/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 03:36:21,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 03:36:21,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 03:36:21,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 03:36:21,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 03:36:21,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 03:36:21,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 03:36:21,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 03:36:21,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 03:36:21,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 03:36:21,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 03:36:21,174 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 03:36:21,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 03:36:21,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 03:36:21,180 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 03:36:21,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 03:36:21,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 03:36:21,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 03:36:21,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 03:36:21,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 03:36:21,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 03:36:21,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 03:36:21,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 03:36:21,201 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 03:36:21,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 03:36:21,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 03:36:21,213 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 03:36:21,219 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 03:36:21,220 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 03:36:21,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 03:36:21,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 03:36:21,225 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 03:36:21,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 03:36:21,226 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 03:36:21,230 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 03:36:21,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 03:36:21,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 03:36:21,232 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 03:36:21,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 03:36:21,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 03:36:21,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 03:36:21,235 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 03:36:21,271 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 03:36:21,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 03:36:21,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 03:36:21,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 03:36:21,275 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 03:36:21,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 03:36:21,275 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 03:36:21,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 03:36:21,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 03:36:21,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 03:36:21,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 03:36:21,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 03:36:21,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 03:36:21,278 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 03:36:21,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 03:36:21,279 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 03:36:21,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 03:36:21,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 03:36:21,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 03:36:21,279 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 03:36:21,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 03:36:21,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 03:36:21,280 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 03:36:21,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 03:36:21,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 03:36:21,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 03:36:21,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 03:36:21,281 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 03:36:21,281 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 03:36:21,281 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; [2020-08-19 03:36:21,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 03:36:21,618 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 03:36:21,622 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 03:36:21,623 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 03:36:21,624 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 03:36:21,625 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-08-19 03:36:21,692 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ed9caff0/9fba3b2da3a14b68896f8049a6c9b85f/FLAG5f561218d [2020-08-19 03:36:22,214 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 03:36:22,215 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-08-19 03:36:22,229 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ed9caff0/9fba3b2da3a14b68896f8049a6c9b85f/FLAG5f561218d [2020-08-19 03:36:22,539 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ed9caff0/9fba3b2da3a14b68896f8049a6c9b85f [2020-08-19 03:36:22,550 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 03:36:22,552 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 03:36:22,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 03:36:22,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 03:36:22,557 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 03:36:22,558 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:36:22" (1/1) ... [2020-08-19 03:36:22,561 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4158ef91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:36:22, skipping insertion in model container [2020-08-19 03:36:22,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:36:22" (1/1) ... [2020-08-19 03:36:22,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 03:36:22,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 03:36:23,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:36:23,125 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 03:36:23,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:36:23,245 INFO L208 MainTranslator]: Completed translation [2020-08-19 03:36:23,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:36:23 WrapperNode [2020-08-19 03:36:23,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 03:36:23,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 03:36:23,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 03:36:23,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 03:36:23,262 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:36:23" (1/1) ... [2020-08-19 03:36:23,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:36:23" (1/1) ... [2020-08-19 03:36:23,280 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:36:23" (1/1) ... [2020-08-19 03:36:23,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:36:23" (1/1) ... [2020-08-19 03:36:23,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:36:23" (1/1) ... [2020-08-19 03:36:23,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:36:23" (1/1) ... [2020-08-19 03:36:23,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:36:23" (1/1) ... [2020-08-19 03:36:23,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 03:36:23,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 03:36:23,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 03:36:23,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 03:36:23,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:36:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 03:36:23,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 03:36:23,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 03:36:23,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-19 03:36:23,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-19 03:36:23,390 