/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-5d317bd [2022-03-19 03:07:29,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 03:07:29,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 03:07:29,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 03:07:29,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 03:07:29,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 03:07:29,840 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 03:07:29,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 03:07:29,843 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 03:07:29,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 03:07:29,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 03:07:29,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 03:07:29,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 03:07:29,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 03:07:29,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 03:07:29,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 03:07:29,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 03:07:29,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 03:07:29,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 03:07:29,861 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 03:07:29,862 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 03:07:29,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 03:07:29,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 03:07:29,865 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 03:07:29,866 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 03:07:29,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 03:07:29,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 03:07:29,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 03:07:29,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 03:07:29,880 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 03:07:29,889 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 03:07:29,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 03:07:29,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 03:07:29,892 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 03:07:29,892 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 03:07:29,892 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 03:07:29,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 03:07:29,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 03:07:29,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 03:07:29,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 03:07:29,893 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 03:07:29,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 03:07:29,893 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 03:07:29,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 03:07:29,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 03:07:29,893 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 03:07:29,893 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 03:07:29,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 03:07:29,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 03:07:29,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 03:07:29,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 03:07:29,894 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 03:07:29,894 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 03:07:29,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 03:07:29,894 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 03:07:29,894 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 03:07:30,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 03:07:30,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 03:07:30,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 03:07:30,111 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 03:07:30,114 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 03:07:30,115 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2022-03-19 03:07:30,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cf7c218d/ce2bf734d5974588b216c7353718229f/FLAG13253ab06 [2022-03-19 03:07:30,541 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 03:07:30,542 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2022-03-19 03:07:30,546 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cf7c218d/ce2bf734d5974588b216c7353718229f/FLAG13253ab06 [2022-03-19 03:07:30,556 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cf7c218d/ce2bf734d5974588b216c7353718229f [2022-03-19 03:07:30,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 03:07:30,559 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 03:07:30,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 03:07:30,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 03:07:30,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 03:07:30,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 03:07:30" (1/1) ... [2022-03-19 03:07:30,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e6656ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:30, skipping insertion in model container [2022-03-19 03:07:30,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 03:07:30" (1/1) ... [2022-03-19 03:07:30,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 03:07:30,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 03:07:30,735 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c[619,632] [2022-03-19 03:07:30,752 WARN L1550 CHandler]: Possible shadowing of function min [2022-03-19 03:07:30,761 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 03:07:30,769 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 03:07:30,780 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c[619,632] [2022-03-19 03:07:30,787 WARN L1550 CHandler]: Possible shadowing of function min [2022-03-19 03:07:30,797 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 03:07:30,813 INFO L208 MainTranslator]: Completed translation [2022-03-19 03:07:30,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:30 WrapperNode [2022-03-19 03:07:30,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 03:07:30,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 03:07:30,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 03:07:30,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 03:07:30,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:30" (1/1) ... [2022-03-19 03:07:30,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:30" (1/1) ... [2022-03-19 03:07:30,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:30" (1/1) ... [2022-03-19 03:07:30,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:30" (1/1) ... [2022-03-19 03:07:30,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:30" (1/1) ... [2022-03-19 03:07:30,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:30" (1/1) ... [2022-03-19 03:07:30,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:30" (1/1) ... [2022-03-19 03:07:30,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 03:07:30,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 03:07:30,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 03:07:30,879 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 03:07:30,881 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:30" (1/1) ... [2022-03-19 03:07:30,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 03:07:30,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:07:30,914 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 03:07:30,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 03:07:30,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 03:07:30,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 03:07:30,944 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 03:07:30,945 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 03:07:30,945 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 03:07:30,945 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-03-19 03:07:30,945 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2022-03-19 03:07:30,945 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2022-03-19 03:07:30,945 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2022-03-19 03:07:30,945 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2022-03-19 03:07:30,945 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2022-03-19 03:07:30,945 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 03:07:30,945 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-03-19 03:07:30,945 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-03-19 03:07:30,945 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-03-19 03:07:30,946 INFO L130 BoogieDeclarations]: Found specification of procedure free [2022-03-19 03:07:30,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 03:07:30,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-03-19 03:07:30,946 