/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:48:00,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:48:00,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:48:00,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:48:00,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:48:00,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:48:00,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:48:00,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:48:00,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:48:00,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:48:00,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:48:00,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:48:00,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:48:00,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:48:00,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:48:00,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:48:00,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:48:00,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:48:00,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:48:00,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:48:01,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:48:01,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:48:01,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:48:01,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:48:01,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 16:48:01,010 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 16:48:01,010 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 16:48:01,011 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 16:48:01,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 16:48:01,012 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 16:48:01,012 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 16:48:01,013 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 16:48:01,014 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 16:48:01,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 16:48:01,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 16:48:01,015 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 16:48:01,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 16:48:01,016 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 16:48:01,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:48:01,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:48:01,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:48:01,019 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 [2020-08-22 16:48:01,041 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:48:01,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:48:01,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:48:01,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:48:01,043 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:48:01,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:48:01,044 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:48:01,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:48:01,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:48:01,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:48:01,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:48:01,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:48:01,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:48:01,045 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:48:01,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:48:01,045 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:48:01,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:48:01,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:48:01,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:48:01,046 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:48:01,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:48:01,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:48:01,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:48:01,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:48:01,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:48:01,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:48:01,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:48:01,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:48:01,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:48:01,048 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:48:01,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:48:01,400 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:48:01,404 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:48:01,406 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:48:01,406 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:48:01,407 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-08-22 16:48:01,472 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1ec52405/222f75ada0c8461b91bfcebb36913571/FLAG33ba6f7f0 [2020-08-22 16:48:02,030 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:48:02,030 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-08-22 16:48:02,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1ec52405/222f75ada0c8461b91bfcebb36913571/FLAG33ba6f7f0 [2020-08-22 16:48:02,319 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1ec52405/222f75ada0c8461b91bfcebb36913571 [2020-08-22 16:48:02,328 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:48:02,329 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:48:02,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:48:02,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:48:02,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:48:02,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:48:02" (1/1) ... [2020-08-22 16:48:02,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c7ca4c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:02, skipping insertion in model container [2020-08-22 16:48:02,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:48:02" (1/1) ... [2020-08-22 16:48:02,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:48:02,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:48:02,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:48:02,865 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:48:02,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:48:02,971 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:48:02,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:02 WrapperNode [2020-08-22 16:48:02,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:48:02,972 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:48:02,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:48:02,973 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:48:02,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:02" (1/1) ... [2020-08-22 16:48:02,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:02" (1/1) ... [2020-08-22 16:48:03,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:02" (1/1) ... [2020-08-22 16:48:03,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:02" (1/1) ... [2020-08-22 16:48:03,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:02" (1/1) ... [2020-08-22 16:48:03,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:02" (1/1) ... [2020-08-22 16:48:03,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:02" (1/1) ... [2020-08-22 16:48:03,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:48:03,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:48:03,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:48:03,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:48:03,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:02" (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 [2020-08-22 16:48:03,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:48:03,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:48:03,123 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-22 16:48:03,123 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-22 16:48:03,123 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-22 16:48:03,123 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:48:03,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:48:03,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:48:03,124 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-22 16:48:03,124 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-22 16:48:03,124 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-22 16:48:03,124 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-22 16:48:03,124 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-22 16:48:03,124 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-22 16:48:03,125 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-22 16:48:03,125 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-22 16:48:03,125 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-22 16:48:03,125 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-22 16:48:03,125 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-22 16:48:03,125 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-22 16:48:03,126 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-22 16:48:03,126 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-22 16:48:03,126 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-22 16:48:03,127 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-22 16:48:03,128 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-22 16:48:03,129 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-22 16:48:03,129 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-22 16:48:03,129 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-22 16:48:03,129 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-22 16:48:03,129 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-22 16:48:03,129 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-22 16:48:03,130 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-22 16:48:03,130 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-22 16:48:03,130 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-22 16:48:03,130 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-22 16:48:03,130 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-22 16:48:03,130 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-22 16:48:03,131 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-22 16:48:03,131 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-22 16:48:03,131 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-22 16:48:03,131 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-22 16:48:03,131 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-22 16:48:03,132 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-22 16:48:03,132 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-22 16:48:03,132 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-22 16:48:03,132 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-22 16:48:03,132 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-22 16:48:03,132 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-22 16:48:03,133 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-22 16:48:03,133 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-22 16:48:03,133 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-22 16:48:03,133 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-22 16:48:03,133 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-22 16:48:03,133 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-22 16:48:03,133 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-22 16:48:03,133 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-22 16:48:03,134 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-22 16:48:03,135 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-22 16:48:03,135 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-22 16:48:03,135 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-22 16:48:03,135 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 16:48:03,135 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 16:48:03,135 