/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -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 0.1.25-177f698 [2020-08-21 16:33:46,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:33:46,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:33:46,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:33:46,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:33:46,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:33:46,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:33:46,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:33:46,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:33:46,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:33:46,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:33:46,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:33:46,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:33:46,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:33:46,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:33:46,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:33:46,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:33:46,207 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:33:46,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:33:46,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:33:46,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:33:46,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:33:46,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:33:46,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:33:46,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:33:46,227 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:33:46,227 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:33:46,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:33:46,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:33:46,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 16:33:46,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 16:33:46,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 16:33:46,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 16:33:46,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 16:33:46,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 16:33:46,238 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 16:33:46,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 16:33:46,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 16:33:46,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:33:46,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:33:46,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:33:46,241 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 [2020-08-21 16:33:46,263 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:33:46,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:33:46,265 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:33:46,265 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:33:46,265 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:33:46,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:33:46,266 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:33:46,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:33:46,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:33:46,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:33:46,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:33:46,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:33:46,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:33:46,267 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:33:46,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:33:46,267 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:33:46,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:33:46,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:33:46,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:33:46,268 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:33:46,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:33:46,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:33:46,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:33:46,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:33:46,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:33:46,270 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:33:46,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:33:46,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:33:46,270 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:33:46,270 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:33:46,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:33:46,624 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:33:46,628 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:33:46,632 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:33:46,634 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:33:46,635 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-08-21 16:33:46,702 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4da9d7edb/36b902c74f09426b9c849eb6c56d3bce/FLAGe7639b2cc [2020-08-21 16:33:47,271 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:33:47,271 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-08-21 16:33:47,293 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4da9d7edb/36b902c74f09426b9c849eb6c56d3bce/FLAGe7639b2cc [2020-08-21 16:33:47,563 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4da9d7edb/36b902c74f09426b9c849eb6c56d3bce [2020-08-21 16:33:47,573 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:33:47,575 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:33:47,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:33:47,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:33:47,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:33:47,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:33:47" (1/1) ... [2020-08-21 16:33:47,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ac45c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:33:47, skipping insertion in model container [2020-08-21 16:33:47,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:33:47" (1/1) ... [2020-08-21 16:33:47,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:33:47,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:33:48,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:33:48,138 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:33:48,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:33:48,278 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:33:48,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:33:48 WrapperNode [2020-08-21 16:33:48,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:33:48,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:33:48,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:33:48,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:33:48,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:33:48" (1/1) ... [2020-08-21 16:33:48,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:33:48" (1/1) ... [2020-08-21 16:33:48,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:33:48" (1/1) ... [2020-08-21 16:33:48,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:33:48" (1/1) ... [2020-08-21 16:33:48,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:33:48" (1/1) ... [2020-08-21 16:33:48,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:33:48" (1/1) ... [2020-08-21 16:33:48,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:33:48" (1/1) ... [2020-08-21 16:33:48,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:33:48,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:33:48,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:33:48,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:33:48,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:33:48" (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 [2020-08-21 16:33:48,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:33:48,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:33:48,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-21 