/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:15:00,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:15:00,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:15:00,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:15:00,446 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:15:00,448 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:15:00,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:15:00,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:15:00,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:15:00,461 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:15:00,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:15:00,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:15:00,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:15:00,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:15:00,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:15:00,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:15:00,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:15:00,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:15:00,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:15:00,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:15:00,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:15:00,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:15:00,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:15:00,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:15:00,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 21:15:00,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 21:15:00,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 21:15:00,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 21:15:00,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 21:15:00,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 21:15:00,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 21:15:00,480 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 21:15:00,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 21:15:00,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 21:15:00,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 21:15:00,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 21:15:00,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 21:15:00,484 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 21:15:00,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:15:00,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:15:00,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:15:00,487 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 [2019-11-06 21:15:00,500 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:15:00,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:15:00,501 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:15:00,501 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:15:00,501 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:15:00,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:15:00,502 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:15:00,502 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:15:00,502 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:15:00,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:15:00,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:15:00,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:15:00,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:15:00,503 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:15:00,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:15:00,503 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:15:00,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:15:00,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:15:00,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:15:00,504 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:15:00,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:15:00,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:15:00,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:15:00,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:15:00,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:15:00,506 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:15:00,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:15:00,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:15:00,506 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:15:00,783 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:15:00,805 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:15:00,809 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:15:00,811 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:15:00,811 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:15:00,812 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-2.i [2019-11-06 21:15:00,894 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28c8595c2/b58504afe6fe4742adbbcab9d51ab66c/FLAG11140efd3 [2019-11-06 21:15:01,466 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:15:01,467 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-2.i [2019-11-06 21:15:01,479 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28c8595c2/b58504afe6fe4742adbbcab9d51ab66c/FLAG11140efd3 [2019-11-06 21:15:01,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28c8595c2/b58504afe6fe4742adbbcab9d51ab66c [2019-11-06 21:15:01,746 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:15:01,753 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:15:01,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:15:01,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:15:01,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:15:01,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:15:01" (1/1) ... [2019-11-06 21:15:01,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6013bf4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:15:01, skipping insertion in model container [2019-11-06 21:15:01,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:15:01" (1/1) ... [2019-11-06 21:15:01,767 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:15:01,817 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:15:02,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:15:02,266 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:15:02,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:15:02,371 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:15:02,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:15:02 WrapperNode [2019-11-06 21:15:02,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:15:02,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:15:02,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:15:02,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:15:02,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:15:02" (1/1) ... [2019-11-06 21:15:02,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:15:02" (1/1) ... [2019-11-06 21:15:02,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:15:02" (1/1) ... [2019-11-06 21:15:02,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:15:02" (1/1) ... [2019-11-06 21:15:02,424 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:15:02" (1/1) ... [2019-11-06 21:15:02,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:15:02" (1/1) ... [2019-11-06 21:15:02,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:15:02" (1/1) ... [2019-11-06 21:15:02,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:15:02,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:15:02,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:15:02,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:15:02,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:15:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:15:02,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:15:02,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:15:02,502 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-06 21:15:02,502 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-06 21:15:02,503 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-06 21:15:02,503 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2019-11-06 21:15:02,503 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2019-11-06 21:15:02,503 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2019-11-06 21:15:02,503 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_insert [2019-11-06 21:15:02,503 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2019-11-06 21:15:02,504 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:15:02,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:15:02,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 21:15:02,504 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-06 21:15:02,504 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-06 21:15:02,505 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-06 21:15:02,505 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-06 21:15:02,505 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-06 21:15:02,505 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-06 21:15:02,505 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-06 21:15:02,505 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-06 21:15:02,506 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-06 21:15:02,506 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-06 21:15:02,506 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-06 21:15:02,506 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-06 