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-19 03:36:23,390 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 03:36:23,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 03:36:23,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 03:36:23,391 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-19 03:36:23,392 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-19 03:36:23,392 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-19 03:36:23,393 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-19 03:36:23,393 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-19 03:36:23,393 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-19 03:36:23,393 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-19 03:36:23,394 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-19 03:36:23,394 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-19 03:36:23,394 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-19 03:36:23,394 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-19 03:36:23,395 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-19 03:36:23,395 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-19 03:36:23,395 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-19 03:36:23,396 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-19 03:36:23,396 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-19 03:36:23,397 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-19 03:36:23,398 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-19 03:36:23,399 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-19 03:36:23,399 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-19 03:36:23,399 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-19 03:36:23,399 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-19 03:36:23,399 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-19 03:36:23,399 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-19 03:36:23,399 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-19 03:36:23,400 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-19 03:36:23,400 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-19 03:36:23,400 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-19 03:36:23,401 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-19 03:36:23,401 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-19 03:36:23,401 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-19 03:36:23,401 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-19 03:36:23,401 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-19 03:36:23,401 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-19 03:36:23,401 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-19 03:36:23,402 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-19 03:36:23,402 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-19 03:36:23,402 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-19 03:36:23,402 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-19 03:36:23,402 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-19 03:36:23,402 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-19 03:36:23,403 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-19 03:36:23,403 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-19 03:36:23,403 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-19 03:36:23,403 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-19 03:36:23,403 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-19 03:36:23,404 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-19 03:36:23,404 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-19 03:36:23,405 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-19 03:36:23,405 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-19 03:36:23,405 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-19 03:36:23,405 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-19 03:36:23,406 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-19 03:36:23,406 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-19 03:36:23,406 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-19 03:36:23,406 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-19 03:36:23,406 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-19 03:36:23,406 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-19 03:36:23,406 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-19 03:36:23,407 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-19 03:36:23,408 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-19 03:36:23,408 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-19 03:36:23,408 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-19 03:36:23,409 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-19 03:36:23,409 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-19 03:36:23,410 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-19 03:36:23,410 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-19 03:36:23,410 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-19 03:36:23,411 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-19 03:36:23,411 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-19 03:36:23,411 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-19 03:36:23,411 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-19 03:36:23,411 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-19 03:36:23,412 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-19 03:36:23,413 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-19 03:36:23,413 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-19 03:36:23,413 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-19 03:36:23,413 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-19 03:36:23,413 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-19 03:36:23,413 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-19 03:36:23,413 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-19 03:36:23,414 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-19 03:36:23,414 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-19 03:36:23,414 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-19 03:36:23,414 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-19 03:36:23,414 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-19 03:36:23,414 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-19 03:36:23,414 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-19 03:36:23,415 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-19 03:36:23,415 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-19 03:36:23,415 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-19 03:36:23,415 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-19 03:36:23,415 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-19 03:36:23,415 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-19 03:36:23,415 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-19 03:36:23,415 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-19 03:36:23,415 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-19 03:36:23,415 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-19 03:36:23,415 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-19 03:36:23,416 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-19 03:36:23,416 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-19 03:36:23,416 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-19 03:36:23,416 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-19 03:36:23,416 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-19 03:36:23,416 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-19 03:36:23,416 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-19 03:36:23,416 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 03:36:23,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-19 03:36:23,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-19 03:36:23,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-19 03:36:23,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 03:36:23,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 03:36:23,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 03:36:23,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 03:36:23,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 03:36:23,767 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-19 