/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/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 20:29:17,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:29:17,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:29:17,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 20:29:17,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:29:17,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:29:17,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:29:17,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:29:17,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:29:17,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:29:17,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:29:17,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:29:17,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:29:17,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:29:17,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:29:17,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:29:17,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 20:29:17,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:29:17,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:29:17,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:29:17,304 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 20:29:17,330 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:29:17,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:29:17,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:29:17,337 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:29:17,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:29:17,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:29:17,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:29:17,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:29:17,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:29:17,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:29:17,339 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:29:17,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:29:17,340 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:29:17,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:29:17,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:29:17,340 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:29:17,340 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:29:17,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:29:17,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:29:17,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:29:17,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:29:17,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:29:17,342 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:29:17,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:29:17,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:29:17,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:29:17,783 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:29:17,784 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:29:17,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o3.c [2021-02-21 20:29:17,860 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8968709d9/38f03084f76649c0ba90ce475db18244/FLAG7f5432190 [2021-02-21 20:29:18,521 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:29:18,522 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o3.c [2021-02-21 20:29:18,533 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8968709d9/38f03084f76649c0ba90ce475db18244/FLAG7f5432190 [2021-02-21 20:29:18,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8968709d9/38f03084f76649c0ba90ce475db18244 [2021-02-21 20:29:18,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:29:18,890 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:29:18,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:29:18,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:29:18,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:29:18,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:29:18" (1/1) ... [2021-02-21 20:29:18,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@632cd35f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:18, skipping insertion in model container [2021-02-21 20:29:18,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:29:18" (1/1) ... [2021-02-21 20:29:18,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:29:18,947 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:29:19,130 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/id_o3.c[514,527] [2021-02-21 20:29:19,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:29:19,147 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:29:19,165 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/id_o3.c[514,527] [2021-02-21 20:29:19,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:29:19,184 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:29:19,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:19 WrapperNode [2021-02-21 20:29:19,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:29:19,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:29:19,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:29:19,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:29:19,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:19" (1/1) ... [2021-02-21 20:29:19,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:19" (1/1) ... [2021-02-21 20:29:19,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:19" (1/1) ... [2021-02-21 20:29:19,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:19" (1/1) ... [2021-02-21 20:29:19,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:19" (1/1) ... [2021-02-21 20:29:19,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:19" (1/1) ... [2021-02-21 20:29:19,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:19" (1/1) ... [2021-02-21 20:29:19,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:29:19,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:29:19,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:29:19,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:29:19,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:29:19,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:29:19,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:29:19,398 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:29:19,398 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-02-21 20:29:19,398 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:29:19,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-21 20:29:19,399 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:29:19,399 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:29:19,399 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:29:19,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:29:19,400 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-02-21 20:29:19,400 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:29:19,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:29:19,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:29:19,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:29:19,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:29:19,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:29:19,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:29:19,645 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:29:19,645 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 20:29:19,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:29:19 BoogieIcfgContainer [2021-02-21 20:29:19,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:29:19,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:29:19,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:29:19,654 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:29:19,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:29:18" (1/3) ... [2021-02-21 20:29:19,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673a9992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:29:19, skipping insertion in model container [2021-02-21 20:29:19,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:19" (2/3) ... [2021-02-21 20:29:19,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673a9992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:29:19, skipping insertion in model container [2021-02-21 20:29:19,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:29:19" (3/3) ... [2021-02-21 20:29:19,658 INFO L111 eAbstractionObserver]: Analyzing ICFG id_o3.c [2021-02-21 20:29:19,667 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:29:19,672 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:29:19,698 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:29:19,729 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:29:19,730 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:29:19,730 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:29:19,730 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:29:19,730 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:29:19,730 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:29:19,731 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:29:19,731 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:29:19,750 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2021-02-21 20:29:19,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 20:29:19,762 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:19,763 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] [2021-02-21 20:29:19,764 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:19,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:19,771 INFO L82 PathProgramCache]: Analyzing trace with hash 285930827, now seen corresponding path program 1 times [2021-02-21 20:29:19,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:19,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069107574] [2021-02-21 20:29:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:19,884 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:20,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:20,069 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:20,070 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:20,071 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:20,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:20,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:20,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:20,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:20,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:20,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:20,175 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:20,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:20,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:20,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:20,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:20,210 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:20,211 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:20,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:29:20,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069107574] [2021-02-21 20:29:20,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:20,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 20:29:20,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824976696] [2021-02-21 20:29:20,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 20:29:20,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:20,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 20:29:20,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 20:29:20,270 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 6 states. [2021-02-21 20:29:20,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:20,635 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-02-21 20:29:20,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 20:29:20,638 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-02-21 20:29:20,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:20,650 INFO L225 Difference]: With dead ends: 46 [2021-02-21 20:29:20,650 INFO L226 Difference]: Without dead ends: 30 [2021-02-21 20:29:20,655 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 [2021-02-21 20:29:20,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-02-21 20:29:20,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-02-21 20:29:20,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-02-21 20:29:20,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-02-21 20:29:20,724 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 24 [2021-02-21 20:29:20,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:20,725 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-02-21 20:29:20,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 20:29:20,725 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-02-21 