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/heap-data/running_example.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:08:00,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:08:00,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:08:00,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:08:00,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:08:00,236 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:08:00,238 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:08:00,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:08:00,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:08:00,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:08:00,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:08:00,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:08:00,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:08:00,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:08:00,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:08:00,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:08:00,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:08:00,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:08:00,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:08:00,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:08:00,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:08:00,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:08:00,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:08:00,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:08:00,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 22:08:00,259 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 22:08:00,259 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 22:08:00,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 22:08:00,260 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 22:08:00,261 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 22:08:00,261 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:08:00,262 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:08:00,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:08:00,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:08:00,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:08:00,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:08:00,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:08:00,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:08:00,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:08:00,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:08:00,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:08:00,268 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 22:08:00,282 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:08:00,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:08:00,283 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:08:00,283 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:08:00,284 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:08:00,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:08:00,284 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:08:00,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:08:00,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:08:00,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:08:00,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:08:00,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:08:00,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:08:00,286 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:08:00,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:08:00,286 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:08:00,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:08:00,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:08:00,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:08:00,287 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:08:00,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:08:00,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:08:00,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:08:00,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:08:00,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:08:00,288 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:08:00,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:08:00,288 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:08:00,289 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:08:00,607 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:08:00,631 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:08:00,635 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:08:00,637 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:08:00,637 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:08:00,638 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/running_example.i [2019-10-14 22:08:00,714 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a55611554/b98f96ad910e40ffa8f58c483e3aae49/FLAG43bad0284 [2019-10-14 22:08:01,247 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:08:01,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-data/running_example.i [2019-10-14 22:08:01,263 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a55611554/b98f96ad910e40ffa8f58c483e3aae49/FLAG43bad0284 [2019-10-14 22:08:01,529 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a55611554/b98f96ad910e40ffa8f58c483e3aae49 [2019-10-14 22:08:01,539 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:08:01,541 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:08:01,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:08:01,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:08:01,545 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:08:01,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:08:01" (1/1) ... [2019-10-14 22:08:01,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ca4108d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:08:01, skipping insertion in model container [2019-10-14 22:08:01,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:08:01" (1/1) ... [2019-10-14 22:08:01,557 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:08:01,606 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:08:02,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:08:02,047 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:08:02,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:08:02,154 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:08:02,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:08:02 WrapperNode [2019-10-14 22:08:02,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:08:02,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:08:02,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:08:02,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:08:02,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:08:02" (1/1) ... [2019-10-14 22:08:02,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:08:02" (1/1) ... [2019-10-14 22:08:02,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:08:02" (1/1) ... [2019-10-14 22:08:02,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:08:02" (1/1) ... [2019-10-14 22:08:02,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:08:02" (1/1) ... [2019-10-14 22:08:02,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:08:02" (1/1) ... [2019-10-14 22:08:02,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:08:02" (1/1) ... [2019-10-14 22:08:02,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:08:02,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:08:02,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:08:02,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:08:02,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:08:02" (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 [2019-10-14 22:08:02,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:08:02,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:08:02,274 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-14 22:08:02,274 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-14 22:08:02,274 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:08:02,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:08:02,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:08:02,275 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-14 22:08:02,275 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-14 22:08:02,276 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-14 22:08:02,276 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-14 22:08:02,276 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-14 22:08:02,276 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-14 22:08:02,276 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-14 