16:33:48,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-21 16:33:48,422 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-21 16:33:48,423 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:33:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:33:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 16:33:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-21 16:33:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-21 16:33:48,424 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-21 16:33:48,424 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-21 16:33:48,424 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-21 16:33:48,424 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-21 16:33:48,424 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-21 16:33:48,425 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-21 16:33:48,425 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-21 16:33:48,425 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-21 16:33:48,425 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-21 16:33:48,425 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-21 16:33:48,426 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-21 16:33:48,426 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-21 16:33:48,426 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-21 16:33:48,426 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-21 16:33:48,426 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-21 16:33:48,427 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-21 16:33:48,427 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-21 16:33:48,427 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-21 16:33:48,427 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-21 16:33:48,427 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-21 16:33:48,427 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-21 16:33:48,428 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-21 16:33:48,428 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-21 16:33:48,428 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-21 16:33:48,428 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-21 16:33:48,428 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-21 16:33:48,429 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-21 16:33:48,429 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-21 16:33:48,429 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-21 16:33:48,429 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-21 16:33:48,429 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-21 16:33:48,430 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-21 16:33:48,430 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-21 16:33:48,430 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-21 16:33:48,430 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-21 16:33:48,430 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-21 16:33:48,430 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-21 16:33:48,430 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-21 16:33:48,431 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-21 16:33:48,431 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-21 16:33:48,431 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-21 16:33:48,431 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-21 16:33:48,431 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-21 16:33:48,431 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-21 16:33:48,432 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-21 16:33:48,432 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-21 16:33:48,432 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-21 16:33:48,432 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-21 16:33:48,432 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-21 16:33:48,432 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-21 16:33:48,433 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 16:33:48,433 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 16:33:48,433 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 16:33:48,433 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 16:33:48,433 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-21 16:33:48,433 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-21 16:33:48,433 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 16:33:48,434 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-21 16:33:48,434 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-21 16:33:48,434 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 16:33:48,434 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-21 16:33:48,434 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-21 16:33:48,434 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-21 16:33:48,435 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 16:33:48,435 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-21 16:33:48,436 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-21 16:33:48,436 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-21 16:33:48,437 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-21 16:33:48,437 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-21 16:33:48,437 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-21 16:33:48,437 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-21 16:33:48,437 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-21 16:33:48,438 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-21 16:33:48,438 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-21 16:33:48,438 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-21 16:33:48,438 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-21 16:33:48,439 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-21 16:33:48,439 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-21 16:33:48,439 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-21 16:33:48,439 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-21 16:33:48,439 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-21 16:33:48,439 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-21 16:33:48,439 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-21 16:33:48,440 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-21 16:33:48,440 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-21 16:33:48,440 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-21 16:33:48,440 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-21 16:33:48,440 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-21 16:33:48,440 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-21 16:33:48,440 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-21 16:33:48,441 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-21 16:33:48,441 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-21 16:33:48,441 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-21 16:33:48,441 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-21 16:33:48,441 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-21 16:33:48,441 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-21 16:33:48,441 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-21 16:33:48,442 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-21 16:33:48,442 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-21 16:33:48,442 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-21 16:33:48,442 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-21 16:33:48,442 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-21 16:33:48,442 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-21 16:33:48,442 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-21 16:33:48,443 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:33:48,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 16:33:48,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 16:33:48,444 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 