/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --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 13:42:25,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:42:25,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:42:25,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:42:25,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:42:25,990 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:42:25,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:42:26,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:42:26,009 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:42:26,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:42:26,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:42:26,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:42:26,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:42:26,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:42:26,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:42:26,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:42:26,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:42:26,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:42:26,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:42:26,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:42:26,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:42:26,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:42:26,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:42:26,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:42:26,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 13:42:26,043 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 13:42:26,044 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 13:42:26,046 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 13:42:26,046 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 13:42:26,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 13:42:26,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 13:42:26,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 13:42:26,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 13:42:26,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 13:42:26,052 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 13:42:26,052 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 13:42:26,053 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 13:42:26,053 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 13:42:26,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 13:42:26,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 13:42:26,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 13:42:26,057 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 13:42:26,093 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:42:26,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:42:26,095 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:42:26,095 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:42:26,098 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:42:26,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:42:26,099 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:42:26,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:42:26,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:42:26,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:42:26,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:42:26,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:42:26,100 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:42:26,100 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:42:26,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:42:26,101 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:42:26,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:42:26,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:42:26,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:42:26,102 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:42:26,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:42:26,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:42:26,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:42:26,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:42:26,103 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:42:26,103 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:42:26,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:42:26,103 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:42:26,104 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:42:26,104 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS 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 13:42:26,400 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:42:26,413 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:42:26,417 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:42:26,418 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:42:26,419 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:42:26,419 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-07-21 13:42:26,481 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/973feceee/a9184da2518f4aaa94c51bafaf80d09f/FLAG0bb0a34f0 [2020-07-21 13:42:27,006 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:42:27,008 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-07-21 13:42:27,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/973feceee/a9184da2518f4aaa94c51bafaf80d09f/FLAG0bb0a34f0 [2020-07-21 13:42:27,307 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/973feceee/a9184da2518f4aaa94c51bafaf80d09f [2020-07-21 13:42:27,315 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:42:27,319 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:42:27,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:42:27,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:42:27,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:42:27,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:42:27" (1/1) ... [2020-07-21 13:42:27,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34c8121f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:27, skipping insertion in model container [2020-07-21 13:42:27,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:42:27" (1/1) ... [2020-07-21 13:42:27,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:42:27,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:42:27,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:42:27,842 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:42:27,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:42:27,954 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:42:27,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:27 WrapperNode [2020-07-21 13:42:27,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:42:27,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:42:27,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:42:27,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:42:27,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:27" (1/1) ... [2020-07-21 13:42:27,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:27" (1/1) ... [2020-07-21 13:42:27,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:27" (1/1) ... [2020-07-21 13:42:27,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:27" (1/1) ... [2020-07-21 13:42:28,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:27" (1/1) ... [2020-07-21 13:42:28,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:27" (1/1) ... [2020-07-21 13:42:28,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:27" (1/1) ... [2020-07-21 13:42:28,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:42:28,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:42:28,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:42:28,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:42:28,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:27" (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 13:42:28,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:42:28,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:42:28,078 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:42:28,079 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 13:42:28,079 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 13:42:28,079 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 13:42:28,079 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 13:42:28,079 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 13:42:28,079 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 13:42:28,080 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 13:42:28,080 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 13:42:28,080 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 13:42:28,080 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 13:42:28,080 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 13:42:28,080 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 13:42:28,081 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 13:42:28,081 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 13:42:28,081 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 13:42:28,081 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 13:42:28,081 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 13:42:28,081 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 13:42:28,082 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 13:42:28,082 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 13:42:28,082 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 