/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.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 03:07:22,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 03:07:22,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 03:07:22,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 03:07:22,596 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 03:07:22,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 03:07:22,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 03:07:22,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 03:07:22,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 03:07:22,606 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 03:07:22,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 03:07:22,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 03:07:22,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 03:07:22,610 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 03:07:22,611 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 03:07:22,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 03:07:22,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 03:07:22,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 03:07:22,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 03:07:22,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 03:07:22,622 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 03:07:22,623 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 03:07:22,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 03:07:22,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 03:07:22,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 03:07:22,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 03:07:22,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 03:07:22,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 03:07:22,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 03:07:22,639 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 03:07:22,646 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 03:07:22,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 03:07:22,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 03:07:22,648 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 03:07:22,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 03:07:22,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 03:07:22,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 03:07:22,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 03:07:22,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 03:07:22,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 03:07:22,649 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 03:07:22,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 03:07:22,650 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 03:07:22,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 03:07:22,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 03:07:22,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 03:07:22,650 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 03:07:22,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 03:07:22,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 03:07:22,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 03:07:22,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 03:07:22,651 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 03:07:22,651 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 03:07:22,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 03:07:22,651 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 03:07:22,651 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 03:07:22,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 03:07:22,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 03:07:22,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 03:07:22,859 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 03:07:22,860 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 03:07:22,860 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter.c [2022-03-19 03:07:22,930 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed06ebb7f/f1a12a13d7804d7ab063f5f88022dcb9/FLAGb1ff82266 [2022-03-19 03:07:23,288 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 03:07:23,288 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter.c [2022-03-19 03:07:23,295 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed06ebb7f/f1a12a13d7804d7ab063f5f88022dcb9/FLAGb1ff82266 [2022-03-19 03:07:23,709 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed06ebb7f/f1a12a13d7804d7ab063f5f88022dcb9 [2022-03-19 03:07:23,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 03:07:23,712 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 03:07:23,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 03:07:23,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 03:07:23,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 03:07:23,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 03:07:23" (1/1) ... [2022-03-19 03:07:23,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7521c923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:23, skipping insertion in model container [2022-03-19 03:07:23,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 03:07:23" (1/1) ... [2022-03-19 03:07:23,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 03:07:23,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 03:07:23,868 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.c[586,599] [2022-03-19 03:07:23,880 WARN L1550 CHandler]: Possible shadowing of function min [2022-03-19 03:07:23,894 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 03:07:23,901 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 03:07:23,909 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.c[586,599] [2022-03-19 03:07:23,913 WARN L1550 CHandler]: Possible shadowing of function min [2022-03-19 03:07:23,928 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 03:07:23,941 INFO L208 MainTranslator]: Completed translation [2022-03-19 03:07:23,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:23 WrapperNode [2022-03-19 03:07:23,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 03:07:23,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 03:07:23,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 03:07:23,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 03:07:23,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:23" (1/1) ... [2022-03-19 03:07:23,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:23" (1/1) ... [2022-03-19 03:07:23,959 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:23" (1/1) ... [2022-03-19 03:07:23,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:23" (1/1) ... [2022-03-19 03:07:23,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:23" (1/1) ... [2022-03-19 03:07:23,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:23" (1/1) ... [2022-03-19 03:07:23,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:23" (1/1) ... [2022-03-19 03:07:23,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 03:07:23,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 03:07:23,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 03:07:23,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 03:07:23,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:23" (1/1) ... [2022-03-19 03:07:23,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 03:07:23,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:07:24,017 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 03:07:24,036 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 03:07:24,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 03:07:24,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 03:07:24,054 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2022-03-19 03:07:24,054 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 03:07:24,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 03:07:24,055 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-03-19 03:07:24,055 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2022-03-19 03:07:24,055 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2022-03-19 03:07:24,055 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2022-03-19 03:07:24,056 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2022-03-19 