03:36:24,068 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 03:36:24,068 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-08-19 03:36:24,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:36:24 BoogieIcfgContainer [2020-08-19 03:36:24,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 03:36:24,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 03:36:24,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 03:36:24,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 03:36:24,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 03:36:22" (1/3) ... [2020-08-19 03:36:24,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f55fb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:36:24, skipping insertion in model container [2020-08-19 03:36:24,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:36:23" (2/3) ... [2020-08-19 03:36:24,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f55fb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:36:24, skipping insertion in model container [2020-08-19 03:36:24,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:36:24" (3/3) ... [2020-08-19 03:36:24,082 INFO L109 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2020-08-19 03:36:24,094 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 03:36:24,102 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 03:36:24,117 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 03:36:24,146 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 03:36:24,146 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 03:36:24,146 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 03:36:24,147 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 03:36:24,147 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 03:36:24,147 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 03:36:24,147 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 03:36:24,148 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 03:36:24,169 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-08-19 03:36:24,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 03:36:24,178 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:36:24,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:36:24,179 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:36:24,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:36:24,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1575706012, now seen corresponding path program 1 times [2020-08-19 03:36:24,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:36:24,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153547051] [2020-08-19 03:36:24,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:36:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:24,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:36:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:36:24,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153547051] [2020-08-19 03:36:24,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:36:24,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:36:24,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577707047] [2020-08-19 03:36:24,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:36:24,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:36:24,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:36:24,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:36:24,453 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 3 states. [2020-08-19 03:36:24,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:36:24,653 INFO L93 Difference]: Finished difference Result 108 states and 166 transitions. [2020-08-19 03:36:24,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:36:24,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 03:36:24,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:36:24,669 INFO L225 Difference]: With dead ends: 108 [2020-08-19 03:36:24,669 INFO L226 Difference]: Without dead ends: 47 [2020-08-19 03:36:24,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:36:24,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-19 03:36:24,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-08-19 03:36:24,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-19 03:36:24,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2020-08-19 03:36:24,715 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 20 [2020-08-19 03:36:24,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:36:24,715 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2020-08-19 03:36:24,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:36:24,716 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2020-08-19 03:36:24,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 03:36:24,717 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:36:24,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:36:24,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 03:36:24,718 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:36:24,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:36:24,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1627887593, now seen corresponding path program 1 times [2020-08-19 03:36:24,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:36:24,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134235136] [2020-08-19 03:36:24,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:36:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:24,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:36:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:36:24,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134235136] [2020-08-19 03:36:24,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:36:24,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 03:36:24,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782214476] [2020-08-19 03:36:24,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 03:36:24,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:36:24,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 03:36:24,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 03:36:24,848 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand 4 states. [2020-08-19 03:36:25,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:36:25,013 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2020-08-19 03:36:25,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 03:36:25,014 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-19 03:36:25,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:36:25,017 INFO L225 Difference]: With dead ends: 75 [2020-08-19 03:36:25,017 INFO L226 Difference]: Without dead ends: 55 [2020-08-19 03:36:25,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 03:36:25,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-19 03:36:25,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-08-19 03:36:25,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-19 03:36:25,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 77 transitions. [2020-08-19 03:36:25,028 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 77 transitions. Word has length 25 [2020-08-19 03:36:25,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:36:25,029 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 77 transitions. [2020-08-19 03:36:25,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 03:36:25,029 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 77 transitions. [2020-08-19 03:36:25,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 03:36:25,030 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:36:25,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:36:25,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 03:36:25,031 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:36:25,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:36:25,032 INFO L82 PathProgramCache]: Analyzing trace with hash -164754602, now seen corresponding path program 1 times [2020-08-19 03:36:25,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:36:25,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459247695] [2020-08-19 03:36:25,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:36:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:25,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:36:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:36:25,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459247695] [2020-08-19 