/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 08:52:31,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 08:52:31,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 08:52:31,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 08:52:31,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 08:52:31,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 08:52:31,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 08:52:31,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 08:52:31,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 08:52:31,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 08:52:31,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 08:52:31,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 08:52:31,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 08:52:31,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 08:52:31,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 08:52:31,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 08:52:31,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 08:52:31,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 08:52:31,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 08:52:31,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 08:52:31,222 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 08:52:31,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 08:52:31,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 08:52:31,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 08:52:31,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 08:52:31,228 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 08:52:31,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 08:52:31,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 08:52:31,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 08:52:31,236 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 08:52:31,244 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 08:52:31,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 08:52:31,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 08:52:31,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 08:52:31,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 08:52:31,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 08:52:31,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 08:52:31,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 08:52:31,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 08:52:31,247 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 08:52:31,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 08:52:31,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 08:52:31,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 08:52:31,247 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 08:52:31,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 08:52:31,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 08:52:31,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 08:52:31,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 08:52:31,248 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 08:52:31,248 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 08:52:31,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 08:52:31,248 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 08:52:31,248 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 08:52:31,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 08:52:31,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 08:52:31,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 08:52:31,470 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 08:52:31,470 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 08:52:31,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2022-03-19 08:52:31,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3e3ecd8c/e93b6d2d2eac4ba1bb47decb6e80c719/FLAGc16e6ee46 [2022-03-19 08:52:31,905 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 08:52:31,905 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2022-03-19 08:52:31,910 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3e3ecd8c/e93b6d2d2eac4ba1bb47decb6e80c719/FLAGc16e6ee46 [2022-03-19 08:52:31,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3e3ecd8c/e93b6d2d2eac4ba1bb47decb6e80c719 [2022-03-19 08:52:31,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 08:52:31,920 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 08:52:31,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 08:52:31,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 08:52:31,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 08:52:31,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 08:52:31" (1/1) ... [2022-03-19 08:52:31,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e9d79aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:52:31, skipping insertion in model container [2022-03-19 08:52:31,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 08:52:31" (1/1) ... [2022-03-19 08:52:31,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 08:52:31,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 08:52:32,092 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c[619,632] [2022-03-19 08:52:32,106 WARN L1550 CHandler]: Possible shadowing of function min [2022-03-19 08:52:32,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 08:52:32,123 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 08:52:32,131 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c[619,632] [2022-03-19 08:52:32,138 WARN L1550 CHandler]: Possible shadowing of function min [2022-03-19 08:52:32,146 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 08:52:32,156 INFO L208 MainTranslator]: Completed translation [2022-03-19 08:52:32,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:52:32 WrapperNode [2022-03-19 08:52:32,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 08:52:32,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 08:52:32,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 08:52:32,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 08:52:32,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:52:32" (1/1) ... [2022-03-19 08:52:32,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:52:32" (1/1) ... [2022-03-19 08:52:32,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:52:32" (1/1) ... [2022-03-19 08:52:32,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:52:32" (1/1) ... [2022-03-19 08:52:32,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:52:32" (1/1) ... [2022-03-19 08:52:32,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:52:32" (1/1) ... [2022-03-19 08:52:32,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:52:32" (1/1) ... [2022-03-19 08:52:32,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 08:52:32,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 08:52:32,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 08:52:32,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 08:52:32,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:52:32" (1/1) ... [2022-03-19 08:52:32,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 08:52:32,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:52:32,237 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 08:52:32,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 08:52:32,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 08:52:32,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 08:52:32,276 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 08:52:32,276 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 08:52:32,276 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 08:52:32,276 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-03-19 08:52:32,276 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2022-03-19 08:52:32,276 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2022-03-19 08:52:32,276 