22:08:02,276 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-14 22:08:02,276 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-14 22:08:02,277 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-14 22:08:02,277 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-14 22:08:02,277 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-14 22:08:02,277 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-14 22:08:02,277 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-14 22:08:02,278 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-14 22:08:02,278 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-14 22:08:02,278 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-14 22:08:02,278 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-14 22:08:02,278 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-14 22:08:02,278 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-14 22:08:02,278 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-14 22:08:02,279 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-14 22:08:02,279 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-14 22:08:02,279 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-14 22:08:02,279 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-14 22:08:02,279 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-14 22:08:02,279 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-14 22:08:02,280 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-14 22:08:02,280 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-14 22:08:02,280 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-14 22:08:02,280 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-14 22:08:02,280 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-14 22:08:02,280 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-14 22:08:02,281 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-14 22:08:02,281 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-14 22:08:02,281 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-14 22:08:02,281 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-14 22:08:02,281 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-14 22:08:02,281 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-14 22:08:02,282 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-14 22:08:02,282 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-14 22:08:02,282 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-14 22:08:02,282 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-14 22:08:02,282 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-14 22:08:02,282 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-14 22:08:02,282 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-14 22:08:02,283 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-14 22:08:02,283 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-14 22:08:02,283 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-14 22:08:02,283 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-14 22:08:02,283 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-14 22:08:02,283 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-14 22:08:02,283 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 22:08:02,283 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-14 22:08:02,283 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-14 22:08:02,284 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-14 22:08:02,284 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-14 22:08:02,284 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-14 22:08:02,284 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-14 22:08:02,284 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-14 22:08:02,284 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-14 22:08:02,284 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-14 22:08:02,284 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-14 22:08:02,285 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-14 22:08:02,285 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-14 22:08:02,285 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:08:02,285 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-14 22:08:02,285 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-14 22:08:02,285 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-14 22:08:02,285 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-14 22:08:02,286 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-14 22:08:02,286 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-14 22:08:02,286 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-14 22:08:02,286 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-14 22:08:02,286 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-14 22:08:02,286 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-14 22:08:02,286 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-14 22:08:02,287 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-14 22:08:02,287 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-14 22:08:02,287 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-14 22:08:02,287 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-14 22:08:02,287 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-14 22:08:02,287 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-14 22:08:02,287 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-14 22:08:02,288 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-14 22:08:02,288 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-14 22:08:02,288 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-14 22:08:02,288 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-14 22:08:02,288 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-14 22:08:02,288 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-14 22:08:02,288 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-14 22:08:02,289 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-14 22:08:02,289 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-14 22:08:02,289 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-14 22:08:02,289 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-14 22:08:02,289 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-14 22:08:02,289 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-14 22:08:02,289 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-14 22:08:02,289 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-14 22:08:02,289 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-14 22:08:02,289 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-14 22:08:02,290 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-14 22:08:02,290 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-14 22:08:02,290 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-14 22:08:02,290 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-14 22:08:02,290 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:08:02,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 22:08:02,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-14 22:08:02,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 22:08:02,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 22:08:02,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-14 22:08:02,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:08:02,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:08:02,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 22:08:02,816 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:08:02,817 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 22:08:02,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:08:02 BoogieIcfgContainer [2019-10-14 22:08:02,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:08:02,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:08:02,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:08:02,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:08:02,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:08:01" (1/3) ... [2019-10-14 22:08:02,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@293dc4c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:08:02, skipping insertion in model container [2019-10-14 22:08:02,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:08:02" (2/3) ... [2019-10-14 22:08:02,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@293dc4c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:08:02, skipping insertion in model container [2019-10-14 22:08:02,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:08:02" (3/3) ... [2019-10-14 22:08:02,830 INFO L109 eAbstractionObserver]: Analyzing ICFG running_example.i [2019-10-14 22:08:02,840 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:08:02,849 