/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/fibo_5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:12:27,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:12:27,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:12:27,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:12:27,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:12:27,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:12:27,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:12:27,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:12:27,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:12:27,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:12:27,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:12:27,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:12:27,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:12:27,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:12:27,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:12:27,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:12:27,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:12:27,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:12:27,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:12:27,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:12:27,628 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 04:12:27,656 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:12:27,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:12:27,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:12:27,661 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:12:27,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:12:27,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:12:27,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:12:27,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:12:27,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:12:27,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:12:27,664 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:12:27,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:12:27,664 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:12:27,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:12:27,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:12:27,665 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:12:27,665 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:12:27,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:12:27,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:12:27,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:12:27,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:12:27,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:12:27,667 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:12:27,667 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:12:28,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:12:28,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:12:28,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:12:28,144 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:12:28,145 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:12:28,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-2.c [2021-02-24 04:12:28,247 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88f9dc83b/0a6bd0f4a72b4a458ddd7a031a606751/FLAGde622dc4d [2021-02-24 04:12:28,972 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:12:28,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-2.c [2021-02-24 04:12:28,982 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88f9dc83b/0a6bd0f4a72b4a458ddd7a031a606751/FLAGde622dc4d [2021-02-24 04:12:29,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88f9dc83b/0a6bd0f4a72b4a458ddd7a031a606751 [2021-02-24 04:12:29,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:12:29,364 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:12:29,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:12:29,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:12:29,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:12:29,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:12:29" (1/1) ... [2021-02-24 04:12:29,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bcea699 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:12:29, skipping insertion in model container [2021-02-24 04:12:29,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:12:29" (1/1) ... [2021-02-24 04:12:29,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:12:29,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:12:29,579 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/fibo_5-2.c[740,753] [2021-02-24 04:12:29,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:12:29,603 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:12:29,621 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/fibo_5-2.c[740,753] [2021-02-24 04:12:29,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:12:29,639 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:12:29,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:12:29 WrapperNode [2021-02-24 04:12:29,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:12:29,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:12:29,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:12:29,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:12:29,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:12:29" (1/1) ... [2021-02-24 04:12:29,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:12:29" (1/1) ... [2021-02-24 04:12:29,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:12:29" (1/1) ... [2021-02-24 04:12:29,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:12:29" (1/1) ... [2021-02-24 04:12:29,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:12:29" (1/1) ... [2021-02-24 04:12:29,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:12:29" (1/1) ... [2021-02-24 04:12:29,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:12:29" (1/1) ... [2021-02-24 04:12:29,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:12:29,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:12:29,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:12:29,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:12:29,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:12:29" (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 04:12:29,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:12:29,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:12:29,793 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:12:29,793 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2021-02-24 04:12:29,793 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:12:29,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:12:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:12:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:12:29,795 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:12:29,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:12:29,796 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2021-02-24 04:12:29,796 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:12:29,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:12:29,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:12:29,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:12:29,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:12:29,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:12:29,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:12:30,104 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:12:30,105 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-24 04:12:30,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:12:30 BoogieIcfgContainer [2021-02-24 04:12:30,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:12:30,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:12:30,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:12:30,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:12:30,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:12:29" (1/3) ... [2021-02-24 04:12:30,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7baa69fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:12:30, skipping insertion in model container [2021-02-24 04:12:30,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:12:29" (2/3) ... [2021-02-24 04:12:30,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7baa69fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:12:30, skipping insertion in model container [2021-02-24 04:12:30,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:12:30" (3/3) ... [2021-02-24 04:12:30,137 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_5-2.c [2021-02-24 04:12:30,159 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:12:30,173 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:12:30,216 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:12:30,302 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:12:30,303 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:12:30,303 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:12:30,303 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:12:30,303 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:12:30,304 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:12:30,304 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:12:30,304 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:12:30,324 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2021-02-24 04:12:30,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-24 04:12:30,335 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:12:30,337 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 04:12:30,337 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:12:30,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:12:30,345 