/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:01:57,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:01:57,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:01:57,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:01:57,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:01:57,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:01:57,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:01:57,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:01:57,734 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:01:57,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:01:57,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:01:57,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:01:57,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:01:57,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:01:57,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:01:57,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:01:57,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:01:57,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:01:57,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:01:57,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:01:57,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:01:57,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:01:57,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:01:57,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:01:57,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 20:01:57,770 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 20:01:57,770 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 20:01:57,773 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 20:01:57,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 20:01:57,776 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 20:01:57,776 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 20:01:57,777 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 20:01:57,778 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 20:01:57,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 20:01:57,780 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 20:01:57,780 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 20:01:57,781 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 20:01:57,781 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 20:01:57,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:01:57,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:01:57,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:01:57,785 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 20:01:57,822 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:01:57,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:01:57,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:01:57,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:01:57,827 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:01:57,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:01:57,827 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:01:57,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:01:57,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:01:57,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:01:57,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:01:57,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:01:57,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:01:57,830 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:01:57,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:01:57,830 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:01:57,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:01:57,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:01:57,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:01:57,832 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:01:57,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:01:57,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:01:57,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:01:57,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:01:57,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:01:57,836 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:01:57,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:01:57,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:01:57,836 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:01:57,836 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 20:01:58,166 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:01:58,179 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:01:58,183 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:01:58,184 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:01:58,185 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:01:58,186 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-07-21 20:01:58,269 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02b079e97/77717886a02b4cae8353173cefde91fd/FLAG14117076a [2020-07-21 20:01:58,837 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:01:58,838 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-07-21 20:01:58,851 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02b079e97/77717886a02b4cae8353173cefde91fd/FLAG14117076a [2020-07-21 20:01:59,149 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02b079e97/77717886a02b4cae8353173cefde91fd [2020-07-21 20:01:59,160 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:01:59,164 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:01:59,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:01:59,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:01:59,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:01:59,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:01:59" (1/1) ... [2020-07-21 20:01:59,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fd8fd09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:01:59, skipping insertion in model container [2020-07-21 20:01:59,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:01:59" (1/1) ... [2020-07-21 20:01:59,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:01:59,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:01:59,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:01:59,719 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:01:59,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:01:59,833 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:01:59,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:01:59 WrapperNode [2020-07-21 20:01:59,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:01:59,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:01:59,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:01:59,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:01:59,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:01:59" (1/1) ... [2020-07-21 20:01:59,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:01:59" (1/1) ... [2020-07-21 20:01:59,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:01:59" (1/1) ... [2020-07-21 20:01:59,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:01:59" (1/1) ... [2020-07-21 20:01:59,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:01:59" (1/1) ... [2020-07-21 20:01:59,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:01:59" (1/1) ... [2020-07-21 20:01:59,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:01:59" (1/1) ... [2020-07-21 20:01:59,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:01:59,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:01:59,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:01:59,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:01:59,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:01:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:01:59,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:01:59,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:01:59,990 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:01:59,990 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 20:01:59,990 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 20:01:59,991 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 20:01:59,991 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 20:01:59,992 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 20:01:59,992 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 20:01:59,992 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 20:01:59,993 