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-ext3-properties/sll_nondet_insert-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:12:04,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:12:04,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:12:04,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:12:04,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:12:04,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:12:04,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:12:04,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:12:04,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:12:04,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:12:04,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:12:04,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:12:04,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:12:04,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:12:04,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:12:04,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:12:04,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:12:04,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:12:04,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:12:04,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:12:04,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:12:04,686 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:12:04,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:12:04,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:12:04,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 19:12:04,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 19:12:04,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 19:12:04,691 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 19:12:04,692 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 19:12:04,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 19:12:04,693 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:12:04,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:12:04,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:12:04,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:12:04,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:12:04,696 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:12:04,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:12:04,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:12:04,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:12:04,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:12:04,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:12:04,700 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 19:12:04,713 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:12:04,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:12:04,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:12:04,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:12:04,715 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:12:04,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:12:04,715 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:12:04,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:12:04,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:12:04,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:12:04,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:12:04,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:12:04,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:12:04,717 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:12:04,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:12:04,717 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:12:04,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:12:04,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:12:04,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:12:04,718 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:12:04,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:12:04,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:12:04,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:12:04,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:12:04,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:12:04,719 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:12:04,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:12:04,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:12:04,720 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:12:04,992 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:12:05,004 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:12:05,007 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:12:05,009 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:12:05,009 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:12:05,010 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-2.i [2019-10-13 19:12:05,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b98304d4/45538317873b40aeaf1adbc8782efd7d/FLAGd87b2a06a [2019-10-13 19:12:05,648 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:12:05,649 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-2.i [2019-10-13 19:12:05,663 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b98304d4/45538317873b40aeaf1adbc8782efd7d/FLAGd87b2a06a [2019-10-13 19:12:05,931 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b98304d4/45538317873b40aeaf1adbc8782efd7d [2019-10-13 19:12:05,939 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:12:05,941 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:12:05,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:12:05,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:12:05,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:12:05,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:12:05" (1/1) ... [2019-10-13 19:12:05,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10977f2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:05, skipping insertion in model container [2019-10-13 19:12:05,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:12:05" (1/1) ... [2019-10-13 19:12:05,954 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:12:06,002 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:12:06,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:12:06,484 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:12:06,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:12:06,592 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:12:06,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:06 WrapperNode [2019-10-13 19:12:06,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:12:06,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:12:06,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:12:06,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:12:06,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:06" (1/1) ... [2019-10-13 19:12:06,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:06" (1/1) ... [2019-10-13 19:12:06,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:06" (1/1) ... [2019-10-13 19:12:06,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:06" (1/1) ... [2019-10-13 19:12:06,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:06" (1/1) ... [2019-10-13 19:12:06,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:06" (1/1) ... [2019-10-13 19:12:06,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:06" (1/1) ... [2019-10-13 19:12:06,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:12:06,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:12:06,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:12:06,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:12:06,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:06" (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 19:12:06,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:12:06,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:12:06,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-13 19:12:06,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-13 19:12:06,729 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-13 19:12:06,729 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2019-10-13 19:12:06,729 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2019-10-13 19:12:06,730 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2019-10-13 19:12:06,730 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_insert [2019-10-13 19:12:06,730 