16:33:48,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 16:33:48,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 16:33:48,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 16:33:48,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:33:48,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:33:48,817 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-21 16:33:49,092 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:33:49,092 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-08-21 16:33:49,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:33:49 BoogieIcfgContainer [2020-08-21 16:33:49,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:33:49,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:33:49,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:33:49,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:33:49,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:33:47" (1/3) ... [2020-08-21 16:33:49,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c34389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:33:49, skipping insertion in model container [2020-08-21 16:33:49,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:33:48" (2/3) ... [2020-08-21 16:33:49,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c34389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:33:49, skipping insertion in model container [2020-08-21 16:33:49,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:33:49" (3/3) ... [2020-08-21 16:33:49,110 INFO L109 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2020-08-21 16:33:49,122 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:33:49,130 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:33:49,145 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:33:49,168 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:33:49,168 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:33:49,168 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:33:49,168 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:33:49,168 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:33:49,169 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:33:49,169 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:33:49,169 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:33:49,186 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-08-21 16:33:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 16:33:49,194 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:33:49,195 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] [2020-08-21 16:33:49,196 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:33:49,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:33:49,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1575706012, now seen corresponding path program 1 times [2020-08-21 16:33:49,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:33:49,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172607373] [2020-08-21 16:33:49,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:33:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:49,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:33:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:33:49,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172607373] [2020-08-21 16:33:49,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:33:49,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:33:49,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805789388] [2020-08-21 16:33:49,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:33:49,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:33:49,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:33:49,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:33:49,494 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 3 states. [2020-08-21 16:33:49,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:33:49,741 INFO L93 Difference]: Finished difference Result 108 states and 166 transitions. [2020-08-21 16:33:49,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:33:49,744 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 16:33:49,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:33:49,757 INFO L225 Difference]: With dead ends: 108 [2020-08-21 16:33:49,757 INFO L226 Difference]: Without dead ends: 47 [2020-08-21 16:33:49,762 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 [2020-08-21 16:33:49,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-21 16:33:49,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-08-21 16:33:49,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-21 16:33:49,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2020-08-21 16:33:49,802 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 20 [2020-08-21 16:33:49,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:33:49,802 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2020-08-21 16:33:49,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:33:49,803 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2020-08-21 16:33:49,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 16:33:49,804 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:33:49,804 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] [2020-08-21 16:33:49,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:33:49,805 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:33:49,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:33:49,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1627887593, now seen corresponding path program 1 times [2020-08-21 16:33:49,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:33:49,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563174544] [2020-08-21 16:33:49,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:33:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:49,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:33:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:33:49,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563174544] [2020-08-21 16:33:49,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:33:49,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 16:33:49,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362801369] [2020-08-21 16:33:49,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 16:33:49,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:33:49,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 16:33:49,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:33:49,915 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand 4 states. [2020-08-21 16:33:50,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:33:50,067 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2020-08-21 16:33:50,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 16:33:50,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-21 16:33:50,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:33:50,071 INFO L225 Difference]: With dead ends: 75 [2020-08-21 16:33:50,071 INFO L226 Difference]: Without dead ends: 55 [2020-08-21 16:33:50,072 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 [2020-08-21 16:33:50,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-21 16:33:50,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-08-21 16:33:50,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-21 16:33:50,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 77 transitions. [2020-08-21 16:33:50,082 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 77 transitions. Word has length 25 [2020-08-21 16:33:50,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:33:50,083 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 77 transitions. [2020-08-21 16:33:50,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 16:33:50,083 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 77 transitions. [2020-08-21 16:33:50,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 16:33:50,085 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:33:50,085 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] [2020-08-21 