INFO L82 PathProgramCache]: Analyzing trace with hash -61711174, now seen corresponding path program 1 times [2021-02-24 04:12:30,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:12:30,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46873933] [2021-02-24 04:12:30,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:12:30,462 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:12:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:30,634 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:30,636 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:30,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:30,640 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:30,662 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:30,663 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:30,686 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:30,688 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:30,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:12:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:30,767 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:30,768 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:30,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:12:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:30,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:30,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:30,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:30,799 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:30,816 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 04:12:30,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46873933] [2021-02-24 04:12:30,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:12:30,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 04:12:30,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779281706] [2021-02-24 04:12:30,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 04:12:30,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:12:30,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 04:12:30,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:12:30,849 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 6 states. [2021-02-24 04:12:31,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:12:31,368 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2021-02-24 04:12:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 04:12:31,370 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-02-24 04:12:31,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:12:31,383 INFO L225 Difference]: With dead ends: 56 [2021-02-24 04:12:31,383 INFO L226 Difference]: Without dead ends: 36 [2021-02-24 04:12:31,388 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 04:12:31,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-02-24 04:12:31,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-02-24 04:12:31,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-02-24 04:12:31,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-02-24 04:12:31,456 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2021-02-24 04:12:31,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:12:31,457 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-02-24 04:12:31,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 04:12:31,457 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-02-24 04:12:31,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-24 04:12:31,460 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:12:31,460 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] [2021-02-24 04:12:31,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:12:31,461 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:12:31,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:12:31,462 INFO L82 PathProgramCache]: Analyzing trace with hash 118225994, now seen corresponding path program 1 times [2021-02-24 04:12:31,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:12:31,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919189983] [2021-02-24 04:12:31,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:12:31,466 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:12:31,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:31,510 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:31,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:31,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:31,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:31,518 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:31,519 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:31,539 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:31,540 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:31,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:12:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:31,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:31,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:31,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:12:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:31,596 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:31,597 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:31,599 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:31,600 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:31,613 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 04:12:31,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919189983] [2021-02-24 04:12:31,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:12:31,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 04:12:31,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728533209] [2021-02-24 04:12:31,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 04:12:31,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:12:31,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 04:12:31,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:12:31,617 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 6 states. [2021-02-24 04:12:31,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:12:31,911 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-02-24 04:12:31,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 04:12:31,914 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2021-02-24 04:12:31,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:12:31,924 INFO L225 Difference]: With dead ends: 44 [2021-02-24 04:12:31,925 INFO L226 Difference]: Without dead ends: 38 [2021-02-24 04:12:31,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 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 04:12:31,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-02-24 04:12:31,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-02-24 04:12:31,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-02-24 04:12:31,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-02-24 04:12:31,948 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 25 [2021-02-24 04:12:31,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:12:31,949 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-02-24 04:12:31,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 04:12:31,949 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-02-24 04:12:31,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-24 04:12:31,951 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:12:31,951 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:12:31,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:12:31,952 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:12:31,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:12:31,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1102510105, now seen corresponding path program 1 times [2021-02-24 04:12:31,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:12:31,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100892428] [2021-02-24 04:12:31,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:12:31,956 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:12:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:32,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:32,026 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:32,027 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:32,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:32,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:12:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:32,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:32,068 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:32,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:12:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:32,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:32,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:32,088 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-24 04:12:32,090 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-24 04:12:32,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:32,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:12:32,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:32,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:32,109 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:32,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:32,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:12:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:32,122 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:32,123 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:32,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:32,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:32,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-24 