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-22 16:48:03,135 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 16:48:03,136 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-22 16:48:03,136 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-22 16:48:03,136 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-22 16:48:03,136 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-22 16:48:03,136 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-22 16:48:03,136 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 16:48:03,136 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-22 16:48:03,137 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-22 16:48:03,137 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-22 16:48:03,137 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 16:48:03,137 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-22 16:48:03,137 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-22 16:48:03,137 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-22 16:48:03,138 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-22 16:48:03,138 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-22 16:48:03,138 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-22 16:48:03,138 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-22 16:48:03,139 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-22 16:48:03,139 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-22 16:48:03,139 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-22 16:48:03,139 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-22 16:48:03,139 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-22 16:48:03,139 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-22 16:48:03,140 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-22 16:48:03,140 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-22 16:48:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-22 16:48:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-22 16:48:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-22 16:48:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-22 16:48:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-22 16:48:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-22 16:48:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-22 16:48:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-22 16:48:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-22 16:48:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-22 16:48:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-22 16:48:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-22 16:48:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-22 16:48:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-22 16:48:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-22 16:48:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-22 16:48:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-22 16:48:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-22 16:48:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-22 16:48:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-22 16:48:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-22 16:48:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-22 16:48:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-22 16:48:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-22 16:48:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-22 16:48:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:48:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 16:48:03,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 16:48:03,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 16:48:03,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 16:48:03,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 16:48:03,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 16:48:03,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:48:03,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:48:03,512 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-22 16:48:03,856 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:48:03,856 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-08-22 16:48:03,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:48:03 BoogieIcfgContainer [2020-08-22 16:48:03,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:48:03,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:48:03,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:48:03,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:48:03,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:48:02" (1/3) ... [2020-08-22 16:48:03,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1ca11c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:48:03, skipping insertion in model container [2020-08-22 16:48:03,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:02" (2/3) ... [2020-08-22 16:48:03,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1ca11c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:48:03, skipping insertion in model container [2020-08-22 16:48:03,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:48:03" (3/3) ... [2020-08-22 16:48:03,878 INFO L109 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2020-08-22 16:48:03,890 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:48:03,900 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:48:03,920 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:48:03,952 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:48:03,953 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:48:03,954 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:48:03,966 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:48:03,966 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:48:03,966 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:48:03,967 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:48:03,967 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:48:03,989 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-08-22 16:48:03,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 16:48:03,997 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:48:03,998 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] [2020-08-22 16:48:03,999 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:48:04,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:48:04,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1575706012, now seen corresponding path program 1 times [2020-08-22 16:48:04,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:48:04,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271908374] [2020-08-22 16:48:04,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:48:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:04,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:48:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:48:04,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271908374] [2020-08-22 16:48:04,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:48:04,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:48:04,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562123800] [2020-08-22 16:48:04,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:48:04,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:48:04,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:48:04,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:48:04,245 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 3 states. [2020-08-22 16:48:04,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:48:04,524 INFO L93 Difference]: Finished difference Result 108 states and 166 transitions. [2020-08-22 16:48:04,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:48:04,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 16:48:04,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:48:04,544 INFO L225 Difference]: With dead ends: 108 [2020-08-22 16:48:04,544 INFO L226 Difference]: Without dead ends: 47 [2020-08-22 16:48:04,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:48:04,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-22 16:48:04,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-08-22 16:48:04,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 16:48:04,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2020-08-22 16:48:04,608 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 20 [2020-08-22 16:48:04,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:48:04,610 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2020-08-22 16:48:04,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:48:04,610 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2020-08-22 16:48:04,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 16:48:04,612 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:48:04,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:48:04,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:48:04,613 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:48:04,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:48:04,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1627887593, now seen corresponding path program 1 times [2020-08-22 16:48:04,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:48:04,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459593366] [2020-08-22 16:48:04,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:48:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:04,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:48:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:48:04,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459593366] [2020-08-22 16:48:04,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:48:04,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 16:48:04,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851896125] [2020-08-22 16:48:04,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:48:04,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:48:04,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:48:04,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:48:04,743 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand 4 states. [2020-08-22 16:48:04,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:48:04,888 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2020-08-22 16:48:04,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 16:48:04,888 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-22 16:48:04,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:48:04,891 INFO L225 Difference]: With dead ends: 75 [2020-08-22 16:48:04,891 INFO L226 Difference]: Without dead ends: 55 [2020-08-22 16:48:04,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:48:04,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-22 16:48:04,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-08-22 16:48:04,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 16:48:04,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 77 transitions. [2020-08-22 16:48:04,902 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 77 transitions. Word has length 25 [2020-08-22 16:48:04,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:48:04,902 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 77 transitions. [2020-08-22 16:48:04,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:48:04,902 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 77 transitions. [2020-08-22 16:48:04,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 16:48:04,904 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:48:04,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:48:04,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:48:04,904 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:48:04,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:48:04,905 INFO L82 PathProgramCache]: Analyzing trace with hash -164754602, now seen corresponding path program 1 times [2020-08-22 16:48:04,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:48:04,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417666806] [2020-08-22 