/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 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=NARROWEST --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 -i ../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:42:43,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:42:43,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:42:43,692 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:42:43,693 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:42:43,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:42:43,704 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:42:43,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:42:43,710 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:42:43,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:42:43,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:42:43,717 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:42:43,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:42:43,720 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:42:43,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:42:43,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:42:43,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:42:43,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:42:43,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:42:43,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:42:43,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:42:43,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:42:43,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:42:43,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:42:43,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:42:43,758 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:42:43,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:42:43,761 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:42:43,762 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:42:43,763 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:42:43,766 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:42:43,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:42:43,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:42:43,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:42:43,775 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:42:43,775 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:42:43,776 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:42:43,776 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:42:43,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:42:43,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:42:43,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:42:43,780 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 [2020-10-13 10:42:43,819 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:42:43,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:42:43,821 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:42:43,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:42:43,822 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:42:43,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:42:43,822 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:42:43,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:42:43,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:42:43,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:42:43,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:42:43,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:42:43,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:42:43,824 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:42:43,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:42:43,825 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:42:43,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:42:43,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:42:43,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:42:43,826 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:42:43,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:42:43,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:42:43,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:42:43,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:42:43,827 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:42:43,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:42:43,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:42:43,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:42:43,828 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:42:43,828 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 -> 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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:42:44,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:42:44,139 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:42:44,147 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:42:44,151 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:42:44,152 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:42:44,153 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-10-13 10:42:44,215 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3bdd0df40/df9c2d4d50e64a728bc85dbee0b900a9/FLAGfbb32cd90 [2020-10-13 10:42:44,643 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:42:44,644 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-10-13 10:42:44,650 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3bdd0df40/df9c2d4d50e64a728bc85dbee0b900a9/FLAGfbb32cd90 [2020-10-13 10:42:44,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3bdd0df40/df9c2d4d50e64a728bc85dbee0b900a9 [2020-10-13 10:42:45,009 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:42:45,011 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:42:45,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:42:45,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:42:45,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:42:45,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:42:45" (1/1) ... [2020-10-13 10:42:45,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56344ce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:45, skipping insertion in model container [2020-10-13 10:42:45,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:42:45" (1/1) ... [2020-10-13 10:42:45,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:42:45,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:42:45,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:42:45,243 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:42:45,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:42:45,278 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:42:45,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:45 WrapperNode [2020-10-13 10:42:45,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:42:45,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:42:45,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:42:45,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:42:45,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:45" (1/1) ... [2020-10-13 10:42:45,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:45" (1/1) ... [2020-10-13 10:42:45,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:45" (1/1) ... [2020-10-13 10:42:45,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:45" (1/1) ... [2020-10-13 10:42:45,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:45" (1/1) ... [2020-10-13 10:42:45,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:45" (1/1) ... [2020-10-13 10:42:45,395 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:45" (1/1) ... [2020-10-13 10:42:45,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:42:45,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:42:45,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:42:45,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:42:45,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:45" (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 [2020-10-13 10:42:45,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:42:45,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:42:45,454 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:42:45,454 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:42:45,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:42:45,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:42:45,455 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:42:45,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 10:42:45,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:42:45,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:42:45,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:42:45,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:42:45,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:42:45,638 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:42:45,638 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:42:45,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:42:45 BoogieIcfgContainer [2020-10-13 10:42:45,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:42:45,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:42:45,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:42:45,647 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:42:45,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:42:45" (1/3) ... [2020-10-13 10:42:45,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c37540e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:42:45, skipping insertion in model container [2020-10-13 10:42:45,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:45" (2/3) ... [2020-10-13 10:42:45,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c37540e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:42:45, skipping insertion in model container [2020-10-13 10:42:45,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:42:45" (3/3) ... [2020-10-13 10:42:45,650 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-10-13 10:42:45,676 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:42:45,685 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:42:45,722 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:42:45,750 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:42:45,751 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:42:45,751 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:42:45,751 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:42:45,751 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:42:45,751 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:42:45,752 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:42:45,752 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:42:45,773 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-13 10:42:45,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:42:45,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:45,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:45,787 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:45,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:45,794 INFO L82 PathProgramCache]: Analyzing trace with hash -267856937, now seen corresponding path program 1 times [2020-10-13 10:42:45,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:45,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507095918] [2020-10-13 10:42:45,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:45,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:45,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:45,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:42:45,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:45,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-13 