21:15:02,506 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-06 21:15:02,506 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-06 21:15:02,507 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-06 21:15:02,507 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-06 21:15:02,507 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-06 21:15:02,507 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-06 21:15:02,507 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-06 21:15:02,507 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-06 21:15:02,507 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-06 21:15:02,508 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-06 21:15:02,508 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-06 21:15:02,508 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-06 21:15:02,508 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-06 21:15:02,508 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-06 21:15:02,508 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-06 21:15:02,509 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-06 21:15:02,509 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-06 21:15:02,509 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-06 21:15:02,509 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-06 21:15:02,509 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-06 21:15:02,509 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-06 21:15:02,509 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-06 21:15:02,510 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-06 21:15:02,510 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-06 21:15:02,510 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-06 21:15:02,510 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-06 21:15:02,510 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-06 21:15:02,510 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-06 21:15:02,511 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-06 21:15:02,511 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-06 21:15:02,511 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-06 21:15:02,511 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-06 21:15:02,511 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-06 21:15:02,511 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-06 21:15:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-06 21:15:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-06 21:15:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-06 21:15:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-06 21:15:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-06 21:15:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-06 21:15:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 21:15:02,513 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-06 21:15:02,513 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-06 21:15:02,513 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-06 21:15:02,513 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-06 21:15:02,513 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-06 21:15:02,513 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-06 21:15:02,513 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-06 21:15:02,514 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-06 21:15:02,514 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-06 21:15:02,514 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-06 21:15:02,514 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-06 21:15:02,514 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-06 21:15:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 21:15:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-06 21:15:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-06 21:15:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-06 21:15:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-06 21:15:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-06 21:15:02,516 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-06 21:15:02,516 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-06 21:15:02,516 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-06 21:15:02,516 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-06 21:15:02,516 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-06 21:15:02,516 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-06 21:15:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-06 21:15:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-06 21:15:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-06 21:15:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-06 21:15:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-06 21:15:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-06 21:15:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-06 21:15:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-06 21:15:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-06 21:15:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-06 21:15:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-06 21:15:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-06 21:15:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-06 21:15:02,519 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-06 21:15:02,519 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-06 21:15:02,519 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-06 21:15:02,519 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-06 21:15:02,519 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-06 21:15:02,520 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-06 21:15:02,520 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-06 21:15:02,520 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-06 21:15:02,520 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-06 21:15:02,520 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-06 21:15:02,520 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-06 21:15:02,520 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-06 21:15:02,521 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-06 21:15:02,521 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-06 21:15:02,521 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-06 21:15:02,521 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-06 21:15:02,521 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2019-11-06 21:15:02,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 21:15:02,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-06 21:15:02,522 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2019-11-06 21:15:02,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-06 21:15:02,522 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2019-11-06 21:15:02,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 21:15:02,522 INFO L130 BoogieDeclarations]: Found specification of procedure sll_insert [2019-11-06 21:15:02,522 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2019-11-06 21:15:02,523 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:15:02,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 21:15:02,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-06 21:15:02,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:15:02,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:15:02,845 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-06 21:15:03,087 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:15:03,087 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-06 21:15:03,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:15:03 BoogieIcfgContainer [2019-11-06 21:15:03,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:15:03,090 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:15:03,090 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:15:03,093 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:15:03,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:15:01" (1/3) ... [2019-11-06 21:15:03,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e1ab62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:15:03, skipping insertion in model container [2019-11-06 21:15:03,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:15:02" (2/3) ... [2019-11-06 21:15:03,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e1ab62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:15:03, skipping insertion in model container [2019-11-06 21:15:03,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:15:03" (3/3) ... [2019-11-06 21:15:03,097 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-2.i [2019-11-06 21:15:03,107 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:15:03,116 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:15:03,128 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:15:03,156 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:15:03,156 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:15:03,156 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:15:03,156 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:15:03,157 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:15:03,157 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:15:03,157 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:15:03,157 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:15:03,179 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2019-11-06 21:15:03,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 