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 20:01:59,993 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 20:01:59,994 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 20:01:59,994 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 20:01:59,994 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 20:01:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 20:01:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 20:01:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 20:01:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 20:01:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 20:01:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 20:01:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 20:01:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 20:01:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 20:01:59,997 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 20:01:59,997 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 20:01:59,998 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 20:01:59,998 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 20:01:59,998 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 20:01:59,999 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 20:01:59,999 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 20:01:59,999 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 20:01:59,999 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 20:01:59,999 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 20:02:00,000 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 20:02:00,000 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 20:02:00,000 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 20:02:00,000 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 20:02:00,000 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 20:02:00,000 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 20:02:00,000 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 20:02:00,001 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 20:02:00,001 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 20:02:00,001 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 20:02:00,001 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 20:02:00,001 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 20:02:00,001 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 20:02:00,001 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 20:02:00,002 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 20:02:00,002 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 20:02:00,002 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 20:02:00,002 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 20:02:00,002 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 20:02:00,002 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 20:02:00,002 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 20:02:00,003 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 20:02:00,003 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 20:02:00,003 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 20:02:00,004 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 20:02:00,004 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 20:02:00,004 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 20:02:00,004 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 20:02:00,004 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 20:02:00,005 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 20:02:00,005 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 20:02:00,005 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 20:02:00,005 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 20:02:00,006 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 20:02:00,006 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 20:02:00,006 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 20:02:00,006 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 20:02:00,007 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 20:02:00,007 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 20:02:00,008 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 20:02:00,008 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 20:02:00,008 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 20:02:00,009 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 20:02:00,009 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 20:02:00,010 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 20:02:00,010 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 20:02:00,010 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 20:02:00,010 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 20:02:00,010 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 20:02:00,010 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 20:02:00,010 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 20:02:00,011 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 20:02:00,012 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 20:02:00,012 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 20:02:00,012 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 20:02:00,012 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 20:02:00,012 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 20:02:00,012 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 20:02:00,012 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 20:02:00,013 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 20:02:00,013 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 20:02:00,013 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 20:02:00,013 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 20:02:00,013 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 20:02:00,013 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 20:02:00,013 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 20:02:00,014 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 20:02:00,014 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 20:02:00,014 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 20:02:00,014 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 20:02:00,014 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 20:02:00,014 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 20:02:00,014 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:02:00,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:02:00,015 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:02:00,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 20:02:00,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 20:02:00,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 20:02:00,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 20:02:00,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 20:02:00,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 20:02:00,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:02:00,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:02:00,685 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:02:00,685 INFO L295 CfgBuilder]: Removed 17 assume(true) statements. [2020-07-21 20:02:00,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:02:00 BoogieIcfgContainer [2020-07-21 20:02:00,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:02:00,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:02:00,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:02:00,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:02:00,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:01:59" (1/3) ... [2020-07-21 20:02:00,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295d1a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:02:00, skipping insertion in model container [2020-07-21 20:02:00,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:01:59" (2/3) ... [2020-07-21 20:02:00,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295d1a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:02:00, skipping insertion in model container [2020-07-21 20:02:00,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:02:00" (3/3) ... [2020-07-21 20:02:00,705 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2020-07-21 20:02:00,717 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:02:00,729 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-07-21 20:02:00,746 INFO L251 