/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-7968f31 [2022-03-18 01:04:38,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 01:04:38,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 01:04:38,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 01:04:38,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 01:04:38,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 01:04:38,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 01:04:38,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 01:04:38,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 01:04:38,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 01:04:38,337 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 01:04:38,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 01:04:38,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 01:04:38,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 01:04:38,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 01:04:38,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 01:04:38,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 01:04:38,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 01:04:38,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 01:04:38,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 01:04:38,345 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 01:04:38,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 01:04:38,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 01:04:38,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 01:04:38,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 01:04:38,363 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 01:04:38,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 01:04:38,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 01:04:38,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 01:04:38,373 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 01:04:38,387 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 01:04:38,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 01:04:38,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 01:04:38,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 01:04:38,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 01:04:38,391 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 01:04:38,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 01:04:38,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 01:04:38,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 01:04:38,393 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 01:04:38,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 01:04:38,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 01:04:38,393 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 01:04:38,393 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 01:04:38,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 01:04:38,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 01:04:38,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 01:04:38,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 01:04:38,394 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 01:04:38,394 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 01:04:38,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 01:04:38,394 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 01:04:38,395 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 01:04:38,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 01:04:38,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 01:04:38,584 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 01:04:38,585 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 01:04:38,585 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 01:04:38,586 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2022-03-18 01:04:38,638 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f1d1fe47/132fca2303244dc9a3849bbeb1be4f26/FLAGac27d3647 [2022-03-18 01:04:39,006 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 01:04:39,006 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2022-03-18 01:04:39,011 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f1d1fe47/132fca2303244dc9a3849bbeb1be4f26/FLAGac27d3647 [2022-03-18 01:04:39,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f1d1fe47/132fca2303244dc9a3849bbeb1be4f26 [2022-03-18 01:04:39,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 01:04:39,023 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 01:04:39,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 01:04:39,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 01:04:39,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 01:04:39,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:04:39" (1/1) ... [2022-03-18 01:04:39,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37b3161c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:04:39, skipping insertion in model container [2022-03-18 01:04:39,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:04:39" (1/1) ... [2022-03-18 01:04:39,033 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 01:04:39,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 01:04:39,245 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] [2022-03-18 01:04:39,260 WARN L1550 CHandler]: Possible shadowing of function min [2022-03-18 01:04:39,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 01:04:39,287 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 01:04:39,300 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] [2022-03-18 01:04:39,306 WARN L1550 CHandler]: Possible shadowing of function min [2022-03-18 01:04:39,315 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 01:04:39,330 INFO L208 MainTranslator]: Completed translation [2022-03-18 01:04:39,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:04:39 WrapperNode [2022-03-18 01:04:39,331 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 01:04:39,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 01:04:39,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 01:04:39,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 01:04:39,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:04:39" (1/1) ... [2022-03-18 01:04:39,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:04:39" (1/1) ... [2022-03-18 01:04:39,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:04:39" (1/1) ... [2022-03-18 01:04:39,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:04:39" (1/1) ... [2022-03-18 01:04:39,361 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:04:39" (1/1) ... [2022-03-18 01:04:39,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:04:39" (1/1) ... [2022-03-18 01:04:39,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:04:39" (1/1) ... [2022-03-18 01:04:39,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 01:04:39,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 01:04:39,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 01:04:39,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 01:04:39,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:04:39" (1/1) ... [2022-03-18 01:04:39,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 01:04:39,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:04:39,404 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) [2022-03-18 01:04:39,411 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 [2022-03-18 01:04:39,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 01:04:39,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 01:04:39,432 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 01:04:39,432 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 01:04:39,432 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 01:04:39,433 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-03-18 01:04:39,433 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2022-03-18 01:04:39,433 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2022-03-18 01:04:39,433 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2022-03-18 01:04:39,433 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2022-03-18 01:04:39,433 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2022-03-18 01:04:39,433 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 01:04:39,433 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-03-18 01:04:39,433 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-03-18 01:04:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-03-18 01:04:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure free [2022-03-18 01:04:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 01:04:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-03-18 01:04:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 01:04:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 01:04:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 01:04:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 01:04:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 01:04:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 01:04:39,435 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-03-18 01:04:39,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-18 01:04:39,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 01:04:39,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-03-18 01:04:39,435 INFO L130 BoogieDeclarations]: Found specification of procedure min [2022-03-18 01:04:39,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-03-18 01:04:39,435 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2022-03-18 01:04:39,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 01:04:39,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 01:04:39,435 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2022-03-18 01:04:39,436 INFO L130 BoogieDeclarations]: Found specification of procedure size [2022-03-18 01:04:39,436 INFO L130 BoogieDeclarations]: Found specification of procedure task [2022-03-18 01:04:39,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-18 01:04:39,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-03-18 01:04:39,436 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 01:04:39,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 01:04:39,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 01:04:39,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 01:04:39,517 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 01:04:39,518 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 01:04:39,816 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 01:04:39,822 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 01:04:39,822 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 01:04:39,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:04:39 BoogieIcfgContainer [2022-03-18 01:04:39,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 01:04:39,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 01:04:39,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 01:04:39,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 01:04:39,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 01:04:39" (1/3) ... [2022-03-18 01:04:39,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244b253e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:04:39, skipping insertion in model container [2022-03-18 01:04:39,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:04:39" (2/3) ... [2022-03-18 01:04:39,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244b253e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:04:39, skipping insertion in model container [2022-03-18 01:04:39,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:04:39" (3/3) ... [2022-03-18 01:04:39,832 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2022-03-18 01:04:39,835 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 01:04:39,836 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 01:04:39,869 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 01:04:39,879 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 [2022-03-18 01:04:39,879 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 01:04:39,891 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) [2022-03-18 01:04:39,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 01:04:39,901 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:39,902 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] [2022-03-18 01:04:39,902 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:39,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:39,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1536185801, now seen corresponding path program 1 times [2022-03-18 01:04:39,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:39,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [91944451] [2022-03-18 01:04:39,921 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:04:39,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1536185801, now seen corresponding path program 2 times [2022-03-18 01:04:39,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:39,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637258612] [2022-03-18 01:04:39,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:39,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:40,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:40,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:40,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 01:04:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:40,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 01:04:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:40,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 01:04:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:40,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-18 01:04:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:40,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 01:04:40,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:40,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 01:04:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:40,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:40,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637258612] [2022-03-18 01:04:40,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637258612] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:40,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:40,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 01:04:40,278 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:40,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [91944451] [2022-03-18 01:04:40,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [91944451] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:40,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:40,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 01:04:40,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454026049] [2022-03-18 01:04:40,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:40,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 01:04:40,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:40,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 01:04:40,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-18 01:04:40,366 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) [2022-03-18 01:04:40,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:40,732 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2022-03-18 01:04:40,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 01:04:40,735 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 [2022-03-18 01:04:40,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:40,748 INFO L225 Difference]: With dead ends: 168 [2022-03-18 01:04:40,748 INFO L226 Difference]: Without dead ends: 95 [2022-03-18 01:04:40,753 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-18 01:04:40,756 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 [2022-03-18 01:04:40,760 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] [2022-03-18 01:04:40,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-18 01:04:40,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2022-03-18 01:04:40,811 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) [2022-03-18 01:04:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2022-03-18 01:04:40,820 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 44 [2022-03-18 01:04:40,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:40,821 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2022-03-18 01:04:40,821 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) [2022-03-18 01:04:40,821 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2022-03-18 01:04:40,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 01:04:40,825 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:40,825 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] [2022-03-18 01:04:40,826 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 01:04:40,826 