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2022-03-19 08:52:32,276 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2022-03-19 08:52:32,276 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2022-03-19 08:52:32,276 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 08:52:32,276 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-03-19 08:52:32,277 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-03-19 08:52:32,277 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-03-19 08:52:32,277 INFO L130 BoogieDeclarations]: Found specification of procedure free [2022-03-19 08:52:32,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 08:52:32,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-03-19 08:52:32,277 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 08:52:32,277 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 08:52:32,277 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 08:52:32,277 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 08:52:32,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 08:52:32,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 08:52:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-03-19 08:52:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-19 08:52:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 08:52:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-03-19 08:52:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure min [2022-03-19 08:52:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-03-19 08:52:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2022-03-19 08:52:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 08:52:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 08:52:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2022-03-19 08:52:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure size [2022-03-19 08:52:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure task [2022-03-19 08:52:32,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-19 08:52:32,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-03-19 08:52:32,279 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 08:52:32,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 08:52:32,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 08:52:32,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 08:52:32,377 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 08:52:32,378 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 08:52:32,561 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 08:52:32,566 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 08:52:32,567 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 08:52:32,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 08:52:32 BoogieIcfgContainer [2022-03-19 08:52:32,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 08:52:32,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 08:52:32,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 08:52:32,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 08:52:32,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 08:52:31" (1/3) ... [2022-03-19 08:52:32,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@618318c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 08:52:32, skipping insertion in model container [2022-03-19 08:52:32,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:52:32" (2/3) ... [2022-03-19 08:52:32,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@618318c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 08:52:32, skipping insertion in model container [2022-03-19 08:52:32,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 08:52:32" (3/3) ... [2022-03-19 08:52:32,574 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2022-03-19 08:52:32,577 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 08:52:32,577 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 08:52:32,606 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 08:52:32,610 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 08:52:32,610 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 08:52:32,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 59 states have internal predecessors, (71), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 08:52:32,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 08:52:32,633 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:52:32,634 INFO L500 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:52:32,634 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:52:32,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:52:32,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1536185801, now seen corresponding path program 1 times [2022-03-19 08:52:32,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:52:32,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [91103252] [2022-03-19 08:52:32,650 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:52:32,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1536185801, now seen corresponding path program 2 times [2022-03-19 08:52:32,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:52:32,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060337304] [2022-03-19 08:52:32,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:52:32,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:52:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:32,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:52:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:32,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 08:52:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:32,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 08:52:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:32,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 08:52:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:32,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 08:52:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:32,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 08:52:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:32,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 08:52:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:52:32,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:52:32,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060337304] [2022-03-19 08:52:32,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060337304] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:52:32,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:52:32,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 08:52:32,851 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:52:32,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [91103252] [2022-03-19 08:52:32,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [91103252] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:52:32,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:52:32,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 08:52:32,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402020592] [2022-03-19 08:52:32,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:52:32,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 08:52:32,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:52:32,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 08:52:32,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 08:52:32,875 INFO L87 Difference]: Start difference. First operand has 96 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 59 states have internal predecessors, (71), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 08:52:33,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:52:33,191 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2022-03-19 08:52:33,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 08:52:33,194 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-03-19 08:52:33,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:52:33,200 