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 03:07:30,946 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 03:07:30,946 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 03:07:30,946 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 03:07:30,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 03:07:30,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 03:07:30,946 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-03-19 03:07:30,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-19 03:07:30,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 03:07:30,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-03-19 03:07:30,947 INFO L130 BoogieDeclarations]: Found specification of procedure min [2022-03-19 03:07:30,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-03-19 03:07:30,947 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2022-03-19 03:07:30,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 03:07:30,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 03:07:30,952 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2022-03-19 03:07:30,952 INFO L130 BoogieDeclarations]: Found specification of procedure size [2022-03-19 03:07:30,952 INFO L130 BoogieDeclarations]: Found specification of procedure task [2022-03-19 03:07:30,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-19 03:07:30,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-03-19 03:07:30,952 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 03:07:30,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 03:07:30,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 03:07:30,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 03:07:31,035 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 03:07:31,036 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 03:07:31,270 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 03:07:31,282 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 03:07:31,282 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 03:07:31,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 03:07:31 BoogieIcfgContainer [2022-03-19 03:07:31,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 03:07:31,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 03:07:31,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 03:07:31,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 03:07:31,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 03:07:30" (1/3) ... [2022-03-19 03:07:31,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca790f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 03:07:31, skipping insertion in model container [2022-03-19 03:07:31,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:30" (2/3) ... [2022-03-19 03:07:31,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca790f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 03:07:31, skipping insertion in model container [2022-03-19 03:07:31,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 03:07:31" (3/3) ... [2022-03-19 03:07:31,295 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2022-03-19 03:07:31,299 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 03:07:31,299 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 03:07:31,330 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 03:07:31,334 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 03:07:31,334 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 03:07:31,380 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 59 states have internal predecessors, (71), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 03:07:31,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 03:07:31,402 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:31,403 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:07:31,403 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:31,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:31,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1536185801, now seen corresponding path program 1 times [2022-03-19 03:07:31,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:31,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1919460377] [2022-03-19 03:07:31,434 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:31,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1536185801, now seen corresponding path program 2 times [2022-03-19 03:07:31,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:31,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577228586] [2022-03-19 03:07:31,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:31,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:31,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:07:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:31,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 03:07:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:31,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 03:07:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:31,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 03:07:31,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:31,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 03:07:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:31,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 03:07:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:31,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 03:07:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:07:31,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:07:31,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577228586] [2022-03-19 03:07:31,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577228586] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:31,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:31,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 03:07:31,835 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:07:31,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1919460377] [2022-03-19 03:07:31,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1919460377] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:31,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:31,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 03:07:31,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28546359] [2022-03-19 03:07:31,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:07:31,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 03:07:31,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:31,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 03:07:31,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 03:07:31,873 INFO L87 Difference]: Start difference. First operand has 96 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 59 states have internal predecessors, (71), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 03:07:32,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:07:32,167 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2022-03-19 03:07:32,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 03:07:32,170 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-03-19 03:07:32,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:07:32,179 INFO L225 Difference]: With dead ends: 168 [2022-03-19 03:07:32,180 INFO L226 Difference]: Without dead ends: 95 [2022-03-19 03:07:32,184 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 [2022-03-19 03:07:32,192 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 167 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 03:07:32,196 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 80 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 03:07:32,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-19 03:07:32,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2022-03-19 03:07:32,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 25 states have call successors, (25), 11 states have call predecessors, (25), 9 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 03:07:32,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2022-03-19 03:07:32,234 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 44 [2022-03-19 03:07:32,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:07:32,234 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2022-03-19 03:07:32,235 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 03:07:32,235 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2022-03-19 03:07:32,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 03:07:32,239 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:32,239 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:07:32,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 03:07:32,240 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:32,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:32,243 INFO L85 PathProgramCache]: Analyzing trace with hash -152757941, now seen corresponding path program 