/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 13:29:53,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 13:29:53,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 13:29:53,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 13:29:53,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 13:29:53,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 13:29:53,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 13:29:53,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 13:29:53,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 13:29:53,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 13:29:53,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 13:29:53,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 13:29:53,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 13:29:53,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 13:29:53,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 13:29:53,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 13:29:53,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 13:29:53,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 13:29:53,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 13:29:53,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 13:29:53,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 13:29:53,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 13:29:53,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 13:29:53,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 13:29:53,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 13:29:53,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 13:29:53,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 13:29:53,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 13:29:53,255 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-23 13:29:53,286 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 13:29:53,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 13:29:53,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 13:29:53,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 13:29:53,289 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 13:29:53,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 13:29:53,290 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 13:29:53,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 13:29:53,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 13:29:53,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 13:29:53,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 13:29:53,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 13:29:53,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 13:29:53,291 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 13:29:53,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 13:29:53,292 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 13:29:53,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 13:29:53,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 13:29:53,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 13:29:53,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 13:29:53,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:29:53,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 13:29:53,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 13:29:53,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 13:29:53,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 13:29:53,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 13:29:53,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 13:29:53,294 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 13:29:53,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 13:29:53,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 13:29:53,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 13:29:53,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 13:29:53,799 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 13:29:53,801 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 13:29:53,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2021-02-23 13:29:53,886 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcec7b19f/1160a892635144659a09bdf5d2eb2b8c/FLAGd70886756 [2021-02-23 13:29:54,648 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 13:29:54,649 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2021-02-23 13:29:54,657 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcec7b19f/1160a892635144659a09bdf5d2eb2b8c/FLAGd70886756 [2021-02-23 13:29:55,027 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcec7b19f/1160a892635144659a09bdf5d2eb2b8c [2021-02-23 13:29:55,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 13:29:55,044 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 13:29:55,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 13:29:55,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 13:29:55,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 13:29:55,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:29:55" (1/1) ... [2021-02-23 13:29:55,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ee5a57e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:29:55, skipping insertion in model container [2021-02-23 13:29:55,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:29:55" (1/1) ... [2021-02-23 13:29:55,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 13:29:55,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 13:29:55,243 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c[771,784] [2021-02-23 13:29:55,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:29:55,258 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 13:29:55,275 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c[771,784] [2021-02-23 13:29:55,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:29:55,292 INFO L208 MainTranslator]: Completed translation [2021-02-23 13:29:55,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:29:55 WrapperNode [2021-02-23 13:29:55,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 13:29:55,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 13:29:55,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 13:29:55,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 13:29:55,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:29:55" (1/1) ... [2021-02-23 13:29:55,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:29:55" (1/1) ... [2021-02-23 13:29:55,317 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:29:55" (1/1) ... [2021-02-23 13:29:55,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:29:55" (1/1) ... [2021-02-23 13:29:55,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:29:55" (1/1) ... [2021-02-23 13:29:55,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:29:55" (1/1) ... [2021-02-23 13:29:55,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:29:55" (1/1) ... [2021-02-23 13:29:55,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 13:29:55,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 13:29:55,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 13:29:55,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 13:29:55,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:29:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:29:55,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 13:29:55,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 13:29:55,434 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 13:29:55,434 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-02-23 13:29:55,434 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2021-02-23 13:29:55,435 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 13:29:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-23 13:29:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 13:29:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 13:29:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 13:29:55,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 13:29:55,436 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-02-23 13:29:55,436 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2021-02-23 13:29:55,436 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 13:29:55,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 13:29:55,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 13:29:55,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 13:29:55,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 13:29:55,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 13:29:55,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 13:29:55,684 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 13:29:55,685 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 13:29:55,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:29:55 BoogieIcfgContainer [2021-02-23 13:29:55,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 13:29:55,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 13:29:55,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 13:29:55,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 13:29:55,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 01:29:55" (1/3) ... [2021-02-23 13:29:55,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e1f5588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:29:55, skipping