03:36:25,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:36:25,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 03:36:25,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557862329] [2020-08-19 03:36:25,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 03:36:25,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:36:25,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 03:36:25,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 03:36:25,089 INFO L87 Difference]: Start difference. First operand 55 states and 77 transitions. Second operand 4 states. [2020-08-19 03:36:25,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:36:25,201 INFO L93 Difference]: Finished difference Result 93 states and 131 transitions. [2020-08-19 03:36:25,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 03:36:25,202 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-08-19 03:36:25,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:36:25,203 INFO L225 Difference]: With dead ends: 93 [2020-08-19 03:36:25,203 INFO L226 Difference]: Without dead ends: 57 [2020-08-19 03:36:25,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 03:36:25,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-19 03:36:25,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-19 03:36:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-19 03:36:25,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2020-08-19 03:36:25,212 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 31 [2020-08-19 03:36:25,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:36:25,212 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2020-08-19 03:36:25,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 03:36:25,212 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2020-08-19 03:36:25,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 03:36:25,214 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:36:25,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:36:25,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 03:36:25,214 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:36:25,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:36:25,215 INFO L82 PathProgramCache]: Analyzing trace with hash -982403052, now seen corresponding path program 1 times [2020-08-19 03:36:25,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:36:25,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595267312] [2020-08-19 03:36:25,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:36:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:25,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:36:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 03:36:25,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595267312] [2020-08-19 03:36:25,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:36:25,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 03:36:25,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964239397] [2020-08-19 03:36:25,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 03:36:25,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:36:25,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 03:36:25,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 03:36:25,307 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand 6 states. [2020-08-19 03:36:25,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:36:25,505 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2020-08-19 03:36:25,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 03:36:25,506 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-08-19 03:36:25,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:36:25,507 INFO L225 Difference]: With dead ends: 82 [2020-08-19 03:36:25,507 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 03:36:25,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-19 03:36:25,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 03:36:25,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2020-08-19 03:36:25,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-19 03:36:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 91 transitions. [2020-08-19 03:36:25,518 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 91 transitions. Word has length 31 [2020-08-19 03:36:25,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:36:25,519 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 91 transitions. [2020-08-19 03:36:25,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 03:36:25,519 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 91 transitions. [2020-08-19 03:36:25,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-19 03:36:25,523 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:36:25,523 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:36:25,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 03:36:25,524 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:36:25,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:36:25,524 INFO L82 PathProgramCache]: Analyzing trace with hash 852152367, now seen corresponding path program 1 times [2020-08-19 03:36:25,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:36:25,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442240202] [2020-08-19 03:36:25,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:36:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:25,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:36:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 03:36:25,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442240202] [2020-08-19 03:36:25,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:36:25,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 03:36:25,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788533867] [2020-08-19 03:36:25,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 03:36:25,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:36:25,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 03:36:25,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 03:36:25,688 INFO L87 Difference]: Start difference. First operand 66 states and 91 transitions. Second operand 6 states. [2020-08-19 03:36:25,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:36:25,901 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-08-19 03:36:25,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 03:36:25,902 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-19 03:36:25,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:36:25,903 INFO L225 Difference]: With dead ends: 84 [2020-08-19 03:36:25,903 INFO L226 Difference]: Without dead ends: 76 [2020-08-19 03:36:25,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-19 03:36:25,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-19 03:36:25,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2020-08-19 03:36:25,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-19 03:36:25,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2020-08-19 03:36:25,912 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 33 [2020-08-19 03:36:25,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:36:25,912 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 88 transitions. [2020-08-19 03:36:25,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 03:36:25,913 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 88 transitions. [2020-08-19 03:36:25,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-19 03:36:25,914 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:36:25,914 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:36:25,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 03:36:25,914 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:36:25,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:36:25,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1876855343, now seen corresponding path program 1 times [2020-08-19 03:36:25,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:36:25,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942795400] [2020-08-19 03:36:25,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:36:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:25,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:36:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:25,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 