/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/afterrec-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 01:33:35,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 01:33:35,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 01:33:35,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 01:33:35,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 01:33:35,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 01:33:35,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 01:33:35,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 01:33:35,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 01:33:35,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 01:33:35,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 01:33:35,132 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 01:33:35,134 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 01:33:35,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 01:33:35,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 01:33:35,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 01:33:35,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 01:33:35,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 01:33:35,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 01:33:35,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 01:33:35,165 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 01:33:35,177 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 01:33:35,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 01:33:35,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 01:33:35,180 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 01:33:35,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 01:33:35,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 01:33:35,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 01:33:35,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 01:33:35,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 01:33:35,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 01:33:35,181 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 01:33:35,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 01:33:35,182 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 01:33:35,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 01:33:35,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 01:33:35,182 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 01:33:35,183 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 01:33:35,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 01:33:35,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 01:33:35,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 01:33:35,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 01:33:35,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 01:33:35,184 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 01:33:35,184 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 01:33:35,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 01:33:35,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 01:33:35,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 01:33:35,625 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 01:33:35,626 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 01:33:35,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec-2.c [2021-02-22 01:33:35,698 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9917e9658/3e9cec17cbd64d2eaab0fa9197ff18fa/FLAG508b4ce8e [2021-02-22 01:33:36,244 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 01:33:36,244 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec-2.c [2021-02-22 01:33:36,251 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9917e9658/3e9cec17cbd64d2eaab0fa9197ff18fa/FLAG508b4ce8e [2021-02-22 01:33:36,650 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9917e9658/3e9cec17cbd64d2eaab0fa9197ff18fa [2021-02-22 01:33:36,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 01:33:36,671 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 01:33:36,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 01:33:36,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 01:33:36,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 01:33:36,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:33:36" (1/1) ... [2021-02-22 01:33:36,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32ec1619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:33:36, skipping insertion in model container [2021-02-22 01:33:36,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:33:36" (1/1) ... [2021-02-22 01:33:36,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 01:33:36,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 01:33:36,887 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/afterrec-2.c[318,331] [2021-02-22 01:33:36,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:33:36,911 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 01:33:36,925 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/afterrec-2.c[318,331] [2021-02-22 01:33:36,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:33:36,943 INFO L208 MainTranslator]: Completed translation [2021-02-22 01:33:36,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:33:36 WrapperNode [2021-02-22 01:33:36,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 01:33:36,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 01:33:36,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 01:33:36,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 01:33:36,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:33:36" (1/1) ... [2021-02-22 01:33:36,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:33:36" (1/1) ... [2021-02-22 01:33:36,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:33:36" (1/1) ... [2021-02-22 01:33:36,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:33:36" (1/1) ... [2021-02-22 01:33:36,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:33:36" (1/1) ... [2021-02-22 01:33:36,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:33:36" (1/1) ... [2021-02-22 01:33:36,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:33:36" (1/1) ... [2021-02-22 01:33:36,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 01:33:36,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 01:33:36,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 01:33:36,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 01:33:36,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:33:36" (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 [2021-02-22 01:33:37,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 01:33:37,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 01:33:37,100 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 01:33:37,100 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-02-22 01:33:37,100 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 01:33:37,100 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 01:33:37,101 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 01:33:37,101 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 01:33:37,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 01:33:37,103 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-02-22 01:33:37,103 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 01:33:37,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 01:33:37,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 01:33:37,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 01:33:37,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 01:33:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 01:33:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 01:33:37,382 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 01:33:37,383 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-22 01:33:37,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:33:37 BoogieIcfgContainer [2021-02-22 01:33:37,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 01:33:37,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 01:33:37,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 01:33:37,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 01:33:37,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 01:33:36" (1/3) ... [2021-02-22 01:33:37,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f9a073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:33:37, skipping insertion in model container [2021-02-22 01:33:37,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:33:36" (2/3) ... [2021-02-22 01:33:37,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f9a073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:33:37, skipping insertion in model container [2021-02-22 01:33:37,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:33:37" (3/3) ... [2021-02-22 01:33:37,394 INFO L111 eAbstractionObserver]: Analyzing ICFG afterrec-2.c [2021-02-22 01:33:37,401 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 01:33:37,405 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 01:33:37,425 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 01:33:37,449 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 01:33:37,449 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 01:33:37,450 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 01:33:37,450 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 01:33:37,450 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 01:33:37,450 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 01:33:37,450 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 01:33:37,450 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 01:33:37,465 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2021-02-22 01:33:37,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-22 01:33:37,477 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:33:37,478 