/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-b7b32d2 [2021-02-21 20:27:46,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:27:46,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:27:46,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 20:27:46,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:27:46,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:27:46,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:27:46,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:27:46,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:27:46,813 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:27:46,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:27:46,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:27:46,825 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:27:46,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:27:46,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:27:46,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:27:46,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 20:27:46,840 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:27:46,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:27:46,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:27:46,843 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 20:27:46,857 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:27:46,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:27:46,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:27:46,859 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:27:46,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:27:46,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:27:46,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:27:46,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:27:46,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:27:46,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:27:46,861 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:27:46,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:27:46,861 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:27:46,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:27:46,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:27:46,862 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:27:46,862 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:27:46,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:27:46,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:27:46,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:27:46,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:27:46,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:27:46,863 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:27:47,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:27:47,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:27:47,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:27:47,311 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:27:47,312 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:27:47,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c [2021-02-21 20:27:47,419 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3dcb9a18/e5c48a875b394b6ab94683ce1f28d4fb/FLAGc42df67ab [2021-02-21 20:27:48,233 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:27:48,234 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c [2021-02-21 20:27:48,242 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3dcb9a18/e5c48a875b394b6ab94683ce1f28d4fb/FLAGc42df67ab [2021-02-21 20:27:48,590 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3dcb9a18/e5c48a875b394b6ab94683ce1f28d4fb [2021-02-21 20:27:48,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:27:48,608 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:27:48,611 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:27:48,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:27:48,616 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:27:48,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:27:48" (1/1) ... [2021-02-21 20:27:48,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15356c3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:27:48, skipping insertion in model container [2021-02-21 20:27:48,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:27:48" (1/1) ... [2021-02-21 20:27:48,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:27:48,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:27:48,819 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] [2021-02-21 20:27:48,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:27:48,837 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:27:48,858 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] [2021-02-21 20:27:48,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:27:48,879 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:27:48,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:27:48 WrapperNode [2021-02-21 20:27:48,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:27:48,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:27:48,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:27:48,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:27:48,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:27:48" (1/1) ... [2021-02-21 20:27:48,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:27:48" (1/1) ... [2021-02-21 20:27:48,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:27:48" (1/1) ... [2021-02-21 20:27:48,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:27:48" (1/1) ... [2021-02-21 20:27:48,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:27:48" (1/1) ... [2021-02-21 20:27:48,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:27:48" (1/1) ... [2021-02-21 20:27:48,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:27:48" (1/1) ... [2021-02-21 20:27:48,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:27:48,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:27:48,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:27:48,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:27:48,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:27:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:27:49,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:27:49,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:27:49,079 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:27:49,079 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-02-21 20:27:49,079 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2021-02-21 20:27:49,080 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:27:49,080 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 20:27:49,080 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:27:49,080 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:27:49,081 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:27:49,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:27:49,081 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-02-21 20:27:49,081 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2021-02-21 20:27:49,081 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:27:49,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:27:49,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:27:49,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:27:49,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:27:49,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:27:49,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:27:49,601 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:27:49,602 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 20:27:49,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:27:49 BoogieIcfgContainer [2021-02-21 20:27:49,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:27:49,616 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:27:49,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:27:49,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:27:49,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:27:48" (1/3) ... [2021-02-21 20:27:49,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b52a21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:27:49, skipping insertion in model container [2021-02-21 20:27:49,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:27:48" (2/3) ... [2021-02-21 20:27:49,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b52a21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:27:49, skipping insertion in model container [2021-02-21 20:27:49,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:27:49" (3/3) ... [2021-02-21 20:27:49,647 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-1.c [2021-02-21 20:27:49,667 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:27:49,684 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:27:49,748 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:27:49,873 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:27:49,876 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:27:49,876 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:27:49,877 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:27:49,877 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:27:49,877 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:27:49,877 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:27:49,877 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:27:49,912 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2021-02-21 20:27:49,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 20:27:49,933 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:27:49,934 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 20:27:49,935 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:27:49,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:27:49,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1173118509, now seen corresponding path program 1 times [2021-02-21 20:27:49,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:27:49,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943294475] [2021-02-21 20:27:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:27:50,083 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:27:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:50,390 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:50,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:27:50,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:50,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:50,432 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:50,434 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:50,457 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:50,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:27:50,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:27:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:50,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:50,655 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:27:50,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:27:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:50,678 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:50,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:27:50,681 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:50,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:50,703 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 20:27:50,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943294475] [2021-02-21 20:27:50,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:27:50,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 20:27:50,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798684772] [2021-02-21 20:27:50,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 20:27:50,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:27:50,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 