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2019-10-13 19:12:06,730 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:12:06,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:12:06,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 19:12:06,731 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-13 19:12:06,731 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-13 19:12:06,731 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-13 19:12:06,731 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-13 19:12:06,732 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-13 19:12:06,732 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-13 19:12:06,732 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-13 19:12:06,732 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-13 19:12:06,732 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-13 19:12:06,733 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-13 19:12:06,733 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-13 19:12:06,733 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-13 19:12:06,733 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-13 19:12:06,733 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-13 19:12:06,733 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-13 19:12:06,734 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-13 19:12:06,734 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-13 19:12:06,734 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-13 19:12:06,734 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-13 19:12:06,734 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-13 19:12:06,734 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-13 19:12:06,735 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-13 19:12:06,735 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-13 19:12:06,735 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-13 19:12:06,735 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-13 19:12:06,735 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-13 19:12:06,735 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-13 19:12:06,735 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-13 19:12:06,736 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-13 19:12:06,736 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-13 19:12:06,736 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-13 19:12:06,736 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-13 19:12:06,736 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-13 19:12:06,736 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-13 19:12:06,737 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-13 19:12:06,737 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-13 19:12:06,737 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-13 19:12:06,737 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-13 19:12:06,737 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-13 19:12:06,737 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-13 19:12:06,738 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-13 19:12:06,738 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-13 19:12:06,738 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-13 19:12:06,738 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-13 19:12:06,738 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-13 19:12:06,738 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-13 19:12:06,739 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-13 19:12:06,739 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-13 19:12:06,739 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-13 19:12:06,739 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-13 19:12:06,739 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-13 19:12:06,739 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-13 19:12:06,739 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 19:12:06,740 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-13 19:12:06,740 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-13 19:12:06,740 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 19:12:06,740 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-13 19:12:06,740 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-13 19:12:06,741 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-13 19:12:06,741 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-13 19:12:06,741 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-13 19:12:06,741 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-13 19:12:06,741 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-13 19:12:06,741 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-13 19:12:06,742 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-13 19:12:06,742 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 19:12:06,742 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-13 19:12:06,742 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-13 19:12:06,742 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-13 19:12:06,742 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-13 19:12:06,743 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-13 19:12:06,743 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-13 19:12:06,743 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-13 19:12:06,743 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-13 19:12:06,743 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-13 19:12:06,743 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-13 19:12:06,743 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-13 19:12:06,744 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-13 19:12:06,744 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-13 19:12:06,744 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-13 19:12:06,744 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-13 19:12:06,744 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-13 19:12:06,744 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-13 19:12:06,745 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-13 19:12:06,745 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-13 19:12:06,745 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-13 19:12:06,745 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-13 19:12:06,745 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-13 19:12:06,746 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-13 19:12:06,746 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-13 19:12:06,746 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-13 19:12:06,746 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-13 19:12:06,746 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-13 19:12:06,746 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-13 19:12:06,747 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-13 19:12:06,747 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-13 19:12:06,747 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-13 19:12:06,747 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-13 19:12:06,747 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-13 19:12:06,747 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-13 19:12:06,747 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-13 19:12:06,748 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-13 19:12:06,748 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-13 19:12:06,748 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-13 19:12:06,748 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-13 19:12:06,748 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-13 19:12:06,748 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2019-10-13 19:12:06,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 19:12:06,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 19:12:06,749 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2019-10-13 19:12:06,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 19:12:06,749 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2019-10-13 19:12:06,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 19:12:06,749 INFO L130 BoogieDeclarations]: Found specification of procedure sll_insert [2019-10-13 19:12:06,750 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2019-10-13 19:12:06,750 