insertion in model container [2021-02-23 13:29:55,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:29:55" (2/3) ... [2021-02-23 13:29:55,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e1f5588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:29:55, skipping insertion in model container [2021-02-23 13:29:55,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:29:55" (3/3) ... [2021-02-23 13:29:55,699 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2021-02-23 13:29:55,707 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 13:29:55,713 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 13:29:55,807 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 13:29:55,847 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 13:29:55,847 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 13:29:55,847 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 13:29:55,848 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 13:29:55,848 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 13:29:55,848 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 13:29:55,849 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 13:29:55,849 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 13:29:55,875 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2021-02-23 13:29:55,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-23 13:29:55,890 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:29:55,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:29:55,895 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:29:55,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:29:55,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1015500806, now seen corresponding path program 1 times [2021-02-23 13:29:55,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:29:55,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220489606] [2021-02-23 13:29:55,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:29:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:29:56,293 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:56,295 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:56,296 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:56,297 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:29:56,318 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:56,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:29:56,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:56,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:56,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:29:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:29:56,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:56,452 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:56,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-23 13:29:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:29:56,487 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:56,488 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:56,499 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:56,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:29:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:29:56,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220489606] [2021-02-23 13:29:56,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:29:56,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 13:29:56,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104279654] [2021-02-23 13:29:56,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 13:29:56,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:29:56,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 13:29:56,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 13:29:56,560 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 6 states. [2021-02-23 13:29:56,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:29:56,834 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-02-23 13:29:56,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 13:29:56,836 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2021-02-23 13:29:56,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:29:56,847 INFO L225 Difference]: With dead ends: 41 [2021-02-23 13:29:56,847 INFO L226 Difference]: Without dead ends: 27 [2021-02-23 13:29:56,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-23 13:29:56,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-02-23 13:29:56,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-02-23 13:29:56,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-02-23 13:29:56,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-02-23 13:29:56,910 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2021-02-23 13:29:56,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:29:56,910 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-02-23 13:29:56,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 13:29:56,911 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-02-23 13:29:56,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 13:29:56,913 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:29:56,913 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] [2021-02-23 13:29:56,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 13:29:56,914 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:29:56,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:29:56,915 INFO L82 PathProgramCache]: Analyzing trace with hash 287432368, now seen corresponding path program 1 times [2021-02-23 13:29:56,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:29:56,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306836047] [2021-02-23 13:29:56,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:29:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:29:56,970 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:56,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:56,972 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:56,973 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:56,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:29:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:29:57,012 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:57,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:57,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-23 13:29:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:29:57,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:57,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:57,040 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:57,041 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:29:57,058 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 13:29:57,060 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 13:29:57,085 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:57,086 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:57,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 13:29:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:29:57,101 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:57,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:57,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:57,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:29:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:29:57,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306836047] [2021-02-23 13:29:57,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:29:57,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 13:29:57,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999208219] [2021-02-23 13:29:57,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 13:29:57,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:29:57,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 13:29:57,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 13:29:57,124 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2021-02-23 13:29:57,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:29:57,357 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-02-23 13:29:57,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 13:29:57,358 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-02-23 13:29:57,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:29:57,360 INFO L225 Difference]: With dead ends: 45 [2021-02-23 13:29:57,360 INFO L226 Difference]: Without dead ends: 33 [2021-02-23 13:29:57,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-23 13:29:57,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-02-23 13:29:57,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-02-23 13:29:57,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-02-23 13:29:57,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-02-23 13:29:57,374 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 21 [2021-02-23 13:29:57,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:29:57,374 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-02-23 13:29:57,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 13:29:57,375 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-02-23 13:29:57,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 13:29:57,376 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:29:57,376 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] [2021-02-23 