/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --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/forester-heap/sll-rb-cnstr_1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:17:06,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:17:06,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:17:06,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:17:06,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:17:06,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:17:06,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:17:06,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:17:06,084 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:17:06,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:17:06,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:17:06,089 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:17:06,090 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:17:06,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:17:06,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:17:06,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:17:06,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:17:06,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:17:06,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:17:06,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:17:06,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:17:06,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:17:06,113 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:17:06,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:17:06,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 17:17:06,118 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 17:17:06,118 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 17:17:06,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 17:17:06,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 17:17:06,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 17:17:06,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 17:17:06,124 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 17:17:06,125 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 17:17:06,126 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 17:17:06,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 17:17:06,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 17:17:06,130 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 17:17:06,130 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 17:17:06,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:17:06,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:17:06,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:17:06,134 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 17:17:06,152 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:17:06,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:17:06,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:17:06,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:17:06,155 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:17:06,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:17:06,156 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:17:06,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:17:06,156 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:17:06,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:17:06,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:17:06,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:17:06,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:17:06,157 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:17:06,157 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:17:06,158 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:17:06,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:17:06,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:17:06,158 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:17:06,159 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:17:06,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:17:06,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:17:06,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:17:06,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:17:06,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:17:06,160 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:17:06,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:06,160 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:17:06,161 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:17:06,161 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 17:17:06,525 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:17:06,544 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:17:06,548 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:17:06,551 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:17:06,552 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:17:06,553 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1-2.i [2020-07-20 17:17:06,644 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56cda892b/eeb030c9d69144a19025f358092e4e6a/FLAGf504bb317 [2020-07-20 17:17:07,455 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:17:07,456 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1-2.i [2020-07-20 17:17:07,477 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56cda892b/eeb030c9d69144a19025f358092e4e6a/FLAGf504bb317 [2020-07-20 17:17:07,597 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56cda892b/eeb030c9d69144a19025f358092e4e6a [2020-07-20 17:17:07,609 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:17:07,614 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:17:07,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:17:07,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:17:07,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:17:07,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:17:07" (1/1) ... [2020-07-20 17:17:07,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@550e9810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:17:07, skipping insertion in model container [2020-07-20 17:17:07,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:17:07" (1/1) ... [2020-07-20 17:17:07,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:17:07,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:17:08,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:17:08,361 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:17:08,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:17:08,500 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:17:08,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:17:08 WrapperNode [2020-07-20 17:17:08,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:17:08,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:17:08,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:17:08,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:17:08,523 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:17:08" (1/1) ... [2020-07-20 17:17:08,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:17:08" (1/1) ... [2020-07-20 17:17:08,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:17:08" (1/1) ... [2020-07-20 17:17:08,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:17:08" (1/1) ... [2020-07-20 17:17:08,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:17:08" (1/1) ... [2020-07-20 17:17:08,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:17:08" (1/1) ... [2020-07-20 17:17:08,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:17:08" (1/1) ... [2020-07-20 17:17:08,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:17:08,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:17:08,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:17:08,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:17:08,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:17:08" (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 17:17:08,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:17:08,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:17:08,676 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:17:08,677 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 17:17:08,677 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 17:17:08,677 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 17:17:08,677 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 17:17:08,678 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 17:17:08,678 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 17:17:08,678 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 17:17:08,678 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 17:17:08,678 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 17:17:08,678 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 17:17:08,679 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 17:17:08,679 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 17:17:08,679 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 17:17:08,679 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 17:17:08,679 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 17:17:08,680 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 17:17:08,680 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 17:17:08,680 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 17:17:08,681 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 17:17:08,681 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 17:17:08,681 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 17:17:08,681 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 17:17:08,681 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 17:17:08,681 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 17:17:08,682 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 17:17:08,682 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 17:17:08,682 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 17:17:08,682 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 17:17:08,682 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 