/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 14:06:02,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 14:06:02,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 14:06:02,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 14:06:02,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 14:06:02,880 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 14:06:02,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 14:06:02,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 14:06:02,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 14:06:02,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 14:06:02,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 14:06:02,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 14:06:02,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 14:06:02,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 14:06:02,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 14:06:02,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 14:06:02,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 14:06:02,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 14:06:02,895 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 14:06:02,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 14:06:02,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 14:06:02,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 14:06:02,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 14:06:02,902 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 14:06:02,905 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 14:06:02,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 14:06:02,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 14:06:02,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 14:06:02,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 14:06:02,911 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 14:06:02,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 14:06:02,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 14:06:02,912 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 14:06:02,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 14:06:02,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 14:06:02,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 14:06:02,915 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 14:06:02,925 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 14:06:02,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 14:06:02,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 14:06:02,927 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 14:06:02,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 14:06:02,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 14:06:02,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 14:06:02,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 14:06:02,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 14:06:02,928 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 14:06:02,928 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 14:06:02,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 14:06:02,929 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 14:06:02,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 14:06:02,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 14:06:02,930 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 14:06:02,930 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 14:06:02,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 14:06:02,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 14:06:02,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 14:06:02,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 14:06:02,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 14:06:02,931 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 14:06:03,250 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 14:06:03,263 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 14:06:03,266 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 14:06:03,268 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 14:06:03,269 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 14:06:03,269 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2020-07-07 14:06:03,350 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98c9d2d33/cf6af1b405b3439d9163422d336c36fa/FLAG99597f3df [2020-07-07 14:06:03,953 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 14:06:03,953 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2020-07-07 14:06:03,963 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98c9d2d33/cf6af1b405b3439d9163422d336c36fa/FLAG99597f3df [2020-07-07 14:06:04,322 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98c9d2d33/cf6af1b405b3439d9163422d336c36fa [2020-07-07 14:06:04,331 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 14:06:04,333 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 14:06:04,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 14:06:04,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 14:06:04,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 14:06:04,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:06:04" (1/1) ... [2020-07-07 14:06:04,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a1caafd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:04, skipping insertion in model container [2020-07-07 14:06:04,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:06:04" (1/1) ... [2020-07-07 14:06:04,352 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 14:06:04,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 14:06:04,594 WARN L1484 CHandler]: Possible shadowing of function min [2020-07-07 14:06:04,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:06:04,635 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 14:06:04,756 WARN L1484 CHandler]: Possible shadowing of function min [2020-07-07 14:06:04,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:06:04,790 INFO L208 MainTranslator]: Completed translation [2020-07-07 14:06:04,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:04 WrapperNode [2020-07-07 14:06:04,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 14:06:04,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 14:06:04,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 14:06:04,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 14:06:04,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:04" (1/1) ... [2020-07-07 14:06:04,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:04" (1/1) ... [2020-07-07 14:06:04,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:04" (1/1) ... [2020-07-07 14:06:04,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:04" (1/1) ... [2020-07-07 14:06:04,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:04" (1/1) ... [2020-07-07 14:06:04,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:04" (1/1) ... [2020-07-07 14:06:04,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:04" (1/1) ... [2020-07-07 14:06:04,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 14:06:04,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 14:06:04,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 14:06:04,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 14:06:04,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 14:06:04,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 14:06:04,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 14:06:04,909 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 14:06:04,909 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 14:06:04,909 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-07-07 14:06:04,910 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-07-07 14:06:04,910 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-07-07 14:06:04,910 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-07-07 14:06:04,910 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-07-07 14:06:04,910 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-07-07 14:06:04,910 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 14:06:04,910 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-07-07 14:06:04,911 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-07 14:06:04,911 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-07 14:06:04,911 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-07 14:06:04,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 14:06:04,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-07 14:06:04,911 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 14:06:04,912 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 14:06:04,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 14:06:04,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 14:06:04,912 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-07-07 14:06:04,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-07 14:06:04,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 14:06:04,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-07 14:06:04,913 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-07-07 14:06:04,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-07 14:06:04,913 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-07-07 14:06:04,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 14:06:04,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 14:06:04,914 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-07-07 14:06:04,914 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-07-07 14:06:04,914 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-07-07 14:06:04,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 14:06:04,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-07-07 14:06:04,915 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 14:06:04,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 14:06:04,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 14:06:05,603 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 14:06:05,604 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-07 14:06:05,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:06:05 BoogieIcfgContainer [2020-07-07 14:06:05,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 14:06:05,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 14:06:05,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 14:06:05,615 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 14:06:05,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 02:06:04" (1/3) ... [2020-07-07 14:06:05,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63275a0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:06:05, skipping insertion in model container [2020-07-07 14:06:05,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:04" (2/3) ... [2020-07-07 14:06:05,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63275a0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:06:05, skipping insertion in model container [2020-07-07 14:06:05,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:06:05" (3/3) ... [2020-07-07 14:06:05,619 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2020-07-07 14:06:05,630 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 14:06:05,639 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 14:06:05,654 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 14:06:05,673 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 14:06:05,674 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 14:06:05,674 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 14:06:05,674 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 14:06:05,674 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 14:06:05,674 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 14:06:05,675 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 14:06:05,675 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 14:06:05,694 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states. [2020-07-07 14:06:05,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-07 14:06:05,710 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:06:05,711 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:06:05,712 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:06:05,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:06:05,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1732590877, now seen corresponding path program 1 times [2020-07-07 14:06:05,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:06:05,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308141006] [2020-07-07 14:06:05,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:06:05,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:06,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:06,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:06,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:06:06,210 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:06:06,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308141006] [2020-07-07 14:06:06,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:06:06,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 14:06:06,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732848275] [2020-07-07 14:06:06,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 14:06:06,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:06:06,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 14:06:06,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-07 14:06:06,237 INFO L87 Difference]: Start difference. First operand 199 states. Second operand 11 states. [2020-07-07 14:06:07,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:06:07,597 INFO L93 Difference]: Finished difference Result 357 states and 415 transitions. [2020-07-07 14:06:07,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 14:06:07,599 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-07-07 14:06:07,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:06:07,628 INFO L225 Difference]: With dead ends: 357 [2020-07-07 14:06:07,629 INFO L226 Difference]: Without dead ends: 205 [2020-07-07 14:06:07,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-07-07 14:06:07,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-07-07 14:06:07,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 191. [2020-07-07 14:06:07,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-07-07 14:06:07,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 214 transitions. [2020-07-07 14:06:07,794 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 214 transitions. Word has length 60 [2020-07-07 14:06:07,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:06:07,795 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 214 transitions. [2020-07-07 14:06:07,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 14:06:07,796 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 214 transitions. [2020-07-07 14:06:07,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-07 14:06:07,812 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:06:07,812 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:06:07,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 14:06:07,813 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:06:07,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:06:07,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1923885975, now seen corresponding path program 1 times [2020-07-07 14:06:07,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:06:07,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191976288] [2020-07-07 14:06:07,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:06:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:08,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 14:06:08,218 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:06:08,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191976288] [2020-07-07 14:06:08,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:06:08,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-07 14:06:08,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066066924] [2020-07-07 14:06:08,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 14:06:08,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:06:08,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 14:06:08,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-07-07 14:06:08,222 INFO L87 Difference]: Start difference. First operand 191 states and 214 transitions. Second operand 12 states. [2020-07-07 14:06:09,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:06:09,519 INFO L93 Difference]: Finished difference Result 349 states and 394 transitions. [2020-07-07 14:06:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 14:06:09,520 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 80 [2020-07-07 14:06:09,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:06:09,526 INFO L225 Difference]: With dead ends: 349 [2020-07-07 14:06:09,526 INFO L226 Difference]: Without dead ends: 204 [2020-07-07 14:06:09,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-07-07 14:06:09,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-07-07 14:06:09,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 193. [2020-07-07 14:06:09,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-07-07 14:06:09,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 217 transitions. [2020-07-07 14:06:09,564 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 217 transitions. Word has length 80 [2020-07-07 14:06:09,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:06:09,564 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 217 transitions. [2020-07-07 14:06:09,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 14:06:09,564 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 217 transitions. [2020-07-07 14:06:09,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-07 14:06:09,566 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:06:09,567 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:06:09,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 14:06:09,567 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:06:09,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:06:09,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1271695359, now seen corresponding path program 1 times [2020-07-07 14:06:09,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:06:09,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695977034] [2020-07-07 14:06:09,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:06:09,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 14:06:09,580 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:277) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-07 14:06:09,585 INFO L168 Benchmark]: Toolchain (without parser) took 5251.61 ms. Allocated memory was 135.8 MB in the beginning and 256.4 MB in the end (delta: 120.6 MB). Free memory was 100.0 MB in the beginning and 112.3 MB in the end (delta: -12.3 MB). Peak memory consumption was 108.3 MB. Max. memory is 7.1 GB. [2020-07-07 14:06:09,587 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 135.8 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 14:06:09,588 INFO L168 Benchmark]: CACSL2BoogieTranslator took 455.93 ms. Allocated memory was 135.8 MB in the beginning and 199.2 MB in the end (delta: 63.4 MB). Free memory was 99.8 MB in the beginning and 175.1 MB in the end (delta: -75.4 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-07-07 14:06:09,589 INFO L168 Benchmark]: Boogie Preprocessor took 61.09 ms. Allocated memory is still 199.2 MB. Free memory was 175.1 MB in the beginning and 173.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-07-07 14:06:09,590 INFO L168 Benchmark]: RCFGBuilder took 758.32 ms. Allocated memory is still 199.2 MB. Free memory was 173.0 MB in the beginning and 128.8 MB in the end (delta: 44.2 MB). Peak memory consumption was 44.2 MB. Max. memory is 7.1 GB. [2020-07-07 14:06:09,591 INFO L168 Benchmark]: TraceAbstraction took 3970.49 ms. Allocated memory was 199.2 MB in the beginning and 256.4 MB in the end (delta: 57.1 MB). Free memory was 128.8 MB in the beginning and 112.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 73.7 MB. Max. memory is 7.1 GB. [2020-07-07 14:06:09,595 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 135.8 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 455.93 ms. Allocated memory was 135.8 MB in the beginning and 199.2 MB in the end (delta: 63.4 MB). Free memory was 99.8 MB in the beginning and 175.1 MB in the end (delta: -75.4 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.09 ms. Allocated memory is still 199.2 MB. Free memory was 175.1 MB in the beginning and 173.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 758.32 ms. Allocated memory is still 199.2 MB. Free memory was 173.0 MB in the beginning and 128.8 MB in the end (delta: 44.2 MB). Peak memory consumption was 44.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3970.49 ms. Allocated memory was 199.2 MB in the beginning and 256.4 MB in the end (delta: 57.1 MB). Free memory was 128.8 MB in the beginning and 112.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 73.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...