/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.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 14:06:02,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 14:06:02,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 14:06:02,696 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 14:06:02,696 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 14:06:02,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 14:06:02,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 14:06:02,701 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 14:06:02,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 14:06:02,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 14:06:02,705 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 14:06:02,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 14:06:02,706 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 14:06:02,707 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 14:06:02,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 14:06:02,710 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 14:06:02,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 14:06:02,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 14:06:02,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 14:06:02,715 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 14:06:02,717 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 14:06:02,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 14:06:02,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 14:06:02,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 14:06:02,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 14:06:02,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 14:06:02,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 14:06:02,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 14:06:02,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 14:06:02,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 14:06:02,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 14:06:02,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 14:06:02,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 14:06:02,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 14:06:02,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 14:06:02,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 14:06:02,733 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 14:06:02,743 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 14:06:02,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 14:06:02,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 14:06:02,745 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 14:06:02,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 14:06:02,745 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 14:06:02,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 14:06:02,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 14:06:02,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 14:06:02,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 14:06:02,746 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 14:06:02,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 14:06:02,747 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 14:06:02,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 14:06:02,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 14:06:02,747 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 14:06:02,747 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 14:06:02,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 14:06:02,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 14:06:02,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 14:06:02,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 14:06:02,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 14:06:02,749 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 14:06:03,068 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 14:06:03,085 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 14:06:03,088 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 14:06:03,091 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 14:06:03,091 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 14:06:03,092 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter.c [2020-07-07 14:06:03,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38396ece6/02da1a8aac814016b71d5f272d9143b5/FLAGe82e48851 [2020-07-07 14:06:03,677 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 14:06:03,678 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter.c [2020-07-07 14:06:03,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38396ece6/02da1a8aac814016b71d5f272d9143b5/FLAGe82e48851 [2020-07-07 14:06:03,978 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38396ece6/02da1a8aac814016b71d5f272d9143b5 [2020-07-07 14:06:03,988 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 14:06:03,990 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 14:06:03,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 14:06:03,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 14:06:03,995 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 14:06:03,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:06:03" (1/1) ... [2020-07-07 14:06:03,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6057d15b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:03, skipping insertion in model container [2020-07-07 14:06:03,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:06:03" (1/1) ... [2020-07-07 14:06:04,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 14:06:04,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 14:06:04,229 WARN L1484 CHandler]: Possible shadowing of function min [2020-07-07 14:06:04,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:06:04,266 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 14:06:04,393 WARN L1484 CHandler]: Possible shadowing of function min [2020-07-07 14:06:04,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:06:04,436 INFO L208 MainTranslator]: Completed translation [2020-07-07 14:06:04,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:04 WrapperNode [2020-07-07 14:06:04,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 14:06:04,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 14:06:04,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 14:06:04,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 14:06:04,448 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 14:06:04,448 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 14:06:04,479 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 14:06:04,479 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 14:06:04,516 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 14:06:04,522 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 14:06:04,527 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 14:06:04,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 14:06:04,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 14:06:04,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 14:06:04,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 14:06:04,536 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 14:06:04,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 14:06:04,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 14:06:04,592 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2020-07-07 14:06:04,592 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 14:06:04,592 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-07-07 14:06:04,593 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-07-07 14:06:04,593 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-07-07 14:06:04,593 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-07-07 14:06:04,593 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-07-07 14:06:04,593 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-07-07 14:06:04,593 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 14:06:04,593 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-07-07 14:06:04,594 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-07 14:06:04,594 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-07 14:06:04,594 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-07 14:06:04,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 14:06:04,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-07 14:06:04,595 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2020-07-07 14:06:04,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 14:06:04,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 14:06:04,595 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-07-07 14:06:04,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-07 14:06:04,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 14:06:04,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-07 14:06:04,596 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-07-07 14:06:04,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 14:06:04,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-07 14:06:04,596 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-07-07 14:06:04,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 14:06:04,597 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-07-07 14:06:04,597 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-07-07 14:06:04,597 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-07-07 14:06:04,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 14:06:04,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-07-07 14:06:04,598 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 14:06:04,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 14:06:04,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 14:06:05,280 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 14:06:05,281 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-07 14:06:05,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:06:05 BoogieIcfgContainer [2020-07-07 14:06:05,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 14:06:05,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 14:06:05,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 14:06:05,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 14:06:05,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 