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:40,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:40,827 INFO L85 PathProgramCache]: Analyzing trace with hash -152757941, now seen corresponding path program 1 times [2022-03-18 01:04:40,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:40,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [495227854] [2022-03-18 01:04:40,832 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:04:40,832 INFO L85 PathProgramCache]: Analyzing trace with hash -152757941, now seen corresponding path program 2 times [2022-03-18 01:04:40,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:40,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930669124] [2022-03-18 01:04:40,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:40,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:40,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:40,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 01:04:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:40,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 01:04:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:40,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 01:04:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:40,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-18 01:04:40,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:41,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 01:04:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:41,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 01:04:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:41,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:41,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930669124] [2022-03-18 01:04:41,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930669124] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:41,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:41,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 01:04:41,066 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:41,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [495227854] [2022-03-18 01:04:41,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [495227854] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:41,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:41,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 01:04:41,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939938981] [2022-03-18 01:04:41,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:41,068 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 01:04:41,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:41,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 01:04:41,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-18 01:04:41,069 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) [2022-03-18 01:04:41,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:41,679 INFO L93 Difference]: Finished difference Result 154 states and 197 transitions. [2022-03-18 01:04:41,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 01:04:41,679 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 [2022-03-18 01:04:41,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:41,681 INFO L225 Difference]: With dead ends: 154 [2022-03-18 01:04:41,681 INFO L226 Difference]: Without dead ends: 97 [2022-03-18 01:04:41,682 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-03-18 01:04:41,683 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 98 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:41,684 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 79 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 01:04:41,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-18 01:04:41,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2022-03-18 01:04:41,699 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) [2022-03-18 01:04:41,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2022-03-18 01:04:41,700 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 44 [2022-03-18 01:04:41,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:41,700 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2022-03-18 01:04:41,701 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) [2022-03-18 01:04:41,701 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2022-03-18 01:04:41,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-18 01:04:41,702 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:41,702 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] [2022-03-18 01:04:41,702 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 01:04:41,703 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:41,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:41,703 INFO L85 PathProgramCache]: Analyzing trace with hash 2001282500, now seen corresponding path program 1 times [2022-03-18 01:04:41,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:41,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [747604472] [2022-03-18 01:04:41,704 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:04:41,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2001282500, now seen corresponding path program 2 times [2022-03-18 01:04:41,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:41,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547122394] [2022-03-18 01:04:41,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:41,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:41,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:41,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 01:04:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:41,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 01:04:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:41,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 01:04:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:41,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 01:04:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:41,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-18 01:04:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:41,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-18 01:04:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:41,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-18 01:04:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:41,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-18 01:04:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 01:04:41,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:41,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547122394] [2022-03-18 01:04:41,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547122394] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:04:41,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247611439] [2022-03-18 01:04:41,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:04:41,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:04:41,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:04:41,959 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) [2022-03-18 01:04:41,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 01:04:42,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:04:42,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:04:42,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 01:04:42,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:04:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 01:04:42,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:04:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 01:04:42,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247611439] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:04:42,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:04:42,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 15 [2022-03-18 01:04:42,694 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:42,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [747604472] [2022-03-18 01:04:42,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [747604472] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:42,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:42,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 01:04:42,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563119004] [2022-03-18 01:04:42,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:42,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 01:04:42,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:42,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 