03:36:25,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942795400] [2020-08-19 03:36:25,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:36:25,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 03:36:25,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214391012] [2020-08-19 03:36:25,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 03:36:25,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:36:25,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 03:36:25,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 03:36:25,988 INFO L87 Difference]: Start difference. First operand 64 states and 88 transitions. Second operand 6 states. [2020-08-19 03:36:26,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:36:26,196 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-08-19 03:36:26,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 03:36:26,197 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-19 03:36:26,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:36:26,199 INFO L225 Difference]: With dead ends: 84 [2020-08-19 03:36:26,199 INFO L226 Difference]: Without dead ends: 73 [2020-08-19 03:36:26,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-19 03:36:26,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-19 03:36:26,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2020-08-19 03:36:26,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-19 03:36:26,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 84 transitions. [2020-08-19 03:36:26,219 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 84 transitions. Word has length 33 [2020-08-19 03:36:26,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:36:26,219 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 84 transitions. [2020-08-19 03:36:26,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 03:36:26,220 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 84 transitions. [2020-08-19 03:36:26,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-19 03:36:26,221 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:36:26,223 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:36:26,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 03:36:26,224 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:36:26,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:36:26,225 INFO L82 PathProgramCache]: Analyzing trace with hash -778946181, now seen corresponding path program 1 times [2020-08-19 03:36:26,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:36:26,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274245067] [2020-08-19 03:36:26,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:36:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:26,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:36:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 03:36:26,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274245067] [2020-08-19 03:36:26,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:36:26,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 03:36:26,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882486013] [2020-08-19 03:36:26,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 03:36:26,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:36:26,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 03:36:26,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-19 03:36:26,388 INFO L87 Difference]: Start difference. First operand 61 states and 84 transitions. Second operand 9 states. [2020-08-19 03:36:26,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:36:26,719 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-08-19 03:36:26,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 03:36:26,720 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-08-19 03:36:26,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:36:26,721 INFO L225 Difference]: With dead ends: 86 [2020-08-19 03:36:26,721 INFO L226 Difference]: Without dead ends: 80 [2020-08-19 03:36:26,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-08-19 03:36:26,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-19 03:36:26,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2020-08-19 03:36:26,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-08-19 03:36:26,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 92 transitions. [2020-08-19 03:36:26,729 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 92 transitions. Word has length 35 [2020-08-19 03:36:26,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:36:26,750 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 92 transitions. [2020-08-19 03:36:26,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 03:36:26,750 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 92 transitions. [2020-08-19 03:36:26,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-19 03:36:26,752 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:36:26,752 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:36:26,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 03:36:26,752 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:36:26,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:36:26,753 INFO L82 PathProgramCache]: Analyzing trace with hash 84455483, now seen corresponding path program 1 times [2020-08-19 03:36:26,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:36:26,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003963692] [2020-08-19 03:36:26,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:36:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:26,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:36:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 03:36:26,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003963692] [2020-08-19 03:36:26,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:36:26,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 03:36:26,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051839323] [2020-08-19 03:36:26,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 03:36:26,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:36:26,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 03:36:26,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-19 03:36:26,856 INFO L87 Difference]: Start difference. First operand 68 states and 92 transitions. Second operand 9 states. [2020-08-19 03:36:27,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:36:27,251 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2020-08-19 03:36:27,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 03:36:27,251 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-08-19 03:36:27,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:36:27,252 INFO L225 Difference]: With dead ends: 95 [2020-08-19 03:36:27,252 INFO L226 Difference]: Without dead ends: 91 [2020-08-19 03:36:27,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-08-19 03:36:27,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-19 03:36:27,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2020-08-19 03:36:27,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-19 03:36:27,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 106 transitions. [2020-08-19 03:36:27,270 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 106 transitions. Word has length 35 [2020-08-19 03:36:27,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:36:27,270 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 106 transitions. [2020-08-19 03:36:27,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 03:36:27,271 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 106 transitions. [2020-08-19 03:36:27,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-19 03:36:27,272 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:36:27,272 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:36:27,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 03:36:27,272 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:36:27,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:36:27,273 INFO L82 PathProgramCache]: Analyzing trace with hash -169587242, now seen corresponding path program 1 times [2020-08-19 03:36:27,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:36:27,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227042502] [2020-08-19 