03:07:24,057 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2022-03-19 03:07:24,057 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 03:07:24,057 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-03-19 03:07:24,057 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-03-19 03:07:24,057 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-03-19 03:07:24,058 INFO L130 BoogieDeclarations]: Found specification of procedure free [2022-03-19 03:07:24,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 03:07:24,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-03-19 03:07:24,058 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2022-03-19 03:07:24,058 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 03:07:24,058 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 03:07:24,058 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 03:07:24,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 03:07:24,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 03:07:24,058 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-03-19 03:07:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-19 03:07:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 03:07:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-03-19 03:07:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure min [2022-03-19 03:07:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 03:07:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-03-19 03:07:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2022-03-19 03:07:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 03:07:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2022-03-19 03:07:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure size [2022-03-19 03:07:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure task [2022-03-19 03:07:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-19 03:07:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-03-19 03:07:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 03:07:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 03:07:24,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 03:07:24,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 03:07:24,178 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 03:07:24,179 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 03:07:24,360 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 03:07:24,365 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 03:07:24,365 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-19 03:07:24,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 03:07:24 BoogieIcfgContainer [2022-03-19 03:07:24,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 03:07:24,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 03:07:24,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 03:07:24,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 03:07:24,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 03:07:23" (1/3) ... [2022-03-19 03:07:24,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14457b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 03:07:24, skipping insertion in model container [2022-03-19 03:07:24,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:23" (2/3) ... [2022-03-19 03:07:24,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14457b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 03:07:24, skipping insertion in model container [2022-03-19 03:07:24,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 03:07:24" (3/3) ... [2022-03-19 03:07:24,374 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter.c [2022-03-19 03:07:24,378 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 03:07:24,378 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 03:07:24,407 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 03:07:24,411 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 03:07:24,411 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 03:07:24,424 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 61 states have internal predecessors, (76), 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 03:07:24,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 03:07:24,431 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:24,432 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 03:07:24,432 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:24,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:24,435 INFO L85 PathProgramCache]: Analyzing trace with hash -738616471, now seen corresponding path program 1 times [2022-03-19 03:07:24,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:24,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1110515654] [2022-03-19 03:07:24,447 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:24,448 INFO L85 PathProgramCache]: Analyzing trace with hash -738616471, now seen corresponding path program 2 times [2022-03-19 03:07:24,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:24,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773562431] [2022-03-19 03:07:24,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:24,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:24,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:24,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:07:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:24,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 03:07:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:24,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 03:07:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:24,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 03:07:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:24,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 03:07:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:24,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 03:07:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:24,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 03:07:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:24,788 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 03:07:24,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:07:24,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773562431] [2022-03-19 03:07:24,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773562431] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:24,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:24,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 03:07:24,792 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:07:24,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1110515654] [2022-03-19 03:07:24,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1110515654] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:24,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:24,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 03:07:24,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850434243] [2022-03-19 03:07:24,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:07:24,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 03:07:24,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:24,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 03:07:24,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-19 03:07:24,821 INFO L87 Difference]: Start difference. First operand has 98 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 61 states have internal predecessors, (76), 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 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 03:07:25,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:07:25,452 INFO L93 Difference]: Finished difference Result 174 states and 235 transitions. [2022-03-19 03:07:25,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 03:07:25,454 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 03:07:25,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:07:25,461 INFO L225 Difference]: With dead ends: 174 [2022-03-19 03:07:25,461 INFO L226 Difference]: Without dead ends: 98 [2022-03-19 03:07:25,463 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-03-19 03:07:25,466 INFO L912 BasicCegarLoop]: 79 mSDtfsCounter, 150 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:07:25,466 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 97 