/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:57:35,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:57:35,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:57:35,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:57:35,801 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:57:35,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:57:35,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:57:35,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:57:35,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:57:35,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:57:35,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:57:35,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:57:35,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:57:35,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:57:35,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:57:35,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:57:35,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:57:35,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:57:35,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:57:35,844 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:57:35,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:57:35,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:57:35,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:57:35,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:57:35,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 21:57:35,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 21:57:35,859 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 21:57:35,862 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 21:57:35,862 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 21:57:35,863 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 21:57:35,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 21:57:35,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 21:57:35,866 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 21:57:35,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 21:57:35,868 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 21:57:35,868 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 21:57:35,869 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 21:57:35,869 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 21:57:35,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:57:35,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:57:35,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:57:35,873 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 21:57:35,912 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:57:35,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:57:35,915 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:57:35,915 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:57:35,915 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:57:35,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:57:35,916 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:57:35,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:57:35,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:57:35,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:57:35,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:57:35,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:57:35,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:57:35,921 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:57:35,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:57:35,923 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:57:35,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:57:35,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:57:35,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:57:35,924 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:57:35,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:57:35,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:57:35,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:57:35,924 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:57:35,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:57:35,925 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:57:35,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:35,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:57:35,925 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:57:35,925 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 21:57:36,215 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:57:36,238 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:57:36,242 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:57:36,247 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:57:36,248 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:57:36,248 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-07-20 21:57:36,333 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/278369173/4b4600a5427a4508a8ffa5ffd5c774a0/FLAG641ce7759 [2020-07-20 21:57:36,970 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:57:36,974 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-07-20 21:57:37,000 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/278369173/4b4600a5427a4508a8ffa5ffd5c774a0/FLAG641ce7759 [2020-07-20 21:57:37,175 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/278369173/4b4600a5427a4508a8ffa5ffd5c774a0 [2020-07-20 21:57:37,186 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:57:37,189 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:57:37,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:57:37,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:57:37,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:57:37,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:57:37" (1/1) ... [2020-07-20 21:57:37,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@217ba61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:57:37, skipping insertion in model container [2020-07-20 21:57:37,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:57:37" (1/1) ... [2020-07-20 21:57:37,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:57:37,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:57:37,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:57:37,744 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:57:37,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:57:37,854 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:57:37,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:57:37 WrapperNode [2020-07-20 21:57:37,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:57:37,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:57:37,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:57:37,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:57:37,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:57:37" (1/1) ... [2020-07-20 21:57:37,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:57:37" (1/1) ... [2020-07-20 21:57:37,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:57:37" (1/1) ... [2020-07-20 21:57:37,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:57:37" (1/1) ... [2020-07-20 21:57:37,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:57:37" (1/1) ... [2020-07-20 21:57:37,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:57:37" (1/1) ... [2020-07-20 21:57:37,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:57:37" (1/1) ... [2020-07-20 21:57:37,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:57:37,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:57:37,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:57:37,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:57:37,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:57:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:57:37,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:57:37,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:57:37,996 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 21:57:37,996 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 21:57:37,996 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-20 21:57:37,997 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-07-20 21:57:37,997 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:57:37,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:57:37,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:57:37,997 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 21:57:37,997 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 21:57:37,998 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 21:57:37,998 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 21:57:37,998 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 21:57:37,998 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 21:57:37,998 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 21:57:37,998 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 21:57:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 21:57:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 21:57:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 21:57:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 21:57:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 21:57:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 21:57:38,000 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 21:57:38,000 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 21:57:38,000 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 21:57:38,000 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 21:57:38,000 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 21:57:38,000 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 21:57:38,001 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 21:57:38,001 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 21:57:38,001 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 21:57:38,001 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 21:57:38,001 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 21:57:38,001 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 21:57:38,002 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 21:57:38,002 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 21:57:38,002 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 21:57:38,002 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 21:57:38,002 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 21:57:38,002 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 21:57:38,003 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 21:57:38,003 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 21:57:38,003 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 21:57:38,003 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 21:57:38,003 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 21:57:38,003 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 21:57:38,003 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 21:57:38,003 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 21:57:38,003 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 21:57:38,004 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 21:57:38,004 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 21:57:38,004 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 21:57:38,004 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 21:57:38,004 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 21:57:38,004 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 21:57:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 21:57:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 21:57:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 21:57:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 21:57:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 21:57:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 21:57:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 21:57:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 21:57:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 21:57:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 21:57:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 21:57:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 21:57:38,007 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 21:57:38,007 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 21:57:38,007 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 21:57:38,007 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 21:57:38,007 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 21:57:38,007 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 21:57:38,008 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 21:57:38,008 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 21:57:38,008 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 