/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_rec.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:19:32,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:19:32,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:19:32,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:19:32,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:19:32,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:19:32,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:19:32,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:19:32,770 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:19:32,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:19:32,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:19:32,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:19:32,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:19:32,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:19:32,775 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:19:32,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:19:32,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:19:32,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:19:32,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:19:32,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:19:32,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:19:32,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:19:32,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:19:32,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:19:32,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:19:32,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 13:19:32,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 13:19:32,794 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 13:19:32,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 13:19:32,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 13:19:32,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 13:19:32,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 13:19:32,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 13:19:32,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:19:32,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:19:32,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:19:32,800 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 13:19:32,810 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:19:32,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:19:32,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:19:32,812 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:19:32,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:19:32,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:19:32,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:19:32,812 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:19:32,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:19:32,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:19:32,813 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:19:32,813 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:19:32,813 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:19:32,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:19:32,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:19:32,814 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:19:32,814 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:19:32,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:19:32,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:19:32,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:19:32,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:19:32,815 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:19:32,815 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:19:33,105 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:19:33,122 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:19:33,125 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:19:33,127 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:19:33,127 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:19:33,128 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec.c [2020-07-07 13:19:33,189 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36e249448/7620473112024ba6945482f2be565855/FLAGccf1b3d7a [2020-07-07 13:19:33,652 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:19:33,653 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec.c [2020-07-07 13:19:33,660 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36e249448/7620473112024ba6945482f2be565855/FLAGccf1b3d7a [2020-07-07 13:19:34,053 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36e249448/7620473112024ba6945482f2be565855 [2020-07-07 13:19:34,062 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:19:34,064 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:19:34,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:19:34,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:19:34,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:19:34,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:19:34" (1/1) ... [2020-07-07 13:19:34,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72e63f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:34, skipping insertion in model container [2020-07-07 13:19:34,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:19:34" (1/1) ... [2020-07-07 13:19:34,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:19:34,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:19:34,289 WARN L1484 CHandler]: Possible shadowing of function min [2020-07-07 13:19:34,291 WARN L1484 CHandler]: Possible shadowing of function min [2020-07-07 13:19:34,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:19:34,342 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:19:34,470 WARN L1484 CHandler]: Possible shadowing of function min [2020-07-07 13:19:34,473 WARN L1484 CHandler]: Possible shadowing of function min [2020-07-07 13:19:34,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:19:34,537 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:19:34,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:34 WrapperNode [2020-07-07 13:19:34,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:19:34,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:19:34,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:19:34,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:19:34,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:34" (1/1) ... [2020-07-07 13:19:34,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:34" (1/1) ... [2020-07-07 13:19:34,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:34" (1/1) ... [2020-07-07 13:19:34,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:34" (1/1) ... [2020-07-07 13:19:34,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:34" (1/1) ... [2020-07-07 13:19:34,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:34" (1/1) ... [2020-07-07 13:19:34,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:34" (1/1) ... [2020-07-07 13:19:34,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:19:34,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:19:34,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:19:34,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:19:34,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:34" (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 13:19:34,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:19:34,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:19:34,741 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2020-07-07 13:19:34,741 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 13:19:34,741 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-07-07 13:19:34,741 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-07-07 13:19:34,741 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-07-07 13:19:34,742 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-07-07 13:19:34,743 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-07-07 13:19:34,743 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-07-07 13:19:34,743 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:19:34,743 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-07-07 13:19:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-07 13:19:34,744 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-07 13:19:34,744 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-07 13:19:34,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:19:34,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-07 13:19:34,746 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2020-07-07 13:19:34,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:19:34,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 13:19:34,749 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-07-07 13:19:34,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-07 13:19:34,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 13:19:34,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-07 13:19:34,749 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-07-07 13:19:34,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 13:19:34,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-07 13:19:34,750 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-07-07 13:19:34,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 13:19:34,750 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-07-07 13:19:34,751 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-07-07 13:19:34,751 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-07-07 13:19:34,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 13:19:34,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-07-07 13:19:34,751 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:19:34,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:19:34,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:19:35,446 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:19:35,446 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-07 13:19:35,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:19:35 BoogieIcfgContainer [2020-07-07 13:19:35,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:19:35,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:19:35,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:19:35,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:19:35,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:19:34" (1/3) ... [2020-07-07 13:19:35,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54aea8d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:19:35, skipping