/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 19:06:03,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 19:06:03,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 19:06:03,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 19:06:03,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 19:06:03,575 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 19:06:03,578 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 19:06:03,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 19:06:03,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 19:06:03,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 19:06:03,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 19:06:03,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 19:06:03,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 19:06:03,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 19:06:03,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 19:06:03,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 19:06:03,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 19:06:03,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 19:06:03,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 19:06:03,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 19:06:03,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 19:06:03,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 19:06:03,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 19:06:03,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 19:06:03,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 19:06:03,628 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 19:06:03,628 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 19:06:03,629 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 19:06:03,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 19:06:03,634 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 19:06:03,635 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 19:06:03,635 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 19:06:03,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 19:06:03,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 19:06:03,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 19:06:03,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 19:06:03,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 19:06:03,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 19:06:03,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 19:06:03,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 19:06:03,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 19:06:03,648 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 19:06:03,687 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 19:06:03,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 19:06:03,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 19:06:03,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 19:06:03,690 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 19:06:03,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 19:06:03,691 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 19:06:03,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 19:06:03,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 19:06:03,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 19:06:03,692 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 19:06:03,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 19:06:03,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 19:06:03,693 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 19:06:03,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 19:06:03,694 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 19:06:03,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 19:06:03,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 19:06:03,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 19:06:03,695 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 19:06:03,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 19:06:03,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:06:03,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 19:06:03,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 19:06:03,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 19:06:03,696 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 19:06:03,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 19:06:03,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 19:06:03,697 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 19:06:03,697 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; [2020-08-21 19:06:04,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 19:06:04,039 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 19:06:04,043 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 19:06:04,044 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 19:06:04,045 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 19:06:04,046 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2020-08-21 19:06:04,124 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/614a83aeb/3fd274ac16f441a89958cd9a1a6ba883/FLAG201f69626 [2020-08-21 19:06:04,632 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 19:06:04,633 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2020-08-21 19:06:04,640 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/614a83aeb/3fd274ac16f441a89958cd9a1a6ba883/FLAG201f69626 [2020-08-21 19:06:05,018 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/614a83aeb/3fd274ac16f441a89958cd9a1a6ba883 [2020-08-21 19:06:05,031 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 19:06:05,033 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 19:06:05,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 19:06:05,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 19:06:05,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 19:06:05,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:06:05" (1/1) ... [2020-08-21 19:06:05,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6870637f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:06:05, skipping insertion in model container [2020-08-21 19:06:05,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:06:05" (1/1) ... [2020-08-21 19:06:05,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 19:06:05,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 19:06:05,291 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-21 19:06:05,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:06:05,322 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 19:06:05,426 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-21 19:06:05,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:06:05,458 INFO L208 MainTranslator]: Completed translation [2020-08-21 19:06:05,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:06:05 WrapperNode [2020-08-21 19:06:05,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 19:06:05,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 19:06:05,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 19:06:05,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 19:06:05,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:06:05" (1/1) ... [2020-08-21 19:06:05,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:06:05" (1/1) ... [2020-08-21 19:06:05,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:06:05" (1/1) ... [2020-08-21 19:06:05,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:06:05" (1/1) ... [2020-08-21 19:06:05,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:06:05" (1/1) ... [2020-08-21 19:06:05,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:06:05" (1/1) ... [2020-08-21 19:06:05,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:06:05" (1/1) ... [2020-08-21 19:06:05,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 19:06:05,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 19:06:05,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 19:06:05,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 19:06:05,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:06:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 19:06:05,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 19:06:05,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 19:06:05,592 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 19:06:05,592 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 19:06:05,593 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-08-21 19:06:05,593 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-08-21 19:06:05,593 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-08-21 19:06:05,593 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-08-21 19:06:05,593 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-08-21 19:06:05,594 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-08-21 19:06:05,594 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 19:06:05,594 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-08-21 19:06:05,594 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 19:06:05,594 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 19:06:05,594 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 19:06:05,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 19:06:05,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 19:06:05,595 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 19:06:05,595 