03:36:27,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:36:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:27,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:36:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 03:36:27,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227042502] [2020-08-19 03:36:27,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:36:27,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 03:36:27,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696229051] [2020-08-19 03:36:27,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 03:36:27,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:36:27,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 03:36:27,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-19 03:36:27,483 INFO L87 Difference]: Start difference. First operand 79 states and 106 transitions. Second operand 10 states. [2020-08-19 03:36:27,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:36:27,932 INFO L93 Difference]: Finished difference Result 99 states and 128 transitions. [2020-08-19 03:36:27,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 03:36:27,932 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-08-19 03:36:27,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:36:27,933 INFO L225 Difference]: With dead ends: 99 [2020-08-19 03:36:27,934 INFO L226 Difference]: Without dead ends: 95 [2020-08-19 03:36:27,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-08-19 03:36:27,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-19 03:36:27,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2020-08-19 03:36:27,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-19 03:36:27,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2020-08-19 03:36:27,941 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 37 [2020-08-19 03:36:27,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:36:27,941 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2020-08-19 03:36:27,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 03:36:27,942 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2020-08-19 03:36:27,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-19 03:36:27,943 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:36:27,943 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:36:27,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 03:36:27,943 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:36:27,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:36:27,943 INFO L82 PathProgramCache]: Analyzing trace with hash 284097905, now seen corresponding path program 1 times [2020-08-19 03:36:27,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:36:27,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672129609] [2020-08-19 03:36:27,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:36:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:28,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:36:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 03:36:28,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672129609] [2020-08-19 03:36:28,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:36:28,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 03:36:28,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61588570] [2020-08-19 03:36:28,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 03:36:28,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:36:28,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 03:36:28,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-19 03:36:28,168 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand 10 states. [2020-08-19 03:36:28,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:36:28,542 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2020-08-19 03:36:28,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 03:36:28,543 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-08-19 03:36:28,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:36:28,544 INFO L225 Difference]: With dead ends: 101 [2020-08-19 03:36:28,544 INFO L226 Difference]: Without dead ends: 91 [2020-08-19 03:36:28,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-08-19 03:36:28,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-19 03:36:28,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 74. [2020-08-19 03:36:28,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-19 03:36:28,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2020-08-19 03:36:28,550 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 39 [2020-08-19 03:36:28,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:36:28,550 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2020-08-19 03:36:28,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 03:36:28,550 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2020-08-19 03:36:28,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-19 03:36:28,551 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:36:28,551 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:36:28,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 03:36:28,552 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:36:28,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:36:28,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1308800881, now seen corresponding path program 2 times [2020-08-19 03:36:28,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:36:28,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798492537] [2020-08-19 03:36:28,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:36:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:28,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:36:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:28,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 03:36:28,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798492537] [2020-08-19 03:36:28,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:36:28,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 03:36:28,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410753044] [2020-08-19 03:36:28,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 03:36:28,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:36:28,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 03:36:28,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-19 03:36:28,747 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand 10 states. [2020-08-19 03:36:29,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:36:29,138 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2020-08-19 03:36:29,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 03:36:29,138 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-08-19 03:36:29,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:36:29,139 INFO L225 Difference]: With dead ends: 94 [2020-08-19 03:36:29,140 INFO L226 Difference]: Without dead ends: 81 [2020-08-19 03:36:29,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-08-19 03:36:29,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-19 03:36:29,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2020-08-19 03:36:29,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-19 03:36:29,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2020-08-19 03:36:29,144 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 39 [2020-08-19 03:36:29,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:36:29,145 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2020-08-19 03:36:29,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 03:36:29,145 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2020-08-19 03:36:29,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-19 03:36:29,146 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:36:29,146 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:36:29,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 03:36:29,147 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:36:29,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:36:29,147 INFO L82 PathProgramCache]: Analyzing trace with hash -315248798, now seen corresponding path program 2 times [2020-08-19 03:36:29,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:36:29,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553220589] [2020-08-19 