insertion in model container [2020-07-07 13:19:35,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:34" (2/3) ... [2020-07-07 13:19:35,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54aea8d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:19:35, skipping insertion in model container [2020-07-07 13:19:35,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:19:35" (3/3) ... [2020-07-07 13:19:35,463 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2020-07-07 13:19:35,473 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:19:35,482 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:19:35,497 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:19:35,520 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:19:35,521 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:19:35,521 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:19:35,521 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:19:35,521 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:19:35,522 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:19:35,522 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:19:35,522 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:19:35,543 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states. [2020-07-07 13:19:35,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-07 13:19:35,561 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:19:35,562 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 13:19:35,562 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:19:35,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:19:35,569 INFO L82 PathProgramCache]: Analyzing trace with hash -2147081424, now seen corresponding path program 1 times [2020-07-07 13:19:35,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:19:35,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290097490] [2020-07-07 13:19:35,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:19:35,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:35,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:36,062 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 13:19:36,062 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:19:36,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290097490] [2020-07-07 13:19:36,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:19:36,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 13:19:36,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585930059] [2020-07-07 13:19:36,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 13:19:36,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:19:36,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 13:19:36,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-07 13:19:36,093 INFO L87 Difference]: Start difference. First operand 190 states. Second operand 11 states. [2020-07-07 13:19:37,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:19:37,412 INFO L93 Difference]: Finished difference Result 333 states and 391 transitions. [2020-07-07 13:19:37,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 13:19:37,414 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-07-07 13:19:37,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:19:37,431 INFO L225 Difference]: With dead ends: 333 [2020-07-07 13:19:37,432 INFO L226 Difference]: Without dead ends: 193 [2020-07-07 13:19:37,438 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 13:19:37,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-07-07 13:19:37,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 180. [2020-07-07 13:19:37,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-07-07 13:19:37,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 204 transitions. [2020-07-07 13:19:37,526 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 204 transitions. Word has length 60 [2020-07-07 13:19:37,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:19:37,526 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 204 transitions. [2020-07-07 13:19:37,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 13:19:37,527 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 204 transitions. [2020-07-07 13:19:37,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-07 13:19:37,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:19:37,534 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 13:19:37,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:19:37,534 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:19:37,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:19:37,535 INFO L82 PathProgramCache]: Analyzing trace with hash 394479658, now seen corresponding path program 1 times [2020-07-07 13:19:37,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:19:37,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930887051] [2020-07-07 13:19:37,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:19:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:37,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:37,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:37,902 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 13:19:37,902 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:19:37,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930887051] [2020-07-07 13:19:37,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:19:37,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-07 13:19:37,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837320118] [2020-07-07 13:19:37,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 13:19:37,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:19:37,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 13:19:37,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-07-07 13:19:37,906 INFO L87 Difference]: Start difference. First operand 180 states and 204 transitions. Second operand 12 states. [2020-07-07 13:19:39,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:19:39,216 INFO L93 Difference]: Finished difference Result 321 states and 367 transitions. [2020-07-07 13:19:39,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 13:19:39,217 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 80 [2020-07-07 13:19:39,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:19:39,228 INFO L225 Difference]: With dead ends: 321 [2020-07-07 13:19:39,228 INFO L226 Difference]: Without dead ends: 192 [2020-07-07 13:19:39,235 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 13:19:39,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-07 13:19:39,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 182. [2020-07-07 13:19:39,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-07-07 13:19:39,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 207 transitions. [2020-07-07 13:19:39,285 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 207 transitions. Word has length 80 [2020-07-07 13:19:39,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:19:39,286 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 207 transitions. [2020-07-07 13:19:39,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 13:19:39,286 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 207 transitions. [2020-07-07 13:19:39,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-07 13:19:39,291 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:19:39,292 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 13:19:39,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:19:39,292 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:19:39,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:19:39,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1011523, now seen corresponding path program 1 times [2020-07-07 13:19:39,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:19:39,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683295517] [2020-07-07 13:19:39,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:19:39,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:19:39,303 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 13:19:39,309 INFO L168 Benchmark]: Toolchain (without parser) took 5244.62 ms. Allocated memory was 137.4 MB in the beginning and 249.6 MB in the end (delta: 112.2 MB). Free memory was 100.7 MB in the beginning and 105.2 MB in the end (delta: -4.4 MB). Peak memory consumption was 107.8 MB. Max. memory is 7.1 GB. [2020-07-07 13:19:39,310 INFO L168 Benchmark]: CDTParser took 0.91 ms. Allocated memory is still 137.4 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 13:19:39,312 INFO L168 Benchmark]: CACSL2BoogieTranslator took 472.50 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 100.5 MB in the beginning and 176.9 MB in the end (delta: -76.3 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-07-07 13:19:39,312 INFO L168 Benchmark]: Boogie Preprocessor took 119.18 ms. Allocated memory is still 200.8 MB. Free memory was 176.9 MB in the beginning and 174.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-07 13:19:39,313 INFO L168 Benchmark]: RCFGBuilder took 792.48 ms. Allocated memory is still 200.8 MB. Free memory was 174.2 MB in the beginning and 132.8 MB in the end (delta: 41.4 MB). Peak memory consumption was 41.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:19:39,314 INFO L168 Benchmark]: TraceAbstraction took 3851.68 ms. Allocated memory was 200.8 MB in the beginning and 249.6 MB in the end (delta: 48.8 MB). Free memory was 132.1 MB in the beginning and 105.2 MB in the end (delta: 27.0 MB). Peak memory consumption was 75.7 MB. Max. memory is 7.1 GB. [2020-07-07 13:19:39,319 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.91 ms. Allocated memory is still 137.4 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 472.50 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 100.5 MB in the beginning and 176.9 MB in the end (delta: -76.3 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.18 ms. Allocated memory is still 200.8 MB. Free memory was 176.9 MB in the beginning and 174.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 792.48 ms. Allocated memory is still 200.8 MB. Free memory was 174.2 MB in the beginning and 132.8 MB in the end (delta: 41.4 MB). Peak memory consumption was 41.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3851.68 ms. Allocated memory was 200.8 MB in the beginning and 249.6 MB in the end (delta: 48.8 MB). Free memory was 132.1 MB in the beginning and 105.2 MB in the end (delta: 27.0 MB). Peak memory consumption was 75.7 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...