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 03:07:25,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-19 03:07:25,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2022-03-19 03:07:25,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 56 states have internal predecessors, (64), 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 03:07:25,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions. [2022-03-19 03:07:25,506 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 44 [2022-03-19 03:07:25,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:07:25,506 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 115 transitions. [2022-03-19 03:07:25,506 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 03:07:25,506 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions. [2022-03-19 03:07:25,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 03:07:25,508 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:25,509 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 03:07:25,509 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 03:07:25,509 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:25,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:25,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1232690542, now seen corresponding path program 1 times [2022-03-19 03:07:25,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:25,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [383917739] [2022-03-19 03:07:25,510 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:25,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1232690542, now seen corresponding path program 2 times [2022-03-19 03:07:25,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:25,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557300277] [2022-03-19 03:07:25,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:25,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:25,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:07:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:25,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 03:07:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:25,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 03:07:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:25,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 03:07:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:25,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 03:07:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:25,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 03:07:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:25,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 03:07:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:25,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-19 03:07:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:25,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 03:07:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:25,702 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 03:07:25,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:07:25,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557300277] [2022-03-19 03:07:25,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557300277] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:07:25,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435669931] [2022-03-19 03:07:25,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:07:25,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:07:25,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:07:25,705 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 03:07:25,710 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 03:07:25,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:07:25,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:07:25,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 03:07:25,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:07:26,028 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 03:07:26,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:07:26,278 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 03:07:26,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435669931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:07:26,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:07:26,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 15 [2022-03-19 03:07:26,280 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:07:26,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [383917739] [2022-03-19 03:07:26,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [383917739] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:26,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:26,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 03:07:26,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455865835] [2022-03-19 03:07:26,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:07:26,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 03:07:26,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:26,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 03:07:26,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-03-19 03:07:26,282 INFO L87 Difference]: Start difference. First operand 91 states and 115 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 03:07:26,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:07:26,814 INFO L93 Difference]: Finished difference Result 165 states and 211 transitions. [2022-03-19 03:07:26,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 03:07:26,815 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 03:07:26,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:07:26,816 INFO L225 Difference]: With dead ends: 165 [2022-03-19 03:07:26,816 INFO L226 Difference]: Without dead ends: 97 [2022-03-19 03:07:26,817 INFO L911 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 [2022-03-19 03:07:26,818 INFO L912 BasicCegarLoop]: 72 mSDtfsCounter, 183 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:07:26,818 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 84 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 03:07:26,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-19 03:07:26,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2022-03-19 03:07:26,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 58 states have internal predecessors, (65), 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 03:07:26,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2022-03-19 03:07:26,831 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 56 [2022-03-19 03:07:26,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:07:26,831 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2022-03-19 03:07:26,831 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 03:07:26,832 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2022-03-19 03:07:26,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-19 03:07:26,833 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:26,833 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 03:07:26,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 03:07:27,054 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:07:27,055 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:27,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:27,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1976466705, now seen corresponding path program 1 times [2022-03-19 03:07:27,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:27,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1286006982] [2022-03-19 03:07:27,056 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:27,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1976466705, now seen corresponding path program 2 times [2022-03-19 03:07:27,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:27,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989778352] [2022-03-19 03:07:27,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:27,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:07:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 03:07:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 03:07:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 03:07:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-19 