/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --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/elimination_max_rec.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:59:14,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:59:14,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:59:14,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 22:59:14,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:59:14,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:59:14,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:59:14,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:59:14,716 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:59:14,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:59:14,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:59:14,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:59:14,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:59:14,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:59:14,725 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:59:14,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:59:14,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:59:14,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:59:14,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:59:14,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:59:14,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:59:14,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:59:14,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:59:14,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:59:14,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 22:59:14,751 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 22:59:14,751 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 22:59:14,754 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 22:59:14,755 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 22:59:14,757 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 22:59:14,757 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 22:59:14,758 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 22:59:14,759 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 22:59:14,760 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 22:59:14,770 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 22:59:14,771 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 22:59:14,771 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 22:59:14,775 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 22:59:14,775 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:59:14,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:59:14,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:59:14,781 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 22:59:14,807 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:59:14,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:59:14,809 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:59:14,809 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:59:14,810 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:59:14,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:59:14,810 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:59:14,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:59:14,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:59:14,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:59:14,811 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:59:14,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:59:14,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:59:14,811 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:59:14,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:59:14,812 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:59:14,812 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:59:14,812 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:59:14,812 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:59:14,813 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:59:14,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:59:14,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:59:14,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:59:14,813 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:59:14,813 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:59:14,814 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:59:14,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:59:14,814 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:59:14,814 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:59:14,814 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=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-08-21 22:59:15,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:59:15,122 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:59:15,126 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:59:15,127 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:59:15,128 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:59:15,128 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/elimination_max_rec.c [2020-08-21 22:59:15,188 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56be98725/82bde2bee1ae4ed2bd5f90a51aea51a3/FLAG22fea92d1 [2020-08-21 22:59:15,647 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:59:15,647 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/elimination_max_rec.c [2020-08-21 22:59:15,654 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56be98725/82bde2bee1ae4ed2bd5f90a51aea51a3/FLAG22fea92d1 [2020-08-21 22:59:16,039 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56be98725/82bde2bee1ae4ed2bd5f90a51aea51a3 [2020-08-21 22:59:16,048 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:59:16,050 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:59:16,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:59:16,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:59:16,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:59:16,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:59:16" (1/1) ... [2020-08-21 22:59:16,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28b7d04d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:16, skipping insertion in model container [2020-08-21 22:59:16,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:59:16" (1/1) ... [2020-08-21 22:59:16,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:59:16,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:59:16,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:59:16,295 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:59:16,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:59:16,338 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:59:16,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:16 WrapperNode [2020-08-21 22:59:16,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:59:16,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:59:16,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:59:16,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:59:16,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:16" (1/1) ... [2020-08-21 22:59:16,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:16" (1/1) ... [2020-08-21 22:59:16,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:16" (1/1) ... [2020-08-21 22:59:16,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:16" (1/1) ... [2020-08-21 22:59:16,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:16" (1/1) ... [2020-08-21 22:59:16,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:16" (1/1) ... [2020-08-21 22:59:16,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:16" (1/1) ... [2020-08-21 22:59:16,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:59:16,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:59:16,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:59:16,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:59:16,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:16" (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 22:59:16,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:59:16,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:59:16,558 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 