/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 15:06:11,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 15:06:11,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 15:06:11,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 15:06:11,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 15:06:11,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 15:06:11,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 15:06:11,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 15:06:11,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 15:06:11,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 15:06:11,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 15:06:11,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 15:06:11,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 15:06:11,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 15:06:11,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 15:06:11,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 15:06:11,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 15:06:11,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 15:06:11,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 15:06:11,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 15:06:11,236 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 15:06:11,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 15:06:11,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 15:06:11,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 15:06:11,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 15:06:11,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 15:06:11,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 15:06:11,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 15:06:11,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 15:06:11,250 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 15:06:11,256 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 15:06:11,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 15:06:11,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 15:06:11,257 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 15:06:11,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 15:06:11,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 15:06:11,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 15:06:11,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 15:06:11,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 15:06:11,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 15:06:11,259 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 15:06:11,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 15:06:11,259 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 15:06:11,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 15:06:11,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 15:06:11,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 15:06:11,259 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 15:06:11,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 15:06:11,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 15:06:11,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 15:06:11,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 15:06:11,259 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 15:06:11,260 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 15:06:11,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 15:06:11,260 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 15:06:11,260 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 15:06:11,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 15:06:11,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 15:06:11,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 15:06:11,468 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 15:06:11,469 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 15:06:11,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2022-04-06 15:06:11,518 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7ecc0962/f122d9631083489ebe29929e7516a319/FLAG8bc39fc03 [2022-04-06 15:06:11,885 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 15:06:11,885 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2022-04-06 15:06:11,890 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7ecc0962/f122d9631083489ebe29929e7516a319/FLAG8bc39fc03 [2022-04-06 15:06:11,899 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7ecc0962/f122d9631083489ebe29929e7516a319 [2022-04-06 15:06:11,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 15:06:11,902 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 15:06:11,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 15:06:11,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 15:06:11,908 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 15:06:11,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 03:06:11" (1/1) ... [2022-04-06 15:06:11,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36a04937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:06:11, skipping insertion in model container [2022-04-06 15:06:11,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 03:06:11" (1/1) ... [2022-04-06 15:06:11,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 15:06:11,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 15:06:12,039 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] [2022-04-06 15:06:12,050 WARN L1550 CHandler]: Possible shadowing of function min [2022-04-06 15:06:12,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 15:06:12,075 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 15:06:12,082 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] [2022-04-06 15:06:12,087 WARN L1550 CHandler]: Possible shadowing of function min [2022-04-06 15:06:12,092 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 15:06:12,100 INFO L208 MainTranslator]: Completed translation [2022-04-06 15:06:12,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:06:12 WrapperNode [2022-04-06 15:06:12,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 15:06:12,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 15:06:12,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 15:06:12,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 15:06:12,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:06:12" (1/1) ... [2022-04-06 15:06:12,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:06:12" (1/1) ... [2022-04-06 15:06:12,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:06:12" (1/1) ... [2022-04-06 15:06:12,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:06:12" (1/1) ... [2022-04-06 15:06:12,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:06:12" (1/1) ... [2022-04-06 15:06:12,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:06:12" (1/1) ... [2022-04-06 15:06:12,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:06:12" (1/1) ... [2022-04-06 15:06:12,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 15:06:12,132 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 15:06:12,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 15:06:12,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 15:06:12,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:06:12" (1/1) ... [2022-04-06 15:06:12,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 15:06:12,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:12,152 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) [2022-04-06 15:06:12,159 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 [2022-04-06 15:06:12,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 15:06:12,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 15:06:12,189 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 15:06:12,189 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 15:06:12,190 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 15:06:12,190 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-04-06 15:06:12,190 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2022-04-06 15:06:12,190 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2022-04-06 15:06:12,190 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2022-04-06 15:06:12,191 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2022-04-06 15:06:12,192 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2022-04-06 15:06:12,192 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 15:06:12,192 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-04-06 15:06:12,192 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-04-06 