03:07:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 03:07:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 03:07:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-03-19 03:07:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-03-19 03:07:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-19 03:07:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,227 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 03:07:27,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:07:27,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989778352] [2022-03-19 03:07:27,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989778352] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:27,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:27,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 03:07:27,229 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:07:27,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1286006982] [2022-03-19 03:07:27,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1286006982] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:27,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:27,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 03:07:27,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253941957] [2022-03-19 03:07:27,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:07:27,236 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 03:07:27,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:27,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 03:07:27,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-03-19 03:07:27,237 INFO L87 Difference]: Start difference. First operand 93 states and 118 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 03:07:27,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:07:27,772 INFO L93 Difference]: Finished difference Result 164 states and 210 transitions. [2022-03-19 03:07:27,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 03:07:27,773 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 03:07:27,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:07:27,778 INFO L225 Difference]: With dead ends: 164 [2022-03-19 03:07:27,778 INFO L226 Difference]: Without dead ends: 99 [2022-03-19 03:07:27,782 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 03:07:27,786 INFO L912 BasicCegarLoop]: 70 mSDtfsCounter, 178 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:07:27,788 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 84 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 03:07:27,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-19 03:07:27,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2022-03-19 03:07:27,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 60 states have internal predecessors, (66), 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 03:07:27,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2022-03-19 03:07:27,803 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 66 [2022-03-19 03:07:27,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:07:27,804 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2022-03-19 03:07:27,805 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 03:07:27,805 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2022-03-19 03:07:27,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 03:07:27,808 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:27,808 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 03:07:27,808 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 03:07:27,808 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:27,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:27,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1818938389, now seen corresponding path program 1 times [2022-03-19 03:07:27,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:27,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1496047124] [2022-03-19 03:07:27,809 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:27,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1818938389, now seen corresponding path program 2 times [2022-03-19 03:07:27,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:27,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222252301] [2022-03-19 03:07:27,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:27,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:07:27,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 03:07:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 03:07:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 03:07:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 03:07:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 03:07:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-19 03:07:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:28,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 03:07:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:28,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 03:07:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:28,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-19 03:07:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:28,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-19 03:07:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:28,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-03-19 03:07:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-19 03:07:28,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:07:28,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222252301] [2022-03-19 03:07:28,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222252301] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:07:28,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371406507] [2022-03-19 03:07:28,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:07:28,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:07:28,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:07:28,050 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:07:28,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 03:07:28,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:07:28,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:07:28,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 03:07:28,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:07:28,267 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 03:07:28,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 03:07:28,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371406507] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:28,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 03:07:28,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 20 [2022-03-19 03:07:28,268 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:07:28,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1496047124] [2022-03-19 03:07:28,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1496047124] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:28,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:28,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 03:07:28,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919714216] [2022-03-19 03:07:28,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:07:28,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 03:07:28,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:28,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 03:07:28,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-03-19 03:07:28,269 INFO L87 Difference]: Start difference. First operand 95 states and 121 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 5 states have call successors, (16), 3 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 03:07:28,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:07:28,348 INFO L93 Difference]: Finished difference Result 150 states and 192 transitions. [2022-03-19 03:07:28,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 03:07:28,349 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 5 states have call successors, (16), 3 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 03:07:28,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:07:28,350 INFO L225 Difference]: With dead ends: 150 [2022-03-19 03:07:28,350 INFO L226 Difference]: Without dead ends: 97 [2022-03-19 