/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-b7b32d2 [2021-02-21 16:03:57,380 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:03:57,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:03:57,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 16:03:57,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 16:03:57,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 16:03:57,433 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 16:03:57,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 16:03:57,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 16:03:57,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 16:03:57,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 16:03:57,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 16:03:57,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:03:57,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:03:57,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:03:57,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:03:57,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:03:57,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:03:57,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:03:57,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:03:57,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:03:57,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:03:57,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:03:57,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:03:57,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:03:57,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:03:57,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:03:57,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:03:57,502 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 [2021-02-21 16:03:57,541 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:03:57,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:03:57,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:03:57,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:03:57,544 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:03:57,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:03:57,545 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:03:57,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:03:57,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:03:57,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:03:57,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:03:57,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:03:57,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:03:57,548 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:03:57,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:03:57,549 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:03:57,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:03:57,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:03:57,549 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:03:57,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:03:57,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:03:57,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:03:57,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:03:57,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:03:57,551 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:03:57,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:03:57,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:03:57,551 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:03:57,552 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:03:58,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:03:58,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:03:58,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:03:58,085 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:03:58,086 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:03:58,087 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2021-02-21 16:03:58,183 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5040a2953/f589edc158944f3bb84f6bb6a4b83a1f/FLAGd7eb6857f [2021-02-21 16:03:58,889 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:03:58,890 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2021-02-21 16:03:58,898 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5040a2953/f589edc158944f3bb84f6bb6a4b83a1f/FLAGd7eb6857f [2021-02-21 16:03:59,227 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5040a2953/f589edc158944f3bb84f6bb6a4b83a1f [2021-02-21 16:03:59,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:03:59,250 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:03:59,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:03:59,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:03:59,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:03:59,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:03:59" (1/1) ... [2021-02-21 16:03:59,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61a30af5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:03:59, skipping insertion in model container [2021-02-21 16:03:59,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:03:59" (1/1) ... [2021-02-21 16:03:59,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:03:59,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:03:59,476 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] [2021-02-21 16:03:59,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:03:59,497 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:03:59,519 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] [2021-02-21 16:03:59,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:03:59,539 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:03:59,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:03:59 WrapperNode [2021-02-21 16:03:59,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:03:59,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:03:59,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:03:59,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:03:59,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:03:59" (1/1) ... [2021-02-21 16:03:59,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:03:59" (1/1) ... [2021-02-21 16:03:59,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:03:59" (1/1) ... [2021-02-21 16:03:59,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:03:59" (1/1) ... [2021-02-21 16:03:59,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:03:59" (1/1) ... [2021-02-21 16:03:59,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:03:59" (1/1) ... [2021-02-21 16:03:59,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:03:59" (1/1) ... [2021-02-21 16:03:59,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:03:59,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:03:59,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:03:59,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:03:59,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:03:59" (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 [2021-02-21 16:03:59,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:03:59,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:03:59,723 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:03:59,723 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-02-21 16:03:59,723 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2021-02-21 16:03:59,723 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:03:59,724 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-21 16:03:59,724 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:03:59,725 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:03:59,725 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:03:59,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:03:59,726 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-02-21 16:03:59,727 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2021-02-21 16:03:59,727 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:03:59,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:03:59,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:03:59,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:03:59,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:03:59,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:03:59,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:04:00,265 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:04:00,266 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 16:04:00,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:04:00 BoogieIcfgContainer [2021-02-21 16:04:00,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:04:00,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:04:00,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:04:00,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:04:00,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:03:59" (1/3) ... [2021-02-21 16:04:00,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65fce859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:04:00, skipping insertion in model container [2021-02-21 16:04:00,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:03:59" (2/3) ... [2021-02-21 16:04:00,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65fce859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:04:00, skipping insertion in model container [2021-02-21 16:04:00,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:04:00" (3/3) ... [2021-02-21 16:04:00,325 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2021-02-21 16:04:00,334 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:04:00,348 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:04:00,399 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:04:00,451 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:04:00,451 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:04:00,451 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:04:00,452 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:04:00,452 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:04:00,452 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:04:00,452 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:04:00,452 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:04:00,482 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2021-02-21 16:04:00,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-21 16:04:00,491 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:04:00,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:04:00,493 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:04:00,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:04:00,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1015500806, now seen corresponding path program 1 times [2021-02-21 16:04:00,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:04:00,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363699924] [2021-02-21 16:04:00,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:04:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:00,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:00,845 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:00,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:00,848 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:00,868 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:00,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:04:00,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:00,893 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:00,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:04:01,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:01,033 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:01,035 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:01,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-21 