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:08:02,860 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:08:02,883 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:08:02,884 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:08:02,884 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:08:02,884 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:08:02,885 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:08:02,885 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:08:02,885 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:08:02,885 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:08:02,903 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-14 22:08:02,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-14 22:08:02,910 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:08:02,911 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:08:02,913 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:08:02,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:08:02,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1790475303, now seen corresponding path program 1 times [2019-10-14 22:08:02,924 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:08:02,925 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228521388] [2019-10-14 22:08:02,925 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:02,925 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:02,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:08:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:08:03,118 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228521388] [2019-10-14 22:08:03,119 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:08:03,119 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 22:08:03,120 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36427844] [2019-10-14 22:08:03,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:08:03,126 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:08:03,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:08:03,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 22:08:03,142 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-14 22:08:03,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:08:03,246 INFO L93 Difference]: Finished difference Result 32 states and 48 transitions. [2019-10-14 22:08:03,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:08:03,248 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-14 22:08:03,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:08:03,261 INFO L225 Difference]: With dead ends: 32 [2019-10-14 22:08:03,262 INFO L226 Difference]: Without dead ends: 19 [2019-10-14 22:08:03,266 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 22:08:03,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-14 22:08:03,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-14 22:08:03,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-14 22:08:03,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-10-14 22:08:03,305 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 12 [2019-10-14 22:08:03,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:08:03,305 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-10-14 22:08:03,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:08:03,306 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2019-10-14 22:08:03,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 22:08:03,307 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:08:03,307 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:08:03,307 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:08:03,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:08:03,308 INFO L82 PathProgramCache]: Analyzing trace with hash -734348207, now seen corresponding path program 1 times [2019-10-14 22:08:03,308 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:08:03,308 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606246560] [2019-10-14 22:08:03,309 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:03,309 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:03,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:08:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:08:03,461 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606246560] [2019-10-14 22:08:03,462 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:08:03,462 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 22:08:03,462 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692391858] [2019-10-14 22:08:03,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 22:08:03,464 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:08:03,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 22:08:03,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:08:03,465 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 7 states. [2019-10-14 22:08:03,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:08:03,700 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2019-10-14 22:08:03,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:08:03,701 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-10-14 22:08:03,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:08:03,703 INFO L225 Difference]: With dead ends: 41 [2019-10-14 22:08:03,704 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 22:08:03,705 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:08:03,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 22:08:03,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2019-10-14 22:08:03,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 22:08:03,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2019-10-14 22:08:03,712 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 14 [2019-10-14 22:08:03,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:08:03,713 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2019-10-14 22:08:03,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 22:08:03,713 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2019-10-14 22:08:03,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 22:08:03,714 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:08:03,714 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:08:03,714 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:08:03,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:08:03,715 INFO L82 PathProgramCache]: Analyzing trace with hash 147079127, now seen corresponding path program 1 times [2019-10-14 22:08:03,715 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:08:03,715 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295574308] [2019-10-14 22:08:03,716 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:03,716 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:03,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:08:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:08:03,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295574308] [2019-10-14 22:08:03,959 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336367439] [2019-10-14 22:08:03,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:08:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:04,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 22:08:04,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:08:04,171 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-10-14 22:08:04,171 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:04,184 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:04,191 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-14 22:08:04,193 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:04,206 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:04,206 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 22:08:04,207 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:22 [2019-10-14 22:08:04,259 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:04,260 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2019-10-14 22:08:04,261 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:04,289 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:04,297 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 22:08:04,316 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:04,324 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 22:08:04,328 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2019-10-14 22:08:04,329 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:04,344 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:04,360 INFO L341 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2019-10-14 22:08:04,361 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 1 case distinctions, treesize of input 24 treesize of output 27 [2019-10-14 22:08:04,362 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:04,375 