03:07:28,350 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2022-03-19 03:07:28,351 INFO L912 BasicCegarLoop]: 104 mSDtfsCounter, 35 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:07:28,351 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 748 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 03:07:28,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-19 03:07:28,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-03-19 03:07:28,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 62 states have internal predecessors, (67), 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 03:07:28,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2022-03-19 03:07:28,362 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 79 [2022-03-19 03:07:28,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:07:28,362 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2022-03-19 03:07:28,362 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 5 states have call successors, (16), 3 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 03:07:28,362 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2022-03-19 03:07:28,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-19 03:07:28,363 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:28,363 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 03:07:28,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 03:07:28,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-19 03:07:28,580 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:28,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:28,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1854783018, now seen corresponding path program 1 times [2022-03-19 03:07:28,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:28,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [977476067] [2022-03-19 03:07:28,581 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:28,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1854783018, now seen corresponding path program 2 times [2022-03-19 03:07:28,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:28,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336322890] [2022-03-19 03:07:28,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:28,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:28,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 03:07:28,617 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 03:07:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 03:07:28,684 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 03:07:28,684 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-19 03:07:28,684 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-19 03:07:28,687 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 03:07:28,688 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-19 03:07:28,690 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2] [2022-03-19 03:07:28,692 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 03:07:28,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 03:07:28 BoogieIcfgContainer [2022-03-19 03:07:28,705 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 03:07:28,705 INFO L158 Benchmark]: Toolchain (without parser) took 4992.87ms. Allocated memory was 190.8MB in the beginning and 229.6MB in the end (delta: 38.8MB). Free memory was 141.0MB in the beginning and 109.5MB in the end (delta: 31.5MB). Peak memory consumption was 71.4MB. Max. memory is 8.0GB. [2022-03-19 03:07:28,705 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 190.8MB. Free memory is still 157.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 03:07:28,705 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.87ms. Allocated memory is still 190.8MB. Free memory was 140.8MB in the beginning and 167.1MB in the end (delta: -26.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-19 03:07:28,705 INFO L158 Benchmark]: Boogie Preprocessor took 35.27ms. Allocated memory is still 190.8MB. Free memory was 166.8MB in the beginning and 164.2MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-19 03:07:28,706 INFO L158 Benchmark]: RCFGBuilder took 387.94ms. Allocated memory is still 190.8MB. Free memory was 164.2MB in the beginning and 144.8MB in the end (delta: 19.4MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2022-03-19 03:07:28,706 INFO L158 Benchmark]: TraceAbstraction took 4337.37ms. Allocated memory was 190.8MB in the beginning and 229.6MB in the end (delta: 38.8MB). Free memory was 144.5MB in the beginning and 109.5MB in the end (delta: 35.0MB). Peak memory consumption was 75.0MB. Max. memory is 8.0GB. [2022-03-19 03:07:28,707 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 190.8MB. Free memory is still 157.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 228.87ms. Allocated memory is still 190.8MB. Free memory was 140.8MB in the beginning and 167.1MB in the end (delta: -26.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.27ms. Allocated memory is still 190.8MB. Free memory was 166.8MB in the beginning and 164.2MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 387.94ms. Allocated memory is still 190.8MB. Free memory was 164.2MB in the beginning and 144.8MB in the end (delta: 19.4MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * TraceAbstraction took 4337.37ms. Allocated memory was 190.8MB in the beginning and 229.6MB in the end (delta: 38.8MB). Free memory was 144.5MB in the beginning and 109.5MB in the end (delta: 35.0MB). Peak memory consumption was 75.0MB. 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: [L110] 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; [L110] RET, EXPR nondet_tree() [L110] CALL task(nondet_tree()) [L86] CALL, EXPR min(t) [L37] COND FALSE !(!n) [L40] EXPR n->data [L40] int a = n->data; [L41] EXPR n->left [L41] CALL, EXPR min(n->left) [L37] COND TRUE !n [L38] return 2147483647; [L41] RET, EXPR min(n->left) [L41] int b = min(n->left); [L42] EXPR n->right [L42] CALL, EXPR min(n->right) [L37] COND TRUE !n [L38] return 2147483647; [L42] RET, EXPR min(n->right) [L42] int c = min(n->right); [L43] COND TRUE b <= a && b <= c [L43] return b; [L86] RET, EXPR min(t) [L86] int a = min(t); [L87] int b; [L89] CALL, EXPR size(t) [L81] COND FALSE !(!t) [L82] EXPR t->left [L82] CALL, EXPR size(t->left) [L81] COND TRUE !t [L81] return 0; [L82] RET, EXPR size(t->left) [L82] EXPR t->right [L82] CALL, EXPR size(t->right) [L81] COND TRUE !t [L81] return 0; [L82] RET, EXPR size(t->right) [L82] return size(t->left) + size(t->right) + 1; [L89] RET, EXPR size(t) [L89] int n = size(t); [L90] CALL assume_cycle_if_not(n != 0) [L9] COND FALSE !(!cond) [L90] RET assume_cycle_if_not(n != 0) [L91] EXPR, FCALL calloc(n, sizeof(int)) [L91] int *x = calloc(n, sizeof(int)); [L92] CALL tree_inorder(t, x, n) [L70] COND FALSE !(!t) [L73] EXPR t->left [L73] CALL, EXPR tree_inorder(t->left, a, i) [L70] COND TRUE !t [L71] return i; [L73] RET, EXPR tree_inorder(t->left, a, i) [L73] i = tree_inorder(t->left, a, i) [L74] EXPR i++ [L74] EXPR t->data [L74] a[i++] = t->data [L75] EXPR t->right [L75] CALL, EXPR tree_inorder(t->right, a, i) [L70] COND TRUE !t [L71] return i; [L75] RET, EXPR tree_inorder(t->right, a, i) [L75] i = tree_inorder(t->right, a, i) [L76] return i; [L92] RET tree_inorder(t, x, n) [L93] EXPR x[0] [L93] CALL __VERIFIER_assert(a == x[0]) [L16] COND TRUE !cond [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 101 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.3s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 588 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 546 mSDsluCounter, 1013 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 688 mSDsCounter, 499 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2373 IncrementalHoareTripleChecker+Invalid, 2872 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 499 mSolverCounterUnsat, 325 mSDtfsCounter, 2373 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 335 GetRequests, 251 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred in iteration=0, InterpolantAutomatonStates: 48, 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, 4 MinimizatonAttempts, 15 StatesRemovedByMinimization, 3 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 03:07:28,732 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...