04:12:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:32,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:32,143 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:32,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-24 04:12:32,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100892428] [2021-02-24 04:12:32,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:12:32,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-24 04:12:32,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221214966] [2021-02-24 04:12:32,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-24 04:12:32,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:12:32,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-24 04:12:32,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-24 04:12:32,151 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 7 states. [2021-02-24 04:12:32,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:12:32,409 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-02-24 04:12:32,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 04:12:32,410 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2021-02-24 04:12:32,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:12:32,412 INFO L225 Difference]: With dead ends: 60 [2021-02-24 04:12:32,412 INFO L226 Difference]: Without dead ends: 38 [2021-02-24 04:12:32,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-02-24 04:12:32,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-02-24 04:12:32,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-02-24 04:12:32,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-24 04:12:32,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-02-24 04:12:32,438 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 41 [2021-02-24 04:12:32,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:12:32,439 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-02-24 04:12:32,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-24 04:12:32,441 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-02-24 04:12:32,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-24 04:12:32,444 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:12:32,444 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-02-24 04:12:32,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 04:12:32,446 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:12:32,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:12:32,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1786640255, now seen corresponding path program 1 times [2021-02-24 04:12:32,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:12:32,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375315170] [2021-02-24 04:12:32,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:12:32,460 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:12:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:32,538 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:32,539 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:32,541 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:32,541 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:32,547 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:32,547 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:32,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:12:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:32,594 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:32,596 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:32,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:12:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:32,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:32,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:32,655 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:32,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:32,665 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:32,666 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:32,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:12:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:32,693 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:32,694 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:32,696 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:32,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:32,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-24 04:12:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:32,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:32,727 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-24 04:12:32,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375315170] [2021-02-24 04:12:32,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:12:32,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-24 04:12:32,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132442077] [2021-02-24 04:12:32,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-24 04:12:32,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:12:32,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-24 04:12:32,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-24 04:12:32,745 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2021-02-24 04:12:33,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:12:33,150 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2021-02-24 04:12:33,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-24 04:12:33,151 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2021-02-24 04:12:33,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:12:33,154 INFO L225 Difference]: With dead ends: 64 [2021-02-24 04:12:33,155 INFO L226 Difference]: Without dead ends: 58 [2021-02-24 04:12:33,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-02-24 04:12:33,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-24 04:12:33,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-02-24 04:12:33,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-02-24 04:12:33,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2021-02-24 04:12:33,179 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 42 [2021-02-24 04:12:33,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:12:33,179 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2021-02-24 04:12:33,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-24 04:12:33,180 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2021-02-24 04:12:33,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-24 04:12:33,182 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:12:33,183 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:12:33,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 04:12:33,183 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:12:33,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:12:33,184 INFO L82 PathProgramCache]: Analyzing trace with hash -413883838, now seen corresponding path program 2 times [2021-02-24 04:12:33,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:12:33,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990420604] [2021-02-24 04:12:33,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:12:33,187 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:12:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:33,224 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:33,227 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:33,228 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:33,229 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:33,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:12:33,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:33,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:33,274 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:33,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:12:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:33,314 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:33,316 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:33,318 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:33,319 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:33,326 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:33,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:33,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:12:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:33,365 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:33,365 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:33,377 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-24 04:12:33,379 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-24 04:12:33,388 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-24 04:12:33,392 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-24 04:12:33,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:33,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:33,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:12:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:33,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:33,428 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:33,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-24 04:12:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:33,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:33,439 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:33,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-24 04:12:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:33,468 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:33,469 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:33,470 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:33,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:33,490 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-02-24 