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:12:06,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 19:12:06,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-13 19:12:06,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:12:06,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:12:07,134 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-13 19:12:07,404 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:12:07,404 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-13 19:12:07,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:12:07 BoogieIcfgContainer [2019-10-13 19:12:07,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:12:07,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:12:07,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:12:07,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:12:07,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:12:05" (1/3) ... [2019-10-13 19:12:07,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ad8684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:12:07, skipping insertion in model container [2019-10-13 19:12:07,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:06" (2/3) ... [2019-10-13 19:12:07,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ad8684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:12:07, skipping insertion in model container [2019-10-13 19:12:07,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:12:07" (3/3) ... [2019-10-13 19:12:07,414 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-2.i [2019-10-13 19:12:07,425 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:12:07,435 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:12:07,447 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:12:07,472 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:12:07,472 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:12:07,472 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:12:07,473 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:12:07,473 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:12:07,473 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:12:07,473 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:12:07,473 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:12:07,491 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2019-10-13 19:12:07,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-13 19:12:07,498 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:12:07,499 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] [2019-10-13 19:12:07,502 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:12:07,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:12:07,507 INFO L82 PathProgramCache]: Analyzing trace with hash -87837704, now seen corresponding path program 1 times [2019-10-13 19:12:07,515 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:12:07,516 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607141033] [2019-10-13 19:12:07,516 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:07,516 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:07,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:12:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 19:12:07,785 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607141033] [2019-10-13 19:12:07,786 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:12:07,787 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:12:07,787 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582998602] [2019-10-13 19:12:07,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:12:07,796 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:12:07,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:12:07,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:12:07,814 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 4 states. [2019-10-13 19:12:08,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:12:08,068 INFO L93 Difference]: Finished difference Result 132 states and 178 transitions. [2019-10-13 19:12:08,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:12:08,070 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2019-10-13 19:12:08,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:12:08,083 INFO L225 Difference]: With dead ends: 132 [2019-10-13 19:12:08,083 INFO L226 Difference]: Without dead ends: 56 [2019-10-13 19:12:08,093 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 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 19:12:08,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-13 19:12:08,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2019-10-13 19:12:08,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-13 19:12:08,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2019-10-13 19:12:08,151 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 37 [2019-10-13 19:12:08,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:12:08,151 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2019-10-13 19:12:08,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:12:08,152 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2019-10-13 19:12:08,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 19:12:08,154 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:12:08,155 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:12:08,155 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:12:08,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:12:08,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1536900415, now seen corresponding path program 1 times [2019-10-13 19:12:08,156 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:12:08,156 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286980344] [2019-10-13 19:12:08,156 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:08,156 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:08,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:12:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 19:12:08,459 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286980344] [2019-10-13 19:12:08,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914129122] [2019-10-13 19:12:08,460 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 19:12:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:08,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 19:12:08,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:12:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:12:08,731 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:12:08,731 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 15 [2019-10-13 19:12:08,732 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003633632] [2019-10-13 19:12:08,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 19:12:08,734 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:12:08,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 19:12:08,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:12:08,734 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 9 states. [2019-10-13 19:12:08,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:12:08,873 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2019-10-13 19:12:08,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 19:12:08,875 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2019-10-13 19:12:08,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:12:08,877 INFO L225 Difference]: With dead ends: 91 [2019-10-13 19:12:08,877 INFO L226 Difference]: Without dead ends: 53 [2019-10-13 19:12:08,880 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2019-10-13 19:12:08,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-13 19:12:08,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-10-13 19:12:08,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-13 19:12:08,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2019-10-13 19:12:08,900 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 42 [2019-10-13 19:12:08,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:12:08,907 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2019-10-13 19:12:08,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 19:12:08,907 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2019-10-13 19:12:08,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 19:12:08,909 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:12:08,909 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:12:09,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:12:09,116 