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-07-21 20:02:00,773 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:02:00,773 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:02:00,773 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:02:00,773 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:02:00,773 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:02:00,774 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:02:00,774 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:02:00,774 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:02:00,794 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2020-07-21 20:02:00,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 20:02:00,800 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:02:00,801 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:02:00,802 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:02:00,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:02:00,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1255802584, now seen corresponding path program 1 times [2020-07-21 20:02:00,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:02:00,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235968106] [2020-07-21 20:02:00,818 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:02:01,011 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:02:01,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:02:01,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 20:02:01,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:02:01,102 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2020-07-21 20:02:01,106 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:01,115 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:01,116 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:02:01,117 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2020-07-21 20:02:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:02:01,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:02:01,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235968106] [2020-07-21 20:02:01,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:02:01,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 20:02:01,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819134230] [2020-07-21 20:02:01,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 20:02:01,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:02:01,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 20:02:01,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 20:02:01,161 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 4 states. [2020-07-21 20:02:01,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:02:01,394 INFO L93 Difference]: Finished difference Result 104 states and 170 transitions. [2020-07-21 20:02:01,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 20:02:01,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-07-21 20:02:01,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:02:01,407 INFO L225 Difference]: With dead ends: 104 [2020-07-21 20:02:01,407 INFO L226 Difference]: Without dead ends: 49 [2020-07-21 20:02:01,412 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 [2020-07-21 20:02:01,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-21 20:02:01,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-07-21 20:02:01,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 20:02:01,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-07-21 20:02:01,461 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 10 [2020-07-21 20:02:01,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:02:01,461 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-07-21 20:02:01,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 20:02:01,462 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-07-21 20:02:01,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 20:02:01,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:02:01,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:02:01,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:02:01,681 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:02:01,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:02:01,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1890143313, now seen corresponding path program 1 times [2020-07-21 20:02:01,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:02:01,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581263375] [2020-07-21 20:02:01,683 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:02:02,370 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:02:02,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:02:02,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 20:02:02,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:02:02,392 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 [2020-07-21 20:02:02,392 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:02,395 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:02,396 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:02:02,396 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-21 20:02:02,421 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 [2020-07-21 20:02:02,422 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:02,427 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:02,428 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:02:02,428 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-21 20:02:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:02:02,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:02:02,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581263375] [2020-07-21 20:02:02,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:02:02,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 20:02:02,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618996671] [2020-07-21 20:02:02,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 20:02:02,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:02:02,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 20:02:02,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 20:02:02,455 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 4 states. [2020-07-21 20:02:02,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:02:02,532 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-07-21 20:02:02,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 20:02:02,532 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-07-21 20:02:02,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:02:02,534 INFO L225 Difference]: With dead ends: 43 [2020-07-21 20:02:02,534 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 20:02:02,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:02:02,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 20:02:02,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-21 20:02:02,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 20:02:02,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-07-21 20:02:02,542 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 12 [2020-07-21 20:02:02,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:02:02,543 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-07-21 20:02:02,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 20:02:02,543 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-07-21 20:02:02,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 20:02:02,544 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:02:02,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:02:02,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:02:02,759 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:02:02,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:02:02,760 INFO L82 PathProgramCache]: Analyzing trace with hash 290038970, now seen corresponding path program 1 times [2020-07-21 20:02:02,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:02:02,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978746935] [2020-07-21 20:02:02,761 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:02:02,875 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:02:02,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:02:02,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 20:02:02,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:02:02,900 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 [2020-07-21 20:02:02,901 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:02,905 