04:12:33,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990420604] [2021-02-24 04:12:33,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:12:33,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-24 04:12:33,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055536934] [2021-02-24 04:12:33,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 04:12:33,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:12:33,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 04:12:33,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-24 04:12:33,493 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 9 states. [2021-02-24 04:12:33,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:12:33,833 INFO L93 Difference]: Finished difference Result 116 states and 159 transitions. [2021-02-24 04:12:33,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-24 04:12:33,834 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2021-02-24 04:12:33,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:12:33,837 INFO L225 Difference]: With dead ends: 116 [2021-02-24 04:12:33,838 INFO L226 Difference]: Without dead ends: 72 [2021-02-24 04:12:33,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-02-24 04:12:33,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-02-24 04:12:33,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2021-02-24 04:12:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-24 04:12:33,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2021-02-24 04:12:33,879 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 59 [2021-02-24 04:12:33,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:12:33,880 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2021-02-24 04:12:33,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 04:12:33,880 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2021-02-24 04:12:33,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-02-24 04:12:33,883 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:12:33,884 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:12:33,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 04:12:33,884 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:12:33,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:12:33,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1197296150, now seen corresponding path program 3 times [2021-02-24 04:12:33,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:12:33,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476278784] [2021-02-24 04:12:33,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:12:33,888 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:12:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:33,920 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:33,921 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:33,922 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:33,922 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:33,925 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:33,926 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:33,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:12:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:33,952 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:33,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:33,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:12:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:33,974 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:33,975 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:33,980 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:33,981 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:33,992 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:33,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:33,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:12:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:34,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:34,015 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:34,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,026 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:34,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:12:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:34,041 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,041 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:34,042 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,043 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:34,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-24 04:12:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:34,057 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,058 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:34,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-24 04:12:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:34,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:34,075 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-02-24 04:12:34,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476278784] [2021-02-24 04:12:34,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:12:34,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-24 04:12:34,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571431584] [2021-02-24 04:12:34,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 04:12:34,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:12:34,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 04:12:34,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:12:34,078 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand 10 states. [2021-02-24 04:12:34,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:12:34,461 INFO L93 Difference]: Finished difference Result 94 states and 122 transitions. [2021-02-24 04:12:34,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-24 04:12:34,462 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2021-02-24 04:12:34,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:12:34,466 INFO L225 Difference]: With dead ends: 94 [2021-02-24 04:12:34,466 INFO L226 Difference]: Without dead ends: 88 [2021-02-24 04:12:34,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-02-24 04:12:34,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-02-24 04:12:34,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2021-02-24 04:12:34,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-02-24 04:12:34,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 108 transitions. [2021-02-24 04:12:34,499 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 108 transitions. Word has length 60 [2021-02-24 04:12:34,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:12:34,499 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 108 transitions. [2021-02-24 04:12:34,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 04:12:34,500 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 108 transitions. [2021-02-24 04:12:34,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-02-24 04:12:34,507 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:12:34,508 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:12:34,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-24 04:12:34,508 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:12:34,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:12:34,509 INFO L82 PathProgramCache]: Analyzing trace with hash -801021678, now seen corresponding path program 4 times [2021-02-24 04:12:34,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:12:34,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326854124] [2021-02-24 04:12:34,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:12:34,512 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:12:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:34,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:34,614 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,615 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:34,618 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,618 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:34,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:12:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:34,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:34,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:12:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:34,720 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:34,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:34,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:34,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:12:34,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:34,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:34,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:34,792 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,793 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:34,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:12:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:34,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,822 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:34,824 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,829 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:34,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,839 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:34,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:12:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:34,854 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:34,856 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,857 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:34,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-24 04:12:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:34,873 