13:29:57,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 13:29:57,377 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:29:57,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:29:57,378 INFO L82 PathProgramCache]: Analyzing trace with hash 316061519, now seen corresponding path program 1 times [2021-02-23 13:29:57,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:29:57,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821089361] [2021-02-23 13:29:57,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:29:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:29:57,422 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:57,423 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:57,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:57,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:29:57,433 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 13:29:57,434 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 13:29:57,453 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:57,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:57,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:29:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:29:57,491 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:57,492 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:57,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-23 13:29:57,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:29:57,510 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:57,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:57,513 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:57,514 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:29:57,525 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:57,526 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:29:57,539 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:57,540 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:29:57,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 13:29:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:29:57,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:57,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:57,576 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:57,576 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:29:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:29:57,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821089361] [2021-02-23 13:29:57,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:29:57,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 13:29:57,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636664420] [2021-02-23 13:29:57,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 13:29:57,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:29:57,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 13:29:57,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-23 13:29:57,604 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 9 states. [2021-02-23 13:29:57,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:29:57,974 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-02-23 13:29:57,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 13:29:57,975 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2021-02-23 13:29:57,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:29:57,979 INFO L225 Difference]: With dead ends: 37 [2021-02-23 13:29:57,979 INFO L226 Difference]: Without dead ends: 33 [2021-02-23 13:29:57,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-23 13:29:57,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-02-23 13:29:57,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-02-23 13:29:57,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-02-23 13:29:57,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-02-23 13:29:57,998 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 21 [2021-02-23 13:29:57,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:29:57,998 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-02-23 13:29:57,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 13:29:57,999 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-02-23 13:29:58,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-23 13:29:58,001 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:29:58,001 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] [2021-02-23 13:29:58,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 13:29:58,002 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:29:58,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:29:58,003 INFO L82 PathProgramCache]: Analyzing trace with hash -987405527, now seen corresponding path program 1 times [2021-02-23 13:29:58,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:29:58,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076258219] [2021-02-23 13:29:58,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:29:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:29:58,054 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:58,055 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:58,056 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:58,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:58,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:29:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:29:58,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:58,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:58,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-23 13:29:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:29:58,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:58,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:58,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:58,107 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:58,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 13:29:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:29:58,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:58,131 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:58,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:58,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:29:58,146 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 13:29:58,148 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 13:29:58,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:58,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:58,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 13:29:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:29:58,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:58,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:58,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:58,205 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:29:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-23 13:29:58,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076258219] [2021-02-23 13:29:58,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:29:58,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 13:29:58,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900091847] [2021-02-23 13:29:58,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 13:29:58,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:29:58,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 13:29:58,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 13:29:58,228 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2021-02-23 13:29:58,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:29:58,460 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-02-23 13:29:58,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 13:29:58,460 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2021-02-23 13:29:58,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:29:58,462 INFO L225 Difference]: With dead ends: 49 [2021-02-23 13:29:58,462 INFO L226 Difference]: Without dead ends: 37 [2021-02-23 13:29:58,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-23 13:29:58,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-23 13:29:58,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-02-23 13:29:58,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-02-23 13:29:58,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-02-23 13:29:58,472 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2021-02-23 13:29:58,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:29:58,472 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-02-23 13:29:58,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 13:29:58,472 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-02-23 13:29:58,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-23 13:29:58,473 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:29:58,474 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] [2021-02-23 13:29:58,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 13:29:58,474 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:29:58,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:29:58,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1183919032, now seen corresponding path program 1 times [2021-02-23 13:29:58,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:29:58,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952908434] [2021-02-23 