13:42:28,082 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 13:42:28,082 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 13:42:28,082 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 13:42:28,083 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 13:42:28,083 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 13:42:28,083 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 13:42:28,083 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 13:42:28,083 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 13:42:28,083 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 13:42:28,084 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 13:42:28,084 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 13:42:28,084 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 13:42:28,084 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 13:42:28,084 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 13:42:28,084 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 13:42:28,085 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 13:42:28,085 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 13:42:28,085 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 13:42:28,085 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 13:42:28,085 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 13:42:28,085 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 13:42:28,085 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 13:42:28,086 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 13:42:28,086 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 13:42:28,086 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 13:42:28,086 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 13:42:28,086 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 13:42:28,086 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 13:42:28,086 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 13:42:28,087 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 13:42:28,087 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 13:42:28,087 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 13:42:28,087 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 13:42:28,087 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 13:42:28,087 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 13:42:28,088 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 13:42:28,088 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 13:42:28,088 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 13:42:28,088 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 13:42:28,088 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 13:42:28,088 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 13:42:28,088 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 13:42:28,089 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 13:42:28,089 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 13:42:28,089 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 13:42:28,089 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 13:42:28,089 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 13:42:28,089 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 13:42:28,089 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 13:42:28,090 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 13:42:28,090 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 13:42:28,090 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 13:42:28,090 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 13:42:28,090 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 13:42:28,090 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 13:42:28,091 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 13:42:28,091 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 13:42:28,091 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 13:42:28,091 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 13:42:28,091 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 13:42:28,091 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 13:42:28,091 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 13:42:28,092 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 13:42:28,092 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 13:42:28,092 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 13:42:28,092 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 13:42:28,092 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 13:42:28,092 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 13:42:28,093 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 13:42:28,093 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 13:42:28,093 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 13:42:28,093 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 13:42:28,093 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 13:42:28,093 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 13:42:28,093 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 13:42:28,094 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 13:42:28,094 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 13:42:28,094 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 13:42:28,094 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 13:42:28,094 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 13:42:28,094 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 13:42:28,094 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 13:42:28,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 13:42:28,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:42:28,095 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:42:28,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 13:42:28,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 13:42:28,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 13:42:28,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 13:42:28,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 13:42:28,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 13:42:28,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:42:28,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:42:28,696 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:42:28,696 INFO L295 CfgBuilder]: Removed 17 assume(true) statements. [2020-07-21 13:42:28,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:42:28 BoogieIcfgContainer [2020-07-21 13:42:28,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:42:28,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:42:28,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:42:28,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:42:28,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:42:27" (1/3) ... [2020-07-21 13:42:28,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35bd4568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:42:28, skipping insertion in model container [2020-07-21 13:42:28,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:27" (2/3) ... [2020-07-21 13:42:28,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35bd4568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:42:28, skipping insertion in model container [2020-07-21 13:42:28,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:42:28" (3/3) ... [2020-07-21 13:42:28,713 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2020-07-21 13:42:28,725 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:42:28,736 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-07-21 13:42:28,757 INFO L251 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-07-21 13:42:28,792 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:42:28,792 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:42:28,793 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:42:28,793 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:42:28,793 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:42:28,793 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:42:28,794 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:42:28,794 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:42:28,820 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2020-07-21 13:42:28,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 13:42:28,835 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:42:28,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:42:28,838 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 13:42:28,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:42:28,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1255802584, now seen corresponding path program 1 times [2020-07-21 13:42:28,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:42:28,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98554783] [2020-07-21 13:42:28,856 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 13:42:29,086 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:42:29,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:42:29,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 13:42:29,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:42:29,197 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 13:42:29,201 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:29,210 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:29,210 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:42:29,211 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2020-07-21 13:42:29,230 