03:36:29,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:36:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:29,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:36:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 03:36:29,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553220589] [2020-08-19 03:36:29,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:36:29,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 03:36:29,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315829341] [2020-08-19 03:36:29,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 03:36:29,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:36:29,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 03:36:29,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-19 03:36:29,357 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand 13 states. [2020-08-19 03:36:29,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:36:29,885 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2020-08-19 03:36:29,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 03:36:29,886 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-08-19 03:36:29,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:36:29,887 INFO L225 Difference]: With dead ends: 94 [2020-08-19 03:36:29,887 INFO L226 Difference]: Without dead ends: 90 [2020-08-19 03:36:29,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-08-19 03:36:29,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-19 03:36:29,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 80. [2020-08-19 03:36:29,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-19 03:36:29,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2020-08-19 03:36:29,893 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 39 [2020-08-19 03:36:29,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:36:29,893 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2020-08-19 03:36:29,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 03:36:29,893 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2020-08-19 03:36:29,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-19 03:36:29,894 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:36:29,894 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:36:29,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 03:36:29,895 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:36:29,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:36:29,895 INFO L82 PathProgramCache]: Analyzing trace with hash -15546846, now seen corresponding path program 1 times [2020-08-19 03:36:29,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:36:29,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993207812] [2020-08-19 03:36:29,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:36:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:30,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:36:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:30,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 03:36:30,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993207812] [2020-08-19 03:36:30,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:36:30,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 03:36:30,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512534025] [2020-08-19 03:36:30,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 03:36:30,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:36:30,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 03:36:30,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-19 03:36:30,119 INFO L87 Difference]: Start difference. First operand 80 states and 106 transitions. Second operand 13 states. [2020-08-19 03:36:30,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:36:30,767 INFO L93 Difference]: Finished difference Result 107 states and 137 transitions. [2020-08-19 03:36:30,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 03:36:30,767 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-08-19 03:36:30,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:36:30,769 INFO L225 Difference]: With dead ends: 107 [2020-08-19 03:36:30,769 INFO L226 Difference]: Without dead ends: 103 [2020-08-19 03:36:30,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2020-08-19 03:36:30,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-08-19 03:36:30,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-08-19 03:36:30,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-19 03:36:30,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 109 transitions. [2020-08-19 03:36:30,775 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 109 transitions. Word has length 39 [2020-08-19 03:36:30,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:36:30,776 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 109 transitions. [2020-08-19 03:36:30,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 03:36:30,776 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 109 transitions. [2020-08-19 03:36:30,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-19 03:36:30,777 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:36:30,777 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:36:30,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 03:36:30,777 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:36:30,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:36:30,777 INFO L82 PathProgramCache]: Analyzing trace with hash 2037263357, now seen corresponding path program 1 times [2020-08-19 03:36:30,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:36:30,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984604734] [2020-08-19 03:36:30,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:36:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:30,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:36:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:30,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 03:36:30,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984604734] [2020-08-19 03:36:30,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:36:30,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 03:36:30,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125650472] [2020-08-19 03:36:30,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 03:36:30,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:36:30,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 03:36:30,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-19 03:36:30,942 INFO L87 Difference]: Start difference. First operand 82 states and 109 transitions. Second operand 13 states. [2020-08-19 03:36:31,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:36:31,532 INFO L93 Difference]: Finished difference Result 109 states and 139 transitions. [2020-08-19 03:36:31,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 03:36:31,532 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-08-19 03:36:31,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:36:31,534 INFO L225 Difference]: With dead ends: 109 [2020-08-19 03:36:31,534 INFO L226 Difference]: Without dead ends: 101 [2020-08-19 03:36:31,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-08-19 03:36:31,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-19 03:36:31,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2020-08-19 03:36:31,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-19 03:36:31,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2020-08-19 03:36:31,540 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 41 [2020-08-19 03:36:31,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:36:31,540 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2020-08-19 03:36:31,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 03:36:31,540 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2020-08-19 03:36:31,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-19 03:36:31,541 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:36:31,541 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:36:31,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 03:36:31,542 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:36:31,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:36:31,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1233000963, now