/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/id2_i5_o5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 17:55:22,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 17:55:22,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 17:55:22,386 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 17:55:22,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 17:55:22,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 17:55:22,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 17:55:22,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 17:55:22,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 17:55:22,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 17:55:22,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 17:55:22,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 17:55:22,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 17:55:22,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 17:55:22,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 17:55:22,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 17:55:22,418 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 17:55:22,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 17:55:22,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 17:55:22,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 17:55:22,452 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 17:55:22,463 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 17:55:22,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 17:55:22,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 17:55:22,465 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 17:55:22,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 17:55:22,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 17:55:22,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 17:55:22,466 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 17:55:22,466 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 17:55:22,467 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 17:55:22,467 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 17:55:22,467 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 17:55:22,467 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 17:55:22,467 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 17:55:22,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 17:55:22,468 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 17:55:22,468 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 17:55:22,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 17:55:22,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:55:22,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 17:55:22,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 17:55:22,469 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 17:55:22,469 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 17:55:22,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 17:55:22,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 17:55:22,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 17:55:22,882 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 17:55:22,883 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 17:55:22,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c [2021-02-23 17:55:22,971 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4b98e615/8bb98fef5130404aaffd5edb49b95d1b/FLAGecfbef705 [2021-02-23 17:55:23,517 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 17:55:23,518 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c [2021-02-23 17:55:23,526 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4b98e615/8bb98fef5130404aaffd5edb49b95d1b/FLAGecfbef705 [2021-02-23 17:55:23,905 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4b98e615/8bb98fef5130404aaffd5edb49b95d1b [2021-02-23 17:55:23,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 17:55:23,931 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 17:55:23,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 17:55:23,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 17:55:23,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 17:55:23,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:55:23" (1/1) ... [2021-02-23 17:55:23,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f5f8be3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:55:23, skipping insertion in model container [2021-02-23 17:55:23,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:55:23" (1/1) ... [2021-02-23 17:55:23,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 17:55:23,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 17:55:24,106 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c[548,561] [2021-02-23 17:55:24,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:55:24,120 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 17:55:24,138 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c[548,561] [2021-02-23 17:55:24,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:55:24,155 INFO L208 MainTranslator]: Completed translation [2021-02-23 17:55:24,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:55:24 WrapperNode [2021-02-23 17:55:24,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 17:55:24,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 17:55:24,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 17:55:24,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 17:55:24,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:55:24" (1/1) ... [2021-02-23 17:55:24,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:55:24" (1/1) ... [2021-02-23 17:55:24,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:55:24" (1/1) ... [2021-02-23 17:55:24,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:55:24" (1/1) ... [2021-02-23 17:55:24,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:55:24" (1/1) ... [2021-02-23 17:55:24,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:55:24" (1/1) ... [2021-02-23 17:55:24,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:55:24" (1/1) ... [2021-02-23 17:55:24,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 17:55:24,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 17:55:24,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 17:55:24,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 17:55:24,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:55:24" (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 [2021-02-23 17:55:24,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 17:55:24,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 17:55:24,308 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 17:55:24,308 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-02-23 17:55:24,309 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2021-02-23 17:55:24,309 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 17:55:24,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 17:55:24,310 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 17:55:24,310 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 17:55:24,311 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 17:55:24,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 17:55:24,312 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-02-23 17:55:24,312 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2021-02-23 17:55:24,313 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 17:55:24,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 17:55:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 17:55:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 17:55:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 17:55:24,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 17:55:24,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 17:55:24,704 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 17:55:24,705 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 17:55:24,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:55:24 BoogieIcfgContainer [2021-02-23 17:55:24,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 17:55:24,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 17:55:24,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 17:55:24,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 17:55:24,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:55:23" (1/3) ... [2021-02-23 17:55:24,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b49a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:55:24, skipping insertion in model container [2021-02-23 17:55:24,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:55:24" (2/3) ... [2021-02-23 17:55:24,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b49a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:55:24, skipping insertion in model