16:33:50,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:33:50,085 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:33:50,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:33:50,086 INFO L82 PathProgramCache]: Analyzing trace with hash -164754602, now seen corresponding path program 1 times [2020-08-21 16:33:50,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:33:50,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490724047] [2020-08-21 16:33:50,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:33:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:50,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:33:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:33:50,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490724047] [2020-08-21 16:33:50,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:33:50,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 16:33:50,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742173061] [2020-08-21 16:33:50,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 16:33:50,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:33:50,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 16:33:50,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:33:50,179 INFO L87 Difference]: Start difference. First operand 55 states and 77 transitions. Second operand 4 states. [2020-08-21 16:33:50,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:33:50,331 INFO L93 Difference]: Finished difference Result 93 states and 131 transitions. [2020-08-21 16:33:50,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 16:33:50,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-08-21 16:33:50,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:33:50,334 INFO L225 Difference]: With dead ends: 93 [2020-08-21 16:33:50,335 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 16:33:50,335 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 [2020-08-21 16:33:50,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 16:33:50,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-21 16:33:50,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 16:33:50,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2020-08-21 16:33:50,351 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 31 [2020-08-21 16:33:50,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:33:50,352 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2020-08-21 16:33:50,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 16:33:50,356 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2020-08-21 16:33:50,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 16:33:50,357 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:33:50,358 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] [2020-08-21 16:33:50,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:33:50,358 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:33:50,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:33:50,359 INFO L82 PathProgramCache]: Analyzing trace with hash -982403052, now seen corresponding path program 1 times [2020-08-21 16:33:50,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:33:50,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122397057] [2020-08-21 16:33:50,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:33:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:50,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:33:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 16:33:50,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122397057] [2020-08-21 16:33:50,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:33:50,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 16:33:50,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515864462] [2020-08-21 16:33:50,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 16:33:50,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:33:50,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 16:33:50,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:33:50,507 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand 6 states. [2020-08-21 16:33:50,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:33:50,717 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2020-08-21 16:33:50,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 16:33:50,719 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-08-21 16:33:50,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:33:50,720 INFO L225 Difference]: With dead ends: 82 [2020-08-21 16:33:50,721 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 16:33:50,721 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 [2020-08-21 16:33:50,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 16:33:50,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2020-08-21 16:33:50,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-21 16:33:50,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 91 transitions. [2020-08-21 16:33:50,731 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 91 transitions. Word has length 31 [2020-08-21 16:33:50,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:33:50,732 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 91 transitions. [2020-08-21 16:33:50,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 16:33:50,732 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 91 transitions. [2020-08-21 16:33:50,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 16:33:50,733 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:33:50,734 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] [2020-08-21 16:33:50,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:33:50,734 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:33:50,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:33:50,735 INFO L82 PathProgramCache]: Analyzing trace with hash 852152367, now seen corresponding path program 1 times [2020-08-21 16:33:50,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:33:50,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511930896] [2020-08-21 16:33:50,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:33:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:50,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:33:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 16:33:50,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511930896] [2020-08-21 16:33:50,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:33:50,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 16:33:50,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229430435] [2020-08-21 16:33:50,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 16:33:50,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:33:50,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 16:33:50,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:33:50,864 INFO L87 Difference]: Start difference. First operand 66 states and 91 transitions. Second operand 6 states. [2020-08-21 16:33:51,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:33:51,083 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-08-21 16:33:51,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 16:33:51,084 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-21 16:33:51,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:33:51,085 INFO L225 Difference]: With dead ends: 84 [2020-08-21 16:33:51,085 INFO L226 Difference]: Without dead ends: 76 [2020-08-21 16:33:51,086 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 [2020-08-21 16:33:51,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-21 16:33:51,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2020-08-21 16:33:51,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 16:33:51,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2020-08-21 16:33:51,094 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 33 [2020-08-21 16:33:51,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:33:51,094 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 88 