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:04,376 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 22:08:04,377 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:73, output treesize:11 [2019-10-14 22:08:04,419 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:08:04,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:08:04,433 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:08:04,433 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2019-10-14 22:08:04,438 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036587805] [2019-10-14 22:08:04,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:08:04,439 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:08:04,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:08:04,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:08:04,440 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 11 states. [2019-10-14 22:08:04,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:08:04,806 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2019-10-14 22:08:04,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 22:08:04,806 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2019-10-14 22:08:04,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:08:04,808 INFO L225 Difference]: With dead ends: 52 [2019-10-14 22:08:04,808 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 22:08:04,809 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:08:04,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 22:08:04,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2019-10-14 22:08:04,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 22:08:04,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2019-10-14 22:08:04,816 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2019-10-14 22:08:04,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:08:04,817 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2019-10-14 22:08:04,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:08:04,817 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2019-10-14 22:08:04,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 22:08:04,818 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:08:04,818 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:08:05,024 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:08:05,025 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:08:05,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:08:05,026 INFO L82 PathProgramCache]: Analyzing trace with hash 470360634, now seen corresponding path program 1 times [2019-10-14 22:08:05,026 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:08:05,027 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075048906] [2019-10-14 22:08:05,027 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:05,028 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:05,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:08:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:08:05,212 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075048906] [2019-10-14 22:08:05,212 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4942362] [2019-10-14 22:08:05,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:08:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:05,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 22:08:05,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:08:05,350 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 22:08:05,352 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 20 treesize of output 9 [2019-10-14 22:08:05,352 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:05,362 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:05,367 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 22:08:05,369 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 20 treesize of output 9 [2019-10-14 22:08:05,370 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:05,377 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:05,377 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 22:08:05,377 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:44, output treesize:22 [2019-10-14 22:08:05,402 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 23 treesize of output 11 [2019-10-14 22:08:05,403 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:05,412 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:05,416 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 23 treesize of output 11 [2019-10-14 22:08:05,416 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:05,425 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:05,425 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 22:08:05,425 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:48, output treesize:18 [2019-10-14 22:08:05,433 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-14 22:08:05,434 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:05,442 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:05,446 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-14 22:08:05,446 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:05,451 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:05,452 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 22:08:05,452 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2019-10-14 22:08:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:08:05,455 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:08:05,455 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 22:08:05,456 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780623700] [2019-10-14 22:08:05,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 22:08:05,456 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:08:05,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 22:08:05,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:08:05,457 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand 7 states. [2019-10-14 22:08:05,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:08:05,636 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2019-10-14 22:08:05,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:08:05,637 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-10-14 22:08:05,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:08:05,638 INFO L225 Difference]: With dead ends: 58 [2019-10-14 22:08:05,638 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 22:08:05,639 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-14 22:08:05,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 22:08:05,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2019-10-14 22:08:05,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 22:08:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2019-10-14 22:08:05,647 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 20 [2019-10-14 22:08:05,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:08:05,648 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2019-10-14 22:08:05,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 22:08:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2019-10-14 22:08:05,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 22:08:05,650 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:08:05,650 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:08:05,862 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:08:05,863 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:08:05,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:08:05,863 INFO L82 PathProgramCache]: Analyzing trace with hash 977312820, now seen corresponding path program 1 times [2019-10-14 22:08:05,864 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:08:05,865 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266799106] [2019-10-14 22:08:05,865 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:05,865 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:05,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:08:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:06,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:08:06,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266799106] [2019-10-14 22:08:06,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461070778] [2019-10-14 22:08:06,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:08:06,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:06,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 22:08:06,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:08:06,108 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:08:06,158 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2019-10-14 22:08:06,159 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:06,161 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:06,161 