10:42:45,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:45,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:45,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:42:45,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:45,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:42:46,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:46,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:46,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:46,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:46,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:46,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:42:46,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:46,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:46,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:46,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:46,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:46,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507095918] [2020-10-13 10:42:46,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:46,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:46,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698197807] [2020-10-13 10:42:46,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:46,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:46,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:46,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:46,100 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2020-10-13 10:42:46,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:46,168 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-13 10:42:46,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:46,170 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-13 10:42:46,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:46,179 INFO L225 Difference]: With dead ends: 34 [2020-10-13 10:42:46,179 INFO L226 Difference]: Without dead ends: 14 [2020-10-13 10:42:46,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:46,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-13 10:42:46,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-13 10:42:46,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-13 10:42:46,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-13 10:42:46,218 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-13 10:42:46,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:46,218 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-13 10:42:46,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:46,219 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-13 10:42:46,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:42:46,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:46,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:46,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:42:46,220 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:46,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:46,221 INFO L82 PathProgramCache]: Analyzing trace with hash -439631843, now seen corresponding path program 1 times [2020-10-13 10:42:46,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:46,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821499267] [2020-10-13 10:42:46,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:46,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:46,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:46,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:42:46,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:46,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-13 10:42:46,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:46,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:46,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:42:46,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:42:46,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:46,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:46,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:46,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:46,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:46,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:46,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:42:46,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:46,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:46,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:46,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:46,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:46,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821499267] [2020-10-13 10:42:46,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:46,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:42:46,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814656004] [2020-10-13 10:42:46,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:42:46,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:46,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:42:46,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:42:46,389 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2020-10-13 10:42:46,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:46,427 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-13 10:42:46,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:42:46,428 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-13 10:42:46,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:46,429 INFO L225 Difference]: With dead ends: 22 [2020-10-13 10:42:46,429 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:42:46,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:42:46,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:42:46,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-13 10:42:46,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 10:42:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-13 10:42:46,436 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-10-13 10:42:46,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:46,437 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-13 10:42:46,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:42:46,437 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-13 10:42:46,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:42:46,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:46,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:46,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:42:46,439 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:46,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:46,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1874839487, now seen corresponding path program 1 times [2020-10-13 10:42:46,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:46,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082822765] [2020-10-13 10:42:46,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:46,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:46,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:46,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:46,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:42:46,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:46,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-13 10:42:46,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:46,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:42:46,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:42:46,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:42:46,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:46,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:46,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:46,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:46,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:46,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:46,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:42:46,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:46,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:46,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:46,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:46,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:46,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082822765] [2020-10-13 10:42:46,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:46,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:42:46,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679885359] [2020-10-13 10:42:46,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:42:46,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:46,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:42:46,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:42:46,706 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-10-13 10:42:46,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:46,749 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-13 10:42:46,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:42:46,749 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-13 10:42:46,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:46,750 INFO L225 Difference]: With dead ends: 24 [2020-10-13 10:42:46,750 INFO L226 Difference]: Without dead ends: 18 [2020-10-13 10:42:46,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:42:46,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-13 10:42:46,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-13 10:42:46,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 10:42:46,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-13 10:42:46,757 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-10-13 10:42:46,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:46,758 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-13 10:42:46,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:42:46,758 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-13 10:42:46,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:42:46,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:46,759 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:46,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:42:46,760 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:46,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:46,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1288728289, now seen corresponding path program 2 times [2020-10-13 10:42:46,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:46,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004453413] [2020-10-13 10:42:46,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:46,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:46,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:47,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:47,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:42:47,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:47,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-13 10:42:47,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:47,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:42:47,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:42:47,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:42:47,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:47,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:47,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:47,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:47,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:47,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:47,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:42:47,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:47,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:47,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:47,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:47,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:47,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004453413] [2020-10-13 10:42:47,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:47,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:42:47,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930776545] [2020-10-13 10:42:47,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:42:47,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:47,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:42:47,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:42:47,056 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-10-13 10:42:47,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:47,106 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-13 