transitions. [2020-08-21 16:33:51,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 16:33:51,095 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 88 transitions. [2020-08-21 16:33:51,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 16:33:51,096 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:33:51,096 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] [2020-08-21 16:33:51,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 16:33:51,097 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:33:51,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:33:51,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1876855343, now seen corresponding path program 1 times [2020-08-21 16:33:51,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:33:51,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873227371] [2020-08-21 16:33:51,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:33:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:51,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:33:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 16:33:51,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873227371] [2020-08-21 16:33:51,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:33:51,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 16:33:51,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490054305] [2020-08-21 16:33:51,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 16:33:51,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:33:51,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 16:33:51,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:33:51,166 INFO L87 Difference]: Start difference. First operand 64 states and 88 transitions. Second operand 6 states. [2020-08-21 16:33:51,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:33:51,378 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-08-21 16:33:51,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 16:33:51,379 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-21 16:33:51,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:33:51,380 INFO L225 Difference]: With dead ends: 84 [2020-08-21 16:33:51,380 INFO L226 Difference]: Without dead ends: 73 [2020-08-21 16:33:51,381 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 [2020-08-21 16:33:51,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-21 16:33:51,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2020-08-21 16:33:51,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-21 16:33:51,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 84 transitions. [2020-08-21 16:33:51,391 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 84 transitions. Word has length 33 [2020-08-21 16:33:51,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:33:51,394 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 84 transitions. [2020-08-21 16:33:51,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 16:33:51,394 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 84 transitions. [2020-08-21 16:33:51,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-21 16:33:51,396 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:33:51,396 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] [2020-08-21 16:33:51,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 16:33:51,396 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:33:51,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:33:51,397 INFO L82 PathProgramCache]: Analyzing trace with hash -778946181, now seen corresponding path program 1 times [2020-08-21 16:33:51,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:33:51,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163104599] [2020-08-21 16:33:51,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:33:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:51,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:33:51,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 16:33:51,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163104599] [2020-08-21 16:33:51,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:33:51,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 16:33:51,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359574979] [2020-08-21 16:33:51,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:33:51,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:33:51,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:33:51,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:33:51,538 INFO L87 Difference]: Start difference. First operand 61 states and 84 transitions. Second operand 9 states. [2020-08-21 16:33:51,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:33:51,866 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-08-21 16:33:51,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 16:33:51,866 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-08-21 16:33:51,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:33:51,868 INFO L225 Difference]: With dead ends: 86 [2020-08-21 16:33:51,868 INFO L226 Difference]: Without dead ends: 80 [2020-08-21 16:33:51,869 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 [2020-08-21 16:33:51,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-21 16:33:51,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2020-08-21 16:33:51,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-08-21 16:33:51,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 92 transitions. [2020-08-21 16:33:51,876 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 92 transitions. Word has length 35 [2020-08-21 16:33:51,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:33:51,876 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 92 transitions. [2020-08-21 16:33:51,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:33:51,877 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 92 transitions. [2020-08-21 16:33:51,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-21 16:33:51,878 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:33:51,878 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] [2020-08-21 16:33:51,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 16:33:51,878 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:33:51,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:33:51,879 INFO L82 PathProgramCache]: Analyzing trace with hash 84455483, now seen corresponding path program 1 times [2020-08-21 16:33:51,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:33:51,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009427771] [2020-08-21 16:33:51,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:33:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:51,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:33:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 16:33:52,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009427771] [2020-08-21 16:33:52,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:33:52,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 16:33:52,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263050094] [2020-08-21 16:33:52,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:33:52,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:33:52,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:33:52,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:33:52,026 INFO L87 Difference]: Start difference. First operand 68 states and 92 transitions. Second operand 9 states. [2020-08-21 16:33:52,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:33:52,386 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2020-08-21 16:33:52,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 16:33:52,386 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-08-21 16:33:52,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:33:52,388 INFO L225 Difference]: With dead ends: 95 [2020-08-21 16:33:52,388 INFO L226 Difference]: Without dead ends: 91 [2020-08-21 16:33:52,388 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 [2020-08-21 16:33:52,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-21 16:33:52,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2020-08-21 16:33:52,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 16:33:52,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 106 transitions. [2020-08-21 16:33:52,395 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 106 transitions. Word has length 35 [2020-08-21 16:33:52,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:33:52,396 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 106 transitions. [2020-08-21 16:33:52,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:33:52,396 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 106 transitions. [2020-08-21 16:33:52,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 16:33:52,397 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:33:52,397 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] [2020-08-21 16:33:52,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 16:33:52,398 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:33:52,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:33:52,398 INFO L82 PathProgramCache]: Analyzing trace with hash -169587242, now seen corresponding path program 1 times [2020-08-21 16:33:52,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:33:52,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227698282] [2020-08-21 16:33:52,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:33:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:52,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:33:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 16:33:52,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227698282] [2020-08-21 16:33:52,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:33:52,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 16:33:52,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059353577] [2020-08-21 16:33:52,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 16:33:52,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:33:52,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 16:33:52,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:33:52,623 INFO L87 Difference]: Start difference. First operand 79 states and 106 transitions. Second operand 10 states. [2020-08-21 16:33:53,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:33:53,089 INFO L93 Difference]: Finished difference Result 99 states and 128 transitions. [2020-08-21 16:33:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 16:33:53,090 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-08-21 16:33:53,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:33:53,091 INFO L225 Difference]: With dead ends: 99 [2020-08-21 16:33:53,091 INFO L226 Difference]: Without dead ends: 95 [2020-08-21 16:33:53,092 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 [2020-08-21 16:33:53,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-21 16:33:53,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2020-08-21 16:33:53,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-21 16:33:53,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2020-08-21 16:33:53,098 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 37 [2020-08-21 16:33:53,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:33:53,099 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2020-08-21 16:33:53,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 16:33:53,099 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2020-08-21 16:33:53,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-21 16:33:53,100 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:33:53,100 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] [2020-08-21 16:33:53,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 16:33:53,101 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:33:53,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:33:53,101 INFO L82 PathProgramCache]: Analyzing trace with hash 284097905, now seen corresponding path program 1 times [2020-08-21 16:33:53,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:33:53,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587317203] [2020-08-21 16:33:53,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:33:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:53,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:33:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 16:33:53,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587317203] [2020-08-21 16:33:53,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:33:53,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 16:33:53,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831068419] [2020-08-21 16:33:53,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 16:33:53,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:33:53,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 16:33:53,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:33:53,288 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand 10 states. [2020-08-21 16:33:53,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:33:53,680 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2020-08-21 16:33:53,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 16:33:53,681 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-08-21 16:33:53,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:33:53,682 INFO L225 Difference]: With dead ends: 101 [2020-08-21 16:33:53,683 INFO L226 Difference]: Without dead ends: 91 [2020-08-21 16:33:53,684 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 [2020-08-21 16:33:53,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-21 16:33:53,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 74. [2020-08-21 16:33:53,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-21 16:33:53,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2020-08-21 16:33:53,690 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 39 [2020-08-21 16:33:53,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:33:53,690 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2020-08-21 16:33:53,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 16:33:53,690 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2020-08-21 16:33:53,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-21 16:33:53,691 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:33:53,692 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] [2020-08-21 16:33:53,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 16:33:53,692 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:33:53,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:33:53,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1308800881, now seen corresponding path program 2 times [2020-08-21 16:33:53,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:33:53,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386577463] [2020-08-21 16:33:53,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:33:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:53,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:33:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 16:33:53,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386577463] [2020-08-21 16:33:53,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:33:53,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 16:33:53,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380160897] [2020-08-21 16:33:53,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 16:33:53,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:33:53,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 16:33:53,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:33:53,882 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand 10 states. [2020-08-21 16:33:54,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:33:54,284 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2020-08-21 16:33:54,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 