 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_sll_create_~head~0.base_36 Int)) (not (= 0 (select (select (store |c_#memory_$Pointer$.base| v_sll_create_~head~0.base_36 (store (select |c_#memory_$Pointer$.base| v_sll_create_~head~0.base_36) c_sll_create_~new_head~0.offset c_sll_create_~head~0.base)) c_sll_create_~head~0.base) c_sll_create_~head~0.offset)))) is different from false [2020-07-20 21:58:05,765 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_sll_create_~head~0.base_36 Int)) (not (= 0 (select (select (store |c_#memory_$Pointer$.base| v_sll_create_~head~0.base_36 (store (select |c_#memory_$Pointer$.base| v_sll_create_~head~0.base_36) 0 c_sll_create_~head~0.base)) c_sll_create_~head~0.base) c_sll_create_~head~0.offset)))) is different from false [2020-07-20 21:58:05,778 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 21:58:05,794 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:58:05,795 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-20 21:58:05,796 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:14 [2020-07-20 21:58:05,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:58:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2020-07-20 21:58:05,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387964135] [2020-07-20 21:58:05,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:58:05,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2020-07-20 21:58:05,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127440479] [2020-07-20 21:58:05,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 21:58:05,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:58:05,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 21:58:05,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=526, Unknown=2, NotChecked=94, Total=702 [2020-07-20 21:58:05,850 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 27 states. [2020-07-20 21:58:06,941 WARN L838 $PredicateComparison]: unable to prove that (and (not (= 0 (select (select |c_#memory_$Pointer$.base| c_sll_create_~head~0.base) c_sll_create_~head~0.offset))) (not (= 0 c_sll_create_~new_head~0.base)) (= 0 c_sll_create_~head~0.offset) (not (= 0 c_sll_create_~head~0.base)) (forall ((v_sll_create_~head~0.base_36 Int)) (not (= 0 (select (select (store |c_#memory_$Pointer$.base| v_sll_create_~head~0.base_36 (store (select |c_#memory_$Pointer$.base| v_sll_create_~head~0.base_36) 0 c_sll_create_~head~0.base)) c_sll_create_~head~0.base) c_sll_create_~head~0.offset)))) (= c_sll_create_~new_head~0.offset 0)) is different from false [2020-07-20 21:58:07,887 WARN L838 $PredicateComparison]: unable to prove that (and (not (= 0 (select (select |c_#memory_$Pointer$.base| c_sll_create_~head~0.base) c_sll_create_~head~0.offset))) (not (= 0 c_sll_create_~new_head~0.base)) (forall ((v_sll_create_~head~0.base_36 Int)) (not (= 0 (select (select (store |c_#memory_$Pointer$.base| v_sll_create_~head~0.base_36 (store (select |c_#memory_$Pointer$.base| v_sll_create_~head~0.base_36) c_sll_create_~new_head~0.offset c_sll_create_~head~0.base)) c_sll_create_~head~0.base) c_sll_create_~head~0.offset)))) (= 0 c_sll_create_~head~0.offset) (not (= 0 c_sll_create_~head~0.base)) (= c_sll_create_~new_head~0.offset 0)) is different from false [2020-07-20 21:58:09,897 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_sll_create_~head~0.base) c_sll_create_~head~0.offset))) (and (not (= 0 .cse0)) (= 0 (select (select |c_#memory_$Pointer$.offset| c_sll_create_~head~0.base) c_sll_create_~head~0.offset)) (= 0 c_sll_create_~head~0.offset) (not (= 0 c_sll_create_~head~0.base)) (not (= 0 (select (select |c_#memory_$Pointer$.base| .cse0) 0))) (forall ((v_sll_create_~head~0.base_36 Int)) (not (= 0 (select (select (store |c_#memory_$Pointer$.base| v_sll_create_~head~0.base_36 (store (select |c_#memory_$Pointer$.base| v_sll_create_~head~0.base_36) 0 c_sll_create_~head~0.base)) c_sll_create_~head~0.base) c_sll_create_~head~0.offset)))))) is different from false [2020-07-20 21:58:10,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:58:10,149 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-07-20 21:58:10,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 21:58:10,150 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 36 [2020-07-20 21:58:10,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:58:10,151 INFO L225 Difference]: With dead ends: 45 [2020-07-20 21:58:10,151 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 21:58:10,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=108, Invalid=663, Unknown=5, NotChecked=280, Total=1056 [2020-07-20 21:58:10,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 21:58:10,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-07-20 21:58:10,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 21:58:10,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-07-20 21:58:10,159 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 36 [2020-07-20 21:58:10,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:58:10,160 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-07-20 21:58:10,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 21:58:10,160 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-07-20 21:58:10,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 21:58:10,161 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:58:10,161 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:58:10,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:58:10,368 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:58:10,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:58:10,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1775282106, now seen corresponding path program 5 times [2020-07-20 21:58:10,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:58:10,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514027736] [2020-07-20 21:58:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:58:10,503 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:58:10,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 