INFO L225 Difference]: With dead ends: 168 [2022-03-19 08:52:33,200 INFO L226 Difference]: Without dead ends: 95 [2022-03-19 08:52:33,203 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-19 08:52:33,205 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 167 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:52:33,205 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 80 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:52:33,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-19 08:52:33,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2022-03-19 08:52:33,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 25 states have call successors, (25), 11 states have call predecessors, (25), 9 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 08:52:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2022-03-19 08:52:33,253 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 44 [2022-03-19 08:52:33,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:52:33,253 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2022-03-19 08:52:33,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 08:52:33,253 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2022-03-19 08:52:33,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 08:52:33,255 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:52:33,255 INFO L500 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:52:33,256 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 08:52:33,256 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:52:33,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:52:33,256 INFO L85 PathProgramCache]: Analyzing trace with hash -152757941, now seen corresponding path program 1 times [2022-03-19 08:52:33,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:52:33,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [501206687] [2022-03-19 08:52:33,257 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:52:33,257 INFO L85 PathProgramCache]: Analyzing trace with hash -152757941, now seen corresponding path program 2 times [2022-03-19 08:52:33,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:52:33,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559695970] [2022-03-19 08:52:33,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:52:33,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:52:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:33,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:52:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:33,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 08:52:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:33,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 08:52:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:33,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 08:52:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:33,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 08:52:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:33,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 08:52:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:33,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 08:52:33,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:52:33,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:52:33,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559695970] [2022-03-19 08:52:33,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559695970] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:52:33,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:52:33,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 08:52:33,462 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:52:33,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [501206687] [2022-03-19 08:52:33,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [501206687] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:52:33,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:52:33,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 08:52:33,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167032312] [2022-03-19 08:52:33,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:52:33,464 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 08:52:33,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:52:33,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 08:52:33,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-19 08:52:33,464 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 08:52:33,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:52:33,900 INFO L93 Difference]: Finished difference Result 154 states and 197 transitions. [2022-03-19 08:52:33,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 08:52:33,900 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2022-03-19 08:52:33,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:52:33,902 INFO L225 Difference]: With dead ends: 154 [2022-03-19 08:52:33,902 INFO L226 Difference]: Without dead ends: 97 [2022-03-19 08:52:33,903 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-03-19 08:52:33,904 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 98 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:52:33,904 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 79 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:52:33,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-19 08:52:33,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2022-03-19 08:52:33,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2022-03-19 08:52:33,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2022-03-19 08:52:33,920 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 44 [2022-03-19 08:52:33,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:52:33,921 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2022-03-19 08:52:33,921 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 08:52:33,921 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2022-03-19 08:52:33,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 08:52:33,922 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:52:33,922 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:52:33,922 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 08:52:33,923 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:52:33,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:52:33,924 INFO L85 PathProgramCache]: Analyzing trace with hash 2001282500, now seen corresponding path program 1 times [2022-03-19 08:52:33,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:52:33,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [497446157] [2022-03-19 08:52:33,926 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:52:33,927 INFO L85 PathProgramCache]: Analyzing trace with hash 2001282500, now seen corresponding path program 2 times [2022-03-19 08:52:33,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:52:33,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009756346] [2022-03-19 08:52:33,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:52:33,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:52:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:34,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:52:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:34,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 08:52:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:34,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 08:52:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:34,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 08:52:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:34,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 08:52:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:34,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 08:52:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:34,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 