13:29:58,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:29:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:29:58,507 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:58,508 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:58,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:58,509 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:58,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:29:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:29:58,537 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:58,537 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:58,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-23 13:29:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:29:58,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:58,555 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:58,556 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:58,557 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:29:58,566 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 13:29:58,567 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 13:29:58,587 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:58,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:58,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 13:29:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:29:58,599 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:58,600 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:58,601 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:58,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:29:58,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:58,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:29:58,623 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:58,624 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:29:58,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 13:29:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:29:58,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:58,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:29:58,644 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:29:58,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:29:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-23 13:29:58,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952908434] [2021-02-23 13:29:58,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:29:58,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 13:29:58,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440085935] [2021-02-23 13:29:58,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 13:29:58,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:29:58,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 13:29:58,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-23 13:29:58,663 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2021-02-23 13:29:59,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:29:59,064 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-02-23 13:29:59,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 13:29:59,065 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2021-02-23 13:29:59,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:29:59,066 INFO L225 Difference]: With dead ends: 53 [2021-02-23 13:29:59,066 INFO L226 Difference]: Without dead ends: 41 [2021-02-23 13:29:59,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-23 13:29:59,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-02-23 13:29:59,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-02-23 13:29:59,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-23 13:29:59,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-02-23 13:29:59,075 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 28 [2021-02-23 13:29:59,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:29:59,076 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-02-23 13:29:59,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 13:29:59,076 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-02-23 13:29:59,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-23 13:29:59,077 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:29:59,077 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] [2021-02-23 13:29:59,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 13:29:59,078 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:29:59,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:29:59,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1155289881, now seen corresponding path program 1 times [2021-02-23 13:29:59,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:29:59,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641312958] [2021-02-23 13:29:59,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:29:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 13:29:59,095 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 13:29:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 13:29:59,108 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 13:29:59,135 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-23 13:29:59,136 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 13:29:59,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 13:29:59,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 01:29:59 BoogieIcfgContainer [2021-02-23 13:29:59,180 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 13:29:59,182 INFO L168 Benchmark]: Toolchain (without parser) took 4149.06 ms. Allocated memory was 175.1 MB in the beginning and 225.4 MB in the end (delta: 50.3 MB). Free memory was 149.7 MB in the beginning and 103.4 MB in the end (delta: 46.3 MB). Peak memory consumption was 97.5 MB. Max. memory is 8.0 GB. [2021-02-23 13:29:59,182 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 175.1 MB. Free memory was 146.0 MB in the beginning and 145.9 MB in the end (delta: 101.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 13:29:59,183 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.23 ms. Allocated memory is still 175.1 MB. Free memory was 148.6 MB in the beginning and 139.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 13:29:59,183 INFO L168 Benchmark]: Boogie Preprocessor took 34.61 ms. Allocated memory is still 175.1 MB. Free memory was 139.3 MB in the beginning and 137.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 13:29:59,184 INFO L168 Benchmark]: RCFGBuilder took 357.39 ms. Allocated memory is still 175.1 MB. Free memory was 137.8 MB in the beginning and 123.3 MB in the end (delta: 14.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-23 13:29:59,185 INFO L168 Benchmark]: TraceAbstraction took 3491.18 ms. Allocated memory was 175.1 MB in the beginning and 225.4 MB in the end (delta: 50.3 MB). Free memory was 122.7 MB in the beginning and 103.4 MB in the end (delta: 19.3 MB). Peak memory consumption was 70.3 MB. Max. memory is 8.0 GB. [2021-02-23 13:29:59,187 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 175.1 MB. Free memory was 146.0 MB in the beginning and 145.9 MB in the end (delta: 101.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 247.23 ms. Allocated memory is still 175.1 MB. Free memory was 148.6 MB in the beginning and 139.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.61 ms. Allocated memory is still 175.1 MB. Free memory was 139.3 MB in the beginning and 137.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 357.39 ms. Allocated memory is still 175.1 MB. Free memory was 137.8 MB in the beginning and 123.3 MB in the end (delta: 14.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3491.18 ms. Allocated memory was 175.1 MB in the beginning and 225.4 MB in the end (delta: 50.3 MB). Free memory was 122.7 MB in the beginning and 103.4 MB in the end (delta: 19.3 MB). Peak memory consumption was 70.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 27]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L24] unsigned int input = __VERIFIER_nondet_uint(); [L25] CALL, EXPR id(input) VAL [\old(x)=2] [L10] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L11] CALL, EXPR id2(x-1) VAL [\old(x)=1] [L17] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L18] CALL, EXPR id(x-1) VAL [\old(x)=0] [L10] COND TRUE x==0 [L10] return 0; VAL [\old(x)=0, \result=0, x=0] [L18] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L18] unsigned int ret = id(x-1) + 1; [L19] COND FALSE !(ret > 3) [L20] return ret; VAL [\old(x)=1, \result=1, ret=1, x=1] [L11] RET, EXPR id2(x-1) VAL [\old(x)=2, id2(x-1)=1, x=2] [L11] unsigned int ret = id2(x-1) + 1; [L12] COND FALSE !(ret > 3) [L13] return ret; VAL [\old(x)=2, \result=2, ret=2, x=2] [L25] RET, EXPR id(input) VAL [id(input)=2, input=2] [L25] unsigned int result = id(input); [L26] COND TRUE result == 2 VAL [input=2, result=2] [L27] reach_error() VAL [input=2, result=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.2s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 123 SDtfs, 115 SDslu, 164 SDs, 0 SdLazy, 556 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 140 NumberOfCodeBlocks, 140 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 107 ConstructedInterpolants, 0 QuantifiedInterpolants, 9605 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 8/8 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...