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:02,905 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:02:02,906 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-21 20:02:02,941 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 [2020-07-21 20:02:02,943 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:02,946 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:02,947 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:02:02,947 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-21 20:02:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:02:02,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:02:02,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978746935] [2020-07-21 20:02:02,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:02:02,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 20:02:02,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249389716] [2020-07-21 20:02:02,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:02:02,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:02:02,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:02:02,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:02:02,964 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2020-07-21 20:02:03,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:02:03,119 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-07-21 20:02:03,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 20:02:03,120 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 20:02:03,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:02:03,121 INFO L225 Difference]: With dead ends: 66 [2020-07-21 20:02:03,122 INFO L226 Difference]: Without dead ends: 64 [2020-07-21 20:02:03,122 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 [2020-07-21 20:02:03,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-21 20:02:03,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2020-07-21 20:02:03,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-21 20:02:03,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-07-21 20:02:03,132 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 14 [2020-07-21 20:02:03,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:02:03,132 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-07-21 20:02:03,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:02:03,133 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-07-21 20:02:03,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 20:02:03,134 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:02:03,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:02:03,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:02:03,351 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:02:03,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:02:03,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2060721718, now seen corresponding path program 1 times [2020-07-21 20:02:03,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:02:03,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031124495] [2020-07-21 20:02:03,354 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:02:03,481 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:02:03,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:02:03,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 20:02:03,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:02:03,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:02:03,655 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-07-21 20:02:03,657 INFO L350 Elim1Store]: treesize reduction 106, result has 48.5 percent of original size [2020-07-21 20:02:03,657 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 2 case distinctions, treesize of input 74 treesize of output 107 [2020-07-21 20:02:03,659 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:03,850 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-07-21 20:02:03,851 INFO L624 ElimStorePlain]: treesize reduction 36, result has 80.1 percent of original size [2020-07-21 20:02:03,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:02:04,035 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-07-21 20:02:04,036 INFO L350 Elim1Store]: treesize reduction 115, result has 44.2 percent of original size [2020-07-21 20:02:04,037 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 2 case distinctions, treesize of input 74 treesize of output 98 [2020-07-21 20:02:04,038 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:04,201 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-07-21 20:02:04,203 INFO L624 ElimStorePlain]: treesize reduction 36, result has 78.6 percent of original size [2020-07-21 20:02:04,208 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 20:02:04,211 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 20:02:04,213 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-07-21 20:02:04,224 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 20:02:04,227 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 20:02:04,234 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 20:02:04,238 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-07-21 20:02:04,243 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 20:02:04,245 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 20:02:04,247 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 20:02:04,250 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 20:02:04,252 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-07-21 20:02:04,256 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 20:02:04,258 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 20:02:04,259 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-07-21 20:02:04,263 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-07-21 20:02:04,267 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-07-21 20:02:04,268 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 20:02:04,270 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 20:02:04,274 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-07-21 20:02:04,275 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 20:02:04,278 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 20:02:04,281 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 20:02:04,284 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 20:02:04,289 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 20:02:04,291 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 20:02:04,293 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-07-21 20:02:04,296 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 20:02:04,298 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 20:02:04,300 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:02:04,300 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:149, output treesize:15 [2020-07-21 20:02:04,322 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 15 treesize of output 7 [2020-07-21 20:02:04,323 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:04,329 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:04,335 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 15 treesize of output 7 [2020-07-21 20:02:04,336 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:04,339 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:04,340 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:02:04,340 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:29, output treesize:7 [2020-07-21 20:02:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:02:04,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:02:04,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031124495] [2020-07-21 20:02:04,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:02:04,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 20:02:04,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987166853] [2020-07-21 20:02:04,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 20:02:04,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:02:04,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 20:02:04,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 20:02:04,353 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 4 states. [2020-07-21 20:02:04,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:02:04,436 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-07-21 20:02:04,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 20:02:04,440 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-07-21 