17:17:08,683 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 17:17:08,683 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 17:17:08,683 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 17:17:08,683 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 17:17:08,683 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 17:17:08,683 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 17:17:08,684 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 17:17:08,684 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 17:17:08,684 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 17:17:08,684 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 17:17:08,684 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 17:17:08,684 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 17:17:08,685 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 17:17:08,685 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 17:17:08,685 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 17:17:08,685 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 17:17:08,685 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 17:17:08,685 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 17:17:08,686 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 17:17:08,686 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 17:17:08,686 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 17:17:08,686 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 17:17:08,686 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 17:17:08,687 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 17:17:08,687 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 17:17:08,687 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 17:17:08,687 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 17:17:08,687 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 17:17:08,687 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 17:17:08,688 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 17:17:08,688 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:17:08,688 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 17:17:08,688 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 17:17:08,688 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 17:17:08,688 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 17:17:08,689 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 17:17:08,689 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 17:17:08,689 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 17:17:08,689 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 17:17:08,689 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 17:17:08,689 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 17:17:08,690 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 17:17:08,690 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 17:17:08,690 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 17:17:08,690 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 17:17:08,690 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 17:17:08,690 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 17:17:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 17:17:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 17:17:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 17:17:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 17:17:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 17:17:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 17:17:08,692 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 17:17:08,692 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 17:17:08,692 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 17:17:08,692 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 17:17:08,692 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 17:17:08,692 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 17:17:08,692 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 17:17:08,693 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 17:17:08,693 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 17:17:08,693 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 17:17:08,693 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 17:17:08,693 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 17:17:08,693 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 17:17:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 17:17:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 17:17:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 17:17:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 17:17:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 17:17:08,695 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 17:17:08,695 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 17:17:08,695 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 17:17:08,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:17:08,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:17:08,695 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:17:08,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 17:17:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 17:17:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 17:17:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 17:17:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 17:17:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:17:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:17:08,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:17:09,407 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:17:09,407 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-07-20 17:17:09,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:17:09 BoogieIcfgContainer [2020-07-20 17:17:09,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:17:09,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:17:09,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:17:09,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:17:09,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:17:07" (1/3) ... [2020-07-20 17:17:09,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d46227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:17:09, skipping insertion in model container [2020-07-20 17:17:09,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:17:08" (2/3) ... [2020-07-20 17:17:09,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d46227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:17:09, skipping insertion in model container [2020-07-20 17:17:09,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:17:09" (3/3) ... [2020-07-20 17:17:09,425 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-rb-cnstr_1-2.i [2020-07-20 17:17:09,442 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:17:09,454 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-07-20 17:17:09,475 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-07-20 17:17:09,512 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:17:09,512 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:17:09,512 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:17:09,513 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:17:09,513 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:17:09,513 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:17:09,513 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:17:09,513 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:17:09,541 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-07-20 17:17:09,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 17:17:09,551 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:09,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:09,553 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:09,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:09,563 INFO L82 PathProgramCache]: Analyzing trace with hash -810798801, now seen corresponding path program 1 times [2020-07-20 17:17:09,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:09,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744572718] [2020-07-20 17:17:09,578 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 17:17:09,790 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:09,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:09,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 17:17:09,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:09,922 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 17:17:09,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:09,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744572718] [2020-07-20 17:17:09,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:09,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:17:09,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047206190] [2020-07-20 17:17:09,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:17:09,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:09,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:17:09,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:17:09,968 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-07-20 17:17:10,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:10,202 INFO L93 Difference]: Finished difference Result 67 states and 107 transitions. [2020-07-20 17:17:10,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:17:10,206 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-07-20 17:17:10,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:10,223 INFO L225 Difference]: With dead ends: 67 [2020-07-20 17:17:10,223 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 17:17:10,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:17:10,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 17:17:10,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-07-20 17:17:10,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 17:17:10,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-07-20 17:17:10,292 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 