16:48:04,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:48:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:04,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:48:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:48:04,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417666806] [2020-08-22 16:48:04,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:48:04,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 16:48:04,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450547579] [2020-08-22 16:48:04,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:48:04,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:48:04,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:48:04,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:48:04,994 INFO L87 Difference]: Start difference. First operand 55 states and 77 transitions. Second operand 4 states. [2020-08-22 16:48:05,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:48:05,127 INFO L93 Difference]: Finished difference Result 93 states and 131 transitions. [2020-08-22 16:48:05,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 16:48:05,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-08-22 16:48:05,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:48:05,129 INFO L225 Difference]: With dead ends: 93 [2020-08-22 16:48:05,129 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 16:48:05,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:48:05,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 16:48:05,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-22 16:48:05,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 16:48:05,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2020-08-22 16:48:05,138 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 31 [2020-08-22 16:48:05,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:48:05,138 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2020-08-22 16:48:05,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:48:05,138 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2020-08-22 16:48:05,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 16:48:05,139 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:48:05,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:48:05,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 16:48:05,140 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:48:05,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:48:05,140 INFO L82 PathProgramCache]: Analyzing trace with hash -982403052, now seen corresponding path program 1 times [2020-08-22 16:48:05,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:48:05,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437597733] [2020-08-22 16:48:05,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:48:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:05,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:48:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:48:05,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437597733] [2020-08-22 16:48:05,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:48:05,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 16:48:05,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395573966] [2020-08-22 16:48:05,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:48:05,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:48:05,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:48:05,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:48:05,236 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand 6 states. [2020-08-22 16:48:05,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:48:05,441 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2020-08-22 16:48:05,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:48:05,442 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-08-22 16:48:05,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:48:05,444 INFO L225 Difference]: With dead ends: 82 [2020-08-22 16:48:05,444 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 16:48:05,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:48:05,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 16:48:05,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2020-08-22 16:48:05,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-22 16:48:05,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 91 transitions. [2020-08-22 16:48:05,455 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 91 transitions. Word has length 31 [2020-08-22 16:48:05,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:48:05,455 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 91 transitions. [2020-08-22 16:48:05,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:48:05,456 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 91 transitions. [2020-08-22 16:48:05,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 16:48:05,457 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:48:05,458 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:48:05,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 16:48:05,458 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:48:05,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:48:05,459 INFO L82 PathProgramCache]: Analyzing trace with hash 852152367, now seen corresponding path program 1 times [2020-08-22 16:48:05,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:48:05,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257448931] [2020-08-22 16:48:05,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:48:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:05,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:48:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:48:05,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257448931] [2020-08-22 16:48:05,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:48:05,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 16:48:05,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216782007] [2020-08-22 16:48:05,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:48:05,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:48:05,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:48:05,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:48:05,556 INFO L87 Difference]: Start difference. First operand 66 states and 91 transitions. Second operand 6 states. [2020-08-22 16:48:05,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:48:05,798 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-08-22 16:48:05,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:48:05,799 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-22 16:48:05,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:48:05,800 INFO L225 Difference]: With dead ends: 84 [2020-08-22 16:48:05,801 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 16:48:05,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:48:05,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 16:48:05,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2020-08-22 16:48:05,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 16:48:05,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2020-08-22 16:48:05,818 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 33 [2020-08-22 16:48:05,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:48:05,819 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 88 transitions. [2020-08-22 16:48:05,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:48:05,819 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 88 transitions. [2020-08-22 16:48:05,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 16:48:05,823 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:48:05,823 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:48:05,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 16:48:05,824 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:48:05,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:48:05,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1876855343, now seen corresponding path program 1 times [2020-08-22 16:48:05,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:48:05,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505634643] [2020-08-22 16:48:05,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:48:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:05,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:48:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:48:05,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505634643] [2020-08-22 16:48:05,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:48:05,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 16:48:05,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395955444] [2020-08-22 16:48:05,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:48:05,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:48:05,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:48:05,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:48:05,939 INFO L87 Difference]: Start difference. First operand 64 states and 88 transitions. Second operand 6 states. [2020-08-22 16:48:06,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:48:06,126 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-08-22 16:48:06,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:48:06,127 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-22 16:48:06,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:48:06,128 INFO L225 Difference]: With dead ends: 84 [2020-08-22 16:48:06,128 INFO L226 Difference]: Without dead ends: 73 [2020-08-22 16:48:06,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:48:06,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-22 16:48:06,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2020-08-22 16:48:06,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 16:48:06,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 84 transitions. [2020-08-22 16:48:06,148 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 84 transitions. Word has length 33 [2020-08-22 16:48:06,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:48:06,149 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 84 transitions. [2020-08-22 16:48:06,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:48:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 84 transitions. [2020-08-22 16:48:06,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-22 16:48:06,154 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:48:06,154 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:48:06,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 16:48:06,154 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:48:06,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:48:06,155 INFO L82 PathProgramCache]: Analyzing trace with hash -778946181, now seen corresponding path program 1 times [2020-08-22 16:48:06,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:48:06,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068200798] [2020-08-22 16:48:06,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:48:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:06,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:48:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:48:06,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068200798] [2020-08-22 16:48:06,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799299164] [2020-08-22 16:48:06,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:48:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:06,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 28 conjunts are in the unsatisfiable core [2020-08-22 16:48:06,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:48:06,568 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-08-22 16:48:06,569 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:06,573 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:06,574 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:06,574 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-08-22 