21:15:03,188 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:03,189 INFO L410 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] [2019-11-06 21:15:03,191 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:03,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:03,198 INFO L82 PathProgramCache]: Analyzing trace with hash -87837704, now seen corresponding path program 1 times [2019-11-06 21:15:03,208 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:03,208 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089696589] [2019-11-06 21:15:03,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:03,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 21:15:03,481 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089696589] [2019-11-06 21:15:03,481 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:15:03,482 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 21:15:03,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662804504] [2019-11-06 21:15:03,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 21:15:03,491 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:15:03,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 21:15:03,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 21:15:03,507 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 4 states. [2019-11-06 21:15:03,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:15:03,789 INFO L93 Difference]: Finished difference Result 132 states and 178 transitions. [2019-11-06 21:15:03,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 21:15:03,791 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2019-11-06 21:15:03,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:15:03,809 INFO L225 Difference]: With dead ends: 132 [2019-11-06 21:15:03,809 INFO L226 Difference]: Without dead ends: 56 [2019-11-06 21:15:03,818 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 21:15:03,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-06 21:15:03,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2019-11-06 21:15:03,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 21:15:03,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2019-11-06 21:15:03,904 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 37 [2019-11-06 21:15:03,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:15:03,905 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2019-11-06 21:15:03,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 21:15:03,905 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2019-11-06 21:15:03,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 21:15:03,910 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:03,910 INFO L410 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] [2019-11-06 21:15:03,910 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:03,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:03,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1536900415, now seen corresponding path program 1 times [2019-11-06 21:15:03,911 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:03,911 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001258814] [2019-11-06 21:15:03,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:15:04,335 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001258814] [2019-11-06 21:15:04,335 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507864289] [2019-11-06 21:15:04,335 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 [2019-11-06 21:15:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:04,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 21:15:04,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:15:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:15:04,650 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:15:04,651 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 15 [2019-11-06 21:15:04,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361963778] [2019-11-06 21:15:04,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:15:04,657 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:15:04,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:15:04,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2019-11-06 21:15:04,658 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 9 states. [2019-11-06 21:15:04,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:15:04,801 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2019-11-06 21:15:04,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:15:04,802 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2019-11-06 21:15:04,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:15:04,803 INFO L225 Difference]: With dead ends: 91 [2019-11-06 21:15:04,804 INFO L226 Difference]: Without dead ends: 53 [2019-11-06 21:15:04,805 INFO L630 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 [2019-11-06 21:15:04,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-06 21:15:04,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-06 21:15:04,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 21:15:04,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2019-11-06 21:15:04,816 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 42 [2019-11-06 21:15:04,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:15:04,819 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2019-11-06 21:15:04,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:15:04,819 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2019-11-06 21:15:04,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 21:15:04,821 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:04,821 INFO L410 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] [2019-11-06 21:15:05,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:15:05,026 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:05,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:05,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1663200358, now seen corresponding path program 1 times [2019-11-06 21:15:05,027 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:05,027 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527397635] [2019-11-06 21:15:05,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:05,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 21:15:05,346 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527397635] [2019-11-06 21:15:05,346 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:15:05,346 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-11-06 21:15:05,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881101628] [2019-11-06 21:15:05,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 21:15:05,349 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:15:05,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 21:15:05,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:15:05,351 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 12 states. [2019-11-06 21:15:05,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:15:05,862 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2019-11-06 21:15:05,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 21:15:05,864 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2019-11-06 21:15:05,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:15:05,866 INFO L225 Difference]: With dead ends: 73 [2019-11-06 21:15:05,866 INFO L226 Difference]: Without dead ends: 69 [2019-11-06 21:15:05,867 INFO L630 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 [2019-11-06 21:15:05,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-06 21:15:05,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2019-11-06 21:15:05,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-06 21:15:05,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2019-11-06 21:15:05,880 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 46 [2019-11-06 21:15:05,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:15:05,880 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2019-11-06 21:15:05,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 21:15:05,881 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2019-11-06 21:15:05,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 21:15:05,882 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:05,882 INFO L410 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] [2019-11-06 21:15:05,882 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:05,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:05,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1968577046, now seen corresponding path program 1 times [2019-11-06 21:15:05,883 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:05,883 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553948684] [2019-11-06 21:15:05,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:05,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:06,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 21:15:06,318 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553948684] [2019-11-06 21:15:06,319 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562497156] [2019-11-06 21:15:06,319 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 [2019-11-06 21:15:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:06,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 21:15:06,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:15:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:15:06,548 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:15:06,548 