/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-fpi/brs4f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:11:23,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:11:23,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:11:23,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:11:23,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:11:23,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:11:23,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:11:23,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:11:23,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:11:23,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:11:23,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:11:23,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:11:23,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:11:23,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:11:23,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:11:23,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:11:23,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:11:23,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:11:23,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:11:23,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:11:23,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:11:23,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:11:23,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:11:23,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:11:23,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:11:23,240 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:11:23,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:11:23,242 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:11:23,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:11:23,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:11:23,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:11:23,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:11:23,253 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:11:23,253 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:11:23,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:11:23,256 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:11:23,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:11:23,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:11:23,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:11:23,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:11:23,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:11:23,262 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 [2020-10-28 09:11:23,321 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:11:23,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:11:23,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:11:23,327 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:11:23,328 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:11:23,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:11:23,329 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:11:23,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:11:23,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:11:23,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:11:23,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:11:23,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:11:23,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:11:23,332 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:11:23,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:11:23,332 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:11:23,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:11:23,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:11:23,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:11:23,334 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:11:23,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:11:23,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:11:23,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:11:23,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:11:23,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:11:23,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:11:23,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:11:23,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:11:23,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:11:23,336 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:11:23,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:11:23,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:11:23,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:11:23,789 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:11:23,790 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:11:23,791 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs4f.c [2020-10-28 09:11:23,875 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/07a24086f/988721b7556f4e4481ceedb125d618f9/FLAGfcbbbd3c1 [2020-10-28 09:11:24,513 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:11:24,514 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs4f.c [2020-10-28 09:11:24,523 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/07a24086f/988721b7556f4e4481ceedb125d618f9/FLAGfcbbbd3c1 [2020-10-28 09:11:24,881 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/07a24086f/988721b7556f4e4481ceedb125d618f9 [2020-10-28 09:11:24,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:11:24,892 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:11:24,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:11:24,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:11:24,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:11:24,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:11:24" (1/1) ... [2020-10-28 09:11:24,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d846b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:24, skipping insertion in model container [2020-10-28 09:11:24,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:11:24" (1/1) ... [2020-10-28 09:11:24,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:11:24,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:11:25,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:11:25,134 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:11:25,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:11:25,179 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:11:25,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:25 WrapperNode [2020-10-28 09:11:25,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:11:25,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:11:25,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:11:25,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:11:25,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:25" (1/1) ... [2020-10-28 09:11:25,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:25" (1/1) ... [2020-10-28 09:11:25,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:25" (1/1) ... [2020-10-28 09:11:25,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:25" (1/1) ... [2020-10-28 09:11:25,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:25" (1/1) ... [2020-10-28 09:11:25,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:25" (1/1) ... [2020-10-28 09:11:25,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:25" (1/1) ... [2020-10-28 09:11:25,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:11:25,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:11:25,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:11:25,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:11:25,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:25" (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 [2020-10-28 09:11:25,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:11:25,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:11:25,328 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:11:25,328 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 09:11:25,328 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:11:25,329 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:11:25,329 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:11:25,329 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:11:25,329 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:11:25,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:11:25,330 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 09:11:25,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:11:25,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:11:25,331 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 09:11:25,331 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:11:25,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 09:11:25,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:11:25,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:11:25,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:11:25,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:11:25,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:11:25,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:11:25,727 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:11:25,743 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 09:11:25,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:11:25 BoogieIcfgContainer [2020-10-28 09:11:25,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:11:25,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:11:25,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:11:25,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:11:25,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:11:24" (1/3) ... [2020-10-28 09:11:25,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47561c01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:11:25, skipping insertion in model container [2020-10-28 09:11:25,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:25" (2/3) ... [2020-10-28 09:11:25,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47561c01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:11:25, skipping insertion in model container [2020-10-28 09:11:25,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:11:25" (3/3) ... [2020-10-28 09:11:25,763 INFO L111 eAbstractionObserver]: Analyzing ICFG brs4f.c [2020-10-28 09:11:25,803 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:11:25,810 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:11:25,826 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:11:25,875 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:11:25,875 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:11:25,875 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:11:25,876 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:11:25,876 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:11:25,876 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:11:25,876 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:11:25,876 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:11:25,910 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-28 09:11:25,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 09:11:25,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:25,919 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] [2020-10-28 09:11:25,920 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:25,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:25,933 INFO L82 PathProgramCache]: Analyzing trace with hash 288317380, now seen corresponding path program 1 times [2020-10-28 09:11:25,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:25,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511433706] [2020-10-28 09:11:25,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:26,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:26,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:26,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:26,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:26,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 09:11:26,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:26,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-28 09:11:26,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:26,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:26,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:26,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:11:26,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:26,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 09:11:26,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:26,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:26,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:26,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:26,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:26,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 09:11:26,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:26,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:26,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:26,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:26,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:26,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:11:26,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:11:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:26,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:26,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:26,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:26,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:26,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:11:26,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:11:26,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:26,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:26,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:26,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:26,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:26,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:11:26,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:11:26,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511433706] [2020-10-28 09:11:26,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:11:26,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:11:26,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712038362] [2020-10-28 09:11:26,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:11:26,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:26,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:11:26,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:11:26,755 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-28 09:11:26,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:26,869 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-10-28 09:11:26,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:11:26,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-28 09:11:26,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:26,878 INFO L225 Difference]: With dead ends: 61 [2020-10-28 09:11:26,879 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 09:11:26,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:11:26,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 09:11:26,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 09:11:26,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 09:11:26,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-28 09:11:26,934 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 22 [2020-10-28 09:11:26,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:26,935 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-28 09:11:26,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:11:26,935 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-28 09:11:26,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 09:11:26,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:26,936 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] [2020-10-28 09:11:26,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:11:26,937 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:26,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:26,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1231035376, now seen corresponding path program 1 times [2020-10-28 09:11:26,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:26,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599779062] [2020-10-28 09:11:26,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:26,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:27,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:27,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:27,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 09:11:27,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:11:27,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-28 09:11:27,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:27,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:27,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:11:27,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:11:27,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:11:27,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 09:11:27,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:27,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:27,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:27,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:27,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:27,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:11:27,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:27,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:27,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:27,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:27,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:27,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:27,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:11:27,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:27,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:27,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:27,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:27,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:27,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:11:27,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:27,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:27,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:11:27,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:27,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:11:27,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:11:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:11:27,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599779062] [2020-10-28 09:11:27,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:11:27,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 09:11:27,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475061871] [2020-10-28 09:11:27,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:11:27,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:27,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:11:27,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:11:27,482 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-28 09:11:27,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:27,632 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-10-28 09:11:27,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:11:27,633 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-28 09:11:27,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:27,634 INFO L225 Difference]: With dead ends: 40 [2020-10-28 09:11:27,634 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 09:11:27,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:11:27,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 09:11:27,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-28 09:11:27,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 09:11:27,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-28 09:11:27,645 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2020-10-28 09:11:27,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:27,645 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-28 09:11:27,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:11:27,645 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-28 09:11:27,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 09:11:27,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:27,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:27,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:11:27,647 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:27,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:27,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1214934215, now seen corresponding path program 1 times [2020-10-28 09:11:27,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:27,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558589801] [2020-10-28 09:11:27,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:27,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:27,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:27,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:27,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:28,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:28,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 09:11:28,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:28,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 844 [2020-10-28 09:11:28,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:28,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:28,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:11:28,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 09:11:28,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 09:11:28,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:11:28,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:28,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:28,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:28,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:28,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:28,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 09:11:28,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:28,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:28,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:28,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:28,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:28,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:28,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:11:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:28,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:28,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:28,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:28,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:28,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:11:28,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:28,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:28,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:28,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:28,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:28,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:11:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:11:28,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558589801] [2020-10-28 09:11:28,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:11:28,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:11:28,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262122699] [2020-10-28 09:11:28,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:11:28,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:28,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:11:28,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:11:28,615 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 4 states. [2020-10-28 09:11:28,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:28,744 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-10-28 09:11:28,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:11:28,745 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-28 09:11:28,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:28,747 INFO L225 Difference]: With dead ends: 48 [2020-10-28 09:11:28,747 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 09:11:28,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:11:28,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 09:11:28,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-28 09:11:28,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 09:11:28,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-28 09:11:28,761 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 28 [2020-10-28 09:11:28,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:28,762 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-28 09:11:28,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:11:28,762 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-28 09:11:28,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 09:11:28,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:28,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:28,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:11:28,765 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:28,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:28,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1894992585, now seen corresponding path program 1 times [2020-10-28 09:11:28,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:28,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690909122] [2020-10-28 09:11:28,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 09:11:28,789 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 09:11:28,789 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 09:11:28,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:11:28,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:11:28 BoogieIcfgContainer [2020-10-28 09:11:28,818 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 09:11:28,822 INFO L168 Benchmark]: Toolchain (without parser) took 3933.06 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 134.8 MB in the beginning and 88.1 MB in the end (delta: 46.6 MB). Peak memory consumption was 79.7 MB. Max. memory is 8.0 GB. [2020-10-28 09:11:28,823 INFO L168 Benchmark]: CDTParser took 0.71 ms. Allocated memory is still 159.4 MB. Free memory was 131.6 MB in the beginning and 131.5 MB in the end (delta: 77.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 09:11:28,825 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.34 ms. Allocated memory is still 159.4 MB. Free memory was 134.2 MB in the beginning and 124.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 09:11:28,826 INFO L168 Benchmark]: Boogie Preprocessor took 48.30 ms. Allocated memory is still 159.4 MB. Free memory was 124.5 MB in the beginning and 122.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 09:11:28,828 INFO L168 Benchmark]: RCFGBuilder took 515.64 ms. Allocated memory is still 159.4 MB. Free memory was 122.8 MB in the beginning and 142.3 MB in the end (delta: -19.6 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. [2020-10-28 09:11:28,832 INFO L168 Benchmark]: TraceAbstraction took 3070.68 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 142.1 MB in the beginning and 88.1 MB in the end (delta: 54.0 MB). Peak memory consumption was 86.5 MB. Max. memory is 8.0 GB. [2020-10-28 09:11:28,844 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.71 ms. Allocated memory is still 159.4 MB. Free memory was 131.6 MB in the beginning and 131.5 MB in the end (delta: 77.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 286.34 ms. Allocated memory is still 159.4 MB. Free memory was 134.2 MB in the beginning and 124.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.30 ms. Allocated memory is still 159.4 MB. Free memory was 124.5 MB in the beginning and 122.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 515.64 ms. Allocated memory is still 159.4 MB. Free memory was 122.8 MB in the beginning and 142.3 MB in the end (delta: -19.6 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3070.68 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 142.1 MB in the beginning and 88.1 MB in the end (delta: 54.0 MB). Peak memory consumption was 86.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] i=0 [L31] COND TRUE i