/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/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:12:46,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:12:46,291 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:12:46,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:12:46,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:12:46,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:12:46,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:12:46,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:12:46,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:12:46,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:12:46,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:12:46,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:12:46,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:12:46,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:12:46,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:12:46,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:12:46,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:12:46,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:12:46,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:12:46,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:12:46,460 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 04:12:46,485 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:12:46,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:12:46,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:12:46,490 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:12:46,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:12:46,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:12:46,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:12:46,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:12:46,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:12:46,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:12:46,492 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:12:46,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:12:46,493 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:12:46,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:12:46,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:12:46,494 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:12:46,494 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:12:46,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:12:46,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:12:46,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:12:46,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:12:46,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:12:46,495 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:12:46,495 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:12:46,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:12:46,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:12:46,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:12:46,954 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:12:46,955 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:12:46,956 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2021-02-24 04:12:47,045 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ede7a3ab1/a26b27d1518746509087d469ee8c41a0/FLAG85a1a0f0e [2021-02-24 04:12:47,739 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:12:47,740 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2021-02-24 04:12:47,748 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ede7a3ab1/a26b27d1518746509087d469ee8c41a0/FLAG85a1a0f0e [2021-02-24 04:12:48,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ede7a3ab1/a26b27d1518746509087d469ee8c41a0 [2021-02-24 04:12:48,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:12:48,131 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:12:48,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:12:48,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:12:48,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:12:48,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:12:48" (1/1) ... [2021-02-24 04:12:48,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@581a9c1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:12:48, skipping insertion in model container [2021-02-24 04:12:48,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:12:48" (1/1) ... [2021-02-24 04:12:48,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:12:48,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:12:48,316 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] [2021-02-24 04:12:48,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:12:48,331 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:12:48,350 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] [2021-02-24 04:12:48,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:12:48,367 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:12:48,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:12:48 WrapperNode [2021-02-24 04:12:48,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:12:48,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:12:48,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:12:48,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:12:48,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:12:48" (1/1) ... [2021-02-24 04:12:48,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:12:48" (1/1) ... [2021-02-24 04:12:48,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:12:48" (1/1) ... [2021-02-24 04:12:48,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:12:48" (1/1) ... [2021-02-24 04:12:48,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:12:48" (1/1) ... [2021-02-24 04:12:48,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:12:48" (1/1) ... [2021-02-24 04:12:48,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:12:48" (1/1) ... [2021-02-24 04:12:48,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:12:48,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:12:48,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:12:48,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:12:48,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:12:48" (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 [2021-02-24 04:12:48,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:12:48,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:12:48,511 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:12:48,511 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-02-24 04:12:48,511 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2021-02-24 04:12:48,512 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:12:48,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-24 04:12:48,512 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:12:48,512 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:12:48,512 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:12:48,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:12:48,513 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-02-24 04:12:48,513 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2021-02-24 04:12:48,513 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:12:48,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:12:48,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:12:48,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:12:48,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:12:48,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:12:48,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:12:48,825 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:12:48,825 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-24 04:12:48,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:12:48 BoogieIcfgContainer [2021-02-24 04:12:48,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:12:48,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:12:48,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:12:48,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:12:48,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:12:48" (1/3) ... [2021-02-24 04:12:48,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d2fa48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:12:48, skipping insertion in model container [2021-02-24 04:12:48,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:12:48" (2/3) ... [2021-02-24 04:12:48,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d2fa48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:12:48, skipping insertion in model container [2021-02-24 04:12:48,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:12:48" (3/3) ... [2021-02-24 04:12:48,860 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2021-02-24 04:12:48,877 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:12:48,893 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:12:48,920 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:12:48,950 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:12:48,950 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:12:48,950 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:12:48,950 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:12:48,950 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:12:48,950 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:12:48,950 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:12:48,951 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:12:48,969 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2021-02-24 04:12:48,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-24 04:12:48,980 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:12:48,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:12:48,982 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:12:48,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:12:48,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1880205997, now seen corresponding path program 1 times [2021-02-24 04:12:49,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:12:49,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69800798] [2021-02-24 04:12:49,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:12:49,097 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:12:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:49,392 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:49,394 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:49,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:49,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:49,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:49,420 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:49,436 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:49,438 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:49,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:12:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:49,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:49,547 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:49,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-24 04:12:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:49,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:49,569 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:49,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:49,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:12:49,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69800798] [2021-02-24 