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 22:08:06,161 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2019-10-14 22:08:06,163 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:08:06,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:08:06,168 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:08:06,170 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2019-10-14 22:08:06,170 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901602413] [2019-10-14 22:08:06,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:08:06,171 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:08:06,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:08:06,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:08:06,172 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 11 states. [2019-10-14 22:08:06,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:08:06,427 INFO L93 Difference]: Finished difference Result 88 states and 119 transitions. [2019-10-14 22:08:06,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 22:08:06,428 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2019-10-14 22:08:06,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:08:06,429 INFO L225 Difference]: With dead ends: 88 [2019-10-14 22:08:06,429 INFO L226 Difference]: Without dead ends: 86 [2019-10-14 22:08:06,430 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:08:06,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-14 22:08:06,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 58. [2019-10-14 22:08:06,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 22:08:06,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 82 transitions. [2019-10-14 22:08:06,441 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 82 transitions. Word has length 22 [2019-10-14 22:08:06,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:08:06,441 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 82 transitions. [2019-10-14 22:08:06,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:08:06,442 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 82 transitions. [2019-10-14 22:08:06,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 22:08:06,443 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:08:06,443 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:08:06,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:08:06,647 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:08:06,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:08:06,648 INFO L82 PathProgramCache]: Analyzing trace with hash 977314742, now seen corresponding path program 1 times [2019-10-14 22:08:06,648 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:08:06,648 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958501182] [2019-10-14 22:08:06,649 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:06,649 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:06,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:08:06,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:08:06,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958501182] [2019-10-14 22:08:06,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690533069] [2019-10-14 22:08:06,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:08:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:06,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 22:08:06,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:08:06,872 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-14 22:08:06,872 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:06,878 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:06,878 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 22:08:06,878 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-10-14 22:08:06,896 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2019-10-14 22:08:06,897 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:06,899 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:06,899 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 22:08:06,900 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2019-10-14 22:08:06,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:08:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:08:06,928 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:08:06,928 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2019-10-14 22:08:06,928 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376660917] [2019-10-14 22:08:06,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:08:06,929 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:08:06,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:08:06,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:08:06,930 INFO L87 Difference]: Start difference. First operand 58 states and 82 transitions. Second operand 12 states. [2019-10-14 22:08:07,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:08:07,202 INFO L93 Difference]: Finished difference Result 98 states and 134 transitions. [2019-10-14 22:08:07,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:08:07,202 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-10-14 22:08:07,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:08:07,203 INFO L225 Difference]: With dead ends: 98 [2019-10-14 22:08:07,204 INFO L226 Difference]: Without dead ends: 82 [2019-10-14 22:08:07,204 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:08:07,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-14 22:08:07,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2019-10-14 22:08:07,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-14 22:08:07,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 104 transitions. [2019-10-14 22:08:07,215 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 104 transitions. Word has length 22 [2019-10-14 22:08:07,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:08:07,215 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 104 transitions. [2019-10-14 22:08:07,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 22:08:07,216 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 104 transitions. [2019-10-14 22:08:07,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 22:08:07,217 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:08:07,217 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:08:07,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:08:07,421 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:08:07,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:08:07,422 INFO L82 PathProgramCache]: Analyzing trace with hash 167966194, now seen corresponding path program 1 times [2019-10-14 22:08:07,422 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:08:07,422 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309888301] [2019-10-14 22:08:07,423 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:07,423 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:07,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:08:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:08:07,501 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309888301] [2019-10-14 22:08:07,501 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:08:07,502 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 22:08:07,502 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029102570] [2019-10-14 22:08:07,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 22:08:07,502 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:08:07,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 22:08:07,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:08:07,503 INFO L87 Difference]: Start difference. First operand 75 states and 104 transitions. Second operand 7 states. [2019-10-14 22:08:07,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:08:07,641 INFO L93 Difference]: Finished difference Result 100 states and 137 transitions. [2019-10-14 22:08:07,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 22:08:07,641 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2019-10-14 22:08:07,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:08:07,642 INFO L225 Difference]: With dead ends: 100 [2019-10-14 22:08:07,642 INFO L226 Difference]: Without dead ends: 76 [2019-10-14 22:08:07,643 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:08:07,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-14 22:08:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-10-14 22:08:07,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-14 22:08:07,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 103 transitions. [2019-10-14 22:08:07,653 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 103 transitions. Word has length 22 [2019-10-14 