02:06:03" (1/3) ... [2020-07-07 14:06:05,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242989be 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 14:06:05,303 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 14:06:05,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242989be 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 14:06:05,304 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 14:06:05,307 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_iter.c [2020-07-07 14:06:05,319 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 14:06:05,330 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 14:06:05,347 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 14:06:05,376 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 14:06:05,377 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 14:06:05,377 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 14:06:05,377 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 14:06:05,378 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 14:06:05,378 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 14:06:05,378 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 14:06:05,378 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 14:06:05,407 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states. [2020-07-07 14:06:05,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-07 14:06:05,430 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:06:05,431 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 14:06:05,431 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:06:05,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:06:05,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1657225032, now seen corresponding path program 1 times [2020-07-07 14:06:05,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:06:05,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888205303] [2020-07-07 14:06:05,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:06:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:05,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:05,911 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 14:06:05,912 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:06:05,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888205303] [2020-07-07 14:06:05,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:06:05,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 14:06:05,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969472844] [2020-07-07 14:06:05,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 14:06:05,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:06:05,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 14:06:05,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-07 14:06:05,942 INFO L87 Difference]: Start difference. First operand 206 states. Second operand 11 states. [2020-07-07 14:06:07,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:06:07,226 INFO L93 Difference]: Finished difference Result 366 states and 427 transitions. [2020-07-07 14:06:07,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 14:06:07,228 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-07-07 14:06:07,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:06:07,245 INFO L225 Difference]: With dead ends: 366 [2020-07-07 14:06:07,245 INFO L226 Difference]: Without dead ends: 210 [2020-07-07 14:06:07,251 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 14:06:07,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-07-07 14:06:07,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 196. [2020-07-07 14:06:07,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-07-07 14:06:07,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 220 transitions. [2020-07-07 14:06:07,355 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 220 transitions. Word has length 60 [2020-07-07 14:06:07,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:06:07,356 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 220 transitions. [2020-07-07 14:06:07,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 14:06:07,356 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 220 transitions. [2020-07-07 14:06:07,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-07 14:06:07,375 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:06:07,375 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 14:06:07,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 14:06:07,376 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:06:07,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:06:07,376 INFO L82 PathProgramCache]: Analyzing trace with hash -290171790, now seen corresponding path program 1 times [2020-07-07 14:06:07,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:06:07,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788684375] [2020-07-07 14:06:07,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:06:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:07,719 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 14:06:07,720 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:06:07,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788684375] [2020-07-07 14:06:07,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:06:07,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-07 14:06:07,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643280781] [2020-07-07 14:06:07,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 14:06:07,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:06:07,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 14:06:07,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-07-07 14:06:07,725 INFO L87 Difference]: Start difference. First operand 196 states and 220 transitions. Second operand 12 states. [2020-07-07 14:06:08,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:06:08,998 INFO L93 Difference]: Finished difference Result 354 states and 400 transitions. [2020-07-07 14:06:08,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 14:06:08,998 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 80 [2020-07-07 14:06:08,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:06:09,002 INFO L225 Difference]: With dead ends: 354 [2020-07-07 14:06:09,002 INFO L226 Difference]: Without dead ends: 209 [2020-07-07 14:06:09,006 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 14:06:09,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-07-07 14:06:09,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 198. [2020-07-07 14:06:09,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-07 14:06:09,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 223 transitions. [2020-07-07 14:06:09,038 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 223 transitions. Word has length 80 [2020-07-07 14:06:09,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:06:09,038 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 223 transitions. [2020-07-07 14:06:09,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 14:06:09,038 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 223 transitions. [2020-07-07 14:06:09,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-07 14:06:09,040 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:06:09,041 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 14:06:09,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 14:06:09,041 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:06:09,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:06:09,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1366806748, now seen corresponding path program 1 times [2020-07-07 14:06:09,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:06:09,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598542719] [2020-07-07 14:06:09,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:06:09,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 14:06:09,055 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 14:06:09,060 INFO L168 Benchmark]: Toolchain (without parser) took 5069.22 ms. Allocated memory was 138.4 MB in the beginning and 289.4 MB in the end (delta: 151.0 MB). Free memory was 103.4 MB in the beginning and 239.6 MB in the end (delta: -136.2 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-07-07 14:06:09,061 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.4 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 14:06:09,062 INFO L168 Benchmark]: CACSL2BoogieTranslator took 445.41 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 103.2 MB in the beginning and 178.1 MB in the end (delta: -74.9 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. [2020-07-07 14:06:09,063 INFO L168 Benchmark]: Boogie Preprocessor took 96.86 ms. Allocated memory is still 201.9 MB. Free memory was 178.1 MB in the beginning and 175.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-07 14:06:09,064 INFO L168 Benchmark]: RCFGBuilder took 759.96 ms. Allocated memory is still 201.9 MB. Free memory was 175.4 MB in the beginning and 130.7 MB in the end (delta: 44.7 MB). Peak memory consumption was 44.7 MB. Max. memory is 7.1 GB. [2020-07-07 14:06:09,065 INFO L168 Benchmark]: TraceAbstraction took 3760.96 ms. Allocated memory was 201.9 MB in the beginning and 289.4 MB in the end (delta: 87.6 MB). Free memory was 130.0 MB in the beginning and 239.6 MB in the end (delta: -109.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-07 14:06:09,069 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.4 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 445.41 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 103.2 MB in the beginning and 178.1 MB in the end (delta: -74.9 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 96.86 ms. Allocated memory is still 201.9 MB. Free memory was 178.1 MB in the beginning and 175.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 759.96 ms. Allocated memory is still 201.9 MB. Free memory was 175.4 MB in the beginning and 130.7 MB in the end (delta: 44.7 MB). Peak memory consumption was 44.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3760.96 ms. Allocated memory was 201.9 MB in the beginning and 289.4 MB in the end (delta: 87.6 MB). Free memory was 130.0 MB in the beginning and 239.6 MB in the end (delta: -109.6 MB). There was no memory consumed. 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...