20:29:20,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-21 20:29:20,728 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:20,728 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:29:20,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:29:20,729 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:20,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:20,730 INFO L82 PathProgramCache]: Analyzing trace with hash 838352253, now seen corresponding path program 1 times [2021-02-21 20:29:20,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:20,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050259910] [2021-02-21 20:29:20,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:20,735 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:20,868 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:20,869 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:20,871 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:20,872 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:20,885 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 20:29:20,888 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 20:29:20,919 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:20,920 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:20,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:21,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:21,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:21,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:21,039 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:21,040 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:21,042 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:21,043 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:21,076 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:21,078 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:21,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:29:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:21,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:21,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:21,138 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:21,139 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:21,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-21 20:29:21,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050259910] [2021-02-21 20:29:21,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:21,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 20:29:21,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848794064] [2021-02-21 20:29:21,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 20:29:21,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:21,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 20:29:21,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-21 20:29:21,175 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 8 states. [2021-02-21 20:29:21,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:21,565 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-02-21 20:29:21,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-21 20:29:21,566 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2021-02-21 20:29:21,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:21,568 INFO L225 Difference]: With dead ends: 39 [2021-02-21 20:29:21,568 INFO L226 Difference]: Without dead ends: 34 [2021-02-21 20:29:21,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-02-21 20:29:21,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-02-21 20:29:21,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-02-21 20:29:21,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-02-21 20:29:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-02-21 20:29:21,583 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2021-02-21 20:29:21,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:21,584 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-02-21 20:29:21,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 20:29:21,584 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-02-21 20:29:21,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-21 20:29:21,586 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:21,586 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-02-21 20:29:21,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:29:21,587 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:21,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:21,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1267124291, now seen corresponding path program 2 times [2021-02-21 20:29:21,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:21,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335585568] [2021-02-21 20:29:21,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:21,591 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:21,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:21,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:21,678 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:21,679 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:21,690 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 20:29:21,691 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 20:29:21,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:21,715 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:21,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:21,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:21,774 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:21,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:21,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:21,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:21,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:21,823 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:21,833 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:21,834 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:21,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:29:21,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:21,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:21,858 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:21,859 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:21,859 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:21,871 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:21,872 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:21,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:29:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:21,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:21,895 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:21,896 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:21,897 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-21 20:29:21,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335585568] [2021-02-21 20:29:21,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:21,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 20:29:21,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113903060] [2021-02-21 20:29:21,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 20:29:21,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:21,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 20:29:21,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-02-21 20:29:21,932 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 10 states. [2021-02-21 20:29:22,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:22,447 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-02-21 20:29:22,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-21 20:29:22,448 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2021-02-21 20:29:22,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:22,449 INFO L225 Difference]: With dead ends: 43 [2021-02-21 20:29:22,450 INFO L226 Difference]: Without dead ends: 38 [2021-02-21 20:29:22,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-02-21 20:29:22,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-02-21 20:29:22,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-02-21 20:29:22,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-21 20:29:22,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-02-21 20:29:22,463 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 38 [2021-02-21 20:29:22,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:22,464 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-02-21 20:29:22,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 20:29:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-02-21 20:29:22,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-21 20:29:22,466 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:22,466 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:29:22,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:29:22,466 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:22,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:22,467 INFO L82 PathProgramCache]: Analyzing trace with hash -655881425, now seen corresponding path program 3 times [2021-02-21 20:29:22,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:22,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117007452] [2021-02-21 20:29:22,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:22,470 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:29:22,497 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:29:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:29:22,520 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:29:22,603 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 20:29:22,608 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 20:29:22,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 20:29:22,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:29:22 BoogieIcfgContainer [2021-02-21 20:29:22,650 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:29:22,652 INFO L168 Benchmark]: Toolchain (without parser) took 3774.33 ms. Allocated memory was 163.6 MB in the beginning and 197.1 MB in the end (delta: 33.6 MB). Free memory was 122.6 MB in the beginning and 86.7 MB in the end (delta: 35.9 MB). Peak memory consumption was 71.0 MB. Max. memory is 8.0 GB. [2021-02-21 20:29:22,653 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 163.6 MB. Free memory is still 138.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:29:22,653 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.19 ms. Allocated memory is still 163.6 MB. Free memory was 121.6 MB in the beginning and 140.5 MB in the end (delta: -19.0 MB). Peak memory consumption was 5.6 MB. Max. memory is 8.0 GB. [2021-02-21 20:29:22,654 INFO L168 Benchmark]: Boogie Preprocessor took 33.60 ms. Allocated memory is still 163.6 MB. Free memory was 140.5 MB in the beginning and 139.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 20:29:22,655 INFO L168 Benchmark]: RCFGBuilder took 426.99 ms. Allocated memory is still 163.6 MB. Free memory was 139.5 MB in the beginning and 135.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-02-21 20:29:22,656 INFO L168 Benchmark]: TraceAbstraction took 3000.21 ms. Allocated memory was 163.6 MB in the beginning and 197.1 MB in the end (delta: 33.6 MB). Free memory was 135.5 MB in the beginning and 86.7 MB in the end (delta: 48.8 MB). Peak memory consumption was 83.4 MB. Max. memory is 8.0 GB. [2021-02-21 20:29:22,660 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 163.6 MB. Free memory is still 138.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 293.19 ms. Allocated memory is still 163.6 MB. Free memory was 121.6 MB in the beginning and 140.5 MB in the end (delta: -19.0 MB). Peak memory consumption was 5.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.60 ms. Allocated memory is still 163.6 MB. Free memory was 140.5 MB in the beginning and 139.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 426.99 ms. Allocated memory is still 163.6 MB. Free memory was 139.5 MB in the beginning and 135.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3000.21 ms. Allocated memory was 163.6 MB in the beginning and 197.1 MB in the end (delta: 33.6 MB). Free memory was 135.5 MB in the beginning and 86.7 MB in the end (delta: 48.8 MB). Peak memory consumption was 83.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] unsigned int input = __VERIFIER_nondet_uint(); [L13] CALL, EXPR id(input) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND TRUE x==0 [L7] return 0; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] unsigned int result = id(input); [L14] COND TRUE result == 3 [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.8s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 83 SDtfs, 69 SDslu, 226 SDs, 0 SdLazy, 304 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=3, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 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...