22:08:07,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:08:07,653 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 103 transitions. [2019-10-14 22:08:07,653 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 22:08:07,653 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 103 transitions. [2019-10-14 22:08:07,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 22:08:07,654 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:08:07,654 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:08:07,655 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:08:07,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:08:07,655 INFO L82 PathProgramCache]: Analyzing trace with hash 238325853, now seen corresponding path program 2 times [2019-10-14 22:08:07,655 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:08:07,655 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191068662] [2019-10-14 22:08:07,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:07,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:07,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:08:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:08:07,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191068662] [2019-10-14 22:08:07,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761328036] [2019-10-14 22:08:07,805 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:08:07,900 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 22:08:07,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 22:08:07,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-14 22:08:07,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:08:07,916 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-10-14 22:08:07,916 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:07,925 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:07,930 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-14 22:08:07,930 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:07,939 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:07,940 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 22:08:07,940 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:22 [2019-10-14 22:08:07,986 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:07,987 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2019-10-14 22:08:07,988 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:08,051 INFO L567 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2019-10-14 22:08:08,056 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 22:08:08,088 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:08,091 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 22:08:08,114 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:08,130 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 22:08:08,141 INFO L341 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2019-10-14 22:08:08,142 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2019-10-14 22:08:08,143 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:08,163 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:08,164 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 22:08:08,165 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:79, output treesize:25 [2019-10-14 22:08:08,226 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:08,227 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2019-10-14 22:08:08,228 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:08,265 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:08,273 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2019-10-14 22:08:08,273 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:08,290 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:08,296 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2019-10-14 22:08:08,296 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:08,308 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:08,316 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2019-10-14 22:08:08,316 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:08,328 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:08,329 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 22:08:08,329 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:79, output treesize:11 [2019-10-14 22:08:08,372 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:08:08,379 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:08:08,380 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:08:08,380 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2019-10-14 22:08:08,380 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653505728] [2019-10-14 22:08:08,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:08:08,381 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:08:08,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:08:08,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:08:08,381 INFO L87 Difference]: Start difference. First operand 75 states and 103 transitions. Second operand 12 states. [2019-10-14 22:08:08,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:08:08,771 INFO L93 Difference]: Finished difference Result 137 states and 190 transitions. [2019-10-14 22:08:08,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 22:08:08,772 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-10-14 22:08:08,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:08:08,773 INFO L225 Difference]: With dead ends: 137 [2019-10-14 22:08:08,773 INFO L226 Difference]: Without dead ends: 117 [2019-10-14 22:08:08,774 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2019-10-14 22:08:08,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-14 22:08:08,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 71. [2019-10-14 22:08:08,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 22:08:08,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 97 transitions. [2019-10-14 22:08:08,785 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 97 transitions. Word has length 22 [2019-10-14 22:08:08,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:08:08,785 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 97 transitions. [2019-10-14 22:08:08,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 22:08:08,786 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 97 transitions. [2019-10-14 22:08:08,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 22:08:08,787 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:08:08,787 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:08:08,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:08:08,992 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:08:08,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:08:08,993 INFO L82 PathProgramCache]: Analyzing trace with hash -2035848896, now seen corresponding path program 1 times [2019-10-14 22:08:08,993 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:08:08,994 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138955042] [2019-10-14 22:08:08,994 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:08,994 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:08,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:08:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:09,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:08:09,392 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138955042] [2019-10-14 22:08:09,392 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649292482] [2019-10-14 22:08:09,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:08:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:09,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-14 22:08:09,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:08:09,500 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-10-14 22:08:09,501 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:09,509 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:09,509 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 22:08:09,509 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:15 [2019-10-14 22:08:09,531 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:09,531 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2019-10-14 22:08:09,532 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:09,560 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:09,567 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 22:08:09,571 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 17 [2019-10-14 22:08:09,572 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:09,591 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:09,595 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 22:08:09,599 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 17 [2019-10-14 22:08:09,599 