21:58:10,504 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:58:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 21:58:10,527 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:58:10,562 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 21:58:10,562 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 21:58:10,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:58:10,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:58:10 BoogieIcfgContainer [2020-07-20 21:58:10,840 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:58:10,845 INFO L168 Benchmark]: Toolchain (without parser) took 15857.59 ms. Allocated memory was 139.5 MB in the beginning and 284.2 MB in the end (delta: 144.7 MB). Free memory was 103.3 MB in the beginning and 202.9 MB in the end (delta: -99.5 MB). Peak memory consumption was 45.2 MB. Max. memory is 7.1 GB. [2020-07-20 21:58:10,848 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory is still 122.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 21:58:10,849 INFO L168 Benchmark]: CACSL2BoogieTranslator took 703.16 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 103.3 MB in the beginning and 170.9 MB in the end (delta: -67.5 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. [2020-07-20 21:58:10,849 INFO L168 Benchmark]: Boogie Preprocessor took 61.76 ms. Allocated memory is still 203.9 MB. Free memory was 170.9 MB in the beginning and 168.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-07-20 21:58:10,850 INFO L168 Benchmark]: RCFGBuilder took 635.43 ms. Allocated memory is still 203.9 MB. Free memory was 168.0 MB in the beginning and 124.6 MB in the end (delta: 43.4 MB). Peak memory consumption was 43.4 MB. Max. memory is 7.1 GB. [2020-07-20 21:58:10,851 INFO L168 Benchmark]: TraceAbstraction took 14446.98 ms. Allocated memory was 203.9 MB in the beginning and 284.2 MB in the end (delta: 80.2 MB). Free memory was 123.7 MB in the beginning and 202.9 MB in the end (delta: -79.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 7.1 GB. [2020-07-20 21:58:10,858 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory is still 122.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 703.16 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 103.3 MB in the beginning and 170.9 MB in the end (delta: -67.5 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.76 ms. Allocated memory is still 203.9 MB. Free memory was 170.9 MB in the beginning and 168.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 635.43 ms. Allocated memory is still 203.9 MB. Free memory was 168.0 MB in the beginning and 124.6 MB in the end (delta: 43.4 MB). Peak memory consumption was 43.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14446.98 ms. Allocated memory was 203.9 MB in the beginning and 284.2 MB in the end (delta: 80.2 MB). Free memory was 123.7 MB in the beginning and 202.9 MB in the end (delta: -79.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L592] int len = 2; VAL [len=2] [L593] len < 32 && __VERIFIER_nondet_int() [L593] len < 32 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, len=2, len < 32 && __VERIFIER_nondet_int()=0] [L593] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L596] CALL, EXPR sll_create(len + 1) VAL [\old(len)=3] [L564] SLL head = ((void *)0); VAL [\old(len)=3, head={0:0}, len=3] [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={0:0}, len=3, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={0:0}, len=3, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L570] new_head->next = head [L571] head = new_head [L572] len-- VAL [\old(len)=3, head={-1:0}, len=2, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={-1:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={-1:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L570] new_head->next = head [L571] head = new_head [L572] len-- VAL [\old(len)=3, head={-2:0}, len=1, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={-2:0}, len=1, malloc(sizeof(struct node))={24338:0}, new_head={24338:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={-2:0}, len=1, malloc(sizeof(struct node))={24338:0}, new_head={24338:0}] [L570] new_head->next = head [L571] head = new_head [L572] len-- VAL [\old(len)=3, head={24338:0}, len=0, malloc(sizeof(struct node))={24338:0}, new_head={24338:0}] [L565] COND FALSE !(len > 0) VAL [\old(len)=3, head={24338:0}, len=0, malloc(sizeof(struct node))={24338:0}, new_head={24338:0}] [L574] return head; VAL [\old(len)=3, \result={24338:0}, head={24338:0}, len=0, malloc(sizeof(struct node))={24338:0}, new_head={24338:0}] [L596] RET, EXPR sll_create(len + 1) VAL [len=2, sll_create(len + 1)={24338:0}] [L596] SLL s = sll_create(len + 1); [L597] CALL, EXPR sll_length(s) VAL [head={24338:0}] [L577] int len = 0; VAL [head={24338:0}, head={24338:0}, len=0] [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND FALSE !(\read(head)) VAL [head={24338:0}, head={0:0}, len=3] [L582] return len; VAL [\result=3, head={0:0}, head={24338:0}, len=3] [L597] RET, EXPR sll_length(s) VAL [len=2, s={24338:0}, sll_length(s)=3] [L597] COND TRUE len != sll_length(s) [L602] __VERIFIER_error() VAL [len=2, s={24338:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.3s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 7.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 197 SDtfs, 139 SDslu, 1050 SDs, 0 SdLazy, 516 SolverSat, 32 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 351 GetRequests, 260 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 7.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=0, 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, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 245 NumberOfCodeBlocks, 192 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 329 ConstructedInterpolants, 16 QuantifiedInterpolants, 54347 SizeOfPredicates, 43 NumberOfNonLiveVariables, 744 ConjunctsInSsa, 132 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 33/73 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...