10 [2020-07-20 17:17:10,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:10,293 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-07-20 17:17:10,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:17:10,294 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-07-20 17:17:10,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 17:17:10,295 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:10,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:10,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:10,512 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:10,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:10,513 INFO L82 PathProgramCache]: Analyzing trace with hash 59124385, now seen corresponding path program 1 times [2020-07-20 17:17:10,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:10,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501490284] [2020-07-20 17:17:10,514 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 17:17:10,638 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:10,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:10,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 17:17:10,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:10,726 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 13 treesize of output 9 [2020-07-20 17:17:10,727 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,733 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:10,734 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,735 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-20 17:17:10,778 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 7 [2020-07-20 17:17:10,780 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,783 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:10,784 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,785 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-20 17:17:10,798 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 17:17:10,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:10,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501490284] [2020-07-20 17:17:10,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:10,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:17:10,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758087152] [2020-07-20 17:17:10,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:17:10,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:10,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:17:10,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:17:10,804 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-07-20 17:17:10,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:10,972 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-07-20 17:17:10,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:17:10,973 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 17:17:10,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:10,975 INFO L225 Difference]: With dead ends: 51 [2020-07-20 17:17:10,975 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 17:17:10,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:17:10,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 17:17:10,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2020-07-20 17:17:10,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 17:17:10,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-07-20 17:17:10,988 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 14 [2020-07-20 17:17:10,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:10,988 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-07-20 17:17:10,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:17:10,988 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-07-20 17:17:10,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 17:17:10,990 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:10,990 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:11,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:11,205 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:11,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:11,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1951969173, now seen corresponding path program 1 times [2020-07-20 17:17:11,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:11,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764645492] [2020-07-20 17:17:11,207 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 17:17:11,456 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:11,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:11,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 17:17:11,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:11,486 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 [2020-07-20 17:17:11,487 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:11,499 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:11,516 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 13 treesize of output 9 [2020-07-20 17:17:11,517 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:11,535 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:11,536 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:11,537 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2020-07-20 17:17:11,634 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:11,635 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-07-20 17:17:11,638 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:11,721 INFO L624 ElimStorePlain]: treesize reduction 14, result has 80.3 percent of original size [2020-07-20 17:17:11,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:11,743 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:17:11,745 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:11,767 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:11,778 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 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:17:11,779 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:11,797 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:11,799 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:11,799 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:24 [2020-07-20 17:17:11,907 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:11,909 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2020-07-20 17:17:11,911 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:11,952 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:11,955 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_26|, |v_#memory_int_27|], 4=[|v_#memory_int_29|]} [2020-07-20 17:17:11,965 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:12,006 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:12,011 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:12,055 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:12,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:12,093 INFO L350 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2020-07-20 17:17:12,094 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 45 [2020-07-20 17:17:12,096 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:12,117 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:12,123 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:12,124 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:77, output treesize:40 [2020-07-20 17:17:12,279 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2020-07-20 17:17:12,281 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:12,288 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:12,290 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:12,291 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:49, output treesize:3 [2020-07-20 17:17:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:12,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:17:12,362 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_27|], 3=[|v_#memory_int_26|]} [2020-07-20 17:17:12,367 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:12,398 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:12,402 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:12,417 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:12,419 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. [2020-07-20 17:17:12,420 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:55 [2020-07-20 17:17:12,488 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_25|], 6=[|v_#memory_int_31|]} [2020-07-20 17:17:12,494 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:12,534 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:12,539 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:12,565 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:12,569 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-2 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:12,570 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:96, output treesize:102 [2020-07-20 17:17:14,760 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:14,761 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 22 treesize of output 26 [2020-07-20 17:17:14,763 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:14,768 INFO L624 ElimStorePlain]: treesize reduction 119, result has 0.8 percent of original size [2020-07-20 17:17:14,772 INFO L512 ElimStorePlain]: Eliminatee |v_#memory_int_24| vanished before elimination [2020-07-20 17:17:14,773 INFO L544 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:14,773 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 13 variables, input treesize:132, output treesize:1 [2020-07-20 17:17:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:14,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764645492] [2020-07-20 17:17:14,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:17:14,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-07-20 17:17:14,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013698486] [2020-07-20 17:17:14,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 17:17:14,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:14,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 