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:09,617 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:09,627 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-14 22:08:09,627 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:09,653 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:09,654 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 22:08:09,654 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:101, output treesize:61 [2019-10-14 22:08:09,714 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2019-10-14 22:08:09,715 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:09,732 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:09,779 INFO L341 Elim1Store]: treesize reduction 32, result has 59.0 percent of original size [2019-10-14 22:08:09,780 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 87 [2019-10-14 22:08:09,782 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:09,815 INFO L567 ElimStorePlain]: treesize reduction 44, result has 63.9 percent of original size [2019-10-14 22:08:09,820 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2019-10-14 22:08:09,821 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:09,836 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:09,836 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 22:08:09,837 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:108, output treesize:61 [2019-10-14 22:08:09,857 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:09,857 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 56 [2019-10-14 22:08:09,858 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:09,877 INFO L567 ElimStorePlain]: treesize reduction 18, result has 66.7 percent of original size [2019-10-14 22:08:09,880 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 19 [2019-10-14 22:08:09,880 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:09,886 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:09,886 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 22:08:09,886 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:72, output treesize:7 [2019-10-14 22:08:09,887 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:08:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:08:09,896 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:08:09,896 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2019-10-14 22:08:09,897 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009032064] [2019-10-14 22:08:09,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:08:09,898 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:08:09,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:08:09,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:08:09,898 INFO L87 Difference]: Start difference. First operand 71 states and 97 transitions. Second operand 12 states. [2019-10-14 22:08:11,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:08:11,357 INFO L93 Difference]: Finished difference Result 166 states and 224 transitions. [2019-10-14 22:08:11,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 22:08:11,357 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2019-10-14 22:08:11,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:08:11,359 INFO L225 Difference]: With dead ends: 166 [2019-10-14 22:08:11,360 INFO L226 Difference]: Without dead ends: 164 [2019-10-14 22:08:11,361 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2019-10-14 22:08:11,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-10-14 22:08:11,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 115. [2019-10-14 22:08:11,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-10-14 22:08:11,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 164 transitions. [2019-10-14 22:08:11,373 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 164 transitions. Word has length 24 [2019-10-14 22:08:11,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:08:11,373 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 164 transitions. [2019-10-14 22:08:11,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 22:08:11,374 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 164 transitions. [2019-10-14 22:08:11,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 22:08:11,375 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:08:11,375 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:08:11,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:08:11,579 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:08:11,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:08:11,580 INFO L82 PathProgramCache]: Analyzing trace with hash -2035846974, now seen corresponding path program 1 times [2019-10-14 22:08:11,580 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:08:11,581 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793325157] [2019-10-14 22:08:11,581 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:11,581 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:11,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:08:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:08:11,869 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793325157] [2019-10-14 22:08:11,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688535648] [2019-10-14 22:08:11,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:08:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:11,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-14 22:08:11,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:08:12,024 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-10-14 22:08:12,024 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:12,029 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:12,029 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 22:08:12,030 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:15 [2019-10-14 22:08:12,049 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:12,050 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2019-10-14 22:08:12,050 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:12,077 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:12,082 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 22:08:12,085 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 19 [2019-10-14 22:08:12,085 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:12,108 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:12,113 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 22:08:12,115 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 19 [2019-10-14 22:08:12,116 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:12,135 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:12,142 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-14 22:08:12,143 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:12,160 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:12,161 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 22:08:12,162 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:109, output treesize:75 [2019-10-14 22:08:12,226 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2019-10-14 22:08:12,226 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:12,245 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:12,304 INFO L341 Elim1Store]: treesize reduction 32, result has 59.0 percent of original size [2019-10-14 22:08:12,305 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 87 [2019-10-14 22:08:12,308 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:12,343 INFO L567 ElimStorePlain]: treesize reduction 44, result has 63.3 percent of original size [2019-10-14 22:08:12,347 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2019-10-14 22:08:12,348 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:12,362 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:12,362 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 22:08:12,363 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:108, output treesize:61 [2019-10-14 22:08:12,383 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:12,384 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 56 [2019-10-14 22:08:12,385 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:12,401 INFO L567 ElimStorePlain]: treesize reduction 18, result has 66.7 percent of original size [2019-10-14 22:08:12,404 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 19 [2019-10-14 22:08:12,404 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:12,408 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:12,409 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 22:08:12,409 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:72, output treesize:7 [2019-10-14 22:08:12,424 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:08:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:08:12,432 