1 times [2022-03-19 03:07:32,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:32,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [242064573] [2022-03-19 03:07:32,247 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:32,247 INFO L85 PathProgramCache]: Analyzing trace with hash -152757941, now seen corresponding path program 2 times [2022-03-19 03:07:32,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:32,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976287128] [2022-03-19 03:07:32,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:32,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:32,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:07:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:32,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 03:07:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:32,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 03:07:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:32,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 03:07:32,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:32,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 03:07:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:32,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 03:07:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:32,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 03:07:32,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:07:32,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:07:32,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976287128] [2022-03-19 03:07:32,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976287128] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:32,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:32,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 03:07:32,461 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:07:32,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [242064573] [2022-03-19 03:07:32,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [242064573] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:32,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:32,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 03:07:32,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627984536] [2022-03-19 03:07:32,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:07:32,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 03:07:32,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:32,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 03:07:32,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-19 03:07:32,463 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 03:07:32,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:07:32,926 INFO L93 Difference]: Finished difference Result 154 states and 197 transitions. [2022-03-19 03:07:32,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 03:07:32,927 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2022-03-19 03:07:32,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:07:32,929 INFO L225 Difference]: With dead ends: 154 [2022-03-19 03:07:32,929 INFO L226 Difference]: Without dead ends: 97 [2022-03-19 03:07:32,930 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-03-19 03:07:32,930 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 98 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 03:07:32,931 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 79 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 03:07:32,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-19 03:07:32,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2022-03-19 03:07:32,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2022-03-19 03:07:32,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2022-03-19 03:07:32,945 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 44 [2022-03-19 03:07:32,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:07:32,946 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2022-03-19 03:07:32,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 03:07:32,946 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2022-03-19 03:07:32,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 03:07:32,947 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:32,947 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:07:32,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 03:07:32,947 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:32,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:32,948 INFO L85 PathProgramCache]: Analyzing trace with hash 2001282500, now seen corresponding path program 1 times [2022-03-19 03:07:32,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:32,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [263404137] [2022-03-19 03:07:32,948 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:32,949 INFO L85 PathProgramCache]: Analyzing trace with hash 2001282500, now seen corresponding path program 2 times [2022-03-19 03:07:32,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:32,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210942988] [2022-03-19 03:07:32,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:32,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:33,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:07:33,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:33,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 03:07:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:33,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 03:07:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:33,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 03:07:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:33,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 03:07:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:33,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 03:07:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:33,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 03:07:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:33,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-19 03:07:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:33,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 03:07:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 03:07:33,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:07:33,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210942988] [2022-03-19 03:07:33,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210942988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:07:33,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050291150] [2022-03-19 03:07:33,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:07:33,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:07:33,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:07:33,141 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:07:33,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 03:07:33,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:07:33,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:07:33,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 03:07:33,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:07:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 03:07:33,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:07:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 03:07:33,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050291150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:07:33,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:07:33,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 15 [2022-03-19 03:07:33,705 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:07:33,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [263404137] [2022-03-19 03:07:33,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [263404137] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:33,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:33,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 03:07:33,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134031669] [2022-03-19 03:07:33,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:07:33,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 03:07:33,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:33,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 03:07:33,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-03-19 03:07:33,709 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 7 states have internal predecessors, (32), 6 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-19 03:07:34,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:07:34,364 INFO L93 Difference]: Finished difference Result 164 states and 209 transitions. [2022-03-19 03:07:34,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 03:07:34,365 