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 19:06:05,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 19:06:05,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 19:06:05,596 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-08-21 19:06:05,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 19:06:05,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 19:06:05,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 19:06:05,596 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-08-21 19:06:05,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 19:06:05,597 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-08-21 19:06:05,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 19:06:05,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 19:06:05,597 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-08-21 19:06:05,597 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-08-21 19:06:05,597 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-08-21 19:06:05,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 19:06:05,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-08-21 19:06:05,598 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 19:06:05,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 19:06:05,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 19:06:06,176 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 19:06:06,177 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-21 19:06:06,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:06:06 BoogieIcfgContainer [2020-08-21 19:06:06,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 19:06:06,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 19:06:06,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 19:06:06,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 19:06:06,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 07:06:05" (1/3) ... [2020-08-21 19:06:06,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@398f2c24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:06:06, skipping insertion in model container [2020-08-21 19:06:06,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:06:05" (2/3) ... [2020-08-21 19:06:06,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@398f2c24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:06:06, skipping insertion in model container [2020-08-21 19:06:06,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:06:06" (3/3) ... [2020-08-21 19:06:06,191 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2020-08-21 19:06:06,203 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 19:06:06,211 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 19:06:06,222 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 19:06:06,251 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 19:06:06,251 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 19:06:06,251 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 19:06:06,251 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 19:06:06,252 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 19:06:06,252 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 19:06:06,252 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 19:06:06,252 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 19:06:06,274 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states. [2020-08-21 19:06:06,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-21 19:06:06,283 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:06:06,284 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] [2020-08-21 19:06:06,285 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:06:06,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:06:06,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1213743031, now seen corresponding path program 1 times [2020-08-21 19:06:06,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:06:06,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315417368] [2020-08-21 19:06:06,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:06:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:06,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:06:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:06,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:06:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:06,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 19:06:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:06,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 19:06:06,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:06,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 19:06:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:06,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 19:06:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:06,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 19:06:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:06:06,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315417368] [2020-08-21 19:06:06,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:06:06,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 19:06:06,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018290640] [2020-08-21 19:06:06,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 19:06:06,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:06:06,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 19:06:06,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 19:06:06,681 INFO L87 Difference]: Start difference. First operand 96 states. Second operand 6 states. [2020-08-21 19:06:07,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:06:07,156 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2020-08-21 19:06:07,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:06:07,158 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-08-21 19:06:07,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:06:07,173 INFO L225 Difference]: With dead ends: 168 [2020-08-21 19:06:07,173 INFO L226 Difference]: Without dead ends: 95 [2020-08-21 19:06:07,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-21 19:06:07,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-21 19:06:07,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2020-08-21 19:06:07,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 19:06:07,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2020-08-21 19:06:07,244 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 44 [2020-08-21 19:06:07,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:06:07,245 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2020-08-21 19:06:07,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 19:06:07,245 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2020-08-21 19:06:07,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-21 19:06:07,248 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:06:07,249 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] [2020-08-21 19:06:07,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 19:06:07,249 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:06:07,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:06:07,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1392280523, now seen corresponding path program 1 times [2020-08-21 19:06:07,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:06:07,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274303085] [2020-08-21 19:06:07,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:06:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:07,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:06:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:07,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:06:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:07,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 19:06:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:07,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 19:06:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:07,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 19:06:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:07,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 19:06:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:07,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 19:06:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:06:07,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274303085] [2020-08-21 19:06:07,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:06:07,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 19:06:07,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889332959] [2020-08-21 19:06:07,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 19:06:07,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:06:07,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 19:06:07,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-08-21 19:06:07,503 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 11 states. [2020-08-21 19:06:08,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:06:08,184 INFO L93 Difference]: Finished difference Result 154 states and 197 transitions. [2020-08-21 19:06:08,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 19:06:08,184 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-08-21 19:06:08,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:06:08,188 INFO L225 Difference]: With dead ends: 154 [2020-08-21 19:06:08,188 INFO L226 Difference]: Without dead ends: 97 [2020-08-21 19:06:08,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-08-21 19:06:08,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-08-21 19:06:08,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2020-08-21 19:06:08,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-21 19:06:08,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2020-08-21 19:06:08,209 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 44 [2020-08-21 19:06:08,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:06:08,210 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2020-08-21 19:06:08,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 19:06:08,210 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2020-08-21 19:06:08,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 19:06:08,213 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:06:08,213 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:06:08,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 19:06:08,214 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:06:08,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:06:08,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1672920772, now seen corresponding path program 1 times [2020-08-21 19:06:08,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:06:08,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66610746] [2020-08-21 19:06:08,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:06:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:08,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:06:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:08,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:06:08,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:08,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 19:06:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:08,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 19:06:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:08,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:06:08,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:08,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 19:06:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:08,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 19:06:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:08,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 19:06:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:08,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 19:06:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 19:06:08,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66610746] [2020-08-21 19:06:08,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:06:08,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 19:06:08,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522507922] [2020-08-21 19:06:08,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 19:06:08,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:06:08,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 19:06:08,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-21 19:06:08,518 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 12 states. [2020-08-21 19:06:09,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:06:09,381 INFO L93 Difference]: Finished difference Result 164 states and 209 transitions. [2020-08-21 19:06:09,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 19:06:09,382 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-08-21 19:06:09,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:06:09,384 INFO L225 Difference]: With dead ends: 164 [2020-08-21 19:06:09,384 INFO L226 Difference]: Without dead ends: 96 [2020-08-21 19:06:09,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-08-21 19:06:09,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-21 19:06:09,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2020-08-21 19:06:09,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-08-21 19:06:09,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2020-08-21 19:06:09,410 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 56 [2020-08-21 19:06:09,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:06:09,411 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2020-08-21 19:06:09,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 19:06:09,411 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2020-08-21 19:06:09,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 19:06:09,415 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:06:09,415 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:06:09,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 19:06:09,416 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:06:09,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:06:09,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1614566559, now seen corresponding path program 1 times [2020-08-21 19:06:09,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:06:09,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115294766] [2020-08-21 19:06:09,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:06:09,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:09,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:06:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:09,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:06:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:09,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:06:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:09,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:06:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:09,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 19:06:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:09,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 19:06:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:09,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:06:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:09,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 19:06:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:09,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 19:06:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:09,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 19:06:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:09,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-21 19:06:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-21 19:06:09,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115294766] [2020-08-21 19:06:09,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:06:09,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 19:06:09,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272312674] [2020-08-21 19:06:09,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 19:06:09,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:06:09,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 19:06:09,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-08-21 19:06:09,635 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand 13 states. [2020-08-21 19:06:10,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:06:10,321 INFO L93 Difference]: Finished difference Result 163 states and 208 transitions. [2020-08-21 19:06:10,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 19:06:10,322 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-08-21 19:06:10,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:06:10,324 INFO L225 Difference]: With dead ends: 163 [2020-08-21 19:06:10,324 INFO L226 Difference]: Without dead ends: 98 [2020-08-21 19:06:10,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-08-21 19:06:10,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-21 19:06:10,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2020-08-21 19:06:10,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-21 19:06:10,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-08-21 19:06:10,349 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 66 [2020-08-21 19:06:10,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:06:10,350 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-08-21 19:06:10,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 19:06:10,350 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-08-21 19:06:10,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 19:06:10,352 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:06:10,352 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:06:10,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 19:06:10,353 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:06:10,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:06:10,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1598247989, now seen corresponding path program 1 times [2020-08-21 19:06:10,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:06:10,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044793232] [2020-08-21 19:06:10,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:06:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:10,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:06:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:10,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:06:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:10,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:06:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:10,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:06:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:10,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 19:06:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:10,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:06:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:10,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 19:06:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:10,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 19:06:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:10,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:06:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:10,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 19:06:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:10,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 19:06:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:10,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 19:06:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:10,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 19:06:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:06:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-08-21 19:06:10,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044793232] [2020-08-21 19:06:10,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:06:10,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 19:06:10,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994270247] [2020-08-21 19:06:10,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 19:06:10,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:06:10,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 19:06:10,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-08-21 19:06:10,605 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 13 states. [2020-08-21 19:06:11,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:06:11,213 INFO L93 Difference]: Finished difference Result 151 states and 192 transitions. [2020-08-21 19:06:11,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 19:06:11,214 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2020-08-21 19:06:11,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:06:11,219 INFO L225 Difference]: With dead ends: 151 [2020-08-21 19:06:11,219 INFO L226 Difference]: Without dead ends: 98 [2020-08-21 19:06:11,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2020-08-21 19:06:11,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-21 19:06:11,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-08-21 19:06:11,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-21 19:06:11,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2020-08-21 19:06:11,239 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 79 [2020-08-21 19:06:11,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:06:11,239 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2020-08-21 19:06:11,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 19:06:11,240 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2020-08-21 19:06:11,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 19:06:11,241 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:06:11,242 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:06:11,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 19:06:11,242 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:06:11,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:06:11,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1471493578, now seen corresponding path program 1 times [2020-08-21 19:06:11,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:06:11,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843087032] [2020-08-21 19:06:11,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:06:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 19:06:11,282 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 19:06:11,282 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 19:06:11,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 19:06:11,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:06:11 BoogieIcfgContainer [2020-08-21 19:06:11,308 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 19:06:11,310 INFO L168 Benchmark]: Toolchain (without parser) took 6277.01 ms. Allocated memory was 141.6 MB in the beginning and 274.7 MB in the end (delta: 133.2 MB). Free memory was 104.2 MB in the beginning and 112.5 MB in the end (delta: -8.4 MB). Peak memory consumption was 124.8 MB. Max. memory is 7.1 GB. [2020-08-21 19:06:11,311 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 19:06:11,312 INFO L168 Benchmark]: CACSL2BoogieTranslator took 422.19 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 104.0 MB in the beginning and 180.0 MB in the end (delta: -76.0 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-08-21 19:06:11,313 INFO L168 Benchmark]: Boogie Preprocessor took 62.00 ms. Allocated memory is still 203.9 MB. Free memory was 180.0 MB in the beginning and 177.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2020-08-21 19:06:11,313 INFO L168 Benchmark]: RCFGBuilder took 660.27 ms. Allocated memory is still 203.9 MB. Free memory was 177.5 MB in the beginning and 142.6 MB in the end (delta: 34.8 MB). Peak memory consumption was 34.8 MB. Max. memory is 7.1 GB. [2020-08-21 19:06:11,314 INFO L168 Benchmark]: TraceAbstraction took 5124.19 ms. Allocated memory was 203.9 MB in the beginning and 274.7 MB in the end (delta: 70.8 MB). Free memory was 142.0 MB in the beginning and 112.5 MB in the end (delta: 29.4 MB). Peak memory consumption was 100.2 MB. Max. memory is 7.1 GB. [2020-08-21 19:06:11,318 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 422.19 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 104.0 MB in the beginning and 180.0 MB in the end (delta: -76.0 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 62.00 ms. Allocated memory is still 203.9 MB. Free memory was 180.0 MB in the beginning and 177.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 660.27 ms. Allocated memory is still 203.9 MB. Free memory was 177.5 MB in the beginning and 142.6 MB in the end (delta: 34.8 MB). Peak memory consumption was 34.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5124.19 ms. Allocated memory was 203.9 MB in the beginning and 274.7 MB in the end (delta: 70.8 MB). Free memory was 142.0 MB in the beginning and 112.5 MB in the end (delta: 29.4 MB). Peak memory consumption was 100.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L103] CALL, EXPR nondet_tree() [L23] COND FALSE !(__VERIFIER_nondet_bool()) [L26] struct node *n = (struct node *)malloc(sizeof(struct node)); [L27] n->data = __VERIFIER_nondet_int() [L28] CALL, EXPR nondet_tree() [L23] COND TRUE __VERIFIER_nondet_bool() [L24] return 0; [L28] RET, EXPR nondet_tree() [L28] n->left = nondet_tree() [L29] CALL, EXPR nondet_tree() [L23] COND TRUE __VERIFIER_nondet_bool() [L24] return 0; [L29] RET, EXPR nondet_tree() [L29] n->right = nondet_tree() [L30] return n; [L103] RET, EXPR nondet_tree() [L103] CALL task(nondet_tree()) [L81] CALL, EXPR min(t) [L35] COND FALSE !(!n) [L38] EXPR n->left [L38] CALL, EXPR min(n->left) [L35] COND TRUE !n [L36] return 2147483647; [L38] RET, EXPR min(n->left) [L38] int a = min(n->left); [L39] EXPR n->right [L39] CALL, EXPR min(n->right) [L35] COND TRUE !n [L36] return 2147483647; [L39] RET, EXPR min(n->right) [L39] int b = min(n->right); [L40] COND TRUE a <= b [L40] return a; [L81] RET, EXPR min(t) [L81] int a = min(t); [L82] int b; [L84] CALL, EXPR size(t) [L76] COND FALSE !(!t) [L77] EXPR t->left [L77] CALL, EXPR size(t->left) [L76] COND TRUE !t [L76] return 0; [L77] RET, EXPR size(t->left) [L77] EXPR t->right [L77] CALL, EXPR size(t->right) [L76] COND TRUE !t [L76] return 0; [L77] RET, EXPR size(t->right) [L77] return size(t->left) + size(t->right) + 1; [L84] RET, EXPR size(t) [L84] int n = size(t); [L85] CALL assume_abort_if_not(n != 0) [L10] COND FALSE !(!cond) [L85] RET assume_abort_if_not(n != 0) [L86] EXPR, FCALL calloc(n, sizeof(int)) [L86] int *x = calloc(n, sizeof(int)); [L87] CALL tree_inorder(t, x, n) [L65] COND FALSE !(!t) [L68] EXPR t->left [L68] CALL, EXPR tree_inorder(t->left, a, i) [L65] COND TRUE !t [L66] return i; [L68] RET, EXPR tree_inorder(t->left, a, i) [L68] i = tree_inorder(t->left, a, i) [L69] EXPR i++ [L69] EXPR t->data [L69] a[i++] = t->data [L70] EXPR t->right [L70] CALL, EXPR tree_inorder(t->right, a, i) [L65] COND TRUE !t [L66] return i; [L70] RET, EXPR tree_inorder(t->right, a, i) [L70] i = tree_inorder(t->right, a, i) [L71] return i; [L87] RET tree_inorder(t, x, n) [L88] EXPR x[0] [L88] CALL __VERIFIER_assert(a == x[0]) [L14] COND TRUE !cond [L14] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 96 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.0s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 418 SDtfs, 667 SDslu, 1336 SDs, 0 SdLazy, 1975 SolverSat, 666 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 24 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 380 NumberOfCodeBlocks, 380 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 284 ConstructedInterpolants, 0 QuantifiedInterpolants, 45045 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 64/66 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...