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:12:09,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:12:09,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1663200358, now seen corresponding path program 1 times [2019-10-13 19:12:09,117 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:12:09,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056672594] [2019-10-13 19:12:09,117 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:09,117 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:09,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:12:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:09,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 19:12:09,462 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056672594] [2019-10-13 19:12:09,462 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:12:09,462 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-13 19:12:09,463 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641080892] [2019-10-13 19:12:09,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:12:09,463 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:12:09,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:12:09,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:12:09,464 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 12 states. [2019-10-13 19:12:09,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:12:09,930 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2019-10-13 19:12:09,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 19:12:09,933 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2019-10-13 19:12:09,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:12:09,935 INFO L225 Difference]: With dead ends: 73 [2019-10-13 19:12:09,935 INFO L226 Difference]: Without dead ends: 69 [2019-10-13 19:12:09,935 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2019-10-13 19:12:09,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-13 19:12:09,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2019-10-13 19:12:09,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-13 19:12:09,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2019-10-13 19:12:09,948 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 46 [2019-10-13 19:12:09,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:12:09,948 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2019-10-13 19:12:09,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 19:12:09,949 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2019-10-13 19:12:09,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 19:12:09,950 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:12:09,950 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:12:09,950 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:12:09,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:12:09,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1968577046, now seen corresponding path program 1 times [2019-10-13 19:12:09,951 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:12:09,951 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396929642] [2019-10-13 19:12:09,951 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:09,952 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:09,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:12:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 19:12:10,339 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396929642] [2019-10-13 19:12:10,339 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309065913] [2019-10-13 19:12:10,339 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 19:12:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:10,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 19:12:10,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:12:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 19:12:10,559 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:12:10,560 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 21 [2019-10-13 19:12:10,560 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38872019] [2019-10-13 19:12:10,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 19:12:10,561 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:12:10,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 19:12:10,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2019-10-13 19:12:10,562 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 21 states. [2019-10-13 19:12:11,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:12:11,921 INFO L93 Difference]: Finished difference Result 131 states and 162 transitions. [2019-10-13 19:12:11,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 19:12:11,926 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2019-10-13 19:12:11,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:12:11,927 INFO L225 Difference]: With dead ends: 131 [2019-10-13 19:12:11,927 INFO L226 Difference]: Without dead ends: 86 [2019-10-13 19:12:11,929 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 19:12:11,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-13 19:12:11,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2019-10-13 19:12:11,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-13 19:12:11,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2019-10-13 19:12:11,942 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 47 [2019-10-13 19:12:11,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:12:11,942 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2019-10-13 19:12:11,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 19:12:11,943 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2019-10-13 19:12:11,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-13 19:12:11,944 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:12:11,944 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:12:12,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:12:12,154 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:12:12,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:12:12,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1781197021, now seen corresponding path program 2 times [2019-10-13 19:12:12,155 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:12:12,155 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238150742] [2019-10-13 19:12:12,156 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:12,156 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:12,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:12:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:12,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 19:12:12,386 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238150742] [2019-10-13 19:12:12,387 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675548449] [2019-10-13 19:12:12,387 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-10-13 19:12:12,517 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:12:12,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:12:12,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 38 conjunts are in the unsatisfiable core [2019-10-13 19:12:12,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:12:12,602 INFO L375 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 [2019-10-13 19:12:12,603 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:12,617 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:12,617 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 19:12:12,618 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:8 [2019-10-13 19:12:12,890 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 24 treesize of output 16 [2019-10-13 19:12:12,890 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:12,894 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:12,895 INFO L496 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. [2019-10-13 19:12:12,895 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:20 [2019-10-13 19:12:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:12:13,218 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:12:13,218 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2019-10-13 19:12:13,218 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367372387] [2019-10-13 19:12:13,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 19:12:13,219 