04:12:49,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:12:49,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 04:12:49,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178681183] [2021-02-24 04:12:49,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 04:12:49,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:12:49,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 04:12:49,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:12:49,635 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 6 states. [2021-02-24 04:12:50,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:12:50,083 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-02-24 04:12:50,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 04:12:50,086 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-02-24 04:12:50,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:12:50,101 INFO L225 Difference]: With dead ends: 60 [2021-02-24 04:12:50,101 INFO L226 Difference]: Without dead ends: 44 [2021-02-24 04:12:50,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:12:50,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-02-24 04:12:50,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-02-24 04:12:50,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-02-24 04:12:50,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-02-24 04:12:50,167 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 24 [2021-02-24 04:12:50,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:12:50,167 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-02-24 04:12:50,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 04:12:50,168 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-02-24 04:12:50,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-24 04:12:50,170 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:12:50,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:12:50,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:12:50,171 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:12:50,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:12:50,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1658084422, now seen corresponding path program 1 times [2021-02-24 04:12:50,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:12:50,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850361600] [2021-02-24 04:12:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:12:50,176 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:12:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:50,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:50,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:50,243 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:50,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:50,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:12:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:50,282 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:50,283 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:50,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-24 04:12:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:50,305 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:50,306 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:50,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:50,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:50,324 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 04:12:50,326 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 04:12:50,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:50,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:50,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-24 04:12:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:50,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:50,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:50,382 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:50,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:12:50,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850361600] [2021-02-24 04:12:50,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:12:50,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 04:12:50,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442520027] [2021-02-24 04:12:50,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 04:12:50,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:12:50,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 04:12:50,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:12:50,400 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 6 states. [2021-02-24 04:12:50,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:12:50,684 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2021-02-24 04:12:50,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 04:12:50,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2021-02-24 04:12:50,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:12:50,687 INFO L225 Difference]: With dead ends: 71 [2021-02-24 04:12:50,688 INFO L226 Difference]: Without dead ends: 52 [2021-02-24 04:12:50,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:12:50,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-24 04:12:50,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-02-24 04:12:50,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-02-24 04:12:50,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-02-24 04:12:50,709 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 33 [2021-02-24 04:12:50,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:12:50,709 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-02-24 04:12:50,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 04:12:50,710 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-02-24 04:12:50,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-24 04:12:50,711 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:12:50,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:12:50,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:12:50,712 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:12:50,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:12:50,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1671222138, now seen corresponding path program 1 times [2021-02-24 04:12:50,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:12:50,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955628638] [2021-02-24 04:12:50,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:12:50,717 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:12:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:50,766 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:50,767 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:50,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:50,769 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:50,777 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 04:12:50,778 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 04:12:50,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:50,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:50,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:12:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:50,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:50,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:50,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-24 04:12:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:50,865 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:50,866 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:50,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:50,868 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:50,879 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:50,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:50,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:50,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:50,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-24 04:12:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:50,913 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:50,914 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:50,915 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:50,916 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:12:50,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955628638] [2021-02-24 04:12:50,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:12:50,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-24 04:12:50,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049102051] [2021-02-24 04:12:50,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 04:12:50,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:12:50,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 04:12:50,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-24 04:12:50,936 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 9 states. [2021-02-24 04:12:51,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:12:51,445 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-02-24 04:12:51,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-24 04:12:51,445 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2021-02-24 04:12:51,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:12:51,447 INFO L225 Difference]: With dead ends: 57 [2021-02-24 04:12:51,447 INFO L226 Difference]: Without dead ends: 52 [2021-02-24 04:12:51,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-02-24 04:12:51,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-24 04:12:51,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-02-24 04:12:51,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-24 04:12:51,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-02-24 04:12:51,478 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 33 [2021-02-24 04:12:51,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:12:51,478 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-02-24 04:12:51,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 04:12:51,479 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-02-24 04:12:51,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-24 04:12:51,480 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:12:51,481 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:12:51,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 04:12:51,481 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:12:51,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:12:51,482 INFO L82 PathProgramCache]: Analyzing trace with hash -816709640, now seen corresponding path program 1 times [2021-02-24 04:12:51,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:12:51,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652073644] [2021-02-24 04:12:51,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:12:51,485 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:12:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:51,529 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:51,530 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:51,531 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:51,531 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:51,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:12:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:51,562 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:51,562 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:51,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-24 04:12:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:51,591 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:51,591 