22:59:16,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 22:59:16,558 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-08-21 22:59:16,558 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:59:16,558 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-08-21 22:59:16,558 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 22:59:16,558 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 22:59:16,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:59:16,560 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 22:59:16,560 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 22:59:16,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 22:59:16,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 22:59:16,560 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-21 22:59:16,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 22:59:16,561 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:59:16,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 22:59:16,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-08-21 22:59:16,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 22:59:16,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:59:16,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:59:16,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 22:59:16,922 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:59:16,922 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 22:59:16,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:59:16 BoogieIcfgContainer [2020-08-21 22:59:16,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:59:16,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:59:16,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:59:16,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:59:16,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:59:16" (1/3) ... [2020-08-21 22:59:16,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c22b6bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:59:16, skipping insertion in model container [2020-08-21 22:59:16,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:16" (2/3) ... [2020-08-21 22:59:16,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c22b6bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:59:16, skipping insertion in model container [2020-08-21 22:59:16,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:59:16" (3/3) ... [2020-08-21 22:59:16,935 INFO L109 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2020-08-21 22:59:16,947 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:59:16,954 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:59:16,968 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:59:16,994 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:59:16,995 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:59:16,995 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:59:16,995 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:59:16,995 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:59:16,995 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:59:16,995 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:59:16,996 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:59:17,016 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-08-21 22:59:17,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 22:59:17,022 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:17,023 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] [2020-08-21 22:59:17,024 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:17,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:17,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1882906983, now seen corresponding path program 1 times [2020-08-21 22:59:17,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:17,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229620181] [2020-08-21 22:59:17,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:17,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:17,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:59:17,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:17,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:59:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:17,263 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 22:59:17,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229620181] [2020-08-21 22:59:17,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:17,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 22:59:17,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596303473] [2020-08-21 22:59:17,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 22:59:17,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:17,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 22:59:17,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 22:59:17,287 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 4 states. [2020-08-21 22:59:17,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:17,477 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2020-08-21 22:59:17,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:59:17,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-08-21 22:59:17,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:17,490 INFO L225 Difference]: With dead ends: 77 [2020-08-21 22:59:17,490 INFO L226 Difference]: Without dead ends: 37 [2020-08-21 22:59:17,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:59:17,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-21 22:59:17,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-08-21 22:59:17,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-21 22:59:17,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-08-21 22:59:17,541 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 24 [2020-08-21 22:59:17,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:17,542 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-08-21 22:59:17,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 22:59:17,542 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-08-21 22:59:17,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 22:59:17,544 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:17,544 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] [2020-08-21 22:59:17,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:59:17,545 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:17,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:17,545 INFO L82 PathProgramCache]: Analyzing trace with hash 861838629, now seen corresponding path program 1 times [2020-08-21 22:59:17,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:17,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066501602] [2020-08-21 22:59:17,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:17,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:17,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:59:17,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:17,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:59:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:17,748 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 22:59:17,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066501602] [2020-08-21 22:59:17,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:17,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 22:59:17,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387071772] [2020-08-21 22:59:17,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:59:17,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:17,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:59:17,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:59:17,758 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 8 states. [2020-08-21 22:59:18,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:18,266 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2020-08-21 22:59:18,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:59:18,266 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-08-21 22:59:18,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:18,270 INFO L225 Difference]: With dead ends: 64 [2020-08-21 22:59:18,271 INFO L226 Difference]: Without dead