01:04:42,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-03-18 01:04:42,697 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) [2022-03-18 01:04:43,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:43,475 INFO L93 Difference]: Finished difference Result 164 states and 209 transitions. [2022-03-18 01:04:43,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 01:04:43,476 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 [2022-03-18 01:04:43,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:43,477 INFO L225 Difference]: With dead ends: 164 [2022-03-18 01:04:43,478 INFO L226 Difference]: Without dead ends: 96 [2022-03-18 01:04:43,479 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-03-18 01:04:43,480 INFO L912 BasicCegarLoop]: 70 mSDtfsCounter, 175 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:43,480 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 84 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 01:04:43,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-18 01:04:43,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2022-03-18 01:04:43,493 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) [2022-03-18 01:04:43,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2022-03-18 01:04:43,494 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 56 [2022-03-18 01:04:43,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:43,494 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2022-03-18 01:04:43,494 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) [2022-03-18 01:04:43,494 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2022-03-18 01:04:43,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-18 01:04:43,496 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:43,496 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] [2022-03-18 01:04:43,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 01:04:43,711 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 [2022-03-18 01:04:43,712 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:43,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:43,712 INFO L85 PathProgramCache]: Analyzing trace with hash 921875361, now seen corresponding path program 1 times [2022-03-18 01:04:43,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:43,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1124945194] [2022-03-18 01:04:43,713 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:04:43,713 INFO L85 PathProgramCache]: Analyzing trace with hash 921875361, now seen corresponding path program 2 times [2022-03-18 01:04:43,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:43,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609401159] [2022-03-18 01:04:43,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:43,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:43,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:43,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 01:04:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:43,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 01:04:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:43,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 01:04:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:43,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 01:04:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:43,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-18 01:04:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:43,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 01:04:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:43,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-18 01:04:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:43,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-03-18 01:04:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:43,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-03-18 01:04:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:43,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-18 01:04:43,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-18 01:04:43,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:43,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609401159] [2022-03-18 01:04:43,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609401159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:43,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:43,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 01:04:43,925 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:43,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1124945194] [2022-03-18 01:04:43,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1124945194] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:43,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:43,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 01:04:43,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082419337] [2022-03-18 01:04:43,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:43,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 01:04:43,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:43,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 01:04:43,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-03-18 01:04:43,929 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) [2022-03-18 01:04:44,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:44,636 INFO L93 Difference]: Finished difference Result 163 states and 208 transitions. [2022-03-18 01:04:44,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 01:04:44,637 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 [2022-03-18 01:04:44,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:44,638 INFO L225 Difference]: With dead ends: 163 [2022-03-18 01:04:44,638 INFO L226 Difference]: Without dead ends: 98 [2022-03-18 01:04:44,639 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 [2022-03-18 01:04:44,640 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 133 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:44,640 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 82 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 01:04:44,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-18 01:04:44,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2022-03-18 01:04:44,661 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) [2022-03-18 01:04:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2022-03-18 01:04:44,664 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 66 [2022-03-18 01:04:44,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:44,664 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2022-03-18 01:04:44,664 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) [2022-03-18 01:04:44,664 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2022-03-18 01:04:44,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-18 01:04:44,666 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:44,666 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] [2022-03-18 01:04:44,666 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 01:04:44,666 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:44,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:44,667 INFO L85 PathProgramCache]: Analyzing trace with hash 940648973, now seen corresponding path program 1 times [2022-03-18 01:04:44,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:44,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [641349312] [2022-03-18 01:04:44,668 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:04:44,668 INFO L85 PathProgramCache]: Analyzing trace with hash 940648973, now seen corresponding path program 2 times [2022-03-18 01:04:44,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:44,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990816048] [2022-03-18 01:04:44,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:44,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:44,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:44,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 01:04:44,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:44,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 01:04:44,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:44,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 01:04:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:44,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 