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:12:13,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 19:12:13,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2019-10-13 19:12:13,220 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand 20 states. [2019-10-13 19:12:36,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:12:36,890 INFO L93 Difference]: Finished difference Result 129 states and 149 transitions. [2019-10-13 19:12:36,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 19:12:36,892 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2019-10-13 19:12:36,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:12:36,895 INFO L225 Difference]: With dead ends: 129 [2019-10-13 19:12:36,895 INFO L226 Difference]: Without dead ends: 119 [2019-10-13 19:12:36,896 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 19:12:36,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-10-13 19:12:36,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 89. [2019-10-13 19:12:36,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-13 19:12:36,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2019-10-13 19:12:36,922 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 51 [2019-10-13 19:12:36,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:12:36,923 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2019-10-13 19:12:36,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 19:12:36,923 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2019-10-13 19:12:36,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 19:12:36,925 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:12:36,925 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:12:37,127 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:12:37,128 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:12:37,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:12:37,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1370713395, now seen corresponding path program 3 times [2019-10-13 19:12:37,130 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:12:37,130 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596774559] [2019-10-13 19:12:37,130 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:37,131 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:37,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:12:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 19:12:37,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596774559] [2019-10-13 19:12:37,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733215353] [2019-10-13 19:12:37,539 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-10-13 19:12:37,658 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-13 19:12:37,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:12:37,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-13 19:12:37,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:12:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 19:12:37,769 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:12:37,769 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 20 [2019-10-13 19:12:37,769 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211704393] [2019-10-13 19:12:37,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 19:12:37,770 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:12:37,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 19:12:37,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2019-10-13 19:12:37,771 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand 20 states. [2019-10-13 19:12:38,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:12:38,901 INFO L93 Difference]: Finished difference Result 163 states and 222 transitions. [2019-10-13 19:12:38,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 19:12:38,901 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2019-10-13 19:12:38,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:12:38,906 INFO L225 Difference]: With dead ends: 163 [2019-10-13 19:12:38,907 INFO L226 Difference]: Without dead ends: 159 [2019-10-13 19:12:38,908 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2019-10-13 19:12:38,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-10-13 19:12:38,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 127. [2019-10-13 19:12:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-10-13 19:12:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 167 transitions. [2019-10-13 19:12:38,946 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 167 transitions. Word has length 52 [2019-10-13 19:12:38,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:12:38,947 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 167 transitions. [2019-10-13 19:12:38,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 19:12:38,947 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 167 transitions. [2019-10-13 19:12:38,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-13 19:12:38,949 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:12:38,949 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:12:39,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:12:39,161 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:12:39,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:12:39,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1530622877, now seen corresponding path program 4 times [2019-10-13 19:12:39,163 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:12:39,163 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419211275] [2019-10-13 19:12:39,163 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:39,164 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:39,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:12:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:39,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:39,552 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 19:12:39,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419211275] [2019-10-13 19:12:39,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812460182] [2019-10-13 19:12:39,553 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-10-13 19:12:39,662 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:12:39,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:12:39,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 56 conjunts are in the unsatisfiable core [2019-10-13 19:12:39,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:12:39,682 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 19:12:39,683 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:39,696 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:39,696 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:12:39,697 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-10-13 19:12:39,705 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 11 treesize of output 7 [2019-10-13 19:12:39,706 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:39,715 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:39,720 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 11 treesize of output 7 [2019-10-13 19:12:39,720 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:39,729 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:39,729 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:12:39,729 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2019-10-13 19:12:39,747 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:39,748 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 11 treesize of output 15 [2019-10-13 19:12:39,748 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:39,757 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:39,757 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:12:39,758 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:19 [2019-10-13 19:12:39,834 INFO L375 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 [2019-10-13 19:12:39,835 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:39,848 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:39,855 INFO L375 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 [2019-10-13 19:12:39,855 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:39,864 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:39,865 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:12:39,865 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:39 [2019-10-13 19:12:41,534 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:12:41,534 