ends: 62 [2020-08-21 22:59:18,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:59:18,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-21 22:59:18,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-08-21 22:59:18,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-21 22:59:18,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-08-21 22:59:18,291 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 24 [2020-08-21 22:59:18,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:18,292 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-08-21 22:59:18,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:59:18,292 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-08-21 22:59:18,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 22:59:18,296 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:18,296 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 22:59:18,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:59:18,297 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:18,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:18,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1086413545, now seen corresponding path program 1 times [2020-08-21 22:59:18,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:18,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105661500] [2020-08-21 22:59:18,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:18,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:18,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:59:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:18,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:59:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:18,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 22:59:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:18,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105661500] [2020-08-21 22:59:18,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:59:18,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 22:59:18,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28946340] [2020-08-21 22:59:18,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:59:18,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:18,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:59:18,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:59:18,566 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 10 states. [2020-08-21 22:59:19,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:19,177 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-08-21 22:59:19,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 22:59:19,178 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-08-21 22:59:19,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:19,180 INFO L225 Difference]: With dead ends: 68 [2020-08-21 22:59:19,180 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 22:59:19,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-08-21 22:59:19,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 22:59:19,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 41. [2020-08-21 22:59:19,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-21 22:59:19,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-08-21 22:59:19,192 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2020-08-21 22:59:19,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:19,192 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-08-21 22:59:19,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:59:19,193 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-08-21 22:59:19,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 22:59:19,194 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:19,194 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 22:59:19,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:59:19,195 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:19,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:19,195 INFO L82 PathProgramCache]: Analyzing trace with hash 601964552, now seen corresponding path program 1 times [2020-08-21 22:59:19,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:19,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633781306] [2020-08-21 22:59:19,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:19,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:19,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:59:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:19,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:59:19,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:19,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 22:59:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:19,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 22:59:19,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:19,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 22:59:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:19,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 22:59:19,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633781306] [2020-08-21 22:59:19,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:59:19,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 22:59:19,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117403590] [2020-08-21 22:59:19,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 22:59:19,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:19,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 22:59:19,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:59:19,381 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 12 states. [2020-08-21 22:59:19,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:19,826 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-08-21 22:59:19,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 22:59:19,828 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-08-21 22:59:19,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:19,829 INFO L225 Difference]: With dead ends: 43 [2020-08-21 22:59:19,829 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 22:59:19,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-08-21 22:59:19,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 22:59:19,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 22:59:19,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 22:59:19,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 22:59:19,832 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2020-08-21 22:59:19,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:19,832 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 22:59:19,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 22:59:19,832 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 22:59:19,832 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 22:59:19,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:59:19,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 22:59:20,167 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-08-21 22:59:20,480 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-21 22:59:20,481 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(#NULL.base)| |#NULL.base|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-21 22:59:20,481 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:59:20,481 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:59:20,481 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 22:59:20,482 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 22:59:20,483 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 22:59:20,483 INFO L271 CegarLoopResult]: At program point assume_abort_if_notENTRY(lines 5 7) the Hoare annotation is: true [2020-08-21 22:59:20,483 INFO L268 CegarLoopResult]: For program point L6(line 6) no Hoare annotation was computed. [2020-08-21 22:59:20,484 INFO L268 CegarLoopResult]: For program point L6-2(lines 5 7) no Hoare annotation was computed. [2020-08-21 22:59:20,484 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 5 7) no Hoare annotation was computed. [2020-08-21 22:59:20,484 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 39 48) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-08-21 22:59:20,484 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 