08:52:34,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:34,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-19 08:52:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:34,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 08:52:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 08:52:34,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:52:34,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009756346] [2022-03-19 08:52:34,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009756346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:52:34,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375320624] [2022-03-19 08:52:34,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:52:34,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:52:34,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:52:34,193 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:52:34,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 08:52:34,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:52:34,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:52:34,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 08:52:34,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:52:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 08:52:34,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:52:34,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 08:52:34,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375320624] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:52:34,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:52:34,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 15 [2022-03-19 08:52:34,757 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:52:34,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [497446157] [2022-03-19 08:52:34,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [497446157] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:52:34,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:52:34,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 08:52:34,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35008529] [2022-03-19 08:52:34,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:52:34,759 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 08:52:34,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:52:34,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 08:52:34,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-03-19 08:52:34,759 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 7 states have internal predecessors, (32), 6 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-19 08:52:35,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:52:35,366 INFO L93 Difference]: Finished difference Result 164 states and 209 transitions. [2022-03-19 08:52:35,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 08:52:35,367 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 7 states have internal predecessors, (32), 6 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 56 [2022-03-19 08:52:35,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:52:35,373 INFO L225 Difference]: With dead ends: 164 [2022-03-19 08:52:35,377 INFO L226 Difference]: Without dead ends: 96 [2022-03-19 08:52:35,380 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-03-19 08:52:35,381 INFO L912 BasicCegarLoop]: 70 mSDtfsCounter, 175 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 08:52:35,381 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 84 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 08:52:35,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-19 08:52:35,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2022-03-19 08:52:35,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (28), 23 states have call predecessors, (28), 23 states have call successors, (28) [2022-03-19 08:52:35,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2022-03-19 08:52:35,395 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 56 [2022-03-19 08:52:35,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:52:35,395 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2022-03-19 08:52:35,395 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 7 states have internal predecessors, (32), 6 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-19 08:52:35,395 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2022-03-19 08:52:35,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-19 08:52:35,402 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:52:35,402 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:52:35,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 08:52:35,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:52:35,620 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:52:35,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:52:35,620 INFO L85 PathProgramCache]: Analyzing trace with hash 921875361, now seen corresponding path program 1 times [2022-03-19 08:52:35,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:52:35,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1127219973] [2022-03-19 08:52:35,621 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:52:35,621 INFO L85 PathProgramCache]: Analyzing trace with hash 921875361, now seen corresponding path program 2 times [2022-03-19 08:52:35,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:52:35,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255990342] [2022-03-19 08:52:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:52:35,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:52:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:35,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:52:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:35,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 08:52:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:35,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 08:52:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:35,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:52:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:35,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 08:52:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:35,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-19 08:52:35,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:35,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 08:52:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:35,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 08:52:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:35,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-03-19 08:52:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:35,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-03-19 08:52:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:35,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-19 08:52:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-19 08:52:35,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:52:35,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255990342] [2022-03-19 08:52:35,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255990342] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:52:35,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:52:35,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 08:52:35,791 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:52:35,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1127219973] [2022-03-19 08:52:35,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1127219973] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:52:35,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:52:35,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 08:52:35,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402031480] [2022-03-19 08:52:35,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:52:35,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 