01:04:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:44,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 01:04:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:44,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-18 01:04:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:44,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-18 01:04:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:44,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 01:04:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:44,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-18 01:04:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:44,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-18 01:04:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:44,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-18 01:04:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:44,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-03-18 01:04:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-18 01:04:44,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:44,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990816048] [2022-03-18 01:04:44,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990816048] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:44,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:44,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 01:04:44,885 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:44,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [641349312] [2022-03-18 01:04:44,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [641349312] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:44,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:44,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 01:04:44,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393984208] [2022-03-18 01:04:44,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:44,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 01:04:44,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:44,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 01:04:44,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-03-18 01:04:44,887 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) [2022-03-18 01:04:45,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:45,492 INFO L93 Difference]: Finished difference Result 151 states and 192 transitions. [2022-03-18 01:04:45,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 01:04:45,493 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 [2022-03-18 01:04:45,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:45,495 INFO L225 Difference]: With dead ends: 151 [2022-03-18 01:04:45,495 INFO L226 Difference]: Without dead ends: 98 [2022-03-18 01:04:45,496 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 [2022-03-18 01:04:45,496 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 162 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:45,497 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 82 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 01:04:45,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-18 01:04:45,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2022-03-18 01:04:45,525 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) [2022-03-18 01:04:45,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2022-03-18 01:04:45,526 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 79 [2022-03-18 01:04:45,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:45,527 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2022-03-18 01:04:45,527 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) [2022-03-18 01:04:45,527 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2022-03-18 01:04:45,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 01:04:45,528 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:45,528 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] [2022-03-18 01:04:45,529 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-18 01:04:45,529 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:45,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:45,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1677199096, now seen corresponding path program 1 times [2022-03-18 01:04:45,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:45,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1580627003] [2022-03-18 01:04:45,530 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:04:45,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1677199096, now seen corresponding path program 2 times [2022-03-18 01:04:45,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:45,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127613966] [2022-03-18 01:04:45,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:45,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:04:45,587 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:04:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:04:45,636 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:04:45,636 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-18 01:04:45,636 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-18 01:04:45,639 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 01:04:45,641 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-18 01:04:45,644 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2] [2022-03-18 01:04:45,646 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 01:04:45,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 01:04:45 BoogieIcfgContainer [2022-03-18 01:04:45,666 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 01:04:45,667 INFO L158 Benchmark]: Toolchain (without parser) took 6644.28ms. Allocated memory was 182.5MB in the beginning and 239.1MB in the end (delta: 56.6MB). Free memory was 135.3MB in the beginning and 196.0MB in the end (delta: -60.7MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 01:04:45,667 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 182.5MB. Free memory was 151.9MB in the beginning and 151.9MB in the end (delta: 71.5kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 01:04:45,667 INFO L158 Benchmark]: CACSL2BoogieTranslator took 307.39ms. Allocated memory is still 182.5MB. Free memory was 135.2MB in the beginning and 159.1MB in the end (delta: -23.9MB). Peak memory consumption was 10.6MB. Max. memory is 8.0GB. [2022-03-18 01:04:45,668 INFO L158 Benchmark]: Boogie Preprocessor took 40.37ms. Allocated memory is still 182.5MB. Free memory was 159.1MB in the beginning and 156.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 01:04:45,668 INFO L158 Benchmark]: RCFGBuilder took 451.09ms. Allocated memory is still 182.5MB. Free memory was 156.7MB in the beginning and 137.8MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. [2022-03-18 01:04:45,668 INFO L158 Benchmark]: TraceAbstraction took 5841.40ms. Allocated memory was 182.5MB in the beginning and 239.1MB in the end (delta: 56.6MB). Free memory was 137.3MB in the beginning and 196.0MB in the end (delta: -58.7MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 01:04:45,670 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 182.5MB. Free memory was 151.9MB in the beginning and 151.9MB in the end (delta: 71.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 307.39ms. Allocated memory is still 182.5MB. Free memory was 135.2MB in the beginning and 159.1MB in the end (delta: -23.9MB). Peak memory consumption was 10.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.37ms. Allocated memory is still 182.5MB. Free memory was 159.1MB in the beginning and 156.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 451.09ms. Allocated memory is still 182.5MB. Free memory was 156.7MB in the beginning and 137.8MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. * TraceAbstraction took 5841.40ms. Allocated memory was 182.5MB in the beginning and 239.1MB in the end (delta: 56.6MB). Free memory was 137.3MB in the beginning and 196.0MB in the end (delta: -58.7MB). There was no memory consumed. 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: 5.8s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 790 SdHoareTripleChecker+Valid, 2.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 735 mSDsluCounter, 407 SdHoareTripleChecker+Invalid, 1.8s 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, 1.0s 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! [2022-03-18 01:04:45,704 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...