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:34,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-24 04:12:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:34,879 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:34,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-24 04:12:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:34,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,898 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:34,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:12:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:34,908 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,909 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:34,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:12:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:34,915 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,916 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:34,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:12:34,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:34,920 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,922 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:34,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-24 04:12:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:34,925 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,926 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:34,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-24 04:12:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:34,930 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,931 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:34,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-24 04:12:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:34,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:34,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-02-24 04:12:35,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326854124] [2021-02-24 04:12:35,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:12:35,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-24 04:12:35,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981423928] [2021-02-24 04:12:35,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-24 04:12:35,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:12:35,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-24 04:12:35,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-02-24 04:12:35,003 INFO L87 Difference]: Start difference. First operand 82 states and 108 transitions. Second operand 12 states. [2021-02-24 04:12:35,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:12:35,564 INFO L93 Difference]: Finished difference Result 144 states and 197 transitions. [2021-02-24 04:12:35,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-24 04:12:35,565 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 131 [2021-02-24 04:12:35,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:12:35,572 INFO L225 Difference]: With dead ends: 144 [2021-02-24 04:12:35,572 INFO L226 Difference]: Without dead ends: 138 [2021-02-24 04:12:35,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-02-24 04:12:35,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-02-24 04:12:35,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 126. [2021-02-24 04:12:35,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2021-02-24 04:12:35,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 176 transitions. [2021-02-24 04:12:35,627 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 176 transitions. Word has length 131 [2021-02-24 04:12:35,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:12:35,628 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 176 transitions. [2021-02-24 04:12:35,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-24 04:12:35,628 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 176 transitions. [2021-02-24 04:12:35,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-02-24 04:12:35,633 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:12:35,633 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:12:35,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-24 04:12:35,634 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:12:35,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:12:35,635 INFO L82 PathProgramCache]: Analyzing trace with hash 900310772, now seen corresponding path program 5 times [2021-02-24 04:12:35,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:12:35,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519862688] [2021-02-24 04:12:35,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:12:35,641 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:12:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:35,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:35,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:35,744 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:35,744 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:35,747 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:35,747 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:35,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:12:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:35,770 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:35,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:35,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:12:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:35,818 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:35,818 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:35,819 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:35,820 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:35,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:35,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:35,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:12:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:35,861 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:35,862 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:35,870 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:35,872 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:35,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:35,883 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:35,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:12:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:35,929 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:35,930 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:35,931 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:35,932 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:35,942 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:35,943 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:35,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:12:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:35,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:35,982 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:35,986 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:35,987 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:36,001 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,002 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:36,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:12:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:36,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,023 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:36,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:36,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-24 04:12:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:36,047 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,048 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:36,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-24 04:12:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:36,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:36,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-24 04:12:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:36,068 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,069 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:36,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:12:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:36,077 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,078 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:36,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-24 04:12:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:36,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:36,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-02-24 04:12:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:36,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,132 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:36,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:36,142 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:36,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:12:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:36,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:36,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:12:36,185 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,185 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:36,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:12:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:36,212 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:36,215 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-24 04:12:36,216 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-24 04:12:36,235 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-24 04:12:36,236 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-24 04:12:36,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:36,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:12:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:36,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,275 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:36,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:12:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:36,280 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:36,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-24 04:12:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:36,284 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,285 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:36,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-24 04:12:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:36,291 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,292 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:36,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-24 04:12:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:36,302 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,303 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:36,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:12:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:36,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,307 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:36,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-24 04:12:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:36,310 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,311 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:12:36,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-02-24 04:12:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:12:36,325 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,326 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:36,327 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:12:36,327 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:12:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 67 proven. 98 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-02-24 04:12:36,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519862688] [2021-02-24 04:12:36,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:12:36,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-02-24 04:12:36,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828232579] [2021-02-24 04:12:36,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-24 04:12:36,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:12:36,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-24 04:12:36,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-02-24 04:12:36,451 INFO L87 Difference]: Start difference. First operand 126 states and 176 transitions. Second operand 19 states. [2021-02-24 04:12:37,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:12:37,497 INFO L93 Difference]: Finished difference Result 209 states and 321 transitions. [2021-02-24 04:12:37,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-24 04:12:37,498 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 201 [2021-02-24 04:12:37,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:12:37,501 INFO L225 Difference]: With dead ends: 209 [2021-02-24 04:12:37,501 INFO L226 Difference]: Without dead ends: 96 [2021-02-24 04:12:37,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=1106, Unknown=0, NotChecked=0, Total=1406 [2021-02-24 04:12:37,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-02-24 04:12:37,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 83. [2021-02-24 04:12:37,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-02-24 04:12:37,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2021-02-24 04:12:37,555 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 201 [2021-02-24 04:12:37,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:12:37,556 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2021-02-24 04:12:37,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-02-24 04:12:37,556 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2021-02-24 04:12:37,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-02-24 04:12:37,558 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:12:37,559 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:12:37,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-24 04:12:37,559 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:12:37,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:12:37,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1052948029, now seen corresponding path program 6 times [2021-02-24 04:12:37,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:12:37,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778045784] [2021-02-24 04:12:37,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:12:37,563 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:12:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:12:37,586 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:12:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:12:37,609 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:12:37,676 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 04:12:37,677 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:12:37,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-24 04:12:37,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:12:37 BoogieIcfgContainer [2021-02-24 04:12:37,708 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:12:37,709 INFO L168 Benchmark]: Toolchain (without parser) took 8358.10 ms. Allocated memory was 173.0 MB in the beginning and 299.9 MB in the end (delta: 126.9 MB). Free memory was 148.9 MB in the beginning and 261.3 MB in the end (delta: -112.3 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. [2021-02-24 04:12:37,710 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 173.0 MB. Free memory is still 146.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:12:37,711 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.86 ms. Allocated memory is still 173.0 MB. Free memory was 147.8 MB in the beginning and 138.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:12:37,711 INFO L168 Benchmark]: Boogie Preprocessor took 33.40 ms. Allocated memory is still 173.0 MB. Free memory was 138.7 MB in the beginning and 137.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:12:37,711 INFO L168 Benchmark]: RCFGBuilder took 435.60 ms. Allocated memory is still 173.0 MB. Free memory was 137.3 MB in the beginning and 122.8 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-24 04:12:37,712 INFO L168 Benchmark]: TraceAbstraction took 7592.68 ms. Allocated memory was 173.0 MB in the beginning and 299.9 MB in the end (delta: 126.9 MB). Free memory was 122.3 MB in the beginning and 261.3 MB in the end (delta: -138.9 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:12:37,714 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 173.0 MB. Free memory is still 146.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 273.86 ms. Allocated memory is still 173.0 MB. Free memory was 147.8 MB in the beginning and 138.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.40 ms. Allocated memory is still 173.0 MB. Free memory was 138.7 MB in the beginning and 137.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 435.60 ms. Allocated memory is still 173.0 MB. Free memory was 137.3 MB in the beginning and 122.8 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7592.68 ms. Allocated memory was 173.0 MB in the beginning and 299.9 MB in the end (delta: 126.9 MB). Free memory was 122.3 MB in the beginning and 261.3 MB in the end (delta: -138.9 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 29]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L26] int x = 5; [L27] CALL, EXPR fibo(x) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L13] RET, EXPR fibo(n-1) [L13] CALL, EXPR fibo(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L13] RET, EXPR fibo(n-2) [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) [L13] CALL, EXPR fibo(n-2) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L13] RET, EXPR fibo(n-2) [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) [L13] CALL, EXPR fibo(n-2) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L13] RET, EXPR fibo(n-1) [L13] CALL, EXPR fibo(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L13] RET, EXPR fibo(n-2) [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-2) [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) [L13] CALL, EXPR fibo(n-2) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L13] RET, EXPR fibo(n-1) [L13] CALL, EXPR fibo(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L13] RET, EXPR fibo(n-2) [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) [L13] CALL, EXPR fibo(n-2) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L13] RET, EXPR fibo(n-2) [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-2) [L13] return fibo(n-1) + fibo(n-2); [L27] RET, EXPR fibo(x) [L27] int result = fibo(x); [L28] COND TRUE result == 5 [L29] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.3s, OverallIterations: 9, TraceHistogramMax: 21, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 298 SDtfs, 631 SDslu, 513 SDs, 0 SdLazy, 1214 SolverSat, 340 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 255 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=126occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 45 StatesRemovedByMinimization, 5 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...