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:12:41,534 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2019-10-13 19:12:41,534 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142380854] [2019-10-13 19:12:41,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 19:12:41,535 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:12:41,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 19:12:41,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2019-10-13 19:12:41,536 INFO L87 Difference]: Start difference. First operand 127 states and 167 transitions. Second operand 28 states. [2019-10-13 19:12:44,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:12:44,957 INFO L93 Difference]: Finished difference Result 205 states and 268 transitions. [2019-10-13 19:12:44,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 19:12:44,959 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 53 [2019-10-13 19:12:44,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:12:44,960 INFO L225 Difference]: With dead ends: 205 [2019-10-13 19:12:44,960 INFO L226 Difference]: Without dead ends: 195 [2019-10-13 19:12:44,962 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2019-10-13 19:12:44,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-10-13 19:12:44,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 173. [2019-10-13 19:12:44,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-10-13 19:12:44,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 229 transitions. [2019-10-13 19:12:44,994 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 229 transitions. Word has length 53 [2019-10-13 19:12:44,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:12:44,995 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 229 transitions. [2019-10-13 19:12:44,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 19:12:44,995 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 229 transitions. [2019-10-13 19:12:44,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-13 19:12:44,997 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:12:44,997 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:12:45,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:12:45,201 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:12:45,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:12:45,202 INFO L82 PathProgramCache]: Analyzing trace with hash -407513290, now seen corresponding path program 1 times [2019-10-13 19:12:45,202 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:12:45,202 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036483091] [2019-10-13 19:12:45,203 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:45,203 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:45,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:12:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 19:12:45,518 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036483091] [2019-10-13 19:12:45,518 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577782867] [2019-10-13 19:12:45,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 19:12:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:45,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-13 19:12:45,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:12:45,733 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:12:45,792 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 19:12:45,793 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:12:45,793 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2019-10-13 19:12:45,793 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161298731] [2019-10-13 19:12:45,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 19:12:45,795 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:12:45,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 19:12:45,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2019-10-13 19:12:45,796 INFO L87 Difference]: Start difference. First operand 173 states and 229 transitions. Second operand 18 states. [2019-10-13 19:12:47,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:12:47,235 INFO L93 Difference]: Finished difference Result 332 states and 450 transitions. [2019-10-13 19:12:47,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 19:12:47,236 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2019-10-13 19:12:47,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:12:47,239 INFO L225 Difference]: With dead ends: 332 [2019-10-13 19:12:47,239 INFO L226 Difference]: Without dead ends: 222 [2019-10-13 19:12:47,241 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2019-10-13 19:12:47,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-10-13 19:12:47,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 190. [2019-10-13 19:12:47,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-10-13 19:12:47,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 256 transitions. [2019-10-13 19:12:47,273 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 256 transitions. Word has length 55 [2019-10-13 19:12:47,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:12:47,274 INFO L462 AbstractCegarLoop]: Abstraction has 190 states and 256 transitions. [2019-10-13 19:12:47,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 19:12:47,274 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 256 transitions. [2019-10-13 19:12:47,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-13 19:12:47,275 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:12:47,276 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:12:47,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:12:47,481 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:12:47,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:12:47,482 INFO L82 PathProgramCache]: Analyzing trace with hash -2096457032, now seen corresponding path program 1 times [2019-10-13 19:12:47,482 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:12:47,483 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092391897] [2019-10-13 19:12:47,483 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:47,483 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:47,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:12:47,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:47,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:47,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:47,732 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 19:12:47,733 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092391897] [2019-10-13 19:12:47,733 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805630453] [2019-10-13 19:12:47,733 INFO L94 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 [2019-10-13 19:12:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:47,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 19:12:47,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:12:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 19:12:47,948 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:12:47,948 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13] total 17 [2019-10-13 19:12:47,949 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993089636] [2019-10-13 19:12:47,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:12:47,953 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:12:47,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:12:47,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2019-10-13 19:12:47,954 INFO L87 Difference]: Start difference. First operand 190 states and 256 transitions. Second operand 7 states. [2019-10-13 19:12:48,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:12:48,065 INFO L93 Difference]: Finished difference Result 229 states and 309 transitions. [2019-10-13 19:12:48,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:12:48,065 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2019-10-13 19:12:48,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:12:48,067 INFO L225 Difference]: With dead ends: 229 [2019-10-13 19:12:48,067 INFO L226 Difference]: Without dead ends: 203 [2019-10-13 19:12:48,068 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2019-10-13 19:12:48,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-10-13 19:12:48,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 194. [2019-10-13 