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-simple/dll2n_prepend_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:13:03,658 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:13:03,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:13:03,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:13:03,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:13:03,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:13:03,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:13:03,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:13:03,683 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:13:03,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:13:03,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:13:03,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:13:03,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:13:03,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:13:03,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:13:03,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:13:03,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:13:03,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:13:03,693 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:13:03,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:13:03,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:13:03,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:13:03,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:13:03,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:13:03,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 19:13:03,704 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 19:13:03,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 19:13:03,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 19:13:03,705 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 19:13:03,706 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 19:13:03,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:13:03,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:13:03,708 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:13:03,709 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:13:03,710 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:13:03,710 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:13:03,711 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:13:03,711 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:13:03,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:13:03,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:13:03,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:13:03,716 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 [2019-10-13 19:13:03,737 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:13:03,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:13:03,739 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:13:03,739 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:13:03,739 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:13:03,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:13:03,740 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:13:03,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:13:03,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:13:03,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:13:03,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:13:03,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:13:03,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:13:03,741 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:13:03,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:13:03,742 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:13:03,742 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:13:03,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:13:03,742 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:13:03,742 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:13:03,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:13:03,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:13:03,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:13:03,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:13:03,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:13:03,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:13:03,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:13:03,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:13:03,744 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:13:04,033 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:13:04,049 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:13:04,053 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:13:04,055 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:13:04,055 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:13:04,056 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_prepend_equal.i [2019-10-13 19:13:04,127 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a85cdbb0b/8dee3f83788e4e6a88ba151dcd2e7529/FLAG6298f02de [2019-10-13 19:13:04,683 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:13:04,683 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2n_prepend_equal.i [2019-10-13 19:13:04,705 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a85cdbb0b/8dee3f83788e4e6a88ba151dcd2e7529/FLAG6298f02de [2019-10-13 19:13:04,928 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a85cdbb0b/8dee3f83788e4e6a88ba151dcd2e7529 [2019-10-13 19:13:04,938 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:13:04,940 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:13:04,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:13:04,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:13:04,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:13:04,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:13:04" (1/1) ... [2019-10-13 19:13:04,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4796d6a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:04, skipping insertion in model container [2019-10-13 19:13:04,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:13:04" (1/1) ... [2019-10-13 19:13:04,956 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:13:04,999 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:13:05,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:13:05,425 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:13:05,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:13:05,530 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:13:05,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:05 WrapperNode [2019-10-13 19:13:05,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:13:05,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:13:05,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:13:05,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:13:05,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:05" (1/1) ... [2019-10-13 19:13:05,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:05" (1/1) ... [2019-10-13 19:13:05,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:05" (1/1) ... [2019-10-13 19:13:05,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:05" (1/1) ... [2019-10-13 19:13:05,583 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:05" (1/1) ... [2019-10-13 19:13:05,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:05" (1/1) ... [2019-10-13 19:13:05,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:05" (1/1) ... [2019-10-13 19:13:05,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:13:05,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:13:05,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:13:05,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:13:05,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:05" (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 [2019-10-13 19:13:05,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:13:05,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:13:05,674 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-13 19:13:05,674 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-13 19:13:05,674 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-13 19:13:05,674 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-10-13 19:13:05,674 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2019-10-13 19:13:05,674 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2019-10-13 19:13:05,675 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_prepend [2019-10-13 19:13:05,675 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:13:05,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:13:05,675 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-13 19:13:05,675 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-13 19:13:05,676 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-13 19:13:05,676 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-13 19:13:05,676 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-13 19:13:05,676 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-13 19:13:05,676 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-13 19:13:05,676 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-13 19:13:05,677 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-13 