15:06:12,193 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-04-06 15:06:12,193 INFO L130 BoogieDeclarations]: Found specification of procedure free [2022-04-06 15:06:12,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 15:06:12,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-04-06 15:06:12,193 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 15:06:12,193 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 15:06:12,193 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 15:06:12,193 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 15:06:12,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 15:06:12,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 15:06:12,193 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-04-06 15:06:12,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-04-06 15:06:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 15:06:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-04-06 15:06:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure min [2022-04-06 15:06:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-04-06 15:06:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2022-04-06 15:06:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 15:06:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 15:06:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2022-04-06 15:06:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure size [2022-04-06 15:06:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure task [2022-04-06 15:06:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 15:06:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-04-06 15:06:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 15:06:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 15:06:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 15:06:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 15:06:12,289 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 15:06:12,290 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 15:06:12,464 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 15:06:12,469 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 15:06:12,469 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 15:06:12,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 03:06:12 BoogieIcfgContainer [2022-04-06 15:06:12,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 15:06:12,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 15:06:12,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 15:06:12,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 15:06:12,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 03:06:11" (1/3) ... [2022-04-06 15:06:12,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be5ce8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 03:06:12, skipping insertion in model container [2022-04-06 15:06:12,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:06:12" (2/3) ... [2022-04-06 15:06:12,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be5ce8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 03:06:12, skipping insertion in model container [2022-04-06 15:06:12,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 03:06:12" (3/3) ... [2022-04-06 15:06:12,487 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2022-04-06 15:06:12,490 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 15:06:12,490 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 15:06:12,515 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 15:06:12,519 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 [2022-04-06 15:06:12,519 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 15:06:12,529 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) [2022-04-06 15:06:12,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 15:06:12,535 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:12,535 INFO L499 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] [2022-04-06 15:06:12,536 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:12,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:12,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1536185801, now seen corresponding path program 1 times [2022-04-06 15:06:12,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:12,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [72533056] [2022-04-06 15:06:12,550 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:06:12,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1536185801, now seen corresponding path program 2 times [2022-04-06 15:06:12,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:12,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328745751] [2022-04-06 15:06:12,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:12,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:12,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:12,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:06:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:12,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 15:06:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:12,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:06:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:12,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:06:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:12,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 15:06:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:12,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 15:06:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:12,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 15:06:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:06:12,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:12,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328745751] [2022-04-06 15:06:12,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328745751] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:12,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:12,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 15:06:12,823 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:12,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [72533056] [2022-04-06 15:06:12,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [72533056] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:12,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:12,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 15:06:12,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108618459] [2022-04-06 15:06:12,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:12,827 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 15:06:12,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:12,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 15:06:12,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 15:06:12,846 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) [2022-04-06 15:06:13,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:13,145 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2022-04-06 15:06:13,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 15:06:13,147 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 [2022-04-06 15:06:13,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:13,155 INFO L225 Difference]: With dead ends: 168 [2022-04-06 15:06:13,155 INFO L226 Difference]: Without dead ends: 95 [2022-04-06 15:06:13,158 INFO L912 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 [2022-04-06 15:06:13,161 INFO L913 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 [2022-04-06 15:06:13,161 INFO L914 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] [2022-04-06 15:06:13,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-06 15:06:13,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2022-04-06 15:06:13,191 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) [2022-04-06 15:06:13,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2022-04-06 15:06:13,193 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 44 [2022-04-06 15:06:13,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:13,194 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2022-04-06 15:06:13,194 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) [2022-04-06 15:06:13,194 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2022-04-06 15:06:13,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 15:06:13,196 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:13,196 INFO L499 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] [2022-04-06 