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 21 [2019-11-06 21:15:06,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904587048] [2019-11-06 21:15:06,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 21:15:06,550 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:15:06,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 21:15:06,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2019-11-06 21:15:06,551 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 21 states. [2019-11-06 21:15:07,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:15:07,990 INFO L93 Difference]: Finished difference Result 131 states and 162 transitions. [2019-11-06 21:15:07,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-06 21:15:07,992 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2019-11-06 21:15:07,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:15:07,994 INFO L225 Difference]: With dead ends: 131 [2019-11-06 21:15:07,994 INFO L226 Difference]: Without dead ends: 86 [2019-11-06 21:15:07,998 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2019-11-06 21:15:07,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-06 21:15:08,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2019-11-06 21:15:08,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-06 21:15:08,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2019-11-06 21:15:08,039 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 47 [2019-11-06 21:15:08,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:15:08,039 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2019-11-06 21:15:08,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 21:15:08,039 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2019-11-06 21:15:08,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 21:15:08,045 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:08,045 INFO L410 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] [2019-11-06 21:15:08,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:15:08,251 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:08,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:08,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1781197021, now seen corresponding path program 2 times [2019-11-06 21:15:08,253 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:08,253 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855615891] [2019-11-06 21:15:08,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:08,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 21:15:08,515 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855615891] [2019-11-06 21:15:08,515 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847679350] [2019-11-06 21:15:08,516 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 [2019-11-06 21:15:08,653 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:15:08,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:15:08,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-06 21:15:08,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:15:08,703 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 [2019-11-06 21:15:08,703 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:08,709 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:08,709 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:15:08,710 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:8 [2019-11-06 21:15:08,986 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 [2019-11-06 21:15:08,987 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:08,992 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:08,993 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. [2019-11-06 21:15:08,993 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:20 [2019-11-06 21:15:09,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:15:09,320 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:15:09,320 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2019-11-06 21:15:09,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446675713] [2019-11-06 21:15:09,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 21:15:09,321 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:15:09,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 21:15:09,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2019-11-06 21:15:09,322 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand 20 states. [2019-11-06 21:15:33,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:15:33,106 INFO L93 Difference]: Finished difference Result 129 states and 149 transitions. [2019-11-06 21:15:33,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 21:15:33,114 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2019-11-06 21:15:33,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:15:33,116 INFO L225 Difference]: With dead ends: 129 [2019-11-06 21:15:33,116 INFO L226 Difference]: Without dead ends: 119 [2019-11-06 21:15:33,117 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 21:15:33,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-06 21:15:33,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 89. [2019-11-06 21:15:33,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-06 21:15:33,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2019-11-06 21:15:33,135 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 51 [2019-11-06 21:15:33,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:15:33,135 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2019-11-06 21:15:33,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 21:15:33,135 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2019-11-06 21:15:33,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 21:15:33,139 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:33,140 INFO L410 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] [2019-11-06 21:15:33,344 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:15:33,345 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:33,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:33,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1370713395, now seen corresponding path program 3 times [2019-11-06 21:15:33,346 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:33,346 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876189865] [2019-11-06 21:15:33,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 21:15:33,700 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876189865] [2019-11-06 21:15:33,700 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107333805] [2019-11-06 21:15:33,700 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 [2019-11-06 21:15:33,814 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 21:15:33,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:15:33,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-06 21:15:33,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:15:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 21:15:33,955 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:15:33,956 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 20 [2019-11-06 21:15:33,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882456921] [2019-11-06 21:15:33,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 21:15:33,957 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:15:33,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 21:15:33,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2019-11-06 21:15:33,958 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand 20 states. [2019-11-06 21:15:35,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:15:35,006 INFO L93 Difference]: Finished difference Result 163 states and 222 transitions. [2019-11-06 21:15:35,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 21:15:35,006 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2019-11-06 21:15:35,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:15:35,009 INFO L225 Difference]: With dead ends: 163 [2019-11-06 21:15:35,009 INFO L226 Difference]: Without dead ends: 159 [2019-11-06 21:15:35,010 INFO L630 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 [2019-11-06 21:15:35,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-11-06 21:15:35,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 127. [2019-11-06 21:15:35,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-11-06 21:15:35,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 167 transitions. [2019-11-06 21:15:35,053 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 167 transitions. Word has length 52 [2019-11-06 21:15:35,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:15:35,054 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 167 transitions. [2019-11-06 21:15:35,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 21:15:35,054 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 167 transitions. [2019-11-06 21:15:35,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-06 21:15:35,056 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:35,056 INFO L410 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] [2019-11-06 21:15:35,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:15:35,257 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:35,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:35,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1530622877, now seen corresponding path program 4 times [2019-11-06 21:15:35,258 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:35,259 