16:33:54,285 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-08-21 16:33:54,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:33:54,286 INFO L225 Difference]: With dead ends: 94 [2020-08-21 16:33:54,286 INFO L226 Difference]: Without dead ends: 81 [2020-08-21 16:33:54,288 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 [2020-08-21 16:33:54,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-21 16:33:54,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2020-08-21 16:33:54,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 16:33:54,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2020-08-21 16:33:54,294 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 39 [2020-08-21 16:33:54,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:33:54,295 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2020-08-21 16:33:54,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 16:33:54,295 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2020-08-21 16:33:54,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-21 16:33:54,303 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:33:54,303 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] [2020-08-21 16:33:54,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 16:33:54,303 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:33:54,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:33:54,304 INFO L82 PathProgramCache]: Analyzing trace with hash -315248798, now seen corresponding path program 2 times [2020-08-21 16:33:54,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:33:54,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30107213] [2020-08-21 16:33:54,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:33:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:54,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:33:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 16:33:54,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30107213] [2020-08-21 16:33:54,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:33:54,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 16:33:54,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198482416] [2020-08-21 16:33:54,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 16:33:54,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:33:54,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 16:33:54,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-21 16:33:54,518 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand 13 states. [2020-08-21 16:33:55,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:33:55,070 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2020-08-21 16:33:55,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 16:33:55,070 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-08-21 16:33:55,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:33:55,071 INFO L225 Difference]: With dead ends: 94 [2020-08-21 16:33:55,072 INFO L226 Difference]: Without dead ends: 90 [2020-08-21 16:33:55,072 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 [2020-08-21 16:33:55,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-21 16:33:55,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 80. [2020-08-21 16:33:55,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-21 16:33:55,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2020-08-21 16:33:55,077 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 39 [2020-08-21 16:33:55,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:33:55,078 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2020-08-21 16:33:55,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 16:33:55,078 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2020-08-21 16:33:55,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-21 16:33:55,079 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:33:55,079 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] [2020-08-21 16:33:55,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 16:33:55,079 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:33:55,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:33:55,080 INFO L82 PathProgramCache]: Analyzing trace with hash -15546846, now seen corresponding path program 1 times [2020-08-21 16:33:55,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:33:55,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969425382] [2020-08-21 16:33:55,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:33:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:55,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:33:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:55,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 16:33:55,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969425382] [2020-08-21 16:33:55,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:33:55,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 16:33:55,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640029651] [2020-08-21 16:33:55,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 16:33:55,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:33:55,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 16:33:55,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-21 16:33:55,287 INFO L87 Difference]: Start difference. First operand 80 states and 106 transitions. Second operand 13 states. [2020-08-21 16:33:55,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:33:55,929 INFO L93 Difference]: Finished difference Result 107 states and 137 transitions. [2020-08-21 16:33:55,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 16:33:55,929 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-08-21 16:33:55,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:33:55,930 INFO L225 Difference]: With dead ends: 107 [2020-08-21 16:33:55,931 INFO L226 Difference]: Without dead ends: 103 [2020-08-21 16:33:55,932 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 [2020-08-21 16:33:55,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-08-21 16:33:55,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-08-21 16:33:55,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-21 16:33:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 109 transitions. [2020-08-21 16:33:55,937 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 109 transitions. Word has length 39 [2020-08-21 16:33:55,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:33:55,937 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 109 transitions. [2020-08-21 16:33:55,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 16:33:55,937 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 109 transitions. [2020-08-21 16:33:55,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 16:33:55,938 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:33:55,938 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] [2020-08-21 16:33:55,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 16:33:55,939 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:33:55,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:33:55,939 INFO L82 PathProgramCache]: Analyzing trace with hash 2037263357, now seen corresponding path program 1 times [2020-08-21 16:33:55,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:33:55,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827822934] [2020-08-21 16:33:55,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:33:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:56,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:33:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 16:33:56,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827822934] [2020-08-21 16:33:56,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:33:56,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 16:33:56,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376237637] [2020-08-21 16:33:56,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 