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:51,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:51,592 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:51,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-24 04:12:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:51,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:51,624 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:51,625 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:51,626 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:51,635 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 04:12:51,636 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 04:12:51,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:51,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:51,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-24 04:12:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:51,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:51,667 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:51,668 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:51,668 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-24 04:12:51,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652073644] [2021-02-24 04:12:51,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:12:51,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 04:12:51,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778124738] [2021-02-24 04:12:51,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 04:12:51,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:12:51,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 04:12:51,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:12:51,686 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 6 states. [2021-02-24 04:12:52,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:12:52,003 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2021-02-24 04:12:52,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 04:12:52,003 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2021-02-24 04:12:52,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:12:52,005 INFO L225 Difference]: With dead ends: 77 [2021-02-24 04:12:52,005 INFO L226 Difference]: Without dead ends: 58 [2021-02-24 04:12:52,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:12:52,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-24 04:12:52,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2021-02-24 04:12:52,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-02-24 04:12:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2021-02-24 04:12:52,024 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 42 [2021-02-24 04:12:52,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:12:52,025 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2021-02-24 04:12:52,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 04:12:52,025 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2021-02-24 04:12:52,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-24 04:12:52,026 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:12:52,026 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:12:52,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 04:12:52,027 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:12:52,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:12:52,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1880334392, now seen corresponding path program 1 times [2021-02-24 04:12:52,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:12:52,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608420473] [2021-02-24 04:12:52,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:12:52,031 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:12:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:52,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:52,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:52,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:52,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:52,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:12:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:52,135 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:52,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:52,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-24 04:12:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:52,160 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:52,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:52,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:52,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:52,172 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 04:12:52,173 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 04:12:52,194 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:52,195 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:52,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-24 04:12:52,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:52,211 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:52,212 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:52,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:52,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:52,224 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:52,225 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:52,237 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:52,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:52,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-24 04:12:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:52,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:52,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:52,264 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:52,264 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:52,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-24 04:12:52,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608420473] [2021-02-24 04:12:52,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:12:52,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-24 04:12:52,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764703684] [2021-02-24 04:12:52,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 04:12:52,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:12:52,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 04:12:52,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-24 04:12:52,304 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 9 states. [2021-02-24 04:12:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:12:52,923 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2021-02-24 04:12:52,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-24 04:12:52,924 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2021-02-24 04:12:52,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:12:52,925 INFO L225 Difference]: With dead ends: 83 [2021-02-24 04:12:52,925 INFO L226 Difference]: Without dead ends: 64 [2021-02-24 04:12:52,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-02-24 04:12:52,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-24 04:12:52,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-02-24 04:12:52,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-02-24 04:12:52,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2021-02-24 04:12:52,945 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 42 [2021-02-24 04:12:52,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:12:52,946 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2021-02-24 04:12:52,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 04:12:52,946 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2021-02-24 04:12:52,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-24 04:12:52,947 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:12:52,948 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:12:52,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 04:12:52,948 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:12:52,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:12:52,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1448972168, now seen corresponding path program 1 times [2021-02-24 04:12:52,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:12:52,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674737869] [2021-02-24 04:12:52,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:12:52,952 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:12:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:12:52,966 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:12:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:12:52,981 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:12:53,018 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 04:12:53,018 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:12:53,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-24 04:12:53,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:12:53 BoogieIcfgContainer [2021-02-24 04:12:53,041 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:12:53,043 INFO L168 Benchmark]: Toolchain (without parser) took 4922.78 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.3 MB in the beginning and 70.8 MB in the end (delta: 56.5 MB). Peak memory consumption was 88.1 MB. Max. memory is 8.0 GB. [2021-02-24 04:12:53,043 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:12:53,044 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.13 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:12:53,045 INFO L168 Benchmark]: Boogie Preprocessor took 35.54 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:12:53,045 INFO L168 Benchmark]: RCFGBuilder took 425.92 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 133.1 MB in the end (delta: -17.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. [2021-02-24 04:12:53,046 INFO L168 Benchmark]: TraceAbstraction took 4206.27 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 132.5 MB in the beginning and 70.8 MB in the end (delta: 61.7 MB). Peak memory consumption was 92.6 MB. Max. memory is 8.0 GB. [2021-02-24 04:12:53,049 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 235.13 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.54 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 425.92 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 133.1 MB in the end (delta: -17.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4206.27 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 132.5 MB in the beginning and 70.8 MB in the end (delta: 61.7 MB). Peak memory consumption was 92.6 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) [L10] COND FALSE !(x==0) [L11] CALL, EXPR id2(x-1) [L17] COND FALSE !(x==0) [L18] CALL, EXPR id(x-1) [L10] COND TRUE x==0 [L10] return 0; [L18] RET, EXPR id(x-1) [L18] unsigned int ret = id(x-1) + 1; [L19] COND FALSE !(ret > 3) [L20] return ret; [L11] RET, EXPR id2(x-1) [L11] unsigned int ret = id2(x-1) + 1; [L12] COND FALSE !(ret > 3) [L13] return ret; [L25] RET, EXPR id(input) [L25] unsigned int result = id(input); [L26] COND TRUE result == 2 [L27] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.0s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 210 SDtfs, 191 SDslu, 337 SDs, 0 SdLazy, 784 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred 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: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 11 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...