17:17:14,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=83, Unknown=1, NotChecked=0, Total=110 [2020-07-20 17:17:14,791 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 11 states. [2020-07-20 17:17:23,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:23,521 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-07-20 17:17:23,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 17:17:23,524 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-07-20 17:17:23,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:23,525 INFO L225 Difference]: With dead ends: 64 [2020-07-20 17:17:23,525 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 17:17:23,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=78, Invalid=193, Unknown=1, NotChecked=0, Total=272 [2020-07-20 17:17:23,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 17:17:23,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 23. [2020-07-20 17:17:23,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 17:17:23,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-07-20 17:17:23,538 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2020-07-20 17:17:23,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:23,538 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-07-20 17:17:23,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 17:17:23,539 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-07-20 17:17:23,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 17:17:23,539 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:23,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:23,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:23,752 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:23,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:23,753 INFO L82 PathProgramCache]: Analyzing trace with hash -506610811, now seen corresponding path program 1 times [2020-07-20 17:17:23,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:23,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157767224] [2020-07-20 17:17:23,754 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 17:17:23,843 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:23,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:23,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:17:23,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:23,873 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 7 [2020-07-20 17:17:23,875 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:23,877 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:23,877 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:23,878 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-20 17:17:23,886 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 17:17:23,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:23,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157767224] [2020-07-20 17:17:23,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:23,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:17:23,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231104937] [2020-07-20 17:17:23,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:17:23,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:23,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:17:23,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:17:23,889 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2020-07-20 17:17:23,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:23,973 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-07-20 17:17:23,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:17:23,974 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-20 17:17:23,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:23,975 INFO L225 Difference]: With dead ends: 39 [2020-07-20 17:17:23,975 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 17:17:23,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 1 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 17:17:23,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 17:17:23,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-07-20 17:17:23,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 17:17:23,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-07-20 17:17:23,981 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2020-07-20 17:17:23,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:23,981 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-07-20 17:17:23,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:17:23,981 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-07-20 17:17:23,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 17:17:23,982 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:23,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:24,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:24,194 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:24,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:24,195 INFO L82 PathProgramCache]: Analyzing trace with hash -506551229, now seen corresponding path program 1 times [2020-07-20 17:17:24,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:24,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335347171] [2020-07-20 17:17:24,196 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 17:17:24,279 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:17:24,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 17:17:24,280 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:17:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 17:17:24,292 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:17:24,309 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 17:17:24,310 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:17:24,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:24,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:17:24 BoogieIcfgContainer [2020-07-20 17:17:24,551 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:17:24,554 INFO L168 Benchmark]: Toolchain (without parser) took 16942.09 ms. Allocated memory was 137.4 MB in the beginning and 251.7 MB in the end (delta: 114.3 MB). Free memory was 101.4 MB in the beginning and 185.1 MB in the end (delta: -83.7 MB). Peak memory consumption was 30.6 MB. Max. memory is 7.1 GB. [2020-07-20 17:17:24,554 INFO L168 Benchmark]: CDTParser took 0.61 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 17:17:24,555 INFO L168 Benchmark]: CACSL2BoogieTranslator took 884.98 ms. Allocated memory was 137.4 MB in the beginning and 203.4 MB in the end (delta: 66.1 MB). Free memory was 100.9 MB in the beginning and 170.5 MB in the end (delta: -69.6 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. [2020-07-20 17:17:24,556 INFO L168 Benchmark]: Boogie Preprocessor took 85.93 ms. Allocated memory is still 203.4 MB. Free memory was 170.5 MB in the beginning and 167.7 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-07-20 17:17:24,557 INFO L168 Benchmark]: RCFGBuilder took 823.38 ms. Allocated memory is still 203.4 MB. Free memory was 167.7 MB in the beginning and 122.7 MB in the end (delta: 45.0 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. [2020-07-20 17:17:24,558 INFO L168 Benchmark]: TraceAbstraction took 15136.20 ms. Allocated memory was 203.4 MB in the beginning and 251.7 MB in the end (delta: 48.2 MB). Free memory was 122.0 MB in the beginning and 185.1 MB in the end (delta: -63.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 17:17:24,563 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.61 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 884.98 ms. Allocated memory was 137.4 MB in the beginning and 203.4 MB in the end (delta: 66.1 MB). Free memory was 100.9 MB in the beginning and 170.5 MB in the end (delta: -69.6 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 85.93 ms. Allocated memory is still 203.4 MB. Free memory was 170.5 MB in the beginning and 167.7 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 823.38 ms. Allocated memory is still 203.4 MB. Free memory was 167.7 MB in the beginning and 122.7 MB in the end (delta: 45.0 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15136.20 ms. Allocated memory was 203.4 MB in the beginning and 251.7 MB in the end (delta: 48.2 MB). Free memory was 122.0 MB in the beginning and 185.1 MB in the end (delta: -63.1 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1038]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L995] SLL* list = malloc(sizeof(SLL)); [L996] list->next = ((void*)0) [L997] list->colour = BLACK [L999] SLL* end = list; VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1002] COND FALSE !(__VERIFIER_nondet_int()) [L1023] end = ((void*)0) [L1024] end = list VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1027] COND FALSE !(!(((void*)0) != end)) VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1028] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1028] COND FALSE !(!(BLACK == end->colour)) [L1030] COND TRUE ((void*)0) != end [L1032] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1032] COND FALSE !(RED == end->colour) [L1038] EXPR end->next VAL [end={-1:0}, end->next={0:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1038] COND TRUE !(end->next) [L1038] __VERIFIER_error() VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 15.0s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 9.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 111 SDtfs, 148 SDslu, 275 SDs, 0 SdLazy, 211 SolverSat, 50 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 8.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred 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, 4 MinimizatonAttempts, 70 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 79 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 72 ConstructedInterpolants, 9 QuantifiedInterpolants, 12205 SizeOfPredicates, 22 NumberOfNonLiveVariables, 238 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 0/4 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...