16:48:06,604 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:06,605 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-08-22 16:48:06,606 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:06,614 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:06,619 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-08-22 16:48:06,620 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:06,628 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:06,628 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:06,629 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:28, output treesize:18 [2020-08-22 16:48:06,648 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-08-22 16:48:06,649 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 27 treesize of output 11 [2020-08-22 16:48:06,650 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:06,655 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:06,655 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:06,656 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:12 [2020-08-22 16:48:06,674 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-08-22 16:48:06,675 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:06,682 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:06,685 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-08-22 16:48:06,685 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:19 [2020-08-22 16:48:06,732 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 22 treesize of output 10 [2020-08-22 16:48:06,733 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:06,738 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:06,741 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:06,742 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:26, output treesize:3 [2020-08-22 16:48:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:48:06,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:48:06,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-08-22 16:48:06,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267563888] [2020-08-22 16:48:06,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:48:06,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:48:06,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:48:06,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:48:06,749 INFO L87 Difference]: Start difference. First operand 61 states and 84 transitions. Second operand 10 states. [2020-08-22 16:48:07,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:48:07,193 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-08-22 16:48:07,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 16:48:07,194 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-08-22 16:48:07,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:48:07,195 INFO L225 Difference]: With dead ends: 86 [2020-08-22 16:48:07,195 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 16:48:07,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:48:07,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 16:48:07,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2020-08-22 16:48:07,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-08-22 16:48:07,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 92 transitions. [2020-08-22 16:48:07,211 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 92 transitions. Word has length 35 [2020-08-22 16:48:07,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:48:07,211 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 92 transitions. [2020-08-22 16:48:07,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:48:07,211 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 92 transitions. [2020-08-22 16:48:07,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-22 16:48:07,217 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:48:07,217 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:48:07,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-08-22 16:48:07,419 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:48:07,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:48:07,420 INFO L82 PathProgramCache]: Analyzing trace with hash 84455483, now seen corresponding path program 1 times [2020-08-22 16:48:07,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:48:07,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756980760] [2020-08-22 16:48:07,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:48:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:07,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:48:07,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:48:07,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756980760] [2020-08-22 16:48:07,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512578142] [2020-08-22 16:48:07,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:48:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:07,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 28 conjunts are in the unsatisfiable core [2020-08-22 16:48:07,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:48:07,667 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-08-22 16:48:07,667 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:07,669 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:07,669 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:07,669 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-08-22 16:48:07,690 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:07,690 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-08-22 16:48:07,691 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:07,699 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:07,703 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-08-22 16:48:07,703 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:07,710 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:07,711 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:07,711 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:28, output treesize:18 [2020-08-22 16:48:07,727 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-08-22 16:48:07,727 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 27 treesize of output 11 [2020-08-22 16:48:07,728 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:07,732 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:07,733 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:07,733 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:12 [2020-08-22 16:48:07,745 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-08-22 16:48:07,746 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:07,752 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:07,754 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-08-22 16:48:07,755 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:19 [2020-08-22 16:48:07,795 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 22 treesize of output 10 [2020-08-22 16:48:07,796 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:07,800 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:07,802 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:07,802 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:26, output treesize:3 [2020-08-22 16:48:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:48:07,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:48:07,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-08-22 16:48:07,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239112208] [2020-08-22 16:48:07,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:48:07,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:48:07,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:48:07,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:48:07,808 INFO L87 Difference]: Start difference. First operand 68 states and 92 transitions. Second operand 10 states. [2020-08-22 16:48:08,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:48:08,223 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2020-08-22 16:48:08,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 16:48:08,223 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-08-22 16:48:08,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:48:08,225 INFO L225 Difference]: With dead ends: 95 [2020-08-22 16:48:08,225 INFO L226 Difference]: Without dead ends: 91 [2020-08-22 16:48:08,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:48:08,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-22 16:48:08,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2020-08-22 16:48:08,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 16:48:08,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 106 transitions. [2020-08-22 16:48:08,233 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 106 transitions. Word has length 35 [2020-08-22 16:48:08,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:48:08,233 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 106 transitions. [2020-08-22 16:48:08,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:48:08,234 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 106 transitions. [2020-08-22 16:48:08,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 16:48:08,235 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:48:08,235 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:48:08,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:48:08,443 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:48:08,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:48:08,443 INFO L82 PathProgramCache]: Analyzing trace with hash -169587242, now seen corresponding path program 1 times [2020-08-22 16:48:08,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:48:08,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171503936] [2020-08-22 16:48:08,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:48:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:08,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:48:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:48:08,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171503936] [2020-08-22 16:48:08,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402783726] [2020-08-22 16:48:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:48:08,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:08,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 35 conjunts are in the unsatisfiable core [2020-08-22 16:48:08,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:48:08,770 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-08-22 16:48:08,770 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:08,776 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:08,777 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:08,777 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-08-22 16:48:08,812 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:08,813 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-08-22 16:48:08,814 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:08,819 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:08,819 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:08,820 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:11 [2020-08-22 16:48:08,846 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 13 treesize of output 9 [2020-08-22 16:48:08,847 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:08,857 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:08,860 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 13 treesize of output 9 [2020-08-22 16:48:08,861 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:08,868 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:08,875 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:08,876 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:49, output treesize:29 [2020-08-22 16:48:08,906 INFO L441 ElimStorePlain]: Different costs {0=[|v_#memory_int_42|], 2=[|v_#memory_$Pointer$.offset_43|, |v_#memory_$Pointer$.base_45|]} [2020-08-22 16:48:08,916 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 29 treesize of output 19 [2020-08-22 16:48:08,916 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:08,928 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:08,933 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 82 [2020-08-22 16:48:08,934 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:08,942 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:08,963 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:08,964 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 105 [2020-08-22 16:48:08,967 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 3, 2, 1] term [2020-08-22 16:48:08,968 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-08-22 16:48:08,969 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:08,979 INFO L625 ElimStorePlain]: treesize reduction 48, result has 38.5 percent of original size [2020-08-22 16:48:08,980 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:08,980 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:130, output treesize:30 [2020-08-22 16:48:09,007 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 39 treesize of output 21 [2020-08-22 16:48:09,008 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:09,014 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:09,017 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2020-08-22 16:48:09,017 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:09,022 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:09,023 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:09,023 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:48, output treesize:7 [2020-08-22 16:48:09,028 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 [2020-08-22 16:48:09,029 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:09,030 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:09,031 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:09,031 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-08-22 16:48:09,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:48:09,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:48:09,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-08-22 16:48:09,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151240085] [2020-08-22 16:48:09,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 16:48:09,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:48:09,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 16:48:09,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-08-22 16:48:09,036 INFO L87 Difference]: Start difference. First operand 79 states and 106 transitions. Second operand 15 states. [2020-08-22 16:48:09,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:48:09,601 INFO L93 Difference]: Finished difference Result 99 states and 128 transitions. [2020-08-22 16:48:09,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 16:48:09,602 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-08-22 16:48:09,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:48:09,603 INFO L225 Difference]: With dead ends: 99 [2020-08-22 16:48:09,603 INFO L226 Difference]: Without dead ends: 95 [2020-08-22 16:48:09,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:48:09,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-22 16:48:09,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2020-08-22 16:48:09,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 16:48:09,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2020-08-22 16:48:09,611 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 37 [2020-08-22 16:48:09,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:48:09,612 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2020-08-22 16:48:09,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 16:48:09,612 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2020-08-22 16:48:09,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-22 16:48:09,613 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:48:09,613 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:48:09,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:48:09,828 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:48:09,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:48:09,828 INFO L82 PathProgramCache]: Analyzing trace with hash 284097905, now seen corresponding path program 1 times [2020-08-22 16:48:09,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:48:09,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375760633] [2020-08-22 16:48:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:48:09,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:10,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:48:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:48:10,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375760633] [2020-08-22 16:48:10,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157919977] [2020-08-22 16:48:10,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:48:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:10,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 34 conjunts are in the unsatisfiable core [2020-08-22 16:48:10,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:48:10,180 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-08-22 16:48:10,180 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:10,182 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:10,182 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:10,182 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-08-22 16:48:10,220 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:10,221 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-08-22 16:48:10,221 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:10,227 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:10,227 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:10,228 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:11 [2020-08-22 16:48:10,258 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 13 treesize of output 9 [2020-08-22 16:48:10,258 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:10,276 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:10,282 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 13 treesize of output 9 [2020-08-22 16:48:10,283 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:10,293 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:10,294 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:10,295 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:49, output treesize:29 [2020-08-22 16:48:10,322 INFO L441 ElimStorePlain]: Different costs {0=[|v_#memory_int_43|], 2=[|v_#memory_$Pointer$.offset_45|, |v_#memory_$Pointer$.base_47|]} [2020-08-22 16:48:10,327 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 29 treesize of output 19 [2020-08-22 16:48:10,327 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:10,339 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:10,342 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 82 [2020-08-22 16:48:10,343 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:10,352 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:10,373 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:10,374 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 105 [2020-08-22 16:48:10,376 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 3, 2, 1] term [2020-08-22 16:48:10,376 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-08-22 16:48:10,377 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:10,389 INFO L625 ElimStorePlain]: treesize reduction 48, result has 38.5 percent of original size [2020-08-22 16:48:10,390 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:10,390 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:130, output treesize:30 [2020-08-22 16:48:10,417 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 39 treesize of output 21 [2020-08-22 16:48:10,418 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:10,424 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:10,426 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2020-08-22 16:48:10,427 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:10,431 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:10,433 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:10,433 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:48, output treesize:7 [2020-08-22 16:48:10,438 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 [2020-08-22 16:48:10,439 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:10,441 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:10,441 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:10,441 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-08-22 16:48:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:48:10,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:48:10,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2020-08-22 16:48:10,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103294940] [2020-08-22 16:48:10,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 16:48:10,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:48:10,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 16:48:10,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:48:10,463 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand 16 states. [2020-08-22 16:48:11,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:48:11,040 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2020-08-22 16:48:11,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 16:48:11,040 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-08-22 16:48:11,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:48:11,042 INFO L225 Difference]: With dead ends: 101 [2020-08-22 16:48:11,042 INFO L226 Difference]: Without dead ends: 91 [2020-08-22 16:48:11,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-08-22 16:48:11,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-22 16:48:11,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 74. [2020-08-22 16:48:11,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-22 16:48:11,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2020-08-22 16:48:11,049 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 39 [2020-08-22 16:48:11,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:48:11,049 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2020-08-22 16:48:11,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 16:48:11,049 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2020-08-22 16:48:11,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-22 16:48:11,050 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:48:11,050 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:48:11,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:48:11,264 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:48:11,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:48:11,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1308800881, now seen corresponding path program 2 times [2020-08-22 16:48:11,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:48:11,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481223207] [2020-08-22 16:48:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:48:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:11,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:48:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:11,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:48:11,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481223207] [2020-08-22 16:48:11,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709705174] [2020-08-22 16:48:11,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:48:11,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:48:11,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:48:11,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 36 conjunts are in the unsatisfiable core [2020-08-22 16:48:11,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:48:11,570 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-08-22 16:48:11,570 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:11,574 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:11,574 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:11,575 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-08-22 16:48:11,592 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:11,593 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-08-22 16:48:11,593 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:11,601 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:11,602 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:11,602 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2020-08-22 16:48:11,614 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-08-22 16:48:11,614 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:11,625 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:11,630 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-08-22 16:48:11,630 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:11,643 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:11,644 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:11,644 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:26 [2020-08-22 16:48:11,664 INFO L441 ElimStorePlain]: Different costs {0=[|v_#memory_int_44|], 2=[|v_#memory_$Pointer$.base_49|, |v_#memory_$Pointer$.offset_47|]} [2020-08-22 16:48:11,675 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 23 treesize of output 15 [2020-08-22 16:48:11,675 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:11,688 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:11,708 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:11,708 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 108 [2020-08-22 16:48:11,711 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 3, 2, 1] term [2020-08-22 16:48:11,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-08-22 16:48:11,712 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:11,731 INFO L625 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2020-08-22 16:48:11,735 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2020-08-22 16:48:11,736 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:11,743 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:11,744 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:11,744 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:105, output treesize:27 [2020-08-22 16:48:11,780 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 31 treesize of output 19 [2020-08-22 16:48:11,781 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:11,788 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:11,790 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2020-08-22 16:48:11,791 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:11,794 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:11,795 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:11,795 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:7 [2020-08-22 16:48:11,803 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 [2020-08-22 16:48:11,804 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:11,805 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:11,805 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:11,806 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-08-22 16:48:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:48:11,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:48:11,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2020-08-22 16:48:11,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039206272] [2020-08-22 16:48:11,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 16:48:11,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:48:11,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 16:48:11,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:48:11,827 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand 12 states. [2020-08-22 16:48:12,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:48:12,216 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2020-08-22 16:48:12,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 16:48:12,217 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-08-22 16:48:12,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:48:12,218 INFO L225 Difference]: With dead ends: 94 [2020-08-22 16:48:12,219 INFO L226 Difference]: Without dead ends: 81 [2020-08-22 16:48:12,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-08-22 16:48:12,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-22 16:48:12,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2020-08-22 16:48:12,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 16:48:12,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2020-08-22 16:48:12,224 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 39 [2020-08-22 16:48:12,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:48:12,225 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2020-08-22 16:48:12,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 16:48:12,225 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2020-08-22 16:48:12,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-22 16:48:12,226 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:48:12,226 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:48:12,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-08-22 16:48:12,436 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:48:12,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:48:12,436 INFO L82 PathProgramCache]: Analyzing trace with hash -315248798, now seen corresponding path program 2 times [2020-08-22 16:48:12,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:48:12,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918240502] [2020-08-22 16:48:12,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:48:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:12,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:48:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:48:12,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918240502] [2020-08-22 16:48:12,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647041897] [2020-08-22 16:48:12,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:48:12,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:48:12,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:48:12,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 40 conjunts are in the unsatisfiable core [2020-08-22 16:48:12,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:48:12,799 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-08-22 16:48:12,800 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:12,806 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:12,806 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:12,806 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-08-22 16:48:12,837 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:12,837 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 [2020-08-22 16:48:12,838 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:12,865 INFO L625 ElimStorePlain]: treesize reduction 14, result has 71.4 percent of original size [2020-08-22 16:48:12,868 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-08-22 16:48:12,868 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:12,880 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:12,881 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:12,881 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:31 [2020-08-22 16:48:12,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:48:12,917 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 27 treesize of output 11 [2020-08-22 16:48:12,917 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:12,925 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:12,926 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:12,926 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:25 [2020-08-22 16:48:12,978 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:12,979 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 [2020-08-22 16:48:12,980 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:12,996 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:13,001 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-08-22 16:48:13,002 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:13,012 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:13,013 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:13,013 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:30 [2020-08-22 16:48:13,059 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-08-22 16:48:13,060 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2020-08-22 16:48:13,060 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:13,069 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:13,072 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-08-22 16:48:13,072 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:30 [2020-08-22 16:48:13,152 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2020-08-22 16:48:13,153 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:13,164 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:13,168 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-08-22 16:48:13,169 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:37 [2020-08-22 16:48:13,242 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 29 treesize of output 13 [2020-08-22 16:48:13,244 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:13,252 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:13,254 INFO L545 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:13,254 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:41, output treesize:3 [2020-08-22 16:48:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:48:13,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:48:13,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2020-08-22 16:48:13,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803927510] [2020-08-22 16:48:13,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 16:48:13,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:48:13,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 16:48:13,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-08-22 16:48:13,288 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand 19 states. [2020-08-22 16:48:14,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:48:14,119 INFO L93 Difference]: Finished difference Result 105 states and 135 transitions. [2020-08-22 16:48:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 16:48:14,120 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2020-08-22 16:48:14,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:48:14,121 INFO L225 Difference]: With dead ends: 105 [2020-08-22 16:48:14,121 INFO L226 Difference]: Without dead ends: 97 [2020-08-22 16:48:14,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2020-08-22 16:48:14,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-08-22 16:48:14,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2020-08-22 16:48:14,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 16:48:14,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 114 transitions. [2020-08-22 16:48:14,127 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 114 transitions. Word has length 39 [2020-08-22 16:48:14,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:48:14,127 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 114 transitions. [2020-08-22 16:48:14,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 16:48:14,128 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 114 transitions. [2020-08-22 16:48:14,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-22 16:48:14,128 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:48:14,129 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:48:14,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:48:14,336 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:48:14,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:48:14,336 INFO L82 PathProgramCache]: Analyzing trace with hash -15546846, now seen corresponding path program 1 times [2020-08-22 16:48:14,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:48:14,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006237425] [2020-08-22 16:48:14,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:48:14,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:14,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:48:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:48:14,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006237425] [2020-08-22 16:48:14,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945736795] [2020-08-22 16:48:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:48:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:14,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 38 conjunts are in the unsatisfiable core [2020-08-22 16:48:14,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:48:14,639 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-08-22 16:48:14,639 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:14,641 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:14,641 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:14,641 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-08-22 16:48:14,694 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:14,694 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 [2020-08-22 16:48:14,695 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:14,724 INFO L625 ElimStorePlain]: treesize reduction 14, result has 69.6 percent of original size [2020-08-22 16:48:14,729 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-08-22 16:48:14,729 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:14,743 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:14,743 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:14,744 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:28 [2020-08-22 16:48:14,792 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-08-22 16:48:14,792 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 27 treesize of output 11 [2020-08-22 16:48:14,793 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:14,800 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:14,801 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:14,801 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2020-08-22 16:48:14,845 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:14,845 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 [2020-08-22 16:48:14,846 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:14,858 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:14,863 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-08-22 16:48:14,864 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:14,875 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:14,876 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:14,876 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:38, output treesize:27 [2020-08-22 16:48:14,925 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-08-22 16:48:14,926 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2020-08-22 16:48:14,927 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:14,937 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:14,939 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-08-22 16:48:14,940 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:27 [2020-08-22 16:48:14,994 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2020-08-22 16:48:14,995 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:15,009 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:15,013 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-08-22 16:48:15,013 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:38, output treesize:34 [2020-08-22 16:48:15,092 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 29 treesize of output 13 [2020-08-22 16:48:15,093 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:15,100 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:15,102 INFO L545 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:15,102 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:41, output treesize:3 [2020-08-22 16:48:15,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:48:15,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:48:15,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2020-08-22 16:48:15,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465044189] [2020-08-22 16:48:15,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 16:48:15,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:48:15,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 16:48:15,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-08-22 16:48:15,127 INFO L87 Difference]: Start difference. First operand 87 states and 114 transitions. Second operand 21 states. [2020-08-22 16:48:16,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:48:16,210 INFO L93 Difference]: Finished difference Result 125 states and 159 transitions. [2020-08-22 16:48:16,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 16:48:16,210 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2020-08-22 16:48:16,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:48:16,211 INFO L225 Difference]: With dead ends: 125 [2020-08-22 16:48:16,211 INFO L226 Difference]: Without dead ends: 119 [2020-08-22 16:48:16,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 16:48:16,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-08-22 16:48:16,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 95. [2020-08-22 16:48:16,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-22 16:48:16,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 124 transitions. [2020-08-22 16:48:16,218 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 124 transitions. Word has length 39 [2020-08-22 16:48:16,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:48:16,219 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 124 transitions. [2020-08-22 16:48:16,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 16:48:16,219 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 124 transitions. [2020-08-22 16:48:16,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 16:48:16,220 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:48:16,220 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:48:16,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:48:16,434 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:48:16,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:48:16,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1233000963, now seen corresponding path program 3 times [2020-08-22 16:48:16,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:48:16,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269117559] [2020-08-22 16:48:16,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:48:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:16,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:48:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:48:16,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269117559] [2020-08-22 16:48:16,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104298342] [2020-08-22 16:48:16,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:48:16,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-08-22 16:48:16,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:48:16,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 54 conjunts are in the unsatisfiable core [2020-08-22 16:48:16,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:48:16,905 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-08-22 16:48:16,905 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:16,908 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:16,908 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:16,909 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-08-22 16:48:16,930 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:16,930 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 [2020-08-22 16:48:16,932 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:48:16,935 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:16,965 INFO L625 ElimStorePlain]: treesize reduction 14, result has 63.2 percent of original size [2020-08-22 16:48:16,965 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:16,965 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2020-08-22 16:48:17,009 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-08-22 16:48:17,009 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:17,025 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:17,040 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-08-22 16:48:17,040 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:17,053 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:17,054 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:17,055 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:40 [2020-08-22 16:48:17,113 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:17,114 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 20 treesize of output 30 [2020-08-22 16:48:17,115 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-08-22 16:48:17,116 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:48:17,117 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:17,138 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:17,140 INFO L441 ElimStorePlain]: Different costs {0=[|v_#memory_int_55|], 2=[|v_#memory_$Pointer$.base_55|, |v_#memory_$Pointer$.offset_49|]} [2020-08-22 16:48:17,150 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-08-22 16:48:17,150 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:17,171 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:17,194 INFO L350 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2020-08-22 16:48:17,195 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 39 treesize of output 27 [2020-08-22 16:48:17,195 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:17,239 INFO L625 ElimStorePlain]: treesize reduction 8, result has 87.3 percent of original size [2020-08-22 16:48:17,246 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2020-08-22 16:48:17,247 INFO L545 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:17,261 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:17,261 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:17,262 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:89, output treesize:40 [2020-08-22 16:48:17,316 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 113 [2020-08-22 16:48:17,317 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:17,341 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:17,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:48:17,346 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 19 [2020-08-22 16:48:17,347 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:17,365 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:17,385 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:17,386 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 118 [2020-08-22 16:48:17,388 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[9, 3, 2, 1] term [2020-08-22 16:48:17,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-08-22 16:48:17,389 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:17,433 INFO L625 ElimStorePlain]: treesize reduction 26, result has 80.5 percent of original size [2020-08-22 16:48:17,434 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:17,434 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:162, output treesize:118 [2020-08-22 16:48:17,491 INFO L441 ElimStorePlain]: Different costs {2=[|v_#memory_int_57|], 6=[|v_#memory_$Pointer$.offset_51|, |v_#memory_$Pointer$.base_57|]} [2020-08-22 16:48:17,497 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 54 [2020-08-22 16:48:17,497 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:17,520 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:17,574 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:17,574 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 278 treesize of output 257 [2020-08-22 16:48:17,576 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:17,614 INFO L625 ElimStorePlain]: treesize reduction 100, result has 61.8 percent of original size [2020-08-22 16:48:17,641 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:17,642 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 159 treesize of output 145 [2020-08-22 16:48:17,644 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 3, 2, 1] term [2020-08-22 16:48:17,644 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-08-22 16:48:17,645 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:17,676 INFO L625 ElimStorePlain]: treesize reduction 108, result has 49.3 percent of original size [2020-08-22 16:48:17,677 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:17,677 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:307, output treesize:105 [2020-08-22 16:48:17,785 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:17,785 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 68 [2020-08-22 16:48:17,788 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-08-22 16:48:17,789 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-08-22 16:48:17,790 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-08-22 16:48:17,823 INFO L625 ElimStorePlain]: treesize reduction 22, result has 71.1 percent of original size [2020-08-22 16:48:17,826 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 19 [2020-08-22 16:48:17,827 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:17,834 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:17,835 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-08-22 16:48:17,836 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:30 [2020-08-22 16:48:17,900 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:17,901 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2020-08-22 16:48:17,902 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:48:17,903 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:17,911 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:17,912 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:17,913 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:37, output treesize:3 [2020-08-22 16:48:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:48:17,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:48:17,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2020-08-22 16:48:17,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005336268] [2020-08-22 16:48:17,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 16:48:17,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:48:17,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 16:48:17,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:48:17,930 INFO L87 Difference]: Start difference. First operand 95 states and 124 transitions. Second operand 20 states. [2020-08-22 16:48:19,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:48:19,031 INFO L93 Difference]: Finished difference Result 122 states and 154 transitions. [2020-08-22 16:48:19,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 16:48:19,032 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-08-22 16:48:19,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:48:19,033 INFO L225 Difference]: With dead ends: 122 [2020-08-22 16:48:19,034 INFO L226 Difference]: Without dead ends: 116 [2020-08-22 16:48:19,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2020-08-22 16:48:19,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-22 16:48:19,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 100. [2020-08-22 16:48:19,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-22 16:48:19,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 130 transitions. [2020-08-22 16:48:19,041 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 130 transitions. Word has length 41 [2020-08-22 16:48:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:48:19,042 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 130 transitions. [2020-08-22 16:48:19,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 16:48:19,042 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 130 transitions. [2020-08-22 16:48:19,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 16:48:19,042 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:48:19,043 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:48:19,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-08-22 16:48:19,254 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:48:19,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:48:19,254 INFO L82 PathProgramCache]: Analyzing trace with hash -2006936899, now seen corresponding path program 1 times [2020-08-22 16:48:19,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:48:19,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896543299] [2020-08-22 16:48:19,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:48:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:48:19,272 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:48:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:48:19,301 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:48:19,340 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:48:19,341 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:48:19,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 16:48:19,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:48:19 BoogieIcfgContainer [2020-08-22 16:48:19,405 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:48:19,407 INFO L168 Benchmark]: Toolchain (without parser) took 17078.15 ms. Allocated memory was 145.2 MB in the beginning and 390.1 MB in the end (delta: 244.8 MB). Free memory was 99.9 MB in the beginning and 143.9 MB in the end (delta: -44.0 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. [2020-08-22 16:48:19,407 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 119.9 MB in the beginning and 119.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 16:48:19,408 INFO L168 Benchmark]: CACSL2BoogieTranslator took 641.65 ms. Allocated memory was 145.2 MB in the beginning and 199.2 MB in the end (delta: 54.0 MB). Free memory was 99.7 MB in the beginning and 164.4 MB in the end (delta: -64.7 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. [2020-08-22 16:48:19,408 INFO L168 Benchmark]: Boogie Preprocessor took 78.49 ms. Allocated memory is still 199.2 MB. Free memory was 164.4 MB in the beginning and 161.1 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-08-22 16:48:19,408 INFO L168 Benchmark]: RCFGBuilder took 813.52 ms. Allocated memory is still 199.2 MB. Free memory was 161.1 MB in the beginning and 104.1 MB in the end (delta: 57.0 MB). Peak memory consumption was 57.0 MB. Max. memory is 7.1 GB. [2020-08-22 16:48:19,409 INFO L168 Benchmark]: TraceAbstraction took 15537.33 ms. Allocated memory was 199.2 MB in the beginning and 390.1 MB in the end (delta: 190.8 MB). Free memory was 103.4 MB in the beginning and 143.9 MB in the end (delta: -40.5 MB). Peak memory consumption was 150.3 MB. Max. memory is 7.1 GB. [2020-08-22 16:48:19,410 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 119.9 MB in the beginning and 119.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 641.65 ms. Allocated memory was 145.2 MB in the beginning and 199.2 MB in the end (delta: 54.0 MB). Free memory was 99.7 MB in the beginning and 164.4 MB in the end (delta: -64.7 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 78.49 ms. Allocated memory is still 199.2 MB. Free memory was 164.4 MB in the beginning and 161.1 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 813.52 ms. Allocated memory is still 199.2 MB. Free memory was 161.1 MB in the beginning and 104.1 MB in the end (delta: 57.0 MB). Peak memory consumption was 57.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15537.33 ms. Allocated memory was 199.2 MB in the beginning and 390.1 MB in the end (delta: 190.8 MB). Free memory was 103.4 MB in the beginning and 143.9 MB in the end (delta: -40.5 MB). Peak memory consumption was 150.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 609]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L541] struct TreeNode* root = malloc(sizeof(*root)), *n; [L542] root->left = ((void *)0) [L543] root->right = ((void *)0) VAL [malloc(sizeof(*root))={-1:0}, root={-1:0}] [L544] COND FALSE !(__VERIFIER_nondet_int()) [L563] n = ((void *)0) [L564] struct TreeNode* pred; VAL [malloc(sizeof(*root))={-1:0}, n={0:0}, root={-1:0}] [L565] COND TRUE \read(*root) [L566] pred = ((void *)0) [L567] n = root VAL [malloc(sizeof(*root))={-1:0}, n={-1:0}, pred={0:0}, root={-1:0}] [L568] EXPR n->left [L568] n->left || n->right [L568] EXPR n->right [L568] n->left || n->right VAL [malloc(sizeof(*root))={-1:0}, n={-1:0}, n->left={0:0}, n->left || n->right=0, n->right={0:0}, pred={0:0}, root={-1:0}] [L568] COND FALSE !(n->left || n->right) [L575] COND FALSE !(\read(*pred)) [L581] root = ((void *)0) VAL [malloc(sizeof(*root))={-1:0}, n={-1:0}, pred={0:0}, root={0:0}] [L565] COND FALSE !(\read(*root)) VAL [malloc(sizeof(*root))={-1:0}, n={-1:0}, pred={0:0}, root={0:0}] [L584] List a = (List) malloc(sizeof(struct node)); VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, pred={0:0}, root={0:0}] [L585] COND FALSE !(a == 0) VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, pred={0:0}, root={0:0}] [L586] List t; [L587] List p = a; VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-2:0}, pred={0:0}, root={0:0}] [L588] COND TRUE __VERIFIER_nondet_int() [L589] p->h = 1 [L590] t = (List) malloc(sizeof(struct node)) VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, n={-1:0}, p={-2:0}, pred={0:0}, root={0:0}, t={-3:0}] [L591] COND FALSE !(t == 0) VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, n={-1:0}, p={-2:0}, pred={0:0}, root={0:0}, t={-3:0}] [L592] p->n = t [L593] EXPR p->n [L593] p = p->n [L588] COND FALSE !(__VERIFIER_nondet_int()) [L595] COND TRUE __VERIFIER_nondet_int() [L596] p->h = 2 [L597] t = (List) malloc(sizeof(struct node)) VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-3:0}, pred={0:0}, root={0:0}, t={-4:0}] [L598] COND FALSE !(t == 0) VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-3:0}, pred={0:0}, root={0:0}, t={-4:0}] [L599] p->n = t [L600] EXPR p->n [L600] p = p->n [L595] COND FALSE !(__VERIFIER_nondet_int()) [L602] p->h = 3 [L603] p = a VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-2:0}, pred={0:0}, root={0:0}, t={-4:0}] [L604] EXPR p->h VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-2:0}, p->h=1, pred={0:0}, root={0:0}, t={-4:0}] [L604] COND FALSE !(p->h == 2) [L606] EXPR p->h VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-2:0}, p->h=1, pred={0:0}, root={0:0}, t={-4:0}] [L606] COND TRUE p->h == 1 [L607] EXPR p->n [L607] p = p->n [L606] EXPR p->h VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-3:0}, p->h=2, pred={0:0}, root={0:0}, t={-4:0}] [L606] COND FALSE !(p->h == 1) [L608] EXPR p->h VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-3:0}, p->h=2, pred={0:0}, root={0:0}, t={-4:0}] [L608] COND TRUE p->h != 3 [L609] __VERIFIER_error() VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-3:0}, pred={0:0}, root={0:0}, t={-4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 15.3s, OverallIterations: 15, TraceHistogramMax: 3, AutomataDifference: 6.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 803 SDtfs, 629 SDslu, 4292 SDs, 0 SdLazy, 3646 SolverSat, 264 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 498 GetRequests, 300 SyntacticMatches, 6 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 151 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 822 NumberOfCodeBlocks, 822 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 759 ConstructedInterpolants, 15 QuantifiedInterpolants, 208514 SizeOfPredicates, 117 NumberOfNonLiveVariables, 1390 ConjunctsInSsa, 293 ConjunctsInUnsatCore, 22 InterpolantComputations, 6 PerfectInterpolantSequences, 36/112 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...