20:02:04,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:02:04,441 INFO L225 Difference]: With dead ends: 48 [2020-07-21 20:02:04,441 INFO L226 Difference]: Without dead ends: 46 [2020-07-21 20:02:04,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:02:04,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-21 20:02:04,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-07-21 20:02:04,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 20:02:04,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-07-21 20:02:04,448 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 15 [2020-07-21 20:02:04,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:02:04,449 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-07-21 20:02:04,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 20:02:04,449 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-07-21 20:02:04,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 20:02:04,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:02:04,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:02:04,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:02:04,651 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:02:04,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:02:04,652 INFO L82 PathProgramCache]: Analyzing trace with hash 373775322, now seen corresponding path program 1 times [2020-07-21 20:02:04,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:02:04,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853665801] [2020-07-21 20:02:04,653 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:02:04,774 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:02:04,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:02:04,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 20:02:04,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:02:04,822 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-07-21 20:02:04,823 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2020-07-21 20:02:04,824 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:04,834 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:04,834 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:02:04,835 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:15 [2020-07-21 20:02:04,893 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:04,894 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 69 [2020-07-21 20:02:04,895 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:04,948 INFO L624 ElimStorePlain]: treesize reduction 28, result has 68.5 percent of original size [2020-07-21 20:02:04,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:02:04,953 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:04,966 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:04,969 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 20:02:04,969 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:59, output treesize:28 [2020-07-21 20:02:05,030 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:05,031 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2020-07-21 20:02:05,032 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:05,048 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:05,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:02:05,052 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:05,063 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:05,064 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:02:05,064 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:66, output treesize:4 [2020-07-21 20:02:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:02:05,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:02:05,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853665801] [2020-07-21 20:02:05,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:02:05,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 20:02:05,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376983064] [2020-07-21 20:02:05,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:02:05,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:02:05,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:02:05,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:02:05,073 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 5 states. [2020-07-21 20:02:05,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:02:05,260 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-07-21 20:02:05,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 20:02:05,261 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-21 20:02:05,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:02:05,262 INFO L225 Difference]: With dead ends: 46 [2020-07-21 20:02:05,262 INFO L226 Difference]: Without dead ends: 44 [2020-07-21 20:02:05,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:02:05,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-21 20:02:05,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-21 20:02:05,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 20:02:05,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-07-21 20:02:05,269 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 17 [2020-07-21 20:02:05,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:02:05,269 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-07-21 20:02:05,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:02:05,269 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-07-21 20:02:05,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 20:02:05,270 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:02:05,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:02:05,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:02:05,483 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:02:05,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:02:05,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1568846049, now seen corresponding path program 1 times [2020-07-21 20:02:05,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:02:05,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866754968] [2020-07-21 20:02:05,486 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:02:05,572 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:02:05,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:02:05,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 20:02:05,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:02:05,591 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 [2020-07-21 20:02:05,591 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:05,594 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:05,594 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:02:05,595 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-21 20:02:05,610 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 [2020-07-21 20:02:05,611 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:05,614 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:05,614 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:02:05,615 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-21 20:02:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:02:05,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:02:05,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866754968] [2020-07-21 20:02:05,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:02:05,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 20:02:05,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845543572] [2020-07-21 20:02:05,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:02:05,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:02:05,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:02:05,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:02:05,628 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 5 states. [2020-07-21 20:02:05,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:02:05,796 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2020-07-21 20:02:05,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 20:02:05,796 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-07-21 20:02:05,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:02:05,798 INFO L225 Difference]: With dead ends: 72 [2020-07-21 20:02:05,798 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 20:02:05,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 20:02:05,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 