19:13:05,677 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-13 19:13:05,677 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-13 19:13:05,677 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-13 19:13:05,677 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-13 19:13:05,677 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-13 19:13:05,678 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-13 19:13:05,678 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-13 19:13:05,678 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-13 19:13:05,678 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-13 19:13:05,678 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-13 19:13:05,679 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-13 19:13:05,679 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-13 19:13:05,679 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-13 19:13:05,679 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-13 19:13:05,679 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-13 19:13:05,679 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-13 19:13:05,680 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-13 19:13:05,680 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-13 19:13:05,680 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-13 19:13:05,680 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-13 19:13:05,680 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-13 19:13:05,680 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-13 19:13:05,680 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-13 19:13:05,681 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-13 19:13:05,681 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-13 19:13:05,681 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-13 19:13:05,681 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-13 19:13:05,681 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-13 19:13:05,681 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-13 19:13:05,682 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-13 19:13:05,682 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-13 19:13:05,682 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-13 19:13:05,682 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-13 19:13:05,682 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-13 19:13:05,682 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-13 19:13:05,682 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-13 19:13:05,683 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-13 19:13:05,683 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-13 19:13:05,683 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-13 19:13:05,683 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-13 19:13:05,683 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-13 19:13:05,683 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-13 19:13:05,684 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-13 19:13:05,684 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 19:13:05,684 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-13 19:13:05,684 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-13 19:13:05,684 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 19:13:05,684 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-13 19:13:05,685 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-13 19:13:05,685 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-13 19:13:05,685 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-13 19:13:05,685 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-13 19:13:05,685 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-13 19:13:05,685 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-13 19:13:05,686 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-13 19:13:05,686 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-13 19:13:05,686 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 19:13:05,686 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-13 19:13:05,686 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-13 19:13:05,686 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-13 19:13:05,687 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-13 19:13:05,687 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-13 19:13:05,687 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-13 19:13:05,687 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-13 19:13:05,687 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-13 19:13:05,688 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-13 19:13:05,688 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-13 19:13:05,689 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-13 19:13:05,689 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-13 19:13:05,689 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-13 19:13:05,689 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-13 19:13:05,690 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-13 19:13:05,690 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-13 19:13:05,690 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-13 19:13:05,690 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-13 19:13:05,690 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-13 19:13:05,691 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-13 19:13:05,691 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-13 19:13:05,691 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-13 19:13:05,691 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-13 19:13:05,691 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-13 19:13:05,691 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-13 19:13:05,691 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-13 19:13:05,692 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-13 19:13:05,692 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-13 19:13:05,692 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-13 19:13:05,692 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-13 19:13:05,692 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-13 19:13:05,692 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-13 19:13:05,692 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-13 19:13:05,693 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-13 19:13:05,693 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-13 19:13:05,693 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-13 19:13:05,693 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-13 19:13:05,693 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-13 19:13:05,693 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-13 19:13:05,693 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-13 19:13:05,694 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-10-13 19:13:05,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 19:13:05,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 19:13:05,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 19:13:05,695 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2019-10-13 19:13:05,695 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2019-10-13 19:13:05,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 19:13:05,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 19:13:05,696 INFO L130 BoogieDeclarations]: Found specification of procedure dll_prepend [2019-10-13 19:13:05,696 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:13:05,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 19:13:05,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-13 19:13:05,696 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 19:13:05,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:13:05,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:13:06,135 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-13 19:13:06,325 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:13:06,325 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 19:13:06,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:13:06 BoogieIcfgContainer [2019-10-13 19:13:06,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:13:06,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:13:06,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:13:06,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:13:06,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:13:04" (1/3) ... [2019-10-13 19:13:06,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38183f32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:13:06, skipping insertion in model container [2019-10-13 19:13:06,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:05" (2/3) ... [2019-10-13 19:13:06,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38183f32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:13:06, skipping insertion in model container [2019-10-13 19:13:06,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:13:06" (3/3) ... [2019-10-13 19:13:06,348 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_equal.i [2019-10-13 19:13:06,359 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:13:06,368 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:13:06,381 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:13:06,412 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:13:06,412 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:13:06,412 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:13:06,413 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:13:06,413 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:13:06,413 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:13:06,413 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:13:06,413 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:13:06,440 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2019-10-13 19:13:06,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 19:13:06,449 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:13:06,450 INFO L380 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] [2019-10-13 19:13:06,452 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:13:06,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:13:06,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1196981672, now seen corresponding path program 1 times [2019-10-13 19:13:06,467 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:13:06,468 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375460036] [2019-10-13 19:13:06,468 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:13:06,469 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:13:06,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:13:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:13:06,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375460036] [2019-10-13 19:13:06,847 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:13:06,847 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:13:06,848 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894115595] [2019-10-13 19:13:06,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:13:06,855 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:13:06,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:13:06,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:13:06,877 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 4 states. [2019-10-13 19:13:07,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:13:07,120 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2019-10-13 19:13:07,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:13:07,121 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2019-10-13 19:13:07,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:13:07,133 INFO L225 Difference]: With dead ends: 93 [2019-10-13 19:13:07,133 INFO L226 Difference]: Without dead ends: 40 [2019-10-13 19:13:07,137 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:13:07,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-13 19:13:07,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2019-10-13 19:13:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-13 19:13:07,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-13 19:13:07,183 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 30 [2019-10-13 19:13:07,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:13:07,183 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-13 19:13:07,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:13:07,184 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-13 19:13:07,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 19:13:07,185 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:13:07,185 INFO L380 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] [2019-10-13 19:13:07,186 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:13:07,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:13:07,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1196990321, now seen corresponding path program 1 times [2019-10-13 19:13:07,186 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:13:07,187 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020615286] [2019-10-13 19:13:07,187 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:13:07,187 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:13:07,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:13:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:13:07,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020615286] [2019-10-13 19:13:07,598 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:13:07,598 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-13 19:13:07,599 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572574633] [2019-10-13 19:13:07,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:13:07,601 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:13:07,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:13:07,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:13:07,604 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 12 states. [2019-10-13 19:13:08,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:13:08,003 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-10-13 19:13:08,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 19:13:08,004 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2019-10-13 19:13:08,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:13:08,006 INFO L225 Difference]: With dead ends: 47 [2019-10-13 19:13:08,006 INFO L226 Difference]: Without dead ends: 44 [2019-10-13 19:13:08,008 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2019-10-13 19:13:08,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-13 19:13:08,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2019-10-13 19:13:08,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-13 19:13:08,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2019-10-13 19:13:08,027 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 30 [2019-10-13 19:13:08,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:13:08,028 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2019-10-13 19:13:08,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 19:13:08,028 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2019-10-13 19:13:08,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 19:13:08,030 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:13:08,030 INFO L380 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] [2019-10-13 19:13:08,031 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:13:08,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:13:08,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1196988647, now seen corresponding path program 1 times [2019-10-13 19:13:08,031 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:13:08,032 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124600509] [2019-10-13 19:13:08,032 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:13:08,032 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:13:08,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:13:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:13:08,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124600509] [2019-10-13 19:13:08,188 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:13:08,189 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 19:13:08,189 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60969108] [2019-10-13 19:13:08,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:13:08,190 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:13:08,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:13:08,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:13:08,196 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 7 states. [2019-10-13 19:13:08,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:13:08,399 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-10-13 19:13:08,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:13:08,400 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2019-10-13 19:13:08,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:13:08,401 INFO L225 Difference]: With dead ends: 66 [2019-10-13 19:13:08,401 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 19:13:08,402 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:13:08,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 19:13:08,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2019-10-13 19:13:08,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-13 19:13:08,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-10-13 19:13:08,409 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 30 [2019-10-13 19:13:08,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:13:08,409 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-10-13 19:13:08,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:13:08,409 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-10-13 19:13:08,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-13 19:13:08,411 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:13:08,411 INFO L380 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, 1, 1, 1, 1] [2019-10-13 19:13:08,411 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:13:08,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:13:08,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1608181309, now seen corresponding path program 1 times [2019-10-13 19:13:08,412 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:13:08,412 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65575696] [2019-10-13 19:13:08,412 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:13:08,412 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:13:08,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:13:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:13:08,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65575696] [2019-10-13 19:13:08,515 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:13:08,516 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:13:08,516 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522232229] [2019-10-13 19:13:08,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:13:08,517 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:13:08,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:13:08,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:13:08,517 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 5 states. [2019-10-13 19:13:08,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:13:08,647 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2019-10-13 19:13:08,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:13:08,647 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2019-10-13 19:13:08,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:13:08,648 INFO L225 Difference]: With dead ends: 71 [2019-10-13 19:13:08,648 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 19:13:08,649 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:13:08,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 19:13:08,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-13 19:13:08,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-13 19:13:08,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-10-13 19:13:08,655 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 35 [2019-10-13 19:13:08,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:13:08,656 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-10-13 19:13:08,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:13:08,656 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-10-13 19:13:08,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-13 19:13:08,657 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:13:08,657 INFO L380 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, 1, 1, 1, 1] [2019-10-13 19:13:08,658 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:13:08,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:13:08,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1474167803, now seen corresponding path program 1 times [2019-10-13 19:13:08,658 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:13:08,658 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343431068] [2019-10-13 19:13:08,659 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:13:08,659 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:13:08,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:13:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:08,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:08,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:13:08,823 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343431068] [2019-10-13 19:13:08,823 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540004451] [2019-10-13 19:13:08,824 INFO L94 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 [2019-10-13 19:13:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:08,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 19:13:09,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:13:09,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:13:09,067 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:13:09,068 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2019-10-13 19:13:09,068 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147904584] [2019-10-13 19:13:09,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 19:13:09,071 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:13:09,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 19:13:09,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:13:09,072 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 9 states. [2019-10-13 19:13:09,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:13:09,290 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2019-10-13 19:13:09,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:13:09,290 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2019-10-13 19:13:09,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:13:09,291 INFO L225 Difference]: With dead ends: 71 [2019-10-13 19:13:09,291 INFO L226 Difference]: Without dead ends: 47 [2019-10-13 19:13:09,292 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:13:09,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-13 19:13:09,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2019-10-13 19:13:09,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-13 19:13:09,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-10-13 19:13:09,298 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 35 [2019-10-13 19:13:09,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:13:09,298 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-10-13 19:13:09,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 19:13:09,299 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-10-13 19:13:09,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-13 19:13:09,300 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:13:09,300 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1] [2019-10-13 19:13:09,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:13:09,505 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:13:09,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:13:09,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2012412261, now seen corresponding path program 1 times [2019-10-13 19:13:09,506 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:13:09,506 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678284904] [2019-10-13 19:13:09,506 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:13:09,507 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:13:09,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:13:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:10,184 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2019-10-13 19:13:10,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 19:13:10,522 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678284904] [2019-10-13 19:13:10,523 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:13:10,523 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2019-10-13 19:13:10,523 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960878249] [2019-10-13 19:13:10,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 19:13:10,524 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:13:10,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 19:13:10,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2019-10-13 19:13:10,525 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 20 states. [2019-10-13 19:13:11,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:13:11,575 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2019-10-13 19:13:11,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 19:13:11,576 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 40 [2019-10-13 19:13:11,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:13:11,579 INFO L225 Difference]: With dead ends: 47 [2019-10-13 19:13:11,579 INFO L226 Difference]: Without dead ends: 45 [2019-10-13 19:13:11,580 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2019-10-13 19:13:11,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-13 19:13:11,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-10-13 19:13:11,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-13 19:13:11,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-10-13 19:13:11,586 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 40 [2019-10-13 19:13:11,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:13:11,587 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-10-13 19:13:11,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 19:13:11,587 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-10-13 19:13:11,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 19:13:11,588 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:13:11,588 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-13 19:13:11,589 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:13:11,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:13:11,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1192855508, now seen corresponding path program 1 times [2019-10-13 19:13:11,589 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:13:11,589 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257906250] [2019-10-13 19:13:11,589 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:13:11,590 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:13:11,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:13:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:12,191 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2019-10-13 19:13:12,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 19:13:12,522 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257906250] [2019-10-13 19:13:12,522 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953256423] [2019-10-13 19:13:12,523 INFO L94 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 [2019-10-13 19:13:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:12,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 89 conjunts are in the unsatisfiable core [2019-10-13 19:13:12,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:13:12,737 INFO L375 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 [2019-10-13 19:13:12,737 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:13:12,742 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:13:12,742 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:13:12,743 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-10-13 19:13:12,954 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2019-10-13 19:13:12,955 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:13:12,963 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:13:12,969 INFO L375 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 7 treesize of output 3 [2019-10-13 19:13:12,970 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 19:13:12,977 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:13:12,978 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_$Pointer$.base_BEFORE_CALL_1| vanished before elimination [2019-10-13 19:13:12,978 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:13:12,979 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:29, output treesize:10 [2019-10-13 19:13:13,375 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 19:13:13,420 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:13:13,424 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 19:13:13,459 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:13:13,460 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-10-13 19:13:13,461 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:108, output treesize:112 [2019-10-13 19:13:16,247 WARN L191 SmtUtils]: Spent 2.69 s on a formula simplification that was a NOOP. DAG size: 55 [2019-10-13 19:13:16,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:13:21,434 WARN L191 SmtUtils]: Spent 4.89 s on a formula simplification that was a NOOP. DAG size: 61 [2019-10-13 19:13:21,437 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:13:21,505 INFO L375 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 468 treesize of output 464 [2019-10-13 19:13:21,506 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:13:21,548 INFO L375 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 468 treesize of output 464 [2019-10-13 19:13:21,549 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 19:13:21,742 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2019-10-13 19:13:21,742 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:13:21,744 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2019-10-13 19:13:21,744 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:937, output treesize:929 [2019-10-13 19:13:24,188 WARN L191 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 97 [2019-10-13 19:13:24,204 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:13:24,221 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 19:13:24,222 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:13:24,240 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:13:24,241 INFO L375 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 485 treesize of output 489 [2019-10-13 19:13:24,242 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 19:13:24,282 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:13:24,287 INFO L392 ElimStorePlain]: Different costs {16=[|v_#memory_$Pointer$.offset_BEFORE_CALL_4|], 52=[|v_old(#memory_$Pointer$.base)_AFTER_CALL_6|]} [2019-10-13 19:13:24,297 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 19:13:24,302 INFO L375 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 343 treesize of output 331 [2019-10-13 19:13:24,303 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-13 19:13:24,329 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:13:24,331 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 19:13:24,335 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 19:13:24,355 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:13:24,355 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 63 [2019-10-13 19:13:24,357 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-10-13 19:13:24,413 INFO L567 ElimStorePlain]: treesize reduction 32, result has 63.6 percent of original size [2019-10-13 19:13:24,415 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:13:24,415 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:971, output treesize:62 [2019-10-13 19:13:24,507 INFO L375 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 [2019-10-13 19:13:24,508 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:13:24,519 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:13:24,521 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 19:13:24,521 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:62 [2019-10-13 19:13:24,651 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:13:24,652 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 33 [2019-10-13 19:13:24,653 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:13:24,654 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:13:24,656 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:13:24,656 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:13:24,656 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:4 [2019-10-13 19:13:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 19:13:24,670 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:13:24,670 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 37 [2019-10-13 19:13:24,671 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196963634] [2019-10-13 19:13:24,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-13 19:13:24,672 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:13:24,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-13 19:13:24,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1246, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 19:13:24,673 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 37 states. [2019-10-13 19:13:32,940 WARN L191 SmtUtils]: Spent 5.55 s on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2019-10-13 19:13:41,637 WARN L191 SmtUtils]: Spent 8.45 s on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2019-10-13 19:13:49,746 WARN L191 SmtUtils]: Spent 5.29 s on a formula simplification. DAG size of input: 150 DAG size of output: 125 [2019-10-13 19:13:50,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:13:50,733 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2019-10-13 19:13:50,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 19:13:50,735 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 42 [2019-10-13 19:13:50,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:13:50,736 INFO L225 Difference]: With dead ends: 93 [2019-10-13 19:13:50,736 INFO L226 Difference]: Without dead ends: 63 [2019-10-13 19:13:50,738 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 33.1s TimeCoverageRelationStatistics Valid=266, Invalid=3394, Unknown=0, NotChecked=0, Total=3660 [2019-10-13 19:13:50,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-13 19:13:50,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2019-10-13 19:13:50,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-13 19:13:50,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2019-10-13 19:13:50,746 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 42 [2019-10-13 19:13:50,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:13:50,746 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2019-10-13 19:13:50,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-13 19:13:50,747 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2019-10-13 19:13:50,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 19:13:50,747 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:13:50,748 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:13:50,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:13:50,949 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:13:50,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:13:50,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1192853834, now seen corresponding path program 1 times [2019-10-13 19:13:50,950 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:13:50,950 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162099244] [2019-10-13 19:13:50,951 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:13:50,951 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:13:50,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:13:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:51,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:13:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat