/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=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs4f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 01:32:01,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 01:32:01,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 01:32:01,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 01:32:01,041 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 01:32:01,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 01:32:01,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 01:32:01,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 01:32:01,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 01:32:01,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 01:32:01,049 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 01:32:01,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 01:32:01,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:32:01,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:32:01,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:32:01,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:32:01,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:32:01,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:32:01,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:32:01,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:32:01,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:32:01,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:32:01,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:32:01,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:32:01,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 01:32:01,067 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 01:32:01,067 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 01:32:01,068 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 01:32:01,068 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 01:32:01,069 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 01:32:01,069 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 01:32:01,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 01:32:01,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 01:32:01,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 01:32:01,072 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 01:32:01,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 01:32:01,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 01:32:01,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 01:32:01,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:32:01,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:32:01,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:32:01,076 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 [2020-08-22 01:32:01,099 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:32:01,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:32:01,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:32:01,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:32:01,102 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:32:01,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:32:01,102 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 01:32:01,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:32:01,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 01:32:01,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:32:01,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:32:01,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:32:01,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:32:01,103 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 01:32:01,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:32:01,104 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:32:01,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:32:01,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:32:01,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:32:01,105 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:32:01,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:32:01,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:32:01,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:32:01,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:32:01,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:32:01,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:32:01,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:32:01,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:32:01,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:32:01,107 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=0.8;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=0.8;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=0.8;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=0.8;log-additional-information=true; [2020-08-22 01:32:01,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:32:01,459 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:32:01,464 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:32:01,466 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:32:01,468 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:32:01,469 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs4f.c [2020-08-22 01:32:01,553 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7445a91e/57d660998e044291bdcecf05a7a089e3/FLAG9852b7c6b [2020-08-22 01:32:02,069 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:32:02,070 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs4f.c [2020-08-22 01:32:02,078 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7445a91e/57d660998e044291bdcecf05a7a089e3/FLAG9852b7c6b [2020-08-22 01:32:02,400 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7445a91e/57d660998e044291bdcecf05a7a089e3 [2020-08-22 01:32:02,410 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:32:02,412 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:32:02,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:32:02,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:32:02,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:32:02,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:32:02" (1/1) ... [2020-08-22 01:32:02,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3330734f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:02, skipping insertion in model container [2020-08-22 01:32:02,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:32:02" (1/1) ... [2020-08-22 01:32:02,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:32:02,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:32:02,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:32:02,659 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:32:02,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:32:02,696 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:32:02,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:02 WrapperNode [2020-08-22 01:32:02,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:32:02,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:32:02,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:32:02,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:32:02,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:02" (1/1) ... [2020-08-22 01:32:02,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:02" (1/1) ... [2020-08-22 01:32:02,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:02" (1/1) ... [2020-08-22 01:32:02,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:02" (1/1) ... [2020-08-22 01:32:02,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:02" (1/1) ... [2020-08-22 01:32:02,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:02" (1/1) ... [2020-08-22 01:32:02,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:02" (1/1) ... [2020-08-22 01:32:02,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:32:02,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:32:02,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:32:02,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:32:02,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:02" (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 [2020-08-22 01:32:02,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:32:02,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:32:02,870 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 01:32:02,870 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 01:32:02,870 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:32:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:32:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 01:32:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 01:32:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 01:32:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 01:32:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 01:32:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:32:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 01:32:02,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 01:32:02,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 01:32:02,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 01:32:02,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 01:32:02,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:32:02,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:32:03,207 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:32:03,208 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 01:32:03,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:32:03 BoogieIcfgContainer [2020-08-22 01:32:03,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:32:03,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:32:03,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:32:03,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:32:03,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:32:02" (1/3) ... [2020-08-22 01:32:03,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562ee1f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:32:03, skipping insertion in model container [2020-08-22 01:32:03,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:02" (2/3) ... [2020-08-22 01:32:03,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562ee1f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:32:03, skipping insertion in model container [2020-08-22 01:32:03,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:32:03" (3/3) ... [2020-08-22 01:32:03,220 INFO L109 eAbstractionObserver]: Analyzing ICFG brs4f.c [2020-08-22 01:32:03,231 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:32:03,238 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 01:32:03,253 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 01:32:03,277 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:32:03,277 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:32:03,277 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:32:03,278 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:32:03,278 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:32:03,278 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:32:03,278 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:32:03,278 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:32:03,296 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-22 01:32:03,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 01:32:03,301 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:03,302 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] [2020-08-22 01:32:03,302 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:03,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:03,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-08-22 01:32:03,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:03,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538065175] [2020-08-22 01:32:03,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:03,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:03,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:32:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:03,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538065175] [2020-08-22 01:32:03,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:32:03,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:32:03,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463955075] [2020-08-22 01:32:03,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:32:03,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:03,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:32:03,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:32:03,553 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-08-22 01:32:03,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:03,671 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-08-22 01:32:03,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:32:03,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 01:32:03,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:03,683 INFO L225 Difference]: With dead ends: 56 [2020-08-22 01:32:03,683 INFO L226 Difference]: Without dead ends: 26 [2020-08-22 01:32:03,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:32:03,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-22 01:32:03,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-22 01:32:03,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-22 01:32:03,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-08-22 01:32:03,727 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-08-22 01:32:03,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:03,727 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-08-22 01:32:03,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:32:03,728 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-08-22 01:32:03,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 01:32:03,729 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:03,729 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] [2020-08-22 01:32:03,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:32:03,729 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:03,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:03,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-08-22 01:32:03,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:03,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92354626] [2020-08-22 01:32:03,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:03,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:03,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:03,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:32:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:03,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92354626] [2020-08-22 01:32:03,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:32:03,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 01:32:03,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051140308] [2020-08-22 01:32:03,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:32:03,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:03,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:32:03,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:32:03,857 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-08-22 01:32:04,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:04,012 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-08-22 01:32:04,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:32:04,012 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-22 01:32:04,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:04,014 INFO L225 Difference]: With dead ends: 45 [2020-08-22 01:32:04,014 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 01:32:04,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:32:04,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 01:32:04,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-22 01:32:04,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 01:32:04,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-08-22 01:32:04,024 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-08-22 01:32:04,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:04,024 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-08-22 01:32:04,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:32:04,024 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-08-22 01:32:04,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 01:32:04,026 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:04,026 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] [2020-08-22 01:32:04,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:32:04,026 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:04,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:04,027 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-08-22 01:32:04,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:04,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534653567] [2020-08-22 01:32:04,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:04,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 01:32:04,068 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 01:32:04,068 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 01:32:04,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 01:32:04,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 01:32:04 BoogieIcfgContainer [2020-08-22 01:32:04,091 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 01:32:04,094 INFO L168 Benchmark]: Toolchain (without parser) took 1681.73 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 101.6 MB in the beginning and 106.6 MB in the end (delta: -5.1 MB). Peak memory consumption was 56.8 MB. Max. memory is 7.1 GB. [2020-08-22 01:32:04,095 INFO L168 Benchmark]: CDTParser took 0.79 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-22 01:32:04,096 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.49 ms. Allocated memory is still 138.4 MB. Free memory was 101.1 MB in the beginning and 90.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-22 01:32:04,098 INFO L168 Benchmark]: Boogie Preprocessor took 115.49 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 90.8 MB in the beginning and 177.6 MB in the end (delta: -86.8 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-22 01:32:04,099 INFO L168 Benchmark]: RCFGBuilder took 398.57 ms. Allocated memory is still 200.3 MB. Free memory was 177.6 MB in the beginning and 160.7 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. [2020-08-22 01:32:04,100 INFO L168 Benchmark]: TraceAbstraction took 878.28 ms. Allocated memory is still 200.3 MB. Free memory was 160.0 MB in the beginning and 106.6 MB in the end (delta: 53.4 MB). Peak memory consumption was 53.4 MB. Max. memory is 7.1 GB. [2020-08-22 01:32:04,104 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.79 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 284.49 ms. Allocated memory is still 138.4 MB. Free memory was 101.1 MB in the beginning and 90.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.49 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 90.8 MB in the beginning and 177.6 MB in the end (delta: -86.8 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 398.57 ms. Allocated memory is still 200.3 MB. Free memory was 177.6 MB in the beginning and 160.7 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 878.28 ms. Allocated memory is still 200.3 MB. Free memory was 160.0 MB in the beginning and 106.6 MB in the end (delta: 53.4 MB). Peak memory consumption was 53.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 [L29] COND TRUE i