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 7 states have internal predecessors, (32), 6 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 56 [2022-03-19 03:07:34,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:07:34,367 INFO L225 Difference]: With dead ends: 164 [2022-03-19 03:07:34,367 INFO L226 Difference]: Without dead ends: 96 [2022-03-19 03:07:34,368 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-03-19 03:07:34,368 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:07:34,369 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 84 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 03:07:34,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-19 03:07:34,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2022-03-19 03:07:34,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (28), 23 states have call predecessors, (28), 23 states have call successors, (28) [2022-03-19 03:07:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2022-03-19 03:07:34,389 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 56 [2022-03-19 03:07:34,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:07:34,389 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2022-03-19 03:07:34,389 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 7 states have internal predecessors, (32), 6 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-19 03:07:34,389 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2022-03-19 03:07:34,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-19 03:07:34,395 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:34,395 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:07:34,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 03:07:34,612 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:07:34,613 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:34,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:34,613 INFO L85 PathProgramCache]: Analyzing trace with hash 921875361, now seen corresponding path program 1 times [2022-03-19 03:07:34,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:34,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1459550093] [2022-03-19 03:07:34,614 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:34,614 INFO L85 PathProgramCache]: Analyzing trace with hash 921875361, now seen corresponding path program 2 times [2022-03-19 03:07:34,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:34,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061342023] [2022-03-19 03:07:34,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:34,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:34,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:07:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:34,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 03:07:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:34,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 03:07:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:34,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:34,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 03:07:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:34,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-19 03:07:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:34,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 03:07:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:34,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 03:07:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:34,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-03-19 03:07:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:34,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-03-19 03:07:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:34,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-19 03:07:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-19 03:07:34,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:07:34,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061342023] [2022-03-19 03:07:34,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061342023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:34,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:34,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 03:07:34,833 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:07:34,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1459550093] [2022-03-19 03:07:34,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1459550093] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:34,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:34,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 03:07:34,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720887517] [2022-03-19 03:07:34,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:07:34,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 03:07:34,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:34,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 03:07:34,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-03-19 03:07:34,835 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (14), 7 states have call predecessors, (14), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 03:07:35,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:07:35,371 INFO L93 Difference]: Finished difference Result 163 states and 208 transitions. [2022-03-19 03:07:35,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 03:07:35,372 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (14), 7 states have call predecessors, (14), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 66 [2022-03-19 03:07:35,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:07:35,373 INFO L225 Difference]: With dead ends: 163 [2022-03-19 03:07:35,373 INFO L226 Difference]: Without dead ends: 98 [2022-03-19 03:07:35,374 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-03-19 03:07:35,375 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 133 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:07:35,375 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 82 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 03:07:35,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-19 03:07:35,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2022-03-19 03:07:35,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 59 states have internal predecessors, (64), 25 states have call successors, (25), 11 states have call predecessors, (25), 12 states have return successors, (30), 23 states have call predecessors, (30), 23 states have call successors, (30) [2022-03-19 03:07:35,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2022-03-19 03:07:35,385 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 66 [2022-03-19 03:07:35,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:07:35,386 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2022-03-19 03:07:35,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (14), 7 states have call predecessors, (14), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 03:07:35,386 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2022-03-19 03:07:35,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 03:07:35,387 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:35,387 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:07:35,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 03:07:35,387 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:35,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:35,387 INFO L85 PathProgramCache]: Analyzing trace with hash 940648973, now seen corresponding path program 1 times [2022-03-19 03:07:35,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:35,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [569360716] [2022-03-19 03:07:35,388 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:35,388 INFO L85 PathProgramCache]: Analyzing trace with hash 940648973, now seen corresponding path program 2 times [2022-03-19 03:07:35,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:35,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017296667] [2022-03-19 03:07:35,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:35,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:35,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:07:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:35,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 03:07:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:35,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 03:07:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:35,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:35,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 03:07:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:35,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 03:07:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:35,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 03:07:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:35,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-19 03:07:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:35,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 03:07:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:35,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 03:07:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:35,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-19 03:07:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:35,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-19 03:07:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:35,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-03-19 03:07:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-19 03:07:35,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:07:35,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017296667] [2022-03-19 03:07:35,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017296667] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:35,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:35,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 03:07:35,525 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:07:35,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [569360716] [2022-03-19 03:07:35,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [569360716] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:35,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:35,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 03:07:35,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299881508] [2022-03-19 03:07:35,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:07:35,526 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 03:07:35,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:35,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 03:07:35,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-03-19 03:07:35,527 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 5 states have call successors, (16), 7 states have call predecessors, (16), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-19 03:07:36,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:07:36,036 INFO L93 Difference]: Finished difference Result 151 states and 192 transitions. [2022-03-19 03:07:36,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 03:07:36,037 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 5 states have call successors, (16), 7 states have call predecessors, (16), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 79 [2022-03-19 03:07:36,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:07:36,038 INFO L225 Difference]: With dead ends: 151 [2022-03-19 03:07:36,038 INFO L226 Difference]: Without dead ends: 98 [2022-03-19 03:07:36,039 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-03-19 03:07:36,039 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 162 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:07:36,040 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] [2022-03-19 03:07:36,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-19 03:07:36,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2022-03-19 03:07:36,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 61 states have internal predecessors, (65), 25 states have call successors, (25), 11 states have call predecessors, (25), 13 states have return successors, (33), 23 states have call predecessors, (33), 23 states have call successors, (33) [2022-03-19 03:07:36,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2022-03-19 03:07:36,049 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 79 [2022-03-19 03:07:36,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:07:36,049 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2022-03-19 03:07:36,050 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 5 states have call successors, (16), 7 states have call predecessors, (16), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-19 03:07:36,050 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2022-03-19 03:07:36,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-19 03:07:36,050 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:36,050 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:07:36,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-19 03:07:36,051 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:36,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:36,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1677199096, now seen corresponding path program 1 times [2022-03-19 03:07:36,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:36,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [611633173] [2022-03-19 03:07:36,052 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:36,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1677199096, now seen corresponding path program 2 times [2022-03-19 03:07:36,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:36,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227000510] [2022-03-19 03:07:36,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:36,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 03:07:36,088 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 03:07:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 03:07:36,176 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 03:07:36,176 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-19 03:07:36,176 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-19 03:07:36,180 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 03:07:36,181 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-19 03:07:36,185 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2] [2022-03-19 03:07:36,188 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 03:07:36,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 03:07:36 BoogieIcfgContainer [2022-03-19 03:07:36,211 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 03:07:36,212 INFO L158 Benchmark]: Toolchain (without parser) took 5652.96ms. Allocated memory was 174.1MB in the beginning and 270.5MB in the end (delta: 96.5MB). Free memory was 115.7MB in the beginning and 91.5MB in the end (delta: 24.2MB). Peak memory consumption was 120.5MB. Max. memory is 8.0GB. [2022-03-19 03:07:36,212 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 174.1MB. Free memory is still 132.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 03:07:36,213 INFO L158 Benchmark]: CACSL2BoogieTranslator took 254.62ms. Allocated memory was 174.1MB in the beginning and 270.5MB in the end (delta: 96.5MB). Free memory was 115.5MB in the beginning and 239.4MB in the end (delta: -123.9MB). Peak memory consumption was 7.6MB. Max. memory is 8.0GB. [2022-03-19 03:07:36,213 INFO L158 Benchmark]: Boogie Preprocessor took 62.96ms. Allocated memory is still 270.5MB. Free memory was 239.4MB in the beginning and 237.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-19 03:07:36,215 INFO L158 Benchmark]: RCFGBuilder took 405.62ms. Allocated memory is still 270.5MB. Free memory was 237.3MB in the beginning and 217.3MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2022-03-19 03:07:36,215 INFO L158 Benchmark]: TraceAbstraction took 4925.10ms. Allocated memory is still 270.5MB. Free memory was 216.8MB in the beginning and 91.5MB in the end (delta: 125.3MB). Peak memory consumption was 126.9MB. Max. memory is 8.0GB. [2022-03-19 03:07:36,217 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 174.1MB. Free memory is still 132.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 254.62ms. Allocated memory was 174.1MB in the beginning and 270.5MB in the end (delta: 96.5MB). Free memory was 115.5MB in the beginning and 239.4MB in the end (delta: -123.9MB). Peak memory consumption was 7.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 62.96ms. Allocated memory is still 270.5MB. Free memory was 239.4MB in the beginning and 237.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 405.62ms. Allocated memory is still 270.5MB. Free memory was 237.3MB in the beginning and 217.3MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * TraceAbstraction took 4925.10ms. Allocated memory is still 270.5MB. Free memory was 216.8MB in the beginning and 91.5MB in the end (delta: 125.3MB). Peak memory consumption was 126.9MB. 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: 4.9s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 790 SdHoareTripleChecker+Valid, 1.7s 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, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=0, InterpolantAutomatonStates: 61, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 24 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-19 03:07:36,250 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...