08:52:35,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:52:35,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 08:52:35,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-03-19 08:52:35,792 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (14), 7 states have call predecessors, (14), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 08:52:36,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:52:36,289 INFO L93 Difference]: Finished difference Result 163 states and 208 transitions. [2022-03-19 08:52:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 08:52:36,290 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (14), 7 states have call predecessors, (14), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 66 [2022-03-19 08:52:36,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:52:36,292 INFO L225 Difference]: With dead ends: 163 [2022-03-19 08:52:36,292 INFO L226 Difference]: Without dead ends: 98 [2022-03-19 08:52:36,293 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-03-19 08:52:36,296 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 133 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 08:52:36,297 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 82 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 08:52:36,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-19 08:52:36,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2022-03-19 08:52:36,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 59 states have internal predecessors, (64), 25 states have call successors, (25), 11 states have call predecessors, (25), 12 states have return successors, (30), 23 states have call predecessors, (30), 23 states have call successors, (30) [2022-03-19 08:52:36,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2022-03-19 08:52:36,320 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 66 [2022-03-19 08:52:36,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:52:36,320 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2022-03-19 08:52:36,320 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (14), 7 states have call predecessors, (14), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 08:52:36,320 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2022-03-19 08:52:36,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 08:52:36,322 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:52:36,322 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 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] [2022-03-19 08:52:36,322 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 08:52:36,322 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:52:36,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:52:36,322 INFO L85 PathProgramCache]: Analyzing trace with hash 940648973, now seen corresponding path program 1 times [2022-03-19 08:52:36,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:52:36,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1552836566] [2022-03-19 08:52:36,323 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:52:36,323 INFO L85 PathProgramCache]: Analyzing trace with hash 940648973, now seen corresponding path program 2 times [2022-03-19 08:52:36,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:52:36,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856136979] [2022-03-19 08:52:36,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:52:36,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:52:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:36,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:52:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:36,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 08:52:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:36,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 08:52:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:36,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:52:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:36,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 08:52:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:36,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 08:52:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:36,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 08:52:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:36,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-19 08:52:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:36,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 08:52:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:36,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 08:52:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:36,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-19 08:52:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:36,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-19 08:52:36,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:36,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-03-19 08:52:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:52:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-19 08:52:36,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:52:36,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856136979] [2022-03-19 08:52:36,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856136979] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:52:36,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:52:36,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 08:52:36,504 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:52:36,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1552836566] [2022-03-19 08:52:36,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1552836566] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:52:36,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:52:36,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 08:52:36,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665604766] [2022-03-19 08:52:36,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:52:36,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 08:52:36,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:52:36,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 08:52:36,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-03-19 08:52:36,506 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 5 states have call successors, (16), 7 states have call predecessors, (16), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-19 08:52:37,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:52:37,005 INFO L93 Difference]: Finished difference Result 151 states and 192 transitions. [2022-03-19 08:52:37,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 08:52:37,006 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 5 states have call successors, (16), 7 states have call predecessors, (16), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 79 [2022-03-19 08:52:37,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:52:37,007 INFO L225 Difference]: With dead ends: 151 [2022-03-19 08:52:37,007 INFO L226 Difference]: Without dead ends: 98 [2022-03-19 08:52:37,007 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-03-19 08:52:37,008 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 162 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:52:37,008 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 82 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:52:37,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-19 08:52:37,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2022-03-19 08:52:37,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 61 states have internal predecessors, (65), 25 states have call successors, (25), 11 states have call predecessors, (25), 13 states have return successors, (33), 23 states have call