39 48) no Hoare annotation was computed. [2020-08-21 22:59:20,484 INFO L264 CegarLoopResult]: At program point L44(line 44) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= (select |#memory_int| main_~a~0.base) .cse0) (= (select |#memory_int| |main_#t~malloc10.base|) .cse0))) [2020-08-21 22:59:20,485 INFO L264 CegarLoopResult]: At program point L43(line 43) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2020-08-21 22:59:20,486 INFO L268 CegarLoopResult]: For program point L44-1(line 44) no Hoare annotation was computed. [2020-08-21 22:59:20,487 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-08-21 22:59:20,487 INFO L268 CegarLoopResult]: For program point L43-1(line 43) no Hoare annotation was computed. [2020-08-21 22:59:20,487 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-08-21 22:59:20,488 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 39 48) no Hoare annotation was computed. [2020-08-21 22:59:20,488 INFO L268 CegarLoopResult]: For program point L34-1(line 34) no Hoare annotation was computed. [2020-08-21 22:59:20,488 INFO L271 CegarLoopResult]: At program point checkENTRY(lines 14 37) the Hoare annotation is: true [2020-08-21 22:59:20,489 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (let ((.cse2 ((as const (Array Int Int)) 0)) (.cse1 (= |check_#in~x| 0))) (or (let ((.cse0 (not (<= (+ |check_#in~y| 1) |check_#in~n|)))) (and (or .cse0 (not .cse1)) (or .cse0 (not (<= 1 |check_#in~x|))))) (not (= (select |#memory_int| |check_#in~a.base|) .cse2)) (and (= (select |#memory_int| check_~a.base) .cse2) (let ((.cse3 (<= (+ check_~y 1) check_~n))) (or (and .cse3 (<= 1 check_~x)) (and .cse1 .cse3 (= check_~x 0))))))) [2020-08-21 22:59:20,489 INFO L268 CegarLoopResult]: For program point L31-1(line 31) no Hoare annotation was computed. [2020-08-21 22:59:20,490 INFO L268 CegarLoopResult]: For program point L26(line 26) no Hoare annotation was computed. [2020-08-21 22:59:20,490 INFO L268 CegarLoopResult]: For program point L23(lines 23 24) no Hoare annotation was computed. [2020-08-21 22:59:20,490 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 24) the Hoare annotation is: (let ((.cse2 ((as const (Array Int Int)) 0)) (.cse1 (= |check_#in~x| 0))) (or (let ((.cse0 (not (<= (+ |check_#in~y| 1) |check_#in~n|)))) (and (or .cse0 (not .cse1)) (or .cse0 (not (<= 1 |check_#in~x|))))) (not (= (select |#memory_int| |check_#in~a.base|) .cse2)) (and (= (select |#memory_int| check_~a.base) .cse2) (let ((.cse3 (<= (+ check_~y 1) check_~n))) (or (and .cse3 (<= 1 check_~x)) (and .cse1 .cse3 (= check_~x 0))))))) [2020-08-21 22:59:20,490 INFO L268 CegarLoopResult]: For program point checkEXIT(lines 14 37) no Hoare annotation was computed. [2020-08-21 22:59:20,490 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (let ((.cse3 ((as const (Array Int Int)) 0)) (.cse1 (= |check_#in~x| 0)) (.cse2 (<= 1 |check_#in~x|))) (or (let ((.cse0 (not (<= (+ |check_#in~y| 1) |check_#in~n|)))) (and (or .cse0 (not .cse1)) (or .cse0 (not .cse2)))) (not (= (select |#memory_int| |check_#in~a.base|) .cse3)) (and (= (select |#memory_int| check_~a.base) .cse3) (let ((.cse4 (<= (+ check_~y 1) check_~n))) (or (and .cse1 .cse4 (= check_~x 0)) (and .cse4 .cse2 (<= 1 check_~x))))))) [2020-08-21 22:59:20,494 INFO L268 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-08-21 22:59:20,494 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-08-21 22:59:20,494 INFO L268 CegarLoopResult]: For program point checkFINAL(lines 14 37) no Hoare annotation was computed. [2020-08-21 22:59:20,495 INFO L264 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: (let ((.cse1 (= |check_#in~x| 0)) (.cse2 ((as const (Array Int Int)) 0))) (or (let ((.cse0 (not (<= (+ |check_#in~y| 1) |check_#in~n|)))) (and (or .cse0 (not .cse1)) (or .cse0 (not (<= 1 |check_#in~x|))))) (and (= check_~ax~0 0) (= check_~ai~0 0) (= (select |#memory_int| check_~a.base) .cse2) (let ((.cse3 (<= (+ check_~y 1) check_~n))) (or (and .cse3 (<= 1 check_~x)) (and .cse1 .cse3 (= check_~x 0))))) (not (= (select |#memory_int| |check_#in~a.base|) .cse2)))) [2020-08-21 22:59:20,495 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 8 10) the Hoare annotation is: true [2020-08-21 22:59:20,495 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 8 10) no Hoare annotation was computed. [2020-08-21 22:59:20,495 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-08-21 22:59:20,495 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-08-21 22:59:20,495 INFO L268 CegarLoopResult]: For program point L9-3(lines 8 10) no Hoare annotation was computed. [2020-08-21 22:59:20,496 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-08-21 22:59:20,496 INFO L264 CegarLoopResult]: At program point #Ultimate.meminitENTRY(line -1) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2020-08-21 22:59:20,496 INFO L268 CegarLoopResult]: For program point #Ultimate.meminitEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:59:20,496 INFO L268 CegarLoopResult]: For program point #Ultimate.meminitFINAL(line -1) no Hoare annotation was computed. [2020-08-21 22:59:20,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:59:20 BoogieIcfgContainer [2020-08-21 22:59:20,513 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:59:20,515 INFO L168 Benchmark]: Toolchain (without parser) took 4465.08 ms. Allocated memory was 140.0 MB in the beginning and 245.9 MB in the end (delta: 105.9 MB). Free memory was 102.8 MB in the beginning and 164.8 MB in the end (delta: -62.1 MB). Peak memory consumption was 111.3 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:20,516 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-21 22:59:20,518 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.83 ms. Allocated memory is still 140.0 MB. Free memory was 102.3 MB in the beginning and 91.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:20,521 INFO L168 Benchmark]: Boogie Preprocessor took 145.32 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 91.9 MB in the beginning and 180.2 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:20,524 INFO L168 Benchmark]: RCFGBuilder took 442.14 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 161.2 MB in the end (delta: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:20,525 INFO L168 Benchmark]: TraceAbstraction took 3584.66 ms. Allocated memory was 202.9 MB in the beginning and 245.9 MB in the end (delta: 43.0 MB). Free memory was 161.2 MB in the beginning and 164.8 MB in the end (delta: -3.6 MB). Peak memory consumption was 106.8 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:20,534 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 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 287.83 ms. Allocated memory is still 140.0 MB. Free memory was 102.3 MB in the beginning and 91.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 145.32 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 91.9 MB in the beginning and 180.2 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 442.14 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 161.2 MB in the end (delta: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3584.66 ms. Allocated memory was 202.9 MB in the beginning and 245.9 MB in the end (delta: 43.0 MB). Free memory was 161.2 MB in the beginning and 164.8 MB in the end (delta: -3.6 MB). Peak memory consumption was 106.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.8s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 130 SDtfs, 288 SDslu, 185 SDs, 0 SdLazy, 789 SolverSat, 242 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 32 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 36 PreInvPairs, 44 NumberOfFragments, 297 HoareAnnotationTreeSize, 36 FomulaSimplifications, 702 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 15 FomulaSimplificationsInter, 306 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 125 NumberOfCodeBlocks, 125 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 121 ConstructedInterpolants, 0 QuantifiedInterpolants, 11740 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 8/13 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 correct! Received shutdown request...