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:33:37,478 INFO L428 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:33:37,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:33:37,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1187410242, now seen corresponding path program 1 times [2021-02-22 01:33:37,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:33:37,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751313116] [2021-02-22 01:33:37,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:33:37,621 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:33:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:33:37,760 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:33:37,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:33:37,766 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:33:37,767 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:33:37,780 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:33:37,781 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 01:33:37,795 WARN L141 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-02-22 01:33:37,796 WARN L147 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size 1 [2021-02-22 01:33:37,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:33:37,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:33:37,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:33:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:33:37,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:33:37,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:33:37,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-02-22 01:33:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:33:37,864 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:33:37,865 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:33:37,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:33:37,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751313116] [2021-02-22 01:33:37,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:33:37,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-22 01:33:37,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746120834] [2021-02-22 01:33:37,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-22 01:33:37,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:33:37,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-22 01:33:37,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-22 01:33:37,905 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2021-02-22 01:33:38,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:33:38,165 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-02-22 01:33:38,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-22 01:33:38,167 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2021-02-22 01:33:38,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:33:38,174 INFO L225 Difference]: With dead ends: 36 [2021-02-22 01:33:38,174 INFO L226 Difference]: Without dead ends: 0 [2021-02-22 01:33:38,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-22 01:33:38,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-22 01:33:38,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-22 01:33:38,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-22 01:33:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-22 01:33:38,205 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-02-22 01:33:38,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:33:38,206 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-22 01:33:38,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-22 01:33:38,206 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-22 01:33:38,206 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-22 01:33:38,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 01:33:38,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-22 01:33:38,503 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-22 01:33:38,503 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-22 01:33:38,503 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-22 01:33:38,504 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-22 01:33:38,504 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-22 01:33:38,504 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-22 01:33:38,504 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-22 01:33:38,504 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-22 01:33:38,504 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-22 01:33:38,505 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-22 01:33:38,505 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-22 01:33:38,505 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-22 01:33:38,505 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-22 01:33:38,506 INFO L185 CegarLoopUtils]: At program point fErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) the Hoare annotation is: (not (= |f_#in~n| 2)) [2021-02-22 01:33:38,506 INFO L185 CegarLoopUtils]: At program point fFINAL(lines 5 10) the Hoare annotation is: (or (not (= |f_#in~n| 2)) (= 2 f_~n)) [2021-02-22 01:33:38,506 INFO L185 CegarLoopUtils]: At program point L9(line 9) the Hoare annotation is: (not (= |f_#in~n| 2)) [2021-02-22 01:33:38,506 INFO L185 CegarLoopUtils]: At program point L8(line 8) the Hoare annotation is: (not (= |f_#in~n| 2)) [2021-02-22 01:33:38,507 INFO L185 CegarLoopUtils]: At program point fEXIT(lines 5 10) the Hoare annotation is: (or (not (= |f_#in~n| 2)) (= 2 f_~n)) [2021-02-22 01:33:38,507 INFO L185 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: (not (= |f_#in~n| 2)) [2021-02-22 01:33:38,507 INFO L185 CegarLoopUtils]: At program point L8-1(lines 5 10) the Hoare annotation is: (not (= |f_#in~n| 2)) [2021-02-22 01:33:38,507 INFO L185 CegarLoopUtils]: At program point L6(line 6) the Hoare annotation is: (or (not (= |f_#in~n| 2)) (= 2 f_~n)) [2021-02-22 01:33:38,508 INFO L185 CegarLoopUtils]: At program point L7-1(line 7) the Hoare annotation is: (not (= |f_#in~n| 2)) [2021-02-22 01:33:38,508 INFO L192 CegarLoopUtils]: At program point fENTRY(lines 5 10) the Hoare annotation is: true [2021-02-22 01:33:38,509 INFO L185 CegarLoopUtils]: At program point L7-2(line 7) the Hoare annotation is: (not (= |f_#in~n| 2)) [2021-02-22 01:33:38,509 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-22 01:33:38,510 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-22 01:33:38,510 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-22 01:33:38,510 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-22 01:33:38,510 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 12 14) the Hoare annotation is: true [2021-02-22 01:33:38,512 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 12 14) the Hoare annotation is: true [2021-02-22 01:33:38,512 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 12 14) the Hoare annotation is: true [2021-02-22 01:33:38,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 01:33:38 BoogieIcfgContainer [2021-02-22 01:33:38,532 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 01:33:38,536 INFO L168 Benchmark]: Toolchain (without parser) took 1874.43 ms. Allocated memory is still 161.5 MB. Free memory was 136.7 MB in the beginning and 97.9 MB in the end (delta: 38.7 MB). Peak memory consumption was 39.2 MB. Max. memory is 8.0 GB. [2021-02-22 01:33:38,538 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 161.5 MB. Free memory is still 135.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 01:33:38,541 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.30 ms. Allocated memory is still 161.5 MB. Free memory was 135.6 MB in the beginning and 126.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 01:33:38,544 INFO L168 Benchmark]: Boogie Preprocessor took 31.05 ms. Allocated memory is still 161.5 MB. Free memory was 126.6 MB in the beginning and 125.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 01:33:38,545 INFO L168 Benchmark]: RCFGBuilder took 408.15 ms. Allocated memory is still 161.5 MB. Free memory was 125.3 MB in the beginning and 113.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-02-22 01:33:38,546 INFO L168 Benchmark]: TraceAbstraction took 1145.86 ms. Allocated memory is still 161.5 MB. Free memory was 112.6 MB in the beginning and 97.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 15.1 MB. Max. memory is 8.0 GB. [2021-02-22 01:33:38,555 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 161.5 MB. Free memory is still 135.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 268.30 ms. Allocated memory is still 161.5 MB. Free memory was 135.6 MB in the beginning and 126.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.05 ms. Allocated memory is still 161.5 MB. Free memory was 126.6 MB in the beginning and 125.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 408.15 ms. Allocated memory is still 161.5 MB. Free memory was 125.3 MB in the beginning and 113.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1145.86 ms. Allocated memory is still 161.5 MB. Free memory was 112.6 MB in the beginning and 97.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 15.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 5]: Procedure Contract for f Derived contract for procedure f: !(\old(n) == 2) || 2 == n - ProcedureContractResult [Line: 12]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.7s, OverallIterations: 1, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 9 SDslu, 33 SDs, 0 SdLazy, 15 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 28 LocationsWithAnnotation, 39 PreInvPairs, 45 NumberOfFragments, 100 HoareAnnotationTreeSize, 39 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 28 FomulaSimplificationsInter, 230 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, 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 correct! Received shutdown request...