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 13:42:29,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:42:29,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98554783] [2020-07-21 13:42:29,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:42:29,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 13:42:29,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552141666] [2020-07-21 13:42:29,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 13:42:29,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:42:29,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 13:42:29,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 13:42:29,256 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 4 states. [2020-07-21 13:42:29,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:42:29,400 INFO L93 Difference]: Finished difference Result 104 states and 170 transitions. [2020-07-21 13:42:29,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 13:42:29,402 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-07-21 13:42:29,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:42:29,413 INFO L225 Difference]: With dead ends: 104 [2020-07-21 13:42:29,414 INFO L226 Difference]: Without dead ends: 49 [2020-07-21 13:42:29,418 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 13:42:29,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-21 13:42:29,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-07-21 13:42:29,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 13:42:29,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-07-21 13:42:29,463 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 10 [2020-07-21 13:42:29,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:42:29,464 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-07-21 13:42:29,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 13:42:29,464 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-07-21 13:42:29,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 13:42:29,465 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:42:29,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:42:29,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:42:29,681 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 13:42:29,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:42:29,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1890143313, now seen corresponding path program 1 times [2020-07-21 13:42:29,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:42:29,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146326941] [2020-07-21 13:42:29,683 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 13:42:30,264 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:42:30,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:42:30,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 13:42:30,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:42:30,281 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 13:42:30,282 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:30,292 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:30,293 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:42:30,293 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-21 13:42:30,310 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 13:42:30,311 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:30,314 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:30,315 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 13:42:30,315 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-21 13:42:30,321 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 13:42:30,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:42:30,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146326941] [2020-07-21 13:42:30,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:42:30,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 13:42:30,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182887214] [2020-07-21 13:42:30,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 13:42:30,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:42:30,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 13:42:30,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 13:42:30,325 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 4 states. [2020-07-21 13:42:30,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:42:30,397 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-07-21 13:42:30,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 13:42:30,398 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-07-21 13:42:30,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:42:30,399 INFO L225 Difference]: With dead ends: 43 [2020-07-21 13:42:30,399 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 13:42:30,400 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 13:42:30,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 13:42:30,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-21 13:42:30,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 13:42:30,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-07-21 13:42:30,408 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 12 [2020-07-21 13:42:30,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:42:30,408 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-07-21 13:42:30,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 13:42:30,409 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-07-21 13:42:30,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 13:42:30,409 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:42:30,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:42:30,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:42:30,624 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 13:42:30,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:42:30,624 INFO L82 PathProgramCache]: Analyzing trace with hash 290038970, now seen corresponding path program 1 times [2020-07-21 13:42:30,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:42:30,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203851711] [2020-07-21 13:42:30,626 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 13:42:30,745 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:42:30,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:42:30,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:42:30,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:42:30,769 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 13:42:30,770 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:30,772 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:30,773 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:42:30,773 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-21 13:42:30,800 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 13:42:30,801 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:30,804 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:30,805 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 13:42:30,805 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-21 13:42:30,812 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 13:42:30,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:42:30,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203851711] [2020-07-21 13:42:30,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:42:30,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 13:42:30,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874305352] [2020-07-21 13:42:30,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 13:42:30,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:42:30,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 13:42:30,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:42:30,817 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2020-07-21 13:42:30,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:42:30,955 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-07-21 13:42:30,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 13:42:30,956 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 13:42:30,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:42:30,957 INFO L225 Difference]: With dead ends: 66 [2020-07-21 13:42:30,958 INFO L226 Difference]: Without dead ends: 64 [2020-07-21 13:42:30,958 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 13:42:30,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-21 13:42:30,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2020-07-21 13:42:30,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-21 13:42:30,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-07-21 13:42:30,968 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 14 [2020-07-21 13:42:30,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:42:30,968 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-07-21 13:42:30,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 13:42:30,969 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-07-21 13:42:30,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 13:42:30,970 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:42:30,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:42:31,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:42:31,186 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 13:42:31,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:42:31,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2060721718, now seen corresponding path program 1 times [2020-07-21 13:42:31,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:42:31,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033640003] [2020-07-21 13:42:31,188 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 13:42:31,324 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:42:31,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:42:31,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 13:42:31,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:42:31,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:42:31,486 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-07-21 13:42:31,488 INFO L350 Elim1Store]: treesize reduction 106, result has 48.5 percent of original size [2020-07-21 13:42:31,489 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 13:42:31,490 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:31,644 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-07-21 13:42:31,645 INFO L624 ElimStorePlain]: treesize reduction 36, result has 80.1 percent of original size [2020-07-21 13:42:31,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:42:31,817 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-07-21 13:42:31,818 INFO L350 Elim1Store]: treesize reduction 115, result has 44.2 percent of original size [2020-07-21 13:42:31,819 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 13:42:31,820 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:31,952 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-07-21 13:42:31,953 INFO L624 ElimStorePlain]: treesize reduction 36, result has 78.6 percent of original size [2020-07-21 13:42:31,958 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 13:42:31,966 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 13:42:31,969 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-07-21 13:42:31,980 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 13:42:31,981 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 13:42:31,988 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 13:42:31,993 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-07-21 13:42:31,997 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 13:42:32,000 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 13:42:32,003 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 13:42:32,005 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 13:42:32,007 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-07-21 13:42:32,012 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 13:42:32,015 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 13:42:32,016 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-07-21 13:42:32,021 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-07-21 13:42:32,025 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-07-21 13:42:32,026 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 13:42:32,032 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 13:42:32,039 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-07-21 13:42:32,042 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 13:42:32,045 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 13:42:32,052 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 13:42:32,059 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 13:42:32,068 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 13:42:32,072 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 13:42:32,074 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-07-21 13:42:32,083 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 13:42:32,086 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 13:42:32,088 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 13:42:32,088 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:149, output treesize:15 [2020-07-21 13:42:32,102 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 13:42:32,103 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:32,109 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:32,112 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 13:42:32,113 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:32,117 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:32,117 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 13:42:32,117 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:29, output treesize:7 [2020-07-21 13:42:32,127 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 13:42:32,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:42:32,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033640003] [2020-07-21 13:42:32,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:42:32,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 13:42:32,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205522213] [2020-07-21 13:42:32,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 13:42:32,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:42:32,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 13:42:32,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 13:42:32,131 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 4 states. [2020-07-21 13:42:32,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:42:32,213 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-07-21 13:42:32,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 13:42:32,214 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-07-21 13:42:32,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:42:32,214 INFO L225 Difference]: With dead ends: 48 [2020-07-21 13:42:32,215 INFO L226 Difference]: Without dead ends: 46 [2020-07-21 13:42:32,215 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 13:42:32,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-21 13:42:32,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-07-21 13:42:32,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 13:42:32,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-07-21 13:42:32,221 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 15 [2020-07-21 13:42:32,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:42:32,222 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-07-21 13:42:32,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 13:42:32,222 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-07-21 13:42:32,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 13:42:32,223 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:42:32,223 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 13:42:32,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:42:32,424 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 13:42:32,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:42:32,425 INFO L82 PathProgramCache]: Analyzing trace with hash 373775322, now seen corresponding path program 1 times [2020-07-21 13:42:32,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:42:32,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769333027] [2020-07-21 13:42:32,426 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 13:42:32,529 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:42:32,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:42:32,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 13:42:32,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:42:32,550 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-07-21 13:42:32,550 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 13:42:32,551 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:32,557 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:32,557 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:42:32,557 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:15 [2020-07-21 13:42:32,615 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:32,616 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 13:42:32,619 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:32,664 INFO L624 ElimStorePlain]: treesize reduction 28, result has 68.5 percent of original size [2020-07-21 13:42:32,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:42:32,668 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:32,682 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:32,685 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 13:42:32,685 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:59, output treesize:28 [2020-07-21 13:42:32,760 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:32,760 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 13:42:32,762 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:32,776 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:32,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:42:32,780 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:32,789 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:32,791 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 13:42:32,791 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:66, output treesize:4 [2020-07-21 13:42:32,796 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 13:42:32,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:42:32,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769333027] [2020-07-21 13:42:32,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:42:32,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 13:42:32,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892975758] [2020-07-21 13:42:32,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 13:42:32,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:42:32,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 13:42:32,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:42:32,798 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 5 states. [2020-07-21 13:42:32,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:42:32,943 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-07-21 13:42:32,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 13:42:32,943 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-21 13:42:32,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:42:32,944 INFO L225 Difference]: With dead ends: 46 [2020-07-21 13:42:32,944 INFO L226 Difference]: Without dead ends: 44 [2020-07-21 13:42:32,945 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 13:42:32,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-21 13:42:32,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-21 13:42:32,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 13:42:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-07-21 13:42:32,951 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 17 [2020-07-21 13:42:32,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:42:32,952 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-07-21 13:42:32,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 13:42:32,952 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-07-21 13:42:32,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 13:42:32,953 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:42:32,953 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 13:42:33,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:42:33,154 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 13:42:33,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:42:33,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1568846049, now seen corresponding path program 1 times [2020-07-21 13:42:33,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:42:33,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827486746] [2020-07-21 13:42:33,157 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 13:42:33,239 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:42:33,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:42:33,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 13:42:33,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:42:33,257 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 13:42:33,257 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:33,259 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:33,260 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:42:33,260 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-21 13:42:33,273 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 13:42:33,273 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:33,276 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:33,277 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 13:42:33,277 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-21 13:42:33,286 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 13:42:33,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:42:33,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827486746] [2020-07-21 13:42:33,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:42:33,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 13:42:33,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748941787] [2020-07-21 13:42:33,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 13:42:33,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:42:33,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 13:42:33,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:42:33,289 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 5 states. [2020-07-21 13:42:33,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:42:33,401 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2020-07-21 13:42:33,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 13:42:33,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-07-21 13:42:33,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:42:33,403 INFO L225 Difference]: With dead ends: 72 [2020-07-21 13:42:33,404 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 13:42:33,404 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 13:42:33,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 13:42:33,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2020-07-21 13:42:33,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 13:42:33,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-07-21 13:42:33,412 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 18 [2020-07-21 13:42:33,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:42:33,412 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-07-21 13:42:33,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 13:42:33,412 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-07-21 13:42:33,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 13:42:33,413 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:42:33,413 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 13:42:33,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:42:33,616 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 13:42:33,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:42:33,617 INFO L82 PathProgramCache]: Analyzing trace with hash 777661568, now seen corresponding path program 1 times [2020-07-21 13:42:33,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:42:33,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658730017] [2020-07-21 13:42:33,618 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 13:42:33,709 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:42:33,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:42:33,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 13:42:33,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:42:33,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:42:33,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:42:33,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:42:33,731 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 13:42:33,731 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:33,751 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:33,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:42:33,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:42:33,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:42:33,759 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 13:42:33,759 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:33,768 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:33,769 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:42:33,769 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2020-07-21 13:42:33,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:42:33,809 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 13:42:33,809 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:33,818 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:33,822 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-07-21 13:42:33,823 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 13:42:33,824 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:33,828 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:33,829 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 13:42:33,829 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:47, output treesize:7 [2020-07-21 13:42:33,841 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 13:42:33,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:42:33,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:42:33,896 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 13:42:33,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658730017] [2020-07-21 13:42:33,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:42:33,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 13:42:33,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416896246] [2020-07-21 13:42:33,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 13:42:33,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:42:33,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 13:42:33,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 13:42:33,898 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 7 states. [2020-07-21 13:42:34,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:42:34,210 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-07-21 13:42:34,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 13:42:34,210 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-07-21 13:42:34,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:42:34,211 INFO L225 Difference]: With dead ends: 61 [2020-07-21 13:42:34,211 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 13:42:34,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-21 13:42:34,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 13:42:34,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-21 13:42:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 13:42:34,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-07-21 13:42:34,222 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 21 [2020-07-21 13:42:34,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:42:34,223 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-07-21 13:42:34,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 13:42:34,223 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-07-21 13:42:34,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 