21:57:38,008 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 21:57:38,008 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 21:57:38,008 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 21:57:38,009 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 21:57:38,009 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 21:57:38,009 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 21:57:38,009 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 21:57:38,009 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 21:57:38,009 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 21:57:38,009 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 21:57:38,010 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 21:57:38,010 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 21:57:38,010 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 21:57:38,010 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 21:57:38,010 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 21:57:38,010 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 21:57:38,010 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 21:57:38,010 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 21:57:38,010 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 21:57:38,010 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 21:57:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 21:57:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 21:57:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 21:57:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 21:57:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 21:57:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 21:57:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 21:57:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 21:57:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 21:57:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 21:57:38,012 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 21:57:38,012 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 21:57:38,012 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 21:57:38,012 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 21:57:38,012 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 21:57:38,012 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 21:57:38,012 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 21:57:38,012 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-20 21:57:38,012 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-07-20 21:57:38,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 21:57:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 21:57:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 21:57:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:57:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 21:57:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 21:57:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 21:57:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:57:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:57:38,380 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-20 21:57:38,630 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:57:38,630 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 21:57:38,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:57:38 BoogieIcfgContainer [2020-07-20 21:57:38,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:57:38,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:57:38,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:57:38,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:57:38,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:57:37" (1/3) ... [2020-07-20 21:57:38,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55249881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:57:38, skipping insertion in model container [2020-07-20 21:57:38,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:57:37" (2/3) ... [2020-07-20 21:57:38,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55249881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:57:38, skipping insertion in model container [2020-07-20 21:57:38,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:57:38" (3/3) ... [2020-07-20 21:57:38,644 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-07-20 21:57:38,656 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:57:38,665 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:57:38,679 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:57:38,700 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:57:38,700 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:57:38,700 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:57:38,701 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:57:38,701 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:57:38,702 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:57:38,702 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:57:38,702 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:57:38,717 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-07-20 21:57:38,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 21:57:38,725 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:57:38,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:57:38,726 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:57:38,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:57:38,732 INFO L82 PathProgramCache]: Analyzing trace with hash 248267832, now seen corresponding path program 1 times [2020-07-20 21:57:38,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:57:38,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401514632] [2020-07-20 21:57:38,739 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:38,955 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:57:38,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:57:38,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:57:38,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:57:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:57:39,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:57:39,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401514632] [2020-07-20 21:57:39,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:57:39,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:57:39,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778673945] [2020-07-20 21:57:39,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:57:39,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:57:39,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:57:39,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:57:39,086 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 5 states. [2020-07-20 21:57:39,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:57:39,164 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2020-07-20 21:57:39,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:57:39,166 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-20 21:57:39,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:57:39,175 INFO L225 Difference]: With dead ends: 73 [2020-07-20 21:57:39,175 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 21:57:39,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:57:39,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 21:57:39,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-07-20 21:57:39,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 21:57:39,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2020-07-20 21:57:39,221 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 20 [2020-07-20 21:57:39,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:57:39,222 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2020-07-20 21:57:39,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:57:39,222 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2020-07-20 21:57:39,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 21:57:39,224 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:57:39,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:57:39,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:39,440 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:57:39,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:57:39,441 INFO L82 PathProgramCache]: Analyzing trace with hash 215856973, now seen corresponding path program 1 times [2020-07-20 21:57:39,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:57:39,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946249430] [2020-07-20 21:57:39,443 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:39,583 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:57:39,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:57:39,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 21:57:39,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:57:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:57:39,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:57:39,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946249430] [2020-07-20 21:57:39,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:57:39,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:57:39,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036692446] [2020-07-20 21:57:39,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:57:39,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:57:39,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:57:39,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:57:39,614 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 3 states. [2020-07-20 21:57:39,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:57:39,641 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2020-07-20 21:57:39,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:57:39,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-20 21:57:39,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:57:39,643 INFO L225 Difference]: With dead ends: 63 [2020-07-20 21:57:39,643 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 21:57:39,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:57:39,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 21:57:39,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-07-20 21:57:39,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 21:57:39,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2020-07-20 21:57:39,652 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 27 [2020-07-20 21:57:39,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:57:39,652 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2020-07-20 21:57:39,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:57:39,653 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2020-07-20 21:57:39,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 21:57:39,654 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:57:39,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:57:39,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:39,868 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:57:39,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:57:39,869 INFO L82 PathProgramCache]: Analyzing trace with hash -795260277, now seen corresponding path program 1 times [2020-07-20 21:57:39,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:57:39,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87794720] [2020-07-20 21:57:39,871 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:40,002 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:57:40,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:57:40,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 21:57:40,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:57:40,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:57:40,078 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2020-07-20 21:57:40,079 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:57:40,090 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:57:40,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:57:40,097 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2020-07-20 21:57:40,098 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:57:40,111 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:57:40,112 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:57:40,112 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:37 [2020-07-20 21:57:40,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:57:40,248 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 28 treesize of output 10 [2020-07-20 21:57:40,249 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:57:40,264 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:57:40,271 INFO L350 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2020-07-20 21:57:40,272 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 