container [2021-02-23 17:55:24,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:55:24" (3/3) ... [2021-02-23 17:55:24,716 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-1.c [2021-02-23 17:55:24,765 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 17:55:24,773 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 17:55:24,808 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 17:55:24,828 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 17:55:24,828 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 17:55:24,828 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 17:55:24,828 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 17:55:24,829 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 17:55:24,829 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 17:55:24,829 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 17:55:24,829 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 17:55:24,843 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2021-02-23 17:55:24,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-23 17:55:24,851 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:55:24,852 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] [2021-02-23 17:55:24,853 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:55:24,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:55:24,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1173118509, now seen corresponding path program 1 times [2021-02-23 17:55:24,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:55:24,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332200485] [2021-02-23 17:55:24,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:55:24,944 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:55:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:25,078 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:25,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:25,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:25,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:25,095 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:25,095 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:25,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:25,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:25,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:55:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:25,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:25,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:25,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:55:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:25,185 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:25,186 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:25,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:25,187 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:25,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:55:25,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332200485] [2021-02-23 17:55:25,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:55:25,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 17:55:25,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030319933] [2021-02-23 17:55:25,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 17:55:25,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:55:25,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 17:55:25,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 17:55:25,234 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 6 states. [2021-02-23 17:55:25,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:55:25,597 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-02-23 17:55:25,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 17:55:25,599 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-02-23 17:55:25,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:55:25,609 INFO L225 Difference]: With dead ends: 57 [2021-02-23 17:55:25,609 INFO L226 Difference]: Without dead ends: 40 [2021-02-23 17:55:25,613 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 [2021-02-23 17:55:25,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-02-23 17:55:25,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-02-23 17:55:25,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-02-23 17:55:25,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-02-23 17:55:25,682 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 24 [2021-02-23 17:55:25,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:55:25,683 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-02-23 17:55:25,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 17:55:25,683 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-02-23 17:55:25,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-23 17:55:25,685 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:55:25,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:55:25,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 17:55:25,686 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:55:25,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:55:25,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1864116387, now seen corresponding path program 1 times [2021-02-23 17:55:25,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:55:25,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860127166] [2021-02-23 17:55:25,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:55:25,691 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:55:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:25,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:25,740 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:25,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:25,742 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:25,746 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:25,747 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:25,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:55:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:25,790 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:25,791 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:25,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:55:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:25,830 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:25,832 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:25,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:25,844 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:25,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:25,874 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:25,875 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:25,885 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:25,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:55:25,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860127166] [2021-02-23 17:55:25,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:55:25,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 17:55:25,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418751780] [2021-02-23 17:55:25,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 17:55:25,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:55:25,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 17:55:25,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-23 17:55:25,904 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 8 states. [2021-02-23 17:55:26,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:55:26,244 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2021-02-23 17:55:26,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 17:55:26,244 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2021-02-23 17:55:26,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:55:26,246 INFO L225 Difference]: With dead ends: 53 [2021-02-23 17:55:26,246 INFO L226 Difference]: Without dead ends: 47 [2021-02-23 17:55:26,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-02-23 17:55:26,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-23 17:55:26,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-02-23 17:55:26,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-23 17:55:26,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-02-23 17:55:26,265 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 32 [2021-02-23 17:55:26,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:55:26,265 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-02-23 17:55:26,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 17:55:26,266 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-02-23 17:55:26,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-23 17:55:26,267 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:55:26,268 