15:06:13,196 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 15:06:13,196 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:13,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:13,197 INFO L85 PathProgramCache]: Analyzing trace with hash -152757941, now seen corresponding path program 1 times [2022-04-06 15:06:13,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:13,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1847100341] [2022-04-06 15:06:13,197 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:06:13,198 INFO L85 PathProgramCache]: Analyzing trace with hash -152757941, now seen corresponding path program 2 times [2022-04-06 15:06:13,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:13,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593802035] [2022-04-06 15:06:13,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:13,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:13,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:06:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:13,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 15:06:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:13,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:06:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:13,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:06:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:13,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 15:06:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:13,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 15:06:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:13,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 15:06:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:06:13,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:13,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593802035] [2022-04-06 15:06:13,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593802035] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:13,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:13,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 15:06:13,354 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:13,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1847100341] [2022-04-06 15:06:13,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1847100341] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:13,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:13,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 15:06:13,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318566949] [2022-04-06 15:06:13,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:13,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 15:06:13,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:13,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 15:06:13,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-04-06 15:06:13,356 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) [2022-04-06 15:06:13,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:13,821 INFO L93 Difference]: Finished difference Result 154 states and 197 transitions. [2022-04-06 15:06:13,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 15:06:13,821 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 [2022-04-06 15:06:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:13,823 INFO L225 Difference]: With dead ends: 154 [2022-04-06 15:06:13,823 INFO L226 Difference]: Without dead ends: 97 [2022-04-06 15:06:13,824 INFO L912 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 [2022-04-06 15:06:13,824 INFO L913 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, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 15:06:13,825 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 79 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 15:06:13,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-06 15:06:13,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2022-04-06 15:06:13,835 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) [2022-04-06 15:06:13,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2022-04-06 15:06:13,836 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 44 [2022-04-06 15:06:13,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:13,836 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2022-04-06 15:06:13,837 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) [2022-04-06 15:06:13,837 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2022-04-06 15:06:13,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 15:06:13,838 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:13,838 INFO L499 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] [2022-04-06 15:06:13,838 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 15:06:13,838 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:13,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:13,839 INFO L85 PathProgramCache]: Analyzing trace with hash 2001282500, now seen corresponding path program 1 times [2022-04-06 15:06:13,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:13,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [907161743] [2022-04-06 15:06:13,839 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:06:13,839 INFO L85 PathProgramCache]: Analyzing trace with hash 2001282500, now seen corresponding path program 2 times [2022-04-06 15:06:13,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:13,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082979386] [2022-04-06 15:06:13,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:13,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:13,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:06:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:13,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 15:06:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:13,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:06:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:13,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:06:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:14,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 15:06:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:14,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-06 15:06:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:14,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 15:06:14,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:14,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 15:06:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:14,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 15:06:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 15:06:14,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:14,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082979386] [2022-04-06 15:06:14,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082979386] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:06:14,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695703627] [2022-04-06 15:06:14,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:06:14,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:14,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:14,052 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) [2022-04-06 15:06:14,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 15:06:14,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:06:14,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:06:14,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 15:06:14,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:06:14,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 15:06:14,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:06:14,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 15:06:14,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695703627] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:06:14,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:06:14,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 15 [2022-04-06 15:06:14,520 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:14,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [907161743] [2022-04-06 15:06:14,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [907161743] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:14,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:14,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 15:06:14,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347330952] [2022-04-06 