28 treesize of output 10 [2020-07-20 21:57:40,274 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:57:40,280 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:57:40,281 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:57:40,281 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:55, output treesize:7 [2020-07-20 21:57:40,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:57:40,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:57:40,589 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2020-07-20 21:57:40,595 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:57:40,606 INFO L624 ElimStorePlain]: treesize reduction 17, result has 15.0 percent of original size [2020-07-20 21:57:40,607 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:57:40,613 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:57:40,617 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2020-07-20 21:57:40,621 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-20 21:57:40,632 INFO L624 ElimStorePlain]: treesize reduction 17, result has 15.0 percent of original size [2020-07-20 21:57:40,632 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:57:40,642 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:57:40,642 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-20 21:57:40,643 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:39, output treesize:7 [2020-07-20 21:57:40,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:57:40,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87794720] [2020-07-20 21:57:40,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:57:40,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-20 21:57:40,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479760963] [2020-07-20 21:57:40,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 21:57:40,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:57:40,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 21:57:40,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-07-20 21:57:40,655 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 14 states. [2020-07-20 21:57:40,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:57:40,990 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2020-07-20 21:57:40,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:57:40,990 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-07-20 21:57:40,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:57:40,992 INFO L225 Difference]: With dead ends: 69 [2020-07-20 21:57:40,992 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 21:57:40,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:57:40,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 21:57:41,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2020-07-20 21:57:41,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 21:57:41,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-07-20 21:57:41,002 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 27 [2020-07-20 21:57:41,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:57:41,003 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-07-20 21:57:41,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 21:57:41,003 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-07-20 21:57:41,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 21:57:41,004 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:57:41,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:57:41,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:41,218 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:57:41,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:57:41,219 INFO L82 PathProgramCache]: Analyzing trace with hash 109910721, now seen corresponding path program 1 times [2020-07-20 21:57:41,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:57:41,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355841915] [2020-07-20 21:57:41,221 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:41,376 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:57:41,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:57:41,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 21:57:41,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:57:41,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:57:41,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:57:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:57:41,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355841915] [2020-07-20 21:57:41,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:57:41,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-20 21:57:41,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110386713] [2020-07-20 21:57:41,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 21:57:41,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:57:41,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 21:57:41,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 21:57:41,498 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 9 states. [2020-07-20 21:57:41,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:57:41,556 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2020-07-20 21:57:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:57:41,568 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-20 21:57:41,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:57:41,569 INFO L225 Difference]: With dead ends: 59 [2020-07-20 21:57:41,569 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 21:57:41,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-07-20 21:57:41,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 21:57:41,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-07-20 21:57:41,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 21:57:41,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-07-20 21:57:41,577 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 28 [2020-07-20 21:57:41,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:57:41,578 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-07-20 21:57:41,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 21:57:41,578 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-07-20 21:57:41,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 21:57:41,579 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:57:41,579 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:57:41,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:41,793 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:57:41,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:57:41,794 INFO L82 PathProgramCache]: Analyzing trace with hash 260013466, now seen corresponding path program 1 times [2020-07-20 21:57:41,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:57:41,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050977839] [2020-07-20 21:57:41,796 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:42,761 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:57:42,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:57:42,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 21:57:42,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:57:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:57:42,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:57:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:57:42,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050977839] [2020-07-20 21:57:42,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:57:42,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-07-20 21:57:42,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663501292] [2020-07-20 21:57:42,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 21:57:42,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:57:42,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 21:57:42,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 21:57:42,941 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 11 states. [2020-07-20 21:57:43,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:57:43,011 INFO L93 Difference]: Finished difference Result 70 states and 91 transitions. [2020-07-20 21:57:43,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:57:43,011 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-07-20 21:57:43,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:57:43,012 INFO L225 Difference]: With dead ends: 70 [2020-07-20 21:57:43,013 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 21:57:43,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:57:43,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 21:57:43,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-07-20 21:57:43,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 21:57:43,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2020-07-20 21:57:43,020 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 34 [2020-07-20 21:57:43,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:57:43,020 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2020-07-20 21:57:43,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 21:57:43,021 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2020-07-20 21:57:43,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 21:57:43,022 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:57:43,022 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:57:43,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:43,223 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:57:43,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:57:43,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1408994219, now seen corresponding path program 2 times [2020-07-20 21:57:43,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:57:43,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003064193] [2020-07-20 21:57:43,226 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:48,440 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:57:48,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:57:48,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 21:57:48,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:57:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:57:48,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:57:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:57:48,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003064193] [2020-07-20 21:57:48,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:57:48,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-20 21:57:48,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609583735] [2020-07-20 21:57:48,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 21:57:48,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:57:48,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 21:57:48,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-07-20 21:57:48,695 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand 13 states. [2020-07-20 21:57:48,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:57:48,769 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2020-07-20 21:57:48,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:57:48,770 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-07-20 21:57:48,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:57:48,771 INFO L225 Difference]: With dead ends: 77 [2020-07-20 21:57:48,771 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 21:57:48,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-07-20 21:57:48,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 21:57:48,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-20 21:57:48,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 21:57:48,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2020-07-20 21:57:48,778 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 41 [2020-07-20 21:57:48,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:57:48,779 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2020-07-20 21:57:48,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 21:57:48,779 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2020-07-20 21:57:48,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 21:57:48,780 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:57:48,780 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:57:48,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:57:48,981 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:57:48,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:57:48,982 INFO L82 PathProgramCache]: Analyzing trace with hash -2107131782, now seen corresponding path program 3 times [2020-07-20 21:57:48,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:57:48,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124219548] [2020-07-20 21:57:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in