20:27:50,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 20:27:50,745 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 6 states. [2021-02-21 20:27:51,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:27:51,320 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-02-21 20:27:51,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 20:27:51,322 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-02-21 20:27:51,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:27:51,333 INFO L225 Difference]: With dead ends: 57 [2021-02-21 20:27:51,334 INFO L226 Difference]: Without dead ends: 40 [2021-02-21 20:27:51,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-21 20:27:51,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-02-21 20:27:51,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-02-21 20:27:51,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-02-21 20:27:51,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-02-21 20:27:51,432 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 24 [2021-02-21 20:27:51,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:27:51,433 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-02-21 20:27:51,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 20:27:51,433 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-02-21 20:27:51,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-21 20:27:51,436 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:27:51,437 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] [2021-02-21 20:27:51,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:27:51,437 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:27:51,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:27:51,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1864116387, now seen corresponding path program 1 times [2021-02-21 20:27:51,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:27:51,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685351376] [2021-02-21 20:27:51,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:27:51,443 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:27:51,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:51,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:51,507 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:27:51,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:51,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:51,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:51,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:27:51,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:27:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:51,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:51,570 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:27:51,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:27:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:51,608 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:51,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:51,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:51,620 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:51,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:27:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:51,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:51,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:51,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:51,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:51,674 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 20:27:51,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685351376] [2021-02-21 20:27:51,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:27:51,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 20:27:51,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077854273] [2021-02-21 20:27:51,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 20:27:51,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:27:51,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 20:27:51,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-21 20:27:51,680 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 8 states. [2021-02-21 20:27:52,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:27:52,167 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2021-02-21 20:27:52,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 20:27:52,168 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2021-02-21 20:27:52,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:27:52,170 INFO L225 Difference]: With dead ends: 53 [2021-02-21 20:27:52,170 INFO L226 Difference]: Without dead ends: 47 [2021-02-21 20:27:52,172 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 [2021-02-21 20:27:52,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-21 20:27:52,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-02-21 20:27:52,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-21 20:27:52,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-02-21 20:27:52,191 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 32 [2021-02-21 20:27:52,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:27:52,191 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-02-21 20:27:52,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 20:27:52,192 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-02-21 20:27:52,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-21 20:27:52,193 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:27:52,193 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] [2021-02-21 20:27:52,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:27:52,194 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:27:52,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:27:52,195 INFO L82 PathProgramCache]: Analyzing trace with hash -555146259, now seen corresponding path program 1 times [2021-02-21 20:27:52,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:27:52,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858394369] [2021-02-21 20:27:52,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:27:52,198 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:27:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:52,285 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:52,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:27:52,290 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:52,291 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:52,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:52,299 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:27:52,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:27:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:52,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:52,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:27:52,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:27:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:52,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:52,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:52,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:52,426 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:52,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:27:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:52,468 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:52,469 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:52,478 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:52,479 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:52,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:27:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:52,500 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:52,501 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:52,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:52,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:52,525 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 20:27:52,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858394369] [2021-02-21 20:27:52,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:27:52,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 20:27:52,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950725736] [2021-02-21 20:27:52,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 20:27:52,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:27:52,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 20:27:52,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-02-21 20:27:52,528 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 9 states. [2021-02-21 20:27:52,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:27:52,983 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2021-02-21 20:27:52,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 20:27:52,984 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2021-02-21 20:27:52,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:27:52,986 INFO L225 Difference]: With dead ends: 63 [2021-02-21 20:27:52,986 INFO L226 Difference]: Without dead ends: 57 [2021-02-21 20:27:52,987 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 [2021-02-21 20:27:52,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-02-21 20:27:53,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2021-02-21 20:27:53,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-21 20:27:53,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-02-21 20:27:53,005 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 40 [2021-02-21 20:27:53,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:27:53,006 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-02-21 20:27:53,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 20:27:53,006 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-02-21 20:27:53,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-21 20:27:53,008 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:27:53,009 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] [2021-02-21 20:27:53,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:27:53,009 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:27:53,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:27:53,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1338353437, now seen corresponding path program 1 times [2021-02-21 20:27:53,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:27:53,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190101668] [2021-02-21 20:27:53,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:27:53,015 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:27:53,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:53,049 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:53,050 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:27:53,051 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:53,051 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:53,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:53,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:27:53,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:27:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:53,090 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:53,093 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:27:53,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:27:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:53,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:53,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:53,121 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:53,122 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:53,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:27:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:53,149 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:53,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:53,158 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:53,159 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:53,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:27:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:53,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:53,200 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:53,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:53,202 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:53,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:27:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:53,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:53,235 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:53,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:53,237 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-21 20:27:53,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190101668] [2021-02-21 20:27:53,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:27:53,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 20:27:53,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187527662] [2021-02-21 20:27:53,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 20:27:53,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:27:53,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 20:27:53,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-21 20:27:53,257 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 10 states. [2021-02-21 20:27:53,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:27:53,698 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2021-02-21 20:27:53,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-21 20:27:53,699 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2021-02-21 20:27:53,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:27:53,703 INFO L225 Difference]: With dead ends: 73 [2021-02-21 20:27:53,704 INFO L226 Difference]: Without dead ends: 67 [2021-02-21 20:27:53,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-02-21 20:27:53,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-02-21 20:27:53,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2021-02-21 20:27:53,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-02-21 20:27:53,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-02-21 20:27:53,748 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 48 [2021-02-21 20:27:53,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:27:53,750 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-02-21 20:27:53,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 20:27:53,751 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-02-21 20:27:53,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-21 20:27:53,755 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:27:53,756 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] [2021-02-21 20:27:53,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 20:27:53,756 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:27:53,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:27:53,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1307231661, now seen corresponding path program 2 times [2021-02-21 20:27:53,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:27:53,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075357207] [2021-02-21 20:27:53,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:27:53,762 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:27:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:53,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:53,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:27:53,799 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:53,799 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:53,804 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:53,805 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:27:53,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:27:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:53,847 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:53,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:27:53,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:27:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:53,896 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:53,898 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:53,908 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:53,909 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:53,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:27:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:53,962 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:53,964 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:53,975 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:53,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:53,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:27:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:54,008 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:54,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:54,009 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:54,010 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:54,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:27:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:54,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:54,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:54,032 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:54,032 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:54,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:27:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:27:54,050 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:54,050 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:54,051 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:27:54,052 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:27:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-02-21 20:27:54,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075357207] [2021-02-21 20:27:54,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:27:54,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-21 20:27:54,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131328767] [2021-02-21 20:27:54,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-21 20:27:54,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:27:54,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-21 20:27:54,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-21 20:27:54,075 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 11 states. [2021-02-21 20:27:54,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:27:54,622 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2021-02-21 20:27:54,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-21 20:27:54,622 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2021-02-21 20:27:54,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:27:54,624 INFO L225 Difference]: With dead ends: 83 [2021-02-21 20:27:54,624 INFO L226 Difference]: Without dead ends: 77 [2021-02-21 20:27:54,626 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 [2021-02-21 20:27:54,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-02-21 20:27:54,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2021-02-21 20:27:54,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-21 20:27:54,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-02-21 20:27:54,647 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 56 [2021-02-21 20:27:54,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:27:54,648 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-02-21 20:27:54,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-21 20:27:54,648 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-02-21 20:27:54,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-02-21 20:27:54,649 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:27:54,650 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] [2021-02-21 20:27:54,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 20:27:54,650 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:27:54,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:27:54,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1431419613, now seen corresponding path program 2 times [2021-02-21 20:27:54,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:27:54,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112932824] [2021-02-21 20:27:54,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:27:54,654 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:27:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:27:54,670 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:27:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:27:54,685 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:27:54,719 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 20:27:54,719 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 20:27:54,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 20:27:54,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:27:54 BoogieIcfgContainer [2021-02-21 20:27:54,743 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:27:54,744 INFO L168 Benchmark]: Toolchain (without parser) took 6148.57 ms. Allocated memory was 159.4 MB in the beginning and 198.2 MB in the end (delta: 38.8 MB). Free memory was 136.0 MB in the beginning and 149.1 MB in the end (delta: -13.1 MB). Peak memory consumption was 26.3 MB. Max. memory is 8.0 GB. [2021-02-21 20:27:54,745 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 159.4 MB. Free memory is still 132.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:27:54,746 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.50 ms. Allocated memory is still 159.4 MB. Free memory was 134.8 MB in the beginning and 125.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 20:27:54,746 INFO L168 Benchmark]: Boogie Preprocessor took 45.07 ms. Allocated memory is still 159.4 MB. Free memory was 125.7 MB in the beginning and 124.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 20:27:54,747 INFO L168 Benchmark]: RCFGBuilder took 682.48 ms. Allocated memory is still 159.4 MB. Free memory was 124.2 MB in the beginning and 110.0 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-21 20:27:54,748 INFO L168 Benchmark]: TraceAbstraction took 5126.16 ms. Allocated memory was 159.4 MB in the beginning and 198.2 MB in the end (delta: 38.8 MB). Free memory was 109.7 MB in the beginning and 149.1 MB in the end (delta: -39.5 MB). Peak memory consumption was 78.8 kB. Max. memory is 8.0 GB. [2021-02-21 20:27:54,751 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 159.4 MB. Free memory is still 132.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 269.50 ms. Allocated memory is still 159.4 MB. Free memory was 134.8 MB in the beginning and 125.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.07 ms. Allocated memory is still 159.4 MB. Free memory was 125.7 MB in the beginning and 124.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 682.48 ms. Allocated memory is still 159.4 MB. Free memory was 124.2 MB in the beginning and 110.0 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5126.16 ms. Allocated memory was 159.4 MB in the beginning and 198.2 MB in the end (delta: 38.8 MB). Free memory was 109.7 MB in the beginning and 149.1 MB in the end (delta: -39.5 MB). Peak memory consumption was 78.8 kB. 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: 4.8s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 2.5s, 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, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.7s 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...