seen corresponding path program 3 times [2020-08-19 03:36:31,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:36:31,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212344433] [2020-08-19 03:36:31,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:36:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:31,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:36:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:36:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 03:36:31,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212344433] [2020-08-19 03:36:31,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:36:31,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 03:36:31,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488337976] [2020-08-19 03:36:31,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 03:36:31,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:36:31,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 03:36:31,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-19 03:36:31,907 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand 13 states. [2020-08-19 03:36:32,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:36:32,676 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2020-08-19 03:36:32,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 03:36:32,677 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-08-19 03:36:32,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:36:32,678 INFO L225 Difference]: With dead ends: 116 [2020-08-19 03:36:32,679 INFO L226 Difference]: Without dead ends: 110 [2020-08-19 03:36:32,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-08-19 03:36:32,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-19 03:36:32,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2020-08-19 03:36:32,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-19 03:36:32,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 128 transitions. [2020-08-19 03:36:32,685 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 128 transitions. Word has length 41 [2020-08-19 03:36:32,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:36:32,685 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 128 transitions. [2020-08-19 03:36:32,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 03:36:32,686 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 128 transitions. [2020-08-19 03:36:32,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-19 03:36:32,686 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:36:32,687 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:36:32,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 03:36:32,687 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:36:32,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:36:32,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2006936899, now seen corresponding path program 1 times [2020-08-19 03:36:32,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:36:32,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689347829] [2020-08-19 03:36:32,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:36:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 03:36:32,743 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 03:36:32,743 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 03:36:32,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 03:36:32,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 03:36:32 BoogieIcfgContainer [2020-08-19 03:36:32,771 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 03:36:32,774 INFO L168 Benchmark]: Toolchain (without parser) took 10221.30 ms. Allocated memory was 147.3 MB in the beginning and 330.3 MB in the end (delta: 183.0 MB). Free memory was 103.8 MB in the beginning and 294.6 MB in the end (delta: -190.9 MB). Peak memory consumption was 167.9 MB. Max. memory is 7.1 GB. [2020-08-19 03:36:32,774 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 147.3 MB. Free memory was 123.4 MB in the beginning and 123.0 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-19 03:36:32,775 INFO L168 Benchmark]: CACSL2BoogieTranslator took 692.99 ms. Allocated memory was 147.3 MB in the beginning and 205.0 MB in the end (delta: 57.7 MB). Free memory was 103.4 MB in the beginning and 170.8 MB in the end (delta: -67.4 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-08-19 03:36:32,776 INFO L168 Benchmark]: Boogie Preprocessor took 73.23 ms. Allocated memory is still 205.0 MB. Free memory was 170.8 MB in the beginning and 167.1 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. [2020-08-19 03:36:32,777 INFO L168 Benchmark]: RCFGBuilder took 752.69 ms. Allocated memory is still 205.0 MB. Free memory was 167.1 MB in the beginning and 110.4 MB in the end (delta: 56.7 MB). Peak memory consumption was 56.7 MB. Max. memory is 7.1 GB. [2020-08-19 03:36:32,778 INFO L168 Benchmark]: TraceAbstraction took 8696.68 ms. Allocated memory was 205.0 MB in the beginning and 330.3 MB in the end (delta: 125.3 MB). Free memory was 110.4 MB in the beginning and 294.6 MB in the end (delta: -184.3 MB). Peak memory consumption was 116.8 MB. Max. memory is 7.1 GB. [2020-08-19 03:36:32,781 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 147.3 MB. Free memory was 123.4 MB in the beginning and 123.0 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 692.99 ms. Allocated memory was 147.3 MB in the beginning and 205.0 MB in the end (delta: 57.7 MB). Free memory was 103.4 MB in the beginning and 170.8 MB in the end (delta: -67.4 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 73.23 ms. Allocated memory is still 205.0 MB. Free memory was 170.8 MB in the beginning and 167.1 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 752.69 ms. Allocated memory is still 205.0 MB. Free memory was 167.1 MB in the beginning and 110.4 MB in the end (delta: 56.7 MB). Peak memory consumption was 56.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8696.68 ms. Allocated memory was 205.0 MB in the beginning and 330.3 MB in the end (delta: 125.3 MB). Free memory was 110.4 MB in the beginning and 294.6 MB in the end (delta: -184.3 MB). Peak memory consumption was 116.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 609]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L541] struct TreeNode* root = malloc(sizeof(*root)), *n; [L542] root->left = ((void *)0) [L543] root->right = ((void *)0) [L544] COND FALSE !(__VERIFIER_nondet_int()) [L563] n = ((void *)0) [L564] struct TreeNode* pred; [L565] COND TRUE \read(*root) [L566] pred = ((void *)0) [L567] n = root [L568] EXPR n->left [L568] n->left || n->right [L568] EXPR n->right [L568] n->left || n->right [L568] COND FALSE !(n->left || n->right) [L575] COND FALSE !(\read(*pred)) [L581] root = ((void *)0) [L565] COND FALSE !(\read(*root)) [L584] List a = (List) malloc(sizeof(struct node)); [L585] COND FALSE !(a == 0) [L586] List t; [L587] List p = a; [L588] COND TRUE __VERIFIER_nondet_int() [L589] p->h = 1 [L590] t = (List) malloc(sizeof(struct node)) [L591] COND FALSE !(t == 0) [L592] p->n = t [L593] EXPR p->n [L593] p = p->n [L588] COND FALSE !(__VERIFIER_nondet_int()) [L595] COND TRUE __VERIFIER_nondet_int() [L596] p->h = 2 [L597] t = (List) malloc(sizeof(struct node)) [L598] COND FALSE !(t == 0) [L599] p->n = t [L600] EXPR p->n [L600] p = p->n [L595] COND FALSE !(__VERIFIER_nondet_int()) [L602] p->h = 3 [L603] p = a [L604] EXPR p->h [L604] COND FALSE !(p->h == 2) [L606] EXPR p->h [L606] COND TRUE p->h == 1 [L607] EXPR p->n [L607] p = p->n [L606] EXPR p->h [L606] COND FALSE !(p->h == 1) [L608] EXPR p->h [L608] COND TRUE p->h != 3 [L609] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.6s, OverallIterations: 16, TraceHistogramMax: 3, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 855 SDtfs, 581 SDslu, 3411 SDs, 0 SdLazy, 3002 SolverSat, 254 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 222 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 154 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 559 NumberOfCodeBlocks, 559 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 503 ConstructedInterpolants, 0 QuantifiedInterpolants, 106880 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 6 PerfectInterpolantSequences, 25/71 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...