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430364027] [2019-11-06 21:15:35,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 21:15:35,688 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430364027] [2019-11-06 21:15:35,688 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582534802] [2019-11-06 21:15:35,688 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 [2019-11-06 21:15:35,815 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:15:35,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:15:35,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 56 conjunts are in the unsatisfiable core [2019-11-06 21:15:35,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:15:35,832 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 [2019-11-06 21:15:35,833 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:35,838 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:35,839 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:15:35,839 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-06 21:15:35,849 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 [2019-11-06 21:15:35,849 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:35,857 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:35,861 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 [2019-11-06 21:15:35,862 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:35,868 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:35,869 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:15:35,869 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2019-11-06 21:15:35,881 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:35,882 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 [2019-11-06 21:15:35,882 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:35,887 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:35,888 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:15:35,888 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:19 [2019-11-06 21:15:35,922 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 [2019-11-06 21:15:35,923 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:35,935 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:35,941 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 [2019-11-06 21:15:35,941 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:35,951 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:35,952 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:15:35,952 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:39 [2019-11-06 21:15:37,539 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:15:37,539 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:15:37,540 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2019-11-06 21:15:37,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279247361] [2019-11-06 21:15:37,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 21:15:37,541 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:15:37,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 21:15:37,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2019-11-06 21:15:37,542 INFO L87 Difference]: Start difference. First operand 127 states and 167 transitions. Second operand 28 states. [2019-11-06 21:15:40,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:15:40,546 INFO L93 Difference]: Finished difference Result 205 states and 268 transitions. [2019-11-06 21:15:40,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-06 21:15:40,547 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 53 [2019-11-06 21:15:40,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:15:40,549 INFO L225 Difference]: With dead ends: 205 [2019-11-06 21:15:40,550 INFO L226 Difference]: Without dead ends: 195 [2019-11-06 21:15:40,552 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2019-11-06 21:15:40,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-11-06 21:15:40,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 173. [2019-11-06 21:15:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-11-06 21:15:40,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 229 transitions. [2019-11-06 21:15:40,578 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 229 transitions. Word has length 53 [2019-11-06 21:15:40,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:15:40,578 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 229 transitions. [2019-11-06 21:15:40,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 21:15:40,579 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 229 transitions. [2019-11-06 21:15:40,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-06 21:15:40,580 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:40,580 INFO L410 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] [2019-11-06 21:15:40,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:15:40,785 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:40,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:40,785 INFO L82 PathProgramCache]: Analyzing trace with hash -407513290, now seen corresponding path program 1 times [2019-11-06 21:15:40,786 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:40,786 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724154921] [2019-11-06 21:15:40,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:40,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:40,975 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 21:15:40,975 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724154921] [2019-11-06 21:15:40,975 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730703653] [2019-11-06 21:15:40,976 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 [2019-11-06 21:15:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:41,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-06 21:15:41,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:15:41,170 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:15:41,222 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 21:15:41,223 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:15:41,223 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2019-11-06 21:15:41,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457038612] [2019-11-06 21:15:41,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 21:15:41,224 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:15:41,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 21:15:41,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2019-11-06 21:15:41,225 INFO L87 Difference]: Start difference. First operand 173 states and 229 transitions. Second operand 18 states. [2019-11-06 21:15:42,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:15:42,689 INFO L93 Difference]: Finished difference Result 332 states and 450 transitions. [2019-11-06 21:15:42,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 21:15:42,690 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2019-11-06 21:15:42,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:15:42,693 INFO L225 Difference]: With dead ends: 332 [2019-11-06 21:15:42,693 INFO L226 Difference]: Without dead ends: 222 [2019-11-06 21:15:42,695 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2019-11-06 21:15:42,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-11-06 21:15:42,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 190. [2019-11-06 21:15:42,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-11-06 21:15:42,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 256 transitions. [2019-11-06 21:15:42,724 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 256 transitions. Word has length 55 [2019-11-06 21:15:42,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:15:42,724 INFO L462 AbstractCegarLoop]: Abstraction has 190 states and 256 transitions. [2019-11-06 21:15:42,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 21:15:42,725 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 256 transitions. [2019-11-06 21:15:42,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-06 21:15:42,726 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:42,726 INFO L410 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] [2019-11-06 21:15:42,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:15:42,930 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:42,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:42,931 INFO L82 PathProgramCache]: Analyzing trace with hash -2096457032, now seen corresponding path program 1 times [2019-11-06 21:15:42,931 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:42,931 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970222671] [2019-11-06 21:15:42,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:43,184 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 21:15:43,184 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970222671] [2019-11-06 21:15:43,184 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914315930] [2019-11-06 21:15:43,184 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 [2019-11-06 21:15:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:43,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 21:15:43,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:15:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 21:15:43,384 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:15:43,384 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13] total 17 [2019-11-06 21:15:43,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543649054] [2019-11-06 