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:55:26,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 17:55:26,268 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:55:26,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:55:26,269 INFO L82 PathProgramCache]: Analyzing trace with hash -555146259, now seen corresponding path program 1 times [2021-02-23 17:55:26,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:55:26,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965244030] [2021-02-23 17:55:26,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:55:26,272 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:55:26,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:26,312 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:26,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:26,314 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:26,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:26,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:26,319 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:26,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:55:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:26,384 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:26,385 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:26,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:55:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:26,404 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:26,405 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:26,412 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:26,413 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:26,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:26,457 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:26,460 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:26,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:26,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:26,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:26,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:26,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:26,513 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:26,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-23 17:55:26,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965244030] [2021-02-23 17:55:26,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:55:26,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 17:55:26,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68877431] [2021-02-23 17:55:26,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 17:55:26,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:55:26,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 17:55:26,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-02-23 17:55:26,542 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 9 states. [2021-02-23 17:55:26,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:55:26,975 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2021-02-23 17:55:26,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 17:55:26,976 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2021-02-23 17:55:26,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:55:26,981 INFO L225 Difference]: With dead ends: 63 [2021-02-23 17:55:26,981 INFO L226 Difference]: Without dead ends: 57 [2021-02-23 17:55:26,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-02-23 17:55:26,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-02-23 17:55:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2021-02-23 17:55:27,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-23 17:55:27,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-02-23 17:55:27,007 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 40 [2021-02-23 17:55:27,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:55:27,008 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-02-23 17:55:27,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 17:55:27,009 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-02-23 17:55:27,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-23 17:55:27,013 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:55:27,013 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2021-02-23 17:55:27,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 17:55:27,013 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:55:27,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:55:27,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1338353437, now seen corresponding path program 1 times [2021-02-23 17:55:27,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:55:27,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319668683] [2021-02-23 17:55:27,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:55:27,021 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:55:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:27,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:27,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:27,095 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:27,095 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:27,100 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:27,100 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:27,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:55:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:27,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:27,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:27,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:55:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:27,185 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:27,186 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:27,195 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:27,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:27,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:27,234 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:27,235 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:27,243 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:27,243 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:27,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:27,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:27,268 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:27,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:27,270 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:27,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:27,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:27,302 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:27,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:27,311 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:27,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-23 17:55:27,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319668683] [2021-02-23 17:55:27,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:55:27,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 17:55:27,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841580622] [2021-02-23 17:55:27,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 17:55:27,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:55:27,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 17:55:27,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-23 17:55:27,339 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 10 states. [2021-02-23 17:55:27,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:55:27,830 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2021-02-23 17:55:27,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 17:55:27,831 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2021-02-23 17:55:27,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:55:27,833 INFO L225 Difference]: With dead ends: 73 [2021-02-23 17:55:27,833 INFO L226 Difference]: Without dead ends: 67 [2021-02-23 17:55:27,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-02-23 17:55:27,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-02-23 17:55:27,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2021-02-23 17:55:27,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-02-23 17:55:27,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-02-23 17:55:27,850 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 48 [2021-02-23 17:55:27,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:55:27,850 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-02-23 17:55:27,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 17:55:27,850 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-02-23 17:55:27,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-23 17:55:27,852 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:55:27,852 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2021-02-23 17:55:27,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 17:55:27,852 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:55:27,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:55:27,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1307231661, now seen corresponding path program 2 times [2021-02-23 17:55:27,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:55:27,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897731378] [2021-02-23 17:55:27,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:55:27,856 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:55:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:27,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:27,883 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:27,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:27,884 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:27,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:27,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:27,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:55:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:27,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:27,918 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:27,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:55:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:27,935 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:27,935 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:27,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:27,942 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:27,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:27,962 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:27,963 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:27,970 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:27,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:27,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:27,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:27,991 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:27,992 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:27,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:28,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:28,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:28,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:28,012 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:28,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:28,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:28,028 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:28,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:28,029 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:28,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-02-23 17:55:28,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897731378] [2021-02-23 17:55:28,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:55:28,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-23 17:55:28,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738062529] [2021-02-23 17:55:28,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 17:55:28,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:55:28,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 17:55:28,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-23 17:55:28,065 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 11 states. [2021-02-23 17:55:28,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:55:28,542 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2021-02-23 17:55:28,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 17:55:28,542 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2021-02-23 17:55:28,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:55:28,544 INFO L225 Difference]: With dead ends: 83 [2021-02-23 17:55:28,544 INFO L226 Difference]: Without dead ends: 77 [2021-02-23 17:55:28,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-02-23 17:55:28,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-02-23 17:55:28,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2021-02-23 17:55:28,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-23 17:55:28,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-02-23 17:55:28,564 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 56 [2021-02-23 17:55:28,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:55:28,565 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-02-23 17:55:28,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 17:55:28,565 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-02-23 17:55:28,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-02-23 17:55:28,567 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:55:28,567 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-02-23 17:55:28,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 17:55:28,567 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:55:28,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:55:28,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1431419613, now seen corresponding path program 2 times [2021-02-23 17:55:28,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:55:28,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46425645] [2021-02-23 17:55:28,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:55:28,570 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:55:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:55:28,583 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:55:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:55:28,596 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:55:28,624 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 17:55:28,625 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 17:55:28,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 17:55:28,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:55:28 BoogieIcfgContainer [2021-02-23 17:55:28,643 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 17:55:28,644 INFO L168 Benchmark]: Toolchain (without parser) took 4726.32 ms. Allocated memory was 151.0 MB in the beginning and 191.9 MB in the end (delta: 40.9 MB). Free memory was 127.2 MB in the beginning and 85.5 MB in the end (delta: 41.7 MB). Peak memory consumption was 82.8 MB. Max. memory is 8.0 GB. [2021-02-23 17:55:28,645 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 126.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 17:55:28,645 INFO L168 Benchmark]: CACSL2BoogieTranslator took 223.46 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 17:55:28,646 INFO L168 Benchmark]: Boogie Preprocessor took 32.63 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 17:55:28,647 INFO L168 Benchmark]: RCFGBuilder took 516.97 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 101.0 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-23 17:55:28,647 INFO L168 Benchmark]: TraceAbstraction took 3934.05 ms. Allocated memory was 151.0 MB in the beginning and 191.9 MB in the end (delta: 40.9 MB). Free memory was 100.5 MB in the beginning and 85.5 MB in the end (delta: 15.0 MB). Peak memory consumption was 56.6 MB. Max. memory is 8.0 GB. [2021-02-23 17:55:28,650 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 126.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 223.46 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.63 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 516.97 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 101.0 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3934.05 ms. Allocated memory was 151.0 MB in the beginning and 191.9 MB in the end (delta: 40.9 MB). Free memory was 100.5 MB in the beginning and 85.5 MB in the end (delta: 15.0 MB). Peak memory consumption was 56.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 23]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] int input = 5; [L21] CALL, EXPR id(input) [L10] COND FALSE !(x==0) [L11] CALL, EXPR id2(x-1) [L15] COND FALSE !(x==0) [L16] CALL, EXPR id(x-1) [L10] COND FALSE !(x==0) [L11] CALL, EXPR id2(x-1) [L15] COND FALSE !(x==0) [L16] CALL, EXPR id(x-1) [L10] COND FALSE !(x==0) [L11] CALL, EXPR id2(x-1) [L15] COND TRUE x==0 [L15] return 0; [L11] RET, EXPR id2(x-1) [L11] return id2(x-1) + 1; [L16] RET, EXPR id(x-1) [L16] return id(x-1) + 1; [L11] RET, EXPR id2(x-1) [L11] return id2(x-1) + 1; [L16] RET, EXPR id(x-1) [L16] return id(x-1) + 1; [L11] RET, EXPR id2(x-1) [L11] return id2(x-1) + 1; [L21] RET, EXPR id(input) [L21] int result = id(input); [L22] COND TRUE result == 5 [L23] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.8s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 170 SDtfs, 287 SDslu, 356 SDs, 0 SdLazy, 608 SolverSat, 81 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 38 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...