16:04:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:01,074 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:01,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:01,086 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:01,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:04:01,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:04:01,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363699924] [2021-02-21 16:04:01,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:04:01,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:04:01,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428729781] [2021-02-21 16:04:01,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:04:01,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:04:01,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:04:01,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:04:01,159 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 6 states. [2021-02-21 16:04:01,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:04:01,544 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-02-21 16:04:01,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 16:04:01,546 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2021-02-21 16:04:01,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:04:01,559 INFO L225 Difference]: With dead ends: 41 [2021-02-21 16:04:01,559 INFO L226 Difference]: Without dead ends: 27 [2021-02-21 16:04:01,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-21 16:04:01,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-02-21 16:04:01,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-02-21 16:04:01,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-02-21 16:04:01,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-02-21 16:04:01,623 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2021-02-21 16:04:01,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:04:01,623 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-02-21 16:04:01,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:04:01,624 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-02-21 16:04:01,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-21 16:04:01,626 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:04:01,626 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] [2021-02-21 16:04:01,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:04:01,627 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:04:01,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:04:01,628 INFO L82 PathProgramCache]: Analyzing trace with hash 287432368, now seen corresponding path program 1 times [2021-02-21 16:04:01,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:04:01,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002803302] [2021-02-21 16:04:01,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:04:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:01,699 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:01,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:01,702 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:01,704 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:01,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:04:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:01,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:01,778 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:01,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-21 16:04:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:01,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:01,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:01,829 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:01,830 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:04:01,843 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 16:04:01,848 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 16:04:01,871 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:01,872 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:01,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 16:04:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:01,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:01,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:01,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:01,887 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:04:01,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:04:01,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002803302] [2021-02-21 16:04:01,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:04:01,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:04:01,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829054962] [2021-02-21 16:04:01,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:04:01,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:04:01,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:04:01,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:04:01,905 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2021-02-21 16:04:02,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:04:02,157 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-02-21 16:04:02,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 16:04:02,157 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-02-21 16:04:02,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:04:02,159 INFO L225 Difference]: With dead ends: 45 [2021-02-21 16:04:02,159 INFO L226 Difference]: Without dead ends: 33 [2021-02-21 16:04:02,161 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 [2021-02-21 16:04:02,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-02-21 16:04:02,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-02-21 16:04:02,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-02-21 16:04:02,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-02-21 16:04:02,172 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 21 [2021-02-21 16:04:02,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:04:02,172 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-02-21 16:04:02,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:04:02,173 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-02-21 16:04:02,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-21 16:04:02,174 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:04:02,174 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] [2021-02-21 16:04:02,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:04:02,175 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:04:02,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:04:02,175 INFO L82 PathProgramCache]: Analyzing trace with hash 316061519, now seen corresponding path program 1 times [2021-02-21 16:04:02,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:04:02,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661325018] [2021-02-21 16:04:02,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:04:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:02,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:02,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:02,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:02,244 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:04:02,259 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 16:04:02,264 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 16:04:02,284 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:02,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:02,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:04:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:02,333 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:02,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:02,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-21 16:04:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:02,374 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:02,375 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:02,376 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:02,377 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:04:02,393 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:02,394 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:04:02,411 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:02,412 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:04:02,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 16:04:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:02,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:02,453 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:02,454 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:02,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:04:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:04:02,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661325018] [2021-02-21 16:04:02,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:04:02,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 16:04:02,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393422083] [2021-02-21 16:04:02,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 16:04:02,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:04:02,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 16:04:02,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-21 16:04:02,479 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 9 states. [2021-02-21 16:04:02,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:04:02,899 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-02-21 16:04:02,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 16:04:02,900 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2021-02-21 16:04:02,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:04:02,902 INFO L225 Difference]: With dead ends: 37 [2021-02-21 16:04:02,902 INFO L226 Difference]: Without dead ends: 33 [2021-02-21 16:04:02,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-21 16:04:02,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-02-21 16:04:02,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-02-21 16:04:02,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-02-21 16:04:02,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-02-21 16:04:02,913 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 21 [2021-02-21 16:04:02,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:04:02,914 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-02-21 16:04:02,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 16:04:02,914 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-02-21 16:04:02,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-21 16:04:02,915 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:04:02,916 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] [2021-02-21 16:04:02,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 16:04:02,916 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:04:02,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:04:02,917 INFO L82 PathProgramCache]: Analyzing trace with hash -987405527, now seen corresponding path program 1 times [2021-02-21 16:04:02,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:04:02,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204541413] [2021-02-21 16:04:02,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:04:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:02,956 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:02,957 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:02,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:02,958 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:02,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:04:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:02,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:02,992 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:02,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-21 16:04:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:03,012 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:03,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:03,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:03,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:03,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 16:04:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:03,042 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:03,043 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:03,048 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:03,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:04:03,063 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 16:04:03,066 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 16:04:03,099 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:03,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:03,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 16:04:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:03,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:03,112 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:03,113 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:03,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:04:03,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-21 16:04:03,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204541413] [2021-02-21 16:04:03,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:04:03,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:04:03,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398695608] [2021-02-21 16:04:03,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:04:03,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:04:03,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:04:03,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:04:03,140 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2021-02-21 16:04:03,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:04:03,398 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-02-21 16:04:03,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 16:04:03,399 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2021-02-21 16:04:03,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:04:03,401 INFO L225 Difference]: With dead ends: 49 [2021-02-21 16:04:03,402 INFO L226 Difference]: Without dead ends: 37 [2021-02-21 16:04:03,406 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 [2021-02-21 16:04:03,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-21 16:04:03,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-02-21 16:04:03,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-02-21 16:04:03,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-02-21 16:04:03,427 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2021-02-21 16:04:03,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:04:03,427 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-02-21 16:04:03,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:04:03,428 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-02-21 16:04:03,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-21 16:04:03,432 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:04:03,433 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] [2021-02-21 16:04:03,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 16:04:03,433 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:04:03,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:04:03,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1183919032, now seen corresponding path program 1 times [2021-02-21 16:04:03,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:04:03,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277284842] [2021-02-21 16:04:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:04:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:03,503 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:03,506 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:03,507 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:03,509 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:03,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:04:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:03,543 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:03,544 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:03,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-21 16:04:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:03,564 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:03,564 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:03,566 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:03,567 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:04:03,576 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 16:04:03,578 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 16:04:03,599 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:03,600 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:03,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 16:04:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:03,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:03,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:03,617 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:03,618 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:04:03,629 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:03,630 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:04:03,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:03,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:04:03,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 16:04:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:04:03,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:03,667 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:04:03,668 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:04:03,669 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:04:03,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-21 16:04:03,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277284842] [2021-02-21 16:04:03,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:04:03,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 16:04:03,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231178531] [2021-02-21 16:04:03,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 16:04:03,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:04:03,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 16:04:03,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-21 16:04:03,689 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2021-02-21 16:04:04,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:04:04,085 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-02-21 16:04:04,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 16:04:04,085 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2021-02-21 16:04:04,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:04:04,087 INFO L225 Difference]: With dead ends: 53 [2021-02-21 16:04:04,087 INFO L226 Difference]: Without dead ends: 41 [2021-02-21 16:04:04,088 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 [2021-02-21 16:04:04,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-02-21 16:04:04,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-02-21 16:04:04,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-21 16:04:04,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-02-21 16:04:04,097 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 28 [2021-02-21 16:04:04,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:04:04,097 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-02-21 16:04:04,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 16:04:04,098 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-02-21 16:04:04,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-21 16:04:04,099 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:04:04,099 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] [2021-02-21 16:04:04,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 16:04:04,100 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:04:04,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:04:04,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1155289881, now seen corresponding path program 1 times [2021-02-21 16:04:04,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:04:04,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119099431] [2021-02-21 16:04:04,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:04:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:04:04,130 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:04:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:04:04,168 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:04:04,201 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-21 16:04:04,201 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 16:04:04,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 16:04:04,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:04:04 BoogieIcfgContainer [2021-02-21 16:04:04,242 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:04:04,244 INFO L168 Benchmark]: Toolchain (without parser) took 5008.53 ms. Allocated memory was 155.2 MB in the beginning and 198.2 MB in the end (delta: 43.0 MB). Free memory was 131.3 MB in the beginning and 133.7 MB in the end (delta: -2.4 MB). Peak memory consumption was 41.5 MB. Max. memory is 8.0 GB. [2021-02-21 16:04:04,244 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 155.2 MB. Free memory is still 127.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:04:04,245 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.37 ms. Allocated memory is still 155.2 MB. Free memory was 130.2 MB in the beginning and 120.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:04:04,245 INFO L168 Benchmark]: Boogie Preprocessor took 41.28 ms. Allocated memory is still 155.2 MB. Free memory was 120.1 MB in the beginning and 118.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 16:04:04,246 INFO L168 Benchmark]: RCFGBuilder took 688.22 ms. Allocated memory is still 155.2 MB. Free memory was 118.7 MB in the beginning and 137.9 MB in the end (delta: -19.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-02-21 16:04:04,247 INFO L168 Benchmark]: TraceAbstraction took 3964.59 ms. Allocated memory was 155.2 MB in the beginning and 198.2 MB in the end (delta: 43.0 MB). Free memory was 137.4 MB in the beginning and 133.7 MB in the end (delta: 3.7 MB). Peak memory consumption was 46.7 MB. Max. memory is 8.0 GB. [2021-02-21 16:04:04,250 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 155.2 MB. Free memory is still 127.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 284.37 ms. Allocated memory is still 155.2 MB. Free memory was 130.2 MB in the beginning and 120.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.28 ms. Allocated memory is still 155.2 MB. Free memory was 120.1 MB in the beginning and 118.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 688.22 ms. Allocated memory is still 155.2 MB. Free memory was 118.7 MB in the beginning and 137.9 MB in the end (delta: -19.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3964.59 ms. Allocated memory was 155.2 MB in the beginning and 198.2 MB in the end (delta: 43.0 MB). Free memory was 137.4 MB in the beginning and 133.7 MB in the end (delta: 3.7 MB). Peak memory consumption was 46.7 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: 3.7s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 1.7s, 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, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.2s 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, 1.3s 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...