19:12:48,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-10-13 19:12:48,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 260 transitions. [2019-10-13 19:12:48,092 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 260 transitions. Word has length 55 [2019-10-13 19:12:48,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:12:48,093 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 260 transitions. [2019-10-13 19:12:48,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:12:48,093 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 260 transitions. [2019-10-13 19:12:48,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-13 19:12:48,095 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:12:48,095 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:12:48,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:12:48,308 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:12:48,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:12:48,308 INFO L82 PathProgramCache]: Analyzing trace with hash -936081888, now seen corresponding path program 2 times [2019-10-13 19:12:48,309 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:12:48,309 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432329848] [2019-10-13 19:12:48,309 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:48,309 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:48,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:12:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 19:12:48,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432329848] [2019-10-13 19:12:48,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146607021] [2019-10-13 19:12:48,502 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-10-13 19:12:48,613 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:12:48,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:12:48,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 19:12:48,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:12:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 19:12:48,691 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:12:48,691 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 19 [2019-10-13 19:12:48,692 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200716663] [2019-10-13 19:12:48,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 19:12:48,692 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:12:48,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 19:12:48,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2019-10-13 19:12:48,693 INFO L87 Difference]: Start difference. First operand 194 states and 260 transitions. Second operand 19 states. [2019-10-13 19:12:49,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:12:49,673 INFO L93 Difference]: Finished difference Result 293 states and 394 transitions. [2019-10-13 19:12:49,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 19:12:49,677 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2019-10-13 19:12:49,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:12:49,678 INFO L225 Difference]: With dead ends: 293 [2019-10-13 19:12:49,679 INFO L226 Difference]: Without dead ends: 203 [2019-10-13 19:12:49,680 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2019-10-13 19:12:49,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-10-13 19:12:49,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 177. [2019-10-13 19:12:49,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-10-13 19:12:49,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 236 transitions. [2019-10-13 19:12:49,699 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 236 transitions. Word has length 55 [2019-10-13 19:12:49,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:12:49,700 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 236 transitions. [2019-10-13 19:12:49,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 19:12:49,700 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 236 transitions. [2019-10-13 19:12:49,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-13 19:12:49,701 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:12:49,701 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:12:49,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:12:49,906 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:12:49,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:12:49,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1011494620, now seen corresponding path program 5 times [2019-10-13 19:12:49,907 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:12:49,907 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367230943] [2019-10-13 19:12:49,907 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:49,908 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:49,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:12:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:49,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 19:12:50,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367230943] [2019-10-13 19:12:50,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725916998] [2019-10-13 19:12:50,082 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:12:50,214 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-13 19:12:50,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:12:50,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-13 19:12:50,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:12:50,316 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 19:12:50,317 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:12:50,317 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 17 [2019-10-13 19:12:50,317 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894849846] [2019-10-13 19:12:50,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 19:12:50,318 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:12:50,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 19:12:50,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2019-10-13 19:12:50,319 INFO L87 Difference]: Start difference. First operand 177 states and 236 transitions. Second operand 17 states. [2019-10-13 19:12:51,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:12:51,043 INFO L93 Difference]: Finished difference Result 295 states and 392 transitions. [2019-10-13 19:12:51,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 19:12:51,045 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2019-10-13 19:12:51,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:12:51,047 INFO L225 Difference]: With dead ends: 295 [2019-10-13 19:12:51,047 INFO L226 Difference]: Without dead ends: 193 [2019-10-13 19:12:51,049 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2019-10-13 19:12:51,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-10-13 19:12:51,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 159. [2019-10-13 19:12:51,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-10-13 19:12:51,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 204 transitions. [2019-10-13 19:12:51,070 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 204 transitions. Word has length 57 [2019-10-13 19:12:51,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:12:51,071 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 204 transitions. [2019-10-13 19:12:51,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 19:12:51,071 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 204 transitions. [2019-10-13 19:12:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-13 19:12:51,072 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:12:51,072 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2019-10-13 19:12:51,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:12:51,281 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:12:51,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:12:51,281 INFO L82 PathProgramCache]: Analyzing trace with hash 402935559, now seen corresponding path program 3 times [2019-10-13 19:12:51,281 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:12:51,281 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384325526] [2019-10-13 19:12:51,281 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:51,282 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:51,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:12:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat