/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 --rcfgbuilder.size.of.a.code.block SingleStatement --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=SHALLOWEST --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/brs3f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 00:02:56,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 00:02:56,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 00:02:56,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 00:02:56,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 00:02:56,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 00:02:56,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 00:02:56,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 00:02:56,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 00:02:56,600 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 00:02:56,601 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 00:02:56,602 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 00:02:56,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 00:02:56,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 00:02:56,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 00:02:56,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 00:02:56,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 00:02:56,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 00:02:56,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 00:02:56,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 00:02:56,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 00:02:56,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 00:02:56,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 00:02:56,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 00:02:56,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 00:02:56,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 00:02:56,639 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 00:02:56,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 00:02:56,642 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 00:02:56,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 00:02:56,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 00:02:56,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 00:02:56,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 00:02:56,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 00:02:56,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 00:02:56,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 00:02:56,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 00:02:56,651 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 00:02:56,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 00:02:56,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 00:02:56,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 00:02:56,654 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 [2020-09-25 00:02:56,700 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 00:02:56,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 00:02:56,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 00:02:56,703 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 00:02:56,703 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 00:02:56,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 00:02:56,703 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 00:02:56,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 00:02:56,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 00:02:56,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 00:02:56,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 00:02:56,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 00:02:56,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 00:02:56,706 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 00:02:56,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 00:02:56,706 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 00:02:56,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 00:02:56,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 00:02:56,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 00:02:56,707 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 00:02:56,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 00:02:56,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:02:56,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 00:02:56,708 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 00:02:56,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 00:02:56,708 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 00:02:56,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 00:02:56,709 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 00:02:56,709 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 00:02:56,709 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.rcfgbuilder: Size of a code block -> SingleStatement 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=SHALLOWEST;log-additional-information=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=SHALLOWEST;log-additional-information=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=SHALLOWEST;log-additional-information=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=SHALLOWEST;log-additional-information=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=SHALLOWEST;log-additional-information=true; [2020-09-25 00:02:57,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 00:02:57,190 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 00:02:57,196 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 00:02:57,199 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 00:02:57,199 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 00:02:57,201 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3f.c [2020-09-25 00:02:57,278 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d841a7ccf/8e335426ceb646628b295278186c988b/FLAGa8056cdee [2020-09-25 00:02:57,789 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 00:02:57,789 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs3f.c [2020-09-25 00:02:57,798 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d841a7ccf/8e335426ceb646628b295278186c988b/FLAGa8056cdee [2020-09-25 00:02:58,122 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d841a7ccf/8e335426ceb646628b295278186c988b [2020-09-25 00:02:58,139 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 00:02:58,146 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 00:02:58,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 00:02:58,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 00:02:58,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 00:02:58,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:02:58" (1/1) ... [2020-09-25 00:02:58,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@622d9ae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:58, skipping insertion in model container [2020-09-25 00:02:58,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:02:58" (1/1) ... [2020-09-25 00:02:58,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 00:02:58,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 00:02:58,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:02:58,515 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 00:02:58,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:02:58,557 INFO L208 MainTranslator]: Completed translation [2020-09-25 00:02:58,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:58 WrapperNode [2020-09-25 00:02:58,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 00:02:58,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 00:02:58,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 00:02:58,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 00:02:58,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:58" (1/1) ... [2020-09-25 00:02:58,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:58" (1/1) ... [2020-09-25 00:02:58,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:58" (1/1) ... [2020-09-25 00:02:58,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:58" (1/1) ... [2020-09-25 00:02:58,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:58" (1/1) ... [2020-09-25 00:02:58,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:58" (1/1) ... [2020-09-25 00:02:58,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:58" (1/1) ... [2020-09-25 00:02:58,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 00:02:58,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 00:02:58,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 00:02:58,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 00:02:58,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:58" (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 [2020-09-25 00:02:58,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 00:02:58,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 00:02:58,760 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 00:02:58,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 00:02:58,760 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 00:02:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 00:02:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 00:02:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 00:02:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 00:02:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 00:02:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 00:02:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 00:02:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 00:02:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 00:02:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 00:02:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 00:02:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 00:02:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 00:02:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 00:02:59,096 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 00:02:59,096 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 00:02:59,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:02:59 BoogieIcfgContainer [2020-09-25 00:02:59,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 00:02:59,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 00:02:59,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 00:02:59,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 00:02:59,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:02:58" (1/3) ... [2020-09-25 00:02:59,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@150cc933 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:02:59, skipping insertion in model container [2020-09-25 00:02:59,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:58" (2/3) ... [2020-09-25 00:02:59,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@150cc933 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:02:59, skipping insertion in model container [2020-09-25 00:02:59,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:02:59" (3/3) ... [2020-09-25 00:02:59,111 INFO L109 eAbstractionObserver]: Analyzing ICFG brs3f.c [2020-09-25 00:02:59,123 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 00:02:59,133 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 00:02:59,153 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 00:02:59,182 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 00:02:59,182 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 00:02:59,182 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 00:02:59,182 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 00:02:59,183 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 00:02:59,183 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 00:02:59,183 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 00:02:59,183 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 00:02:59,204 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-09-25 00:02:59,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-25 00:02:59,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:02:59,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:02:59,213 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:02:59,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:02:59,220 INFO L82 PathProgramCache]: Analyzing trace with hash 221259408, now seen corresponding path program 1 times [2020-09-25 00:02:59,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:02:59,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486702803] [2020-09-25 00:02:59,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:02:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:02:59,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:02:59,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:02:59,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:02:59,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 00:02:59,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:02:59,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 426 [2020-09-25 00:02:59,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:02:59,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 00:02:59,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 00:02:59,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 00:02:59,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 00:02:59,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:02:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:02:59,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:02:59,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:02:59,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:02:59,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:02:59,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 00:02:59,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:02:59,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:02:59,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:02:59,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:02:59,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:02:59,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-25 00:02:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:02:59,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:02:59,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:02:59,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:02:59,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:02:59,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 00:02:59,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:02:59,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:02:59,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:02:59,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 00:02:59,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:02:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:02:59,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486702803] [2020-09-25 00:02:59,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:02:59,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 00:02:59,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530064502] [2020-09-25 00:03:00,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 00:03:00,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:00,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 00:03:00,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 00:03:00,030 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 5 states. [2020-09-25 00:03:00,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:00,310 INFO L93 Difference]: Finished difference Result 107 states and 125 transitions. [2020-09-25 00:03:00,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 00:03:00,312 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-09-25 00:03:00,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:00,324 INFO L225 Difference]: With dead ends: 107 [2020-09-25 00:03:00,325 INFO L226 Difference]: Without dead ends: 49 [2020-09-25 00:03:00,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 00:03:00,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-25 00:03:00,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-09-25 00:03:00,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-25 00:03:00,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-09-25 00:03:00,390 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 30 [2020-09-25 00:03:00,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:00,391 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-09-25 00:03:00,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 00:03:00,391 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-09-25 00:03:00,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-25 00:03:00,393 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:00,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:03:00,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 00:03:00,394 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:00,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:00,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1707000309, now seen corresponding path program 1 times [2020-09-25 00:03:00,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:00,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295350600] [2020-09-25 00:03:00,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:00,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:00,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:00,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:01,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:02,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:02,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-25 00:03:02,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 00:03:02,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2423 [2020-09-25 00:03:02,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:02,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 00:03:02,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 00:03:02,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 00:03:02,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 00:03:02,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:03:02,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:02,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:03,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:03,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:03:03,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:03,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 00:03:03,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:03,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:03,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:03,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:03,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:03,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-25 00:03:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:03,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:03,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:03,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:03:03,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:03,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 00:03:03,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:03,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:03:03,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:03,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 00:03:03,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 00:03:03,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295350600] [2020-09-25 00:03:03,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:03:03,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 00:03:03,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54086745] [2020-09-25 00:03:03,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 00:03:03,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:03,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 00:03:03,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-25 00:03:03,037 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 8 states. [2020-09-25 00:03:03,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:03,320 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-09-25 00:03:03,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 00:03:03,320 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-09-25 00:03:03,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:03,322 INFO L225 Difference]: With dead ends: 64 [2020-09-25 00:03:03,322 INFO L226 Difference]: Without dead ends: 58 [2020-09-25 00:03:03,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-09-25 00:03:03,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-25 00:03:03,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-09-25 00:03:03,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 00:03:03,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-09-25 00:03:03,346 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 42 [2020-09-25 00:03:03,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:03,347 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-09-25 00:03:03,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 00:03:03,347 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-09-25 00:03:03,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 00:03:03,349 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:03,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:03:03,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 00:03:03,350 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:03,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:03,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1495951507, now seen corresponding path program 1 times [2020-09-25 00:03:03,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:03,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426561016] [2020-09-25 00:03:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:03,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:03,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:03,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:04,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:04,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 00:03:04,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 00:03:04,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 931 [2020-09-25 00:03:04,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:04,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 00:03:04,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 00:03:04,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 00:03:04,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:04,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:03:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:04,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:04,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:04,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:03:04,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:04,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 00:03:04,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:04,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:04,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:04,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:04,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:04,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-25 00:03:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:04,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:04,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:04,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:03:04,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:04,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 00:03:04,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:04,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:03:04,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:04,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 00:03:04,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:03:04,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426561016] [2020-09-25 00:03:04,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:03:04,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 00:03:04,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360224542] [2020-09-25 00:03:04,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 00:03:04,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:04,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 00:03:04,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-09-25 00:03:04,591 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 12 states. [2020-09-25 00:03:05,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:05,328 INFO L93 Difference]: Finished difference Result 114 states and 127 transitions. [2020-09-25 00:03:05,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 00:03:05,329 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-09-25 00:03:05,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:05,330 INFO L225 Difference]: With dead ends: 114 [2020-09-25 00:03:05,330 INFO L226 Difference]: Without dead ends: 67 [2020-09-25 00:03:05,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2020-09-25 00:03:05,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-25 00:03:05,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2020-09-25 00:03:05,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 00:03:05,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-09-25 00:03:05,350 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 46 [2020-09-25 00:03:05,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:05,351 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-09-25 00:03:05,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 00:03:05,351 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-09-25 00:03:05,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-25 00:03:05,354 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:05,354 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:03:05,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 00:03:05,356 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:05,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:05,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1872706551, now seen corresponding path program 1 times [2020-09-25 00:03:05,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:05,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009545924] [2020-09-25 00:03:05,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:05,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:05,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:05,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:05,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:05,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:06,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:08,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:08,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:10,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:10,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 00:03:10,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 00:03:10,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 00:03:10,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:10,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 00:03:10,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 00:03:10,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-25 00:03:10,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:11,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:03:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:11,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:11,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:11,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:03:11,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:11,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 00:03:11,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:11,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:11,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:11,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:11,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:11,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-25 00:03:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:11,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:11,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:11,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:03:11,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:11,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 00:03:11,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:11,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:03:11,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:11,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 00:03:11,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:11,460 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 00:03:11,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009545924] [2020-09-25 00:03:11,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:03:11,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 00:03:11,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117295834] [2020-09-25 00:03:11,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 00:03:11,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:11,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 00:03:11,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2020-09-25 00:03:11,469 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 20 states. [2020-09-25 00:03:12,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:12,792 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-09-25 00:03:12,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-25 00:03:12,792 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2020-09-25 00:03:12,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:12,796 INFO L225 Difference]: With dead ends: 94 [2020-09-25 00:03:12,796 INFO L226 Difference]: Without dead ends: 88 [2020-09-25 00:03:12,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=249, Invalid=1157, Unknown=0, NotChecked=0, Total=1406 [2020-09-25 00:03:12,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-25 00:03:12,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2020-09-25 00:03:12,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-25 00:03:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-09-25 00:03:12,814 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 58 [2020-09-25 00:03:12,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:12,815 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-09-25 00:03:12,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 00:03:12,815 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-09-25 00:03:12,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-25 00:03:12,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:12,819 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:03:12,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 00:03:12,819 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:12,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:12,820 INFO L82 PathProgramCache]: Analyzing trace with hash -557611095, now seen corresponding path program 1 times [2020-09-25 00:03:12,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:12,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505822154] [2020-09-25 00:03:12,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 00:03:12,845 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 00:03:12,846 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 00:03:12,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 00:03:12,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 12:03:12 BoogieIcfgContainer [2020-09-25 00:03:12,891 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 00:03:12,905 INFO L168 Benchmark]: Toolchain (without parser) took 14752.06 ms. Allocated memory was 140.0 MB in the beginning and 327.2 MB in the end (delta: 187.2 MB). Free memory was 103.0 MB in the beginning and 205.8 MB in the end (delta: -102.7 MB). Peak memory consumption was 84.4 MB. Max. memory is 7.1 GB. [2020-09-25 00:03:12,906 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-25 00:03:12,909 INFO L168 Benchmark]: CACSL2BoogieTranslator took 410.22 ms. Allocated memory is still 140.0 MB. Free memory was 102.4 MB in the beginning and 92.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-25 00:03:12,910 INFO L168 Benchmark]: Boogie Preprocessor took 127.04 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 92.0 MB in the beginning and 180.7 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-25 00:03:12,911 INFO L168 Benchmark]: RCFGBuilder took 415.09 ms. Allocated memory is still 203.4 MB. Free memory was 180.7 MB in the beginning and 161.4 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. [2020-09-25 00:03:12,913 INFO L168 Benchmark]: TraceAbstraction took 13788.46 ms. Allocated memory was 203.4 MB in the beginning and 327.2 MB in the end (delta: 123.7 MB). Free memory was 161.4 MB in the beginning and 205.8 MB in the end (delta: -44.3 MB). Peak memory consumption was 79.4 MB. Max. memory is 7.1 GB. [2020-09-25 00:03:12,918 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 410.22 ms. Allocated memory is still 140.0 MB. Free memory was 102.4 MB in the beginning and 92.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.04 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 92.0 MB in the beginning and 180.7 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 415.09 ms. Allocated memory is still 203.4 MB. Free memory was 180.7 MB in the beginning and 161.4 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13788.46 ms. Allocated memory was 203.4 MB in the beginning and 327.2 MB in the end (delta: 123.7 MB). Free memory was 161.4 MB in the beginning and 205.8 MB in the end (delta: -44.3 MB). Peak memory consumption was 79.4 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