16:33:56,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:33:56,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 16:33:56,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-21 16:33:56,128 INFO L87 Difference]: Start difference. First operand 82 states and 109 transitions. Second operand 13 states. [2020-08-21 16:33:56,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:33:56,672 INFO L93 Difference]: Finished difference Result 109 states and 139 transitions. [2020-08-21 16:33:56,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 16:33:56,672 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-08-21 16:33:56,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:33:56,673 INFO L225 Difference]: With dead ends: 109 [2020-08-21 16:33:56,673 INFO L226 Difference]: Without dead ends: 101 [2020-08-21 16:33:56,674 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 [2020-08-21 16:33:56,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-21 16:33:56,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2020-08-21 16:33:56,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-21 16:33:56,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2020-08-21 16:33:56,679 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 41 [2020-08-21 16:33:56,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:33:56,680 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2020-08-21 16:33:56,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 16:33:56,680 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2020-08-21 16:33:56,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 16:33:56,681 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:33:56,681 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] [2020-08-21 16:33:56,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 16:33:56,681 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:33:56,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:33:56,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1233000963, now seen corresponding path program 3 times [2020-08-21 16:33:56,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:33:56,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37329628] [2020-08-21 16:33:56,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:33:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:57,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:33:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 16:33:57,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37329628] [2020-08-21 16:33:57,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:33:57,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 16:33:57,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840236974] [2020-08-21 16:33:57,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 16:33:57,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:33:57,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 16:33:57,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-21 16:33:57,049 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand 13 states. [2020-08-21 16:33:57,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:33:57,826 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2020-08-21 16:33:57,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 16:33:57,826 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-08-21 16:33:57,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:33:57,828 INFO L225 Difference]: With dead ends: 116 [2020-08-21 16:33:57,828 INFO L226 Difference]: Without dead ends: 110 [2020-08-21 16:33:57,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-08-21 16:33:57,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-21 16:33:57,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2020-08-21 16:33:57,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-21 16:33:57,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 128 transitions. [2020-08-21 16:33:57,835 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 128 transitions. Word has length 41 [2020-08-21 16:33:57,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:33:57,835 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 128 transitions. [2020-08-21 16:33:57,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 16:33:57,836 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 128 transitions. [2020-08-21 16:33:57,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 16:33:57,836 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:33:57,836 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] [2020-08-21 16:33:57,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 16:33:57,837 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:33:57,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:33:57,837 INFO L82 PathProgramCache]: Analyzing trace with hash -2006936899, now seen corresponding path program 1 times [2020-08-21 16:33:57,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:33:57,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635087902] [2020-08-21 16:33:57,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:33:57,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 16:33:57,862 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 16:33:57,862 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 16:33:57,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 16:33:57,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:33:57 BoogieIcfgContainer [2020-08-21 16:33:57,886 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:33:57,889 INFO L168 Benchmark]: Toolchain (without parser) took 10312.89 ms. Allocated memory was 139.5 MB in the beginning and 323.0 MB in the end (delta: 183.5 MB). Free memory was 100.9 MB in the beginning and 185.1 MB in the end (delta: -84.2 MB). Peak memory consumption was 99.3 MB. Max. memory is 7.1 GB. [2020-08-21 16:33:57,889 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 16:33:57,891 INFO L168 Benchmark]: CACSL2BoogieTranslator took 702.70 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 100.7 MB in the beginning and 166.9 MB in the end (delta: -66.2 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-08-21 16:33:57,891 INFO L168 Benchmark]: Boogie Preprocessor took 82.18 ms. Allocated memory is still 201.9 MB. Free memory was 166.9 MB in the beginning and 163.6 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-08-21 16:33:57,892 INFO L168 Benchmark]: RCFGBuilder took 737.22 ms. Allocated memory is still 201.9 MB. Free memory was 163.6 MB in the beginning and 106.8 MB in the end (delta: 56.8 MB). Peak memory consumption was 56.8 MB. Max. memory is 7.1 GB. [2020-08-21 16:33:57,893 INFO L168 Benchmark]: TraceAbstraction took 8785.44 ms. Allocated memory was 201.9 MB in the beginning and 323.0 MB in the end (delta: 121.1 MB). Free memory was 106.8 MB in the beginning and 185.1 MB in the end (delta: -78.3 MB). Peak memory consumption was 42.8 MB. Max. memory is 7.1 GB. [2020-08-21 16:33:57,896 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 702.70 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 100.7 MB in the beginning and 166.9 MB in the end (delta: -66.2 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 82.18 ms. Allocated memory is still 201.9 MB. Free memory was 166.9 MB in the beginning and 163.6 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 737.22 ms. Allocated memory is still 201.9 MB. Free memory was 163.6 MB in the beginning and 106.8 MB in the end (delta: 56.8 MB). Peak memory consumption was 56.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8785.44 ms. Allocated memory was 201.9 MB in the beginning and 323.0 MB in the end (delta: 121.1 MB). Free memory was 106.8 MB in the beginning and 185.1 MB in the end (delta: -78.3 MB). Peak memory consumption was 42.8 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: 8.7s, OverallIterations: 16, TraceHistogramMax: 3, AutomataDifference: 5.7s, 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, 0.2s 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...