20:02:05,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2020-07-21 20:02:05,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 20:02:05,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-07-21 20:02:05,815 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 18 [2020-07-21 20:02:05,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:02:05,815 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-07-21 20:02:05,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:02:05,815 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-07-21 20:02:05,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 20:02:05,816 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:02:05,816 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:02:06,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:02:06,018 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:02:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:02:06,019 INFO L82 PathProgramCache]: Analyzing trace with hash 777661568, now seen corresponding path program 1 times [2020-07-21 20:02:06,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:02:06,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887725976] [2020-07-21 20:02:06,020 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:02:06,133 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:02:06,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:02:06,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 20:02:06,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:02:06,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:02:06,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:02:06,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:02:06,167 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2020-07-21 20:02:06,167 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:06,192 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:06,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:02:06,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:02:06,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:02:06,202 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2020-07-21 20:02:06,203 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:06,213 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:06,214 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:02:06,214 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2020-07-21 20:02:06,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:02:06,269 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2020-07-21 20:02:06,270 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:06,279 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:06,285 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-07-21 20:02:06,286 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 24 treesize of output 10 [2020-07-21 20:02:06,286 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:06,292 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:06,292 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:02:06,293 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:47, output treesize:7 [2020-07-21 20:02:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:02:06,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:02:06,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:02:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:02:06,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887725976] [2020-07-21 20:02:06,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:02:06,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 20:02:06,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911098177] [2020-07-21 20:02:06,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 20:02:06,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:02:06,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 20:02:06,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 20:02:06,367 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 7 states. [2020-07-21 20:02:06,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:02:06,619 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-07-21 20:02:06,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 20:02:06,619 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-07-21 20:02:06,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:02:06,620 INFO L225 Difference]: With dead ends: 61 [2020-07-21 20:02:06,620 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 20:02:06,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-21 20:02:06,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 20:02:06,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-21 20:02:06,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 20:02:06,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-07-21 20:02:06,633 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 21 [2020-07-21 20:02:06,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:02:06,633 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-07-21 20:02:06,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 20:02:06,633 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-07-21 20:02:06,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 20:02:06,634 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:02:06,637 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:02:06,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:02:06,839 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:02:06,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:02:06,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1056872398, now seen corresponding path program 1 times [2020-07-21 20:02:06,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:02:06,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110148924] [2020-07-21 20:02:06,841 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:02:07,256 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:02:07,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:02:07,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-21 20:02:07,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:02:07,282 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-07-21 20:02:07,283 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 1 case distinctions, treesize of input 9 treesize of output 11 [2020-07-21 20:02:07,284 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:07,298 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:07,305 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 [2020-07-21 20:02:07,305 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:07,319 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:07,321 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 20:02:07,321 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:29 [2020-07-21 20:02:07,405 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:07,405 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 [2020-07-21 20:02:07,406 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:07,494 INFO L624 ElimStorePlain]: treesize reduction 14, result has 88.9 percent of original size [2020-07-21 20:02:07,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:02:07,501 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:07,528 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:07,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:02:07,543 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 [2020-07-21 20:02:07,544 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:07,581 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:07,588 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 20:02:07,608 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:07,629 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:07,630 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 45 treesize of output 48 [2020-07-21 20:02:07,631 INFO L544 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:07,676 INFO L624 ElimStorePlain]: treesize reduction 20, result has 70.6 percent of original size [2020-07-21 20:02:07,677 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 4 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:02:07,678 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:114, output treesize:27 [2020-07-21 20:02:07,820 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:07,821 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 [2020-07-21 20:02:07,822 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:07,934 