13:42:34,224 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:42:34,224 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 13:42:34,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:42:34,425 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 13:42:34,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:42:34,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1056872398, now seen corresponding path program 1 times [2020-07-21 13:42:34,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:42:34,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273646780] [2020-07-21 13:42:34,428 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 13:42:34,903 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:42:34,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:42:34,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-21 13:42:34,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:42:34,932 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-07-21 13:42:34,932 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 13:42:34,932 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:34,944 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:34,948 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 13:42:34,949 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:34,959 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:34,960 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 13:42:34,960 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:29 [2020-07-21 13:42:35,024 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:35,025 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 13:42:35,026 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:35,113 INFO L624 ElimStorePlain]: treesize reduction 14, result has 88.9 percent of original size [2020-07-21 13:42:35,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:42:35,118 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:35,152 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:35,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:42:35,163 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 13:42:35,164 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:35,192 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:35,197 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 13:42:35,216 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:35,232 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:35,233 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 13:42:35,234 INFO L544 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:35,276 INFO L624 ElimStorePlain]: treesize reduction 20, result has 70.6 percent of original size [2020-07-21 13:42:35,277 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 13:42:35,278 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:114, output treesize:27 [2020-07-21 13:42:35,395 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:35,396 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 13:42:35,411 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:35,522 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 13:42:35,522 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:35,526 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 13:42:35,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:42:35,534 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:35,599 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:35,602 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 13:42:35,655 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:35,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:42:35,659 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:35,687 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:35,690 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 13:42:35,716 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:35,718 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 13:42:35,736 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:35,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:42:35,760 INFO L350 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2020-07-21 13:42:35,760 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 13:42:35,761 INFO L544 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:35,780 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:35,782 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 13:42:35,783 INFO L244 ElimStorePlain]: Needed 8 recursive calls to eliminate 10 variables, input treesize:319, output treesize:41 [2020-07-21 13:42:35,881 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 13:42:35,882 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:35,888 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:35,889 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 13:42:35,890 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:43, output treesize:3 [2020-07-21 13:42:35,905 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 13:42:35,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:42:35,937 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.base_34|, |v_#memory_int_44|, |v_#memory_$Pointer$.offset_32|, |v_#memory_int_45|], 3=[|v_#memory_int_43|]} [2020-07-21 13:42:35,944 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:36,090 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2020-07-21 13:42:36,091 INFO L624 ElimStorePlain]: treesize reduction 154, result has 51.4 percent of original size [2020-07-21 13:42:36,098 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 13:42:36,126 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:36,131 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:36,254 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 13:42:36,255 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:36,263 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 13:42:36,431 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 13:42:36,432 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:36,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273646780] [2020-07-21 13:42:36,435 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2020-07-21 13:42:36,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:42:36,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-07-21 13:42:36,435 ERROR L206 FreeRefinementEngine]: Strategy FIXED_PREFERENCES failed to provide any proof altough trace is infeasible [2020-07-21 13:42:36,435 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 13:42:36,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:42:36,656 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-07-21 13:42:36,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:42:36 BoogieIcfgContainer [2020-07-21 13:42:36,656 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 13:42:36,658 INFO L168 Benchmark]: Toolchain (without parser) took 9341.21 ms. Allocated memory was 138.4 MB in the beginning and 283.1 MB in the end (delta: 144.7 MB). Free memory was 102.5 MB in the beginning and 168.2 MB in the end (delta: -65.8 MB). Peak memory consumption was 78.9 MB. Max. memory is 7.1 GB. [2020-07-21 13:42:36,658 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 13:42:36,659 INFO L168 Benchmark]: CACSL2BoogieTranslator took 634.30 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 102.0 MB in the beginning and 170.4 MB in the end (delta: -68.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. [2020-07-21 13:42:36,659 INFO L168 Benchmark]: Boogie Preprocessor took 66.32 ms. Allocated memory is still 202.9 MB. Free memory was 170.4 MB in the beginning and 166.9 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 7.1 GB. [2020-07-21 13:42:36,660 INFO L168 Benchmark]: RCFGBuilder took 680.06 ms. Allocated memory is still 202.9 MB. Free memory was 166.9 MB in the beginning and 115.3 MB in the end (delta: 51.6 MB). Peak memory consumption was 51.6 MB. Max. memory is 7.1 GB. [2020-07-21 13:42:36,661 INFO L168 Benchmark]: TraceAbstraction took 7953.52 ms. Allocated memory was 202.9 MB in the beginning and 283.1 MB in the end (delta: 80.2 MB). Free memory was 114.6 MB in the beginning and 168.2 MB in the end (delta: -53.6 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2020-07-21 13:42:36,663 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 634.30 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 102.0 MB in the beginning and 170.4 MB in the end (delta: -68.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 66.32 ms. Allocated memory is still 202.9 MB. Free memory was 170.4 MB in the beginning and 166.9 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 680.06 ms. Allocated memory is still 202.9 MB. Free memory was 166.9 MB in the beginning and 115.3 MB in the end (delta: 51.6 MB). Peak memory consumption was 51.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7953.52 ms. Allocated memory was 202.9 MB in the beginning and 283.1 MB in the end (delta: 80.2 MB). Free memory was 114.6 MB in the beginning and 168.2 MB in the end (delta: -53.6 MB). Peak memory consumption was 26.6 MB. 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: 7.8s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 1.0s, 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, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s 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, 0.6s SatisfiabilityAnalysisTime, 1.5s 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...