predecessors, (33), 23 states have call successors, (33) [2022-03-19 08:52:37,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2022-03-19 08:52:37,017 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 79 [2022-03-19 08:52:37,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:52:37,018 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2022-03-19 08:52:37,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 5 states have call successors, (16), 7 states have call predecessors, (16), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-19 08:52:37,018 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2022-03-19 08:52:37,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-19 08:52:37,019 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:52:37,019 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-03-19 08:52:37,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-19 08:52:37,019 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:52:37,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:52:37,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1677199096, now seen corresponding path program 1 times [2022-03-19 08:52:37,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:52:37,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [835722101] [2022-03-19 08:52:37,020 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:52:37,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1677199096, now seen corresponding path program 2 times [2022-03-19 08:52:37,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:52:37,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666290968] [2022-03-19 08:52:37,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:52:37,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:52:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:52:37,073 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:52:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:52:37,124 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:52:37,124 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-19 08:52:37,125 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-19 08:52:37,127 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 08:52:37,128 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-19 08:52:37,131 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2] [2022-03-19 08:52:37,133 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 08:52:37,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 08:52:37 BoogieIcfgContainer [2022-03-19 08:52:37,151 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 08:52:37,152 INFO L158 Benchmark]: Toolchain (without parser) took 5231.31ms. Allocated memory was 192.9MB in the beginning and 285.2MB in the end (delta: 92.3MB). Free memory was 136.4MB in the beginning and 221.7MB in the end (delta: -85.3MB). Peak memory consumption was 7.9MB. Max. memory is 8.0GB. [2022-03-19 08:52:37,152 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 192.9MB. Free memory was 152.8MB in the beginning and 152.7MB in the end (delta: 71.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 08:52:37,153 INFO L158 Benchmark]: CACSL2BoogieTranslator took 235.49ms. Allocated memory was 192.9MB in the beginning and 285.2MB in the end (delta: 92.3MB). Free memory was 136.2MB in the beginning and 253.5MB in the end (delta: -117.4MB). Peak memory consumption was 8.7MB. Max. memory is 8.0GB. [2022-03-19 08:52:37,153 INFO L158 Benchmark]: Boogie Preprocessor took 30.62ms. Allocated memory is still 285.2MB. Free memory was 253.5MB in the beginning and 251.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-19 08:52:37,153 INFO L158 Benchmark]: RCFGBuilder took 379.79ms. Allocated memory is still 285.2MB. Free memory was 251.4MB in the beginning and 232.6MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. [2022-03-19 08:52:37,153 INFO L158 Benchmark]: TraceAbstraction took 4582.01ms. Allocated memory is still 285.2MB. Free memory was 231.9MB in the beginning and 221.7MB in the end (delta: 10.2MB). Peak memory consumption was 11.7MB. Max. memory is 8.0GB. [2022-03-19 08:52:37,154 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 192.9MB. Free memory was 152.8MB in the beginning and 152.7MB in the end (delta: 71.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 235.49ms. Allocated memory was 192.9MB in the beginning and 285.2MB in the end (delta: 92.3MB). Free memory was 136.2MB in the beginning and 253.5MB in the end (delta: -117.4MB). Peak memory consumption was 8.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.62ms. Allocated memory is still 285.2MB. Free memory was 253.5MB in the beginning and 251.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 379.79ms. Allocated memory is still 285.2MB. Free memory was 251.4MB in the beginning and 232.6MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. * TraceAbstraction took 4582.01ms. Allocated memory is still 285.2MB. Free memory was 231.9MB in the beginning and 221.7MB in the end (delta: 10.2MB). Peak memory consumption was 11.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L105] CALL, EXPR nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L30] RET, EXPR nondet_tree() [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L31] RET, EXPR nondet_tree() [L31] n->right = nondet_tree() [L32] return n; [L105] RET, EXPR nondet_tree() [L105] CALL task(nondet_tree()) [L83] CALL, EXPR min(t) [L37] COND FALSE !(!n) [L40] EXPR n->left [L40] CALL, EXPR min(n->left) [L37] COND TRUE !n [L38] return 2147483647; [L40] RET, EXPR min(n->left) [L40] int a = min(n->left); [L41] EXPR n->right [L41] CALL, EXPR min(n->right) [L37] COND TRUE !n [L38] return 2147483647; [L41] RET, EXPR min(n->right) [L41] int b = min(n->right); [L42] COND TRUE a <= b [L42] return a; [L83] RET, EXPR min(t) [L83] int a = min(t); [L84] int b; [L86] CALL, EXPR size(t) [L78] COND FALSE !(!t) [L79] EXPR t->left [L79] CALL, EXPR size(t->left) [L78] COND TRUE !t [L78] return 0; [L79] RET, EXPR size(t->left) [L79] EXPR t->right [L79] CALL, EXPR size(t->right) [L78] COND TRUE !t [L78] return 0; [L79] RET, EXPR size(t->right) [L79] return size(t->left) + size(t->right) + 1; [L86] RET, EXPR size(t) [L86] int n = size(t); [L87] CALL assume_abort_if_not(n != 0) [L10] COND FALSE !(!cond) [L87] RET assume_abort_if_not(n != 0) [L88] EXPR, FCALL calloc(n, sizeof(int)) [L88] int *x = calloc(n, sizeof(int)); [L89] CALL tree_inorder(t, x, n) [L67] COND FALSE !(!t) [L70] EXPR t->left [L70] CALL, EXPR tree_inorder(t->left, a, i) [L67] COND TRUE !t [L68] return i; [L70] RET, EXPR tree_inorder(t->left, a, i) [L70] i = tree_inorder(t->left, a, i) [L71] EXPR i++ [L71] EXPR t->data [L71] a[i++] = t->data [L72] EXPR t->right [L72] CALL, EXPR tree_inorder(t->right, a, i) [L67] COND TRUE !t [L68] return i; [L72] RET, EXPR tree_inorder(t->right, a, i) [L72] i = tree_inorder(t->right, a, i) [L73] return i; [L89] RET tree_inorder(t, x, n) [L90] EXPR x[0] [L90] CALL __VERIFIER_assert(a == x[0]) [L16] COND TRUE !cond [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 99 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.5s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 790 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 735 mSDsluCounter, 407 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 54 mSDsCounter, 720 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3258 IncrementalHoareTripleChecker+Invalid, 3978 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 720 mSolverCounterUnsat, 353 mSDtfsCounter, 3258 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 286 GetRequests, 194 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=0, InterpolantAutomatonStates: 61, 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, 24 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-19 08:52:37,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...