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 20:02:07,935 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:07,937 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.base_34|, |v_#memory_int_44|, |v_#memory_$Pointer$.offset_32|, |v_#memory_int_45|, |v_#memory_int_43|], 4=[|v_#memory_int_47|]} [2020-07-21 20:02:07,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:02:07,943 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:08,011 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:08,016 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 20:02:08,063 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:08,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:02:08,068 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:08,105 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:08,109 INFO L544 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 20:02:08,137 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:08,140 INFO L544 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 20:02:08,169 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:08,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:02:08,193 INFO L350 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2020-07-21 20:02:08,193 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 50 [2020-07-21 20:02:08,195 INFO L544 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:08,238 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:08,241 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 6 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-21 20:02:08,241 INFO L244 ElimStorePlain]: Needed 8 recursive calls to eliminate 10 variables, input treesize:319, output treesize:41 [2020-07-21 20:02:08,380 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 31 treesize of output 13 [2020-07-21 20:02:08,381 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:08,388 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:08,389 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:02:08,389 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:43, output treesize:3 [2020-07-21 20:02:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:02:08,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:02:08,449 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.base_34|, |v_#memory_int_44|, |v_#memory_$Pointer$.offset_32|, |v_#memory_int_45|], 3=[|v_#memory_int_43|]} [2020-07-21 20:02:08,461 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:08,679 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2020-07-21 20:02:08,680 INFO L624 ElimStorePlain]: treesize reduction 154, result has 51.4 percent of original size [2020-07-21 20:02:08,690 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 20:02:08,732 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:08,739 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 20:02:08,876 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 20:02:08,877 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:08,887 INFO L544 ElimStorePlain]: Start of recursive call 5: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2020-07-21 20:02:09,060 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 20:02:09,060 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:02:09,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110148924] [2020-07-21 20:02:09,064 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2020-07-21 20:02:09,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:02:09,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-07-21 20:02:09,064 ERROR L206 FreeRefinementEngine]: Strategy FIXED_PREFERENCES failed to provide any proof altough trace is infeasible [2020-07-21 20:02:09,065 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 20:02:09,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:02:09,288 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-07-21 20:02:09,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:02:09 BoogieIcfgContainer [2020-07-21 20:02:09,289 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:02:09,291 INFO L168 Benchmark]: Toolchain (without parser) took 10128.92 ms. Allocated memory was 137.4 MB in the beginning and 294.6 MB in the end (delta: 157.3 MB). Free memory was 99.9 MB in the beginning and 208.5 MB in the end (delta: -108.7 MB). Peak memory consumption was 48.6 MB. Max. memory is 7.1 GB. [2020-07-21 20:02:09,292 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 118.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 20:02:09,292 INFO L168 Benchmark]: CACSL2BoogieTranslator took 670.22 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 99.4 MB in the beginning and 168.8 MB in the end (delta: -69.3 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. [2020-07-21 20:02:09,293 INFO L168 Benchmark]: Boogie Preprocessor took 89.15 ms. Allocated memory is still 201.3 MB. Free memory was 168.8 MB in the beginning and 165.3 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 7.1 GB. [2020-07-21 20:02:09,293 INFO L168 Benchmark]: RCFGBuilder took 768.05 ms. Allocated memory is still 201.3 MB. Free memory was 165.3 MB in the beginning and 113.7 MB in the end (delta: 51.6 MB). Peak memory consumption was 51.6 MB. Max. memory is 7.1 GB. [2020-07-21 20:02:09,294 INFO L168 Benchmark]: TraceAbstraction took 8593.55 ms. Allocated memory was 201.3 MB in the beginning and 294.6 MB in the end (delta: 93.3 MB). Free memory was 113.0 MB in the beginning and 208.5 MB in the end (delta: -95.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 20:02:09,296 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 118.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 670.22 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 99.4 MB in the beginning and 168.8 MB in the end (delta: -69.3 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 89.15 ms. Allocated memory is still 201.3 MB. Free memory was 168.8 MB in the beginning and 165.3 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 768.05 ms. Allocated memory is still 201.3 MB. Free memory was 165.3 MB in the beginning and 113.7 MB in the end (delta: 51.6 MB). Peak memory consumption was 51.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8593.55 ms. Allocated memory was 201.3 MB in the beginning and 294.6 MB in the end (delta: 93.3 MB). Free memory was 113.0 MB in the beginning and 208.5 MB in the end (delta: -95.5 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 1031]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L987] struct TSLL* null = malloc(sizeof(struct TSLL)); [L988] null->next = ((void*)0) [L989] null->prev = ((void*)0) [L990] null->colour = BLACK [L992] struct TSLL* list = malloc(sizeof(struct TSLL)); [L993] list->next = null [L994] list->prev = null [L995] list->colour = BLACK [L997] struct TSLL* end = list; [L1000] COND TRUE __VERIFIER_nondet_int() [L1003] end->next = malloc(sizeof(struct TSLL)) [L1004] EXPR end->next [L1004] end->next->prev = end [L1005] EXPR end->next [L1005] end = end->next [L1006] end->next = null [L1008] COND FALSE !(__VERIFIER_nondet_int()) [L1014] end->colour = RED [L1015] end->next = malloc(sizeof(struct TSLL)) [L1016] EXPR end->next [L1016] end->next->prev = end [L1017] EXPR end->next [L1017] end = end->next [L1018] end->next = null [L1019] end->colour = BLACK [L1021] EXPR end->colour [L1021] COND FALSE !(!(BLACK == end->colour)) [L1022] EXPR end->next [L1022] COND FALSE !(!(null == end->next)) [L1023] COND FALSE !(!(null != end)) [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1026] end = null [L1027] end = list [L1030] COND FALSE !(!(null != end)) [L1031] EXPR end->colour [L1031] COND TRUE !(BLACK == end->colour) [L1031] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 52 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 8.4s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 233 SDtfs, 183 SDslu, 436 SDs, 0 SdLazy, 294 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred 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, 35 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 107 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 120 ConstructedInterpolants, 1 QuantifiedInterpolants, 16487 SizeOfPredicates, 38 NumberOfNonLiveVariables, 562 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 8 InterpolantComputations, 6 PerfectInterpolantSequences, 2/4 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...