10:42:47,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:42:47,106 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-13 10:42:47,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:47,107 INFO L225 Difference]: With dead ends: 26 [2020-10-13 10:42:47,108 INFO L226 Difference]: Without dead ends: 20 [2020-10-13 10:42:47,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:42:47,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-13 10:42:47,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-13 10:42:47,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 10:42:47,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-13 10:42:47,114 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-10-13 10:42:47,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:47,114 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-13 10:42:47,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:42:47,114 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-13 10:42:47,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:42:47,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:47,115 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:47,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:42:47,116 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:47,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:47,116 INFO L82 PathProgramCache]: Analyzing trace with hash 676582787, now seen corresponding path program 3 times [2020-10-13 10:42:47,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:47,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748132656] [2020-10-13 10:42:47,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:47,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:47,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:47,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:47,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:42:47,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:47,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-13 10:42:47,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:47,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:42:47,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:42:47,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:42:47,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:47,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:47,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:47,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:47,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:47,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:47,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:42:47,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:47,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:47,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:47,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:47,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:47,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748132656] [2020-10-13 10:42:47,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:47,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:42:47,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229293985] [2020-10-13 10:42:47,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:42:47,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:47,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:42:47,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:42:47,338 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-10-13 10:42:47,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:47,410 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-13 10:42:47,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:42:47,411 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-13 10:42:47,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:47,412 INFO L225 Difference]: With dead ends: 28 [2020-10-13 10:42:47,412 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 10:42:47,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:42:47,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 10:42:47,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-13 10:42:47,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 10:42:47,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-13 10:42:47,420 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-10-13 10:42:47,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:47,421 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-13 10:42:47,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:42:47,421 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-13 10:42:47,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:42:47,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:47,423 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:47,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:42:47,424 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:47,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:47,424 INFO L82 PathProgramCache]: Analyzing trace with hash 815274917, now seen corresponding path program 4 times [2020-10-13 10:42:47,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:47,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943048226] [2020-10-13 10:42:47,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:47,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:47,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:47,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:47,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:42:47,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:47,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-13 10:42:47,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:47,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:42:47,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 10:42:47,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:42:47,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:47,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:47,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:47,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:47,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:47,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:47,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:42:47,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:47,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:47,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:47,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:47,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 10:42:47,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943048226] [2020-10-13 10:42:47,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:47,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 10:42:47,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890490308] [2020-10-13 10:42:47,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:42:47,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:47,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:42:47,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:42:47,906 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 9 states. [2020-10-13 10:42:48,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:48,004 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-13 10:42:48,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:42:48,004 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-13 10:42:48,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:48,005 INFO L225 Difference]: With dead ends: 21 [2020-10-13 10:42:48,005 INFO L226 Difference]: Without dead ends: 0 [2020-10-13 10:42:48,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:42:48,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-13 10:42:48,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-13 10:42:48,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-13 10:42:48,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-13 10:42:48,007 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2020-10-13 10:42:48,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:48,007 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-13 10:42:48,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:42:48,008 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-13 10:42:48,008 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-13 10:42:48,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:42:48,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-13 10:42:48,089 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-13 10:42:48,089 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-13 10:42:48,090 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-13 10:42:48,090 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-13 10:42:48,090 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-13 10:42:48,090 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-13 10:42:48,090 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-13 10:42:48,090 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 10 19) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-10-13 10:42:48,091 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 19) no Hoare annotation was computed. [2020-10-13 10:42:48,091 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (let ((.cse0 (select (select |#memory_int| |main_~#A~0.base|) (+ |main_~#A~0.offset| 4092)))) (and (<= 1023 .cse0) (< 1022 |main_#t~mem1|) (<= .cse0 1023) (<= |main_#t~mem1| 1023))) [2020-10-13 10:42:48,091 INFO L268 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-10-13 10:42:48,091 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 19) no Hoare annotation was computed. [2020-10-13 10:42:48,091 INFO L268 CegarLoopResult]: For program point L14-2(lines 14 16) no Hoare annotation was computed. [2020-10-13 10:42:48,092 INFO L264 CegarLoopResult]: At program point L14-3(lines 14 16) the Hoare annotation is: (or (let ((.cse0 (select (select |#memory_int| |main_~#A~0.base|) (+ |main_~#A~0.offset| 4092)))) (and (<= 1023 .cse0) (<= .cse0 1023))) (<= main_~i~0 1023)) [2020-10-13 10:42:48,092 INFO L268 CegarLoopResult]: For program point L14-4(lines 14 16) no Hoare annotation was computed. [2020-10-13 10:42:48,092 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-10-13 10:42:48,092 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-10-13 10:42:48,092 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-10-13 10:42:48,092 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-10-13 10:42:48,093 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-10-13 10:42:48,093 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-10-13 10:42:48,104 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-13 10:42:48,105 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-13 10:42:48,111 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-13 10:42:48,111 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-13 10:42:48,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:42:48 BoogieIcfgContainer [2020-10-13 10:42:48,115 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 10:42:48,118 INFO L168 Benchmark]: Toolchain (without parser) took 3105.85 ms. Allocated memory was 148.4 MB in the beginning and 242.7 MB in the end (delta: 94.4 MB). Free memory was 102.8 MB in the beginning and 169.6 MB in the end (delta: -66.8 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. [2020-10-13 10:42:48,118 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 148.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-13 10:42:48,119 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.04 ms. Allocated memory is still 148.4 MB. Free memory was 102.6 MB in the beginning and 93.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-10-13 10:42:48,120 INFO L168 Benchmark]: Boogie Preprocessor took 117.30 ms. Allocated memory was 148.4 MB in the beginning and 205.0 MB in the end (delta: 56.6 MB). Free memory was 93.0 MB in the beginning and 182.9 MB in the end (delta: -89.9 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-10-13 10:42:48,121