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:08:12,432 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2019-10-14 22:08:12,432 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544945385] [2019-10-14 22:08:12,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:08:12,433 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:08:12,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:08:12,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:08:12,433 INFO L87 Difference]: Start difference. First operand 115 states and 164 transitions. Second operand 12 states. [2019-10-14 22:08:14,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:08:14,009 INFO L93 Difference]: Finished difference Result 265 states and 379 transitions. [2019-10-14 22:08:14,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 22:08:14,010 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2019-10-14 22:08:14,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:08:14,012 INFO L225 Difference]: With dead ends: 265 [2019-10-14 22:08:14,012 INFO L226 Difference]: Without dead ends: 208 [2019-10-14 22:08:14,013 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2019-10-14 22:08:14,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-10-14 22:08:14,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 168. [2019-10-14 22:08:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-10-14 22:08:14,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 240 transitions. [2019-10-14 22:08:14,028 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 240 transitions. Word has length 24 [2019-10-14 22:08:14,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:08:14,028 INFO L462 AbstractCegarLoop]: Abstraction has 168 states and 240 transitions. [2019-10-14 22:08:14,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 22:08:14,028 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 240 transitions. [2019-10-14 22:08:14,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 22:08:14,029 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:08:14,030 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:08:14,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:08:14,233 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:08:14,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:08:14,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1986609468, now seen corresponding path program 1 times [2019-10-14 22:08:14,234 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:08:14,234 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063995734] [2019-10-14 22:08:14,234 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:14,234 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:14,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:08:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 22:08:14,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063995734] [2019-10-14 22:08:14,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229367285] [2019-10-14 22:08:14,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:08:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:14,406 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 22:08:14,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:08:14,426 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2019-10-14 22:08:14,427 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 22:08:14,429 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 22:08:14,429 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 22:08:14,429 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2019-10-14 22:08:14,431 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:08:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 22:08:14,437 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:08:14,437 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 9 [2019-10-14 22:08:14,437 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685725858] [2019-10-14 22:08:14,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:08:14,438 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:08:14,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:08:14,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:08:14,439 INFO L87 Difference]: Start difference. First operand 168 states and 240 transitions. Second operand 9 states. [2019-10-14 22:08:14,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:08:14,624 INFO L93 Difference]: Finished difference Result 308 states and 441 transitions. [2019-10-14 22:08:14,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 22:08:14,626 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-10-14 22:08:14,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:08:14,627 INFO L225 Difference]: With dead ends: 308 [2019-10-14 22:08:14,627 INFO L226 Difference]: Without dead ends: 237 [2019-10-14 22:08:14,628 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:08:14,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-10-14 22:08:14,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 201. [2019-10-14 22:08:14,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2019-10-14 22:08:14,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 292 transitions. [2019-10-14 22:08:14,640 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 292 transitions. Word has length 26 [2019-10-14 22:08:14,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:08:14,641 INFO L462 AbstractCegarLoop]: Abstraction has 201 states and 292 transitions. [2019-10-14 22:08:14,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:08:14,641 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 292 transitions. [2019-10-14 22:08:14,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 22:08:14,642 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:08:14,642 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:08:14,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:08:14,847 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:08:14,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:08:14,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1177260920, now seen corresponding path program 1 times [2019-10-14 22:08:14,848 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:08:14,848 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255595837] [2019-10-14 22:08:14,848 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:14,849 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:08:14,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:08:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 22:08:14,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255595837] [2019-10-14 22:08:14,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831617561] [2019-10-14 22:08:14,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:08:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:08:15,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 22:08:15,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:08:15,082 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:08:15,082 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:08:15,102 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2019-10-14 22:08:15,105 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 22:08:15,115 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 24 [2019-10-14 22:08:15,116 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 22:08:15,125 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2019-10-14 22:08:15,126 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 22:08:15,172 INFO L567 ElimStorePlain]: treesize reduction 28, result has 53.3 percent of original size [2019-10-14 22:08:15,174 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-10-14 22:08:15,174 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:112, output treesize:32 [2019-10-14 22:08:20,163 WARN L191 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 23 DAG size of output: 13 [2019-10-14 22:08:23,003 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:08:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 22:08:23,010 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:08:23,011 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2019-10-14 22:08:23,011 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670110772] [2019-10-14 22:08:23,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:08:23,012 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:08:23,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:08:23,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=81, Unknown=4, NotChecked=0, Total=110 [2019-10-14 22:08:23,012 INFO L87 Difference]: Start difference. First operand 201 states and 292 transitions. Second operand 11 states.