15:06:14,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:14,521 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 15:06:14,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:14,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 15:06:14,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-04-06 15:06:14,522 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) [2022-04-06 15:06:15,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:15,125 INFO L93 Difference]: Finished difference Result 164 states and 209 transitions. [2022-04-06 15:06:15,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 15:06:15,127 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 [2022-04-06 15:06:15,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:15,128 INFO L225 Difference]: With dead ends: 164 [2022-04-06 15:06:15,128 INFO L226 Difference]: Without dead ends: 96 [2022-04-06 15:06:15,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-04-06 15:06:15,129 INFO L913 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, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 15:06:15,130 INFO L914 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] [2022-04-06 15:06:15,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-04-06 15:06:15,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2022-04-06 15:06:15,146 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) [2022-04-06 15:06:15,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2022-04-06 15:06:15,148 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 56 [2022-04-06 15:06:15,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:15,148 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2022-04-06 15:06:15,148 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) [2022-04-06 15:06:15,148 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2022-04-06 15:06:15,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 15:06:15,151 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:15,151 INFO L499 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] [2022-04-06 15:06:15,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 15:06:15,363 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 [2022-04-06 15:06:15,363 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:15,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:15,364 INFO L85 PathProgramCache]: Analyzing trace with hash 921875361, now seen corresponding path program 1 times [2022-04-06 15:06:15,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:15,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [824736415] [2022-04-06 15:06:15,364 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:06:15,364 INFO L85 PathProgramCache]: Analyzing trace with hash 921875361, now seen corresponding path program 2 times [2022-04-06 15:06:15,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:15,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723727840] [2022-04-06 15:06:15,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:15,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:15,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:06:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:15,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 15:06:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:15,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 15:06:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:15,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:06:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:15,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 15:06:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:15,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 15:06:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:15,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 15:06:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:15,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-06 15:06:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:15,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-06 15:06:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:15,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 15:06:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:15,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 15:06:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-04-06 15:06:15,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:15,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723727840] [2022-04-06 15:06:15,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723727840] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:15,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:15,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 15:06:15,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:15,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [824736415] [2022-04-06 15:06:15,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [824736415] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:15,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:15,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 15:06:15,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379252523] [2022-04-06 15:06:15,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:15,513 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 15:06:15,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:15,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 15:06:15,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-04-06 15:06:15,514 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) [2022-04-06 15:06:15,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:15,998 INFO L93 Difference]: Finished difference Result 163 states and 208 transitions. [2022-04-06 15:06:15,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 15:06:15,999 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 [2022-04-06 15:06:15,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:16,000 INFO L225 Difference]: With dead ends: 163 [2022-04-06 15:06:16,000 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 15:06:16,001 INFO L912 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 [2022-04-06 15:06:16,001 INFO L913 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 [2022-04-06 15:06:16,002 INFO L914 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] [2022-04-06 15:06:16,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 15:06:16,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2022-04-06 15:06:16,010 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) [2022-04-06 15:06:16,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2022-04-06 15:06:16,011 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 66 [2022-04-06 15:06:16,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:16,011 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2022-04-06 15:06:16,011 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) [2022-04-06 15:06:16,011 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2022-04-06 15:06:16,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 15:06:16,012 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:16,012 INFO L499 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] [2022-04-06 15:06:16,013 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 15:06:16,013 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:16,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:16,013 INFO L85 PathProgramCache]: Analyzing trace with hash 940648973, now seen corresponding path program 1 times [2022-04-06 15:06:16,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:16,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1666594347] [2022-04-06 15:06:16,013 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:06:16,013 INFO L85 PathProgramCache]: Analyzing trace with hash 940648973, now seen corresponding path program 2 times [2022-04-06 15:06:16,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:16,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605328213] [2022-04-06 15:06:16,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:16,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:16,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:06:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:16,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 15:06:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:16,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 15:06:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:16,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:06:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:16,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 15:06:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:16,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 15:06:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:16,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-06 15:06:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:16,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 15:06:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:16,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 15:06:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:16,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-06 15:06:16,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:16,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 15:06:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:16,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 15:06:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:16,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 15:06:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 15:06:16,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:16,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605328213] [2022-04-06 15:06:16,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605328213] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:16,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:16,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 15:06:16,171 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:16,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1666594347] [2022-04-06 15:06:16,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1666594347] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:16,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:16,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 15:06:16,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780621986] [2022-04-06 15:06:16,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:16,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 15:06:16,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:16,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 15:06:16,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-04-06 15:06:16,172 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) [2022-04-06 15:06:16,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:16,610 INFO L93 Difference]: Finished difference Result 151 states and 192 transitions. [2022-04-06 15:06:16,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 15:06:16,610 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 [2022-04-06 15:06:16,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:16,612 INFO L225 Difference]: With dead ends: 151 [2022-04-06 15:06:16,612 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 15:06:16,612 INFO L912 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 [2022-04-06 15:06:16,613 INFO L913 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 [2022-04-06 15:06:16,613 INFO L914 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] [2022-04-06 15:06:16,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 15:06:16,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2022-04-06 15:06:16,622 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) [2022-04-06 15:06:16,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2022-04-06 15:06:16,622 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 79 [2022-04-06 15:06:16,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:16,623 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2022-04-06 15:06:16,623 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) [2022-04-06 15:06:16,623 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2022-04-06 15:06:16,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 15:06:16,624 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:16,624 INFO L499 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] [2022-04-06 15:06:16,624 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 15:06:16,624 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:16,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:16,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1677199096, now seen corresponding path program 1 times [2022-04-06 15:06:16,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:16,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1051274322] [2022-04-06 15:06:16,625 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:06:16,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1677199096, now seen corresponding path program 2 times [2022-04-06 15:06:16,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:16,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367126878] [2022-04-06 15:06:16,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:16,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:06:16,648 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:06:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:06:16,705 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:06:16,706 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-04-06 15:06:16,706 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-06 15:06:16,708 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 15:06:16,709 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-06 15:06:16,712 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2] [2022-04-06 15:06:16,714 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 15:06:16,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 03:06:16 BoogieIcfgContainer [2022-04-06 15:06:16,732 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 15:06:16,734 INFO L158 Benchmark]: Toolchain (without parser) took 4829.68ms. Allocated memory was 189.8MB in the beginning and 257.9MB in the end (delta: 68.2MB). Free memory was 141.4MB in the beginning and 153.6MB in the end (delta: -12.2MB). Peak memory consumption was 56.4MB. Max. memory is 8.0GB. [2022-04-06 15:06:16,734 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 189.8MB. Free memory was 158.2MB in the beginning and 158.0MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 15:06:16,734 INFO L158 Benchmark]: CACSL2BoogieTranslator took 197.66ms. Allocated memory is still 189.8MB. Free memory was 141.3MB in the beginning and 164.3MB in the end (delta: -23.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 15:06:16,736 INFO L158 Benchmark]: Boogie Preprocessor took 29.94ms. Allocated memory is still 189.8MB. Free memory was 164.3MB in the beginning and 161.8MB in the end (delta: 2.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-04-06 15:06:16,737 INFO L158 Benchmark]: RCFGBuilder took 338.37ms. Allocated memory is still 189.8MB. Free memory was 161.8MB in the beginning and 143.4MB in the end (delta: 18.5MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2022-04-06 15:06:16,737 INFO L158 Benchmark]: TraceAbstraction took 4260.37ms. Allocated memory was 189.8MB in the beginning and 257.9MB in the end (delta: 68.2MB). Free memory was 143.0MB in the beginning and 153.6MB in the end (delta: -10.7MB). Peak memory consumption was 57.9MB. Max. memory is 8.0GB. [2022-04-06 15:06:16,738 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 189.8MB. Free memory was 158.2MB in the beginning and 158.0MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 197.66ms. Allocated memory is still 189.8MB. Free memory was 141.3MB in the beginning and 164.3MB in the end (delta: -23.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.94ms. Allocated memory is still 189.8MB. Free memory was 164.3MB in the beginning and 161.8MB in the end (delta: 2.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 338.37ms. Allocated memory is still 189.8MB. Free memory was 161.8MB in the beginning and 143.4MB in the end (delta: 18.5MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * TraceAbstraction took 4260.37ms. Allocated memory was 189.8MB in the beginning and 257.9MB in the end (delta: 68.2MB). Free memory was 143.0MB in the beginning and 153.6MB in the end (delta: -10.7MB). Peak memory consumption was 57.9MB. 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: 4.2s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, 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, 1.4s 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! [2022-04-06 15:06:16,761 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...