21:15:43,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:15:43,388 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:15:43,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:15:43,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2019-11-06 21:15:43,388 INFO L87 Difference]: Start difference. First operand 190 states and 256 transitions. Second operand 7 states. [2019-11-06 21:15:43,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:15:43,545 INFO L93 Difference]: Finished difference Result 229 states and 309 transitions. [2019-11-06 21:15:43,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:15:43,546 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2019-11-06 21:15:43,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:15:43,548 INFO L225 Difference]: With dead ends: 229 [2019-11-06 21:15:43,549 INFO L226 Difference]: Without dead ends: 203 [2019-11-06 21:15:43,550 INFO L630 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 [2019-11-06 21:15:43,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-11-06 21:15:43,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 194. [2019-11-06 21:15:43,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-11-06 21:15:43,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 260 transitions. [2019-11-06 21:15:43,575 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 260 transitions. Word has length 55 [2019-11-06 21:15:43,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:15:43,575 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 260 transitions. [2019-11-06 21:15:43,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:15:43,575 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 260 transitions. [2019-11-06 21:15:43,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-06 21:15:43,577 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:43,578 INFO L410 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] [2019-11-06 21:15:43,791 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:15:43,791 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:43,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:43,792 INFO L82 PathProgramCache]: Analyzing trace with hash -936081888, now seen corresponding path program 2 times [2019-11-06 21:15:43,792 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:43,792 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953429235] [2019-11-06 21:15:43,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:43,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:43,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 21:15:44,078 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953429235] [2019-11-06 21:15:44,078 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334483982] [2019-11-06 21:15:44,078 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 [2019-11-06 21:15:44,214 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:15:44,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:15:44,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 21:15:44,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:15:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 21:15:44,314 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:15:44,314 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 19 [2019-11-06 21:15:44,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064159332] [2019-11-06 21:15:44,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 21:15:44,315 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:15:44,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 21:15:44,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2019-11-06 21:15:44,316 INFO L87 Difference]: Start difference. First operand 194 states and 260 transitions. Second operand 19 states. [2019-11-06 21:15:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:15:45,330 INFO L93 Difference]: Finished difference Result 293 states and 394 transitions. [2019-11-06 21:15:45,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 21:15:45,331 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2019-11-06 21:15:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:15:45,333 INFO L225 Difference]: With dead ends: 293 [2019-11-06 21:15:45,333 INFO L226 Difference]: Without dead ends: 203 [2019-11-06 21:15:45,334 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2019-11-06 21:15:45,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-11-06 21:15:45,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 177. [2019-11-06 21:15:45,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-11-06 21:15:45,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 236 transitions. [2019-11-06 21:15:45,357 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 236 transitions. Word has length 55 [2019-11-06 21:15:45,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:15:45,357 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 236 transitions. [2019-11-06 21:15:45,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 21:15:45,357 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 236 transitions. [2019-11-06 21:15:45,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-06 21:15:45,359 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:45,359 INFO L410 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] [2019-11-06 21:15:45,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:15:45,560 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:45,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:45,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1011494620, now seen corresponding path program 5 times [2019-11-06 21:15:45,561 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:45,561 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257256930] [2019-11-06 21:15:45,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 21:15:45,779 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257256930] [2019-11-06 21:15:45,779 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608517767] [2019-11-06 21:15:45,780 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 [2019-11-06 21:15:45,908 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-06 21:15:45,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:15:45,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-06 21:15:45,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:15:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 21:15:45,982 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:15:45,982 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 17 [2019-11-06 21:15:45,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070593669] [2019-11-06 21:15:45,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 21:15:45,983 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:15:45,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 21:15:45,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2019-11-06 21:15:45,984 INFO L87 Difference]: Start difference. First operand 177 states and 236 transitions. Second operand 17 states. [2019-11-06 21:15:46,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:15:46,724 INFO L93 Difference]: Finished difference Result 295 states and 392 transitions. [2019-11-06 21:15:46,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 21:15:46,725 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2019-11-06 21:15:46,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:15:46,727 INFO L225 Difference]: With dead ends: 295 [2019-11-06 21:15:46,727 INFO L226 Difference]: Without dead ends: 193 [2019-11-06 21:15:46,728 INFO L630 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 [2019-11-06 21:15:46,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-11-06 21:15:46,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 159. [2019-11-06 21:15:46,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-11-06 21:15:46,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 204 transitions. [2019-11-06 21:15:46,745 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 204 transitions. Word has length 57 [2019-11-06 21:15:46,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:15:46,745 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 204 transitions. [2019-11-06 21:15:46,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 21:15:46,746 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 204 transitions. [2019-11-06 21:15:46,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-06 21:15:46,747 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:46,747 INFO L410 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] [2019-11-06 21:15:46,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:15:46,952 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:46,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:46,953 INFO L82 PathProgramCache]: Analyzing trace with hash 402935559, now seen corresponding path program 3 times [2019-11-06 21:15:46,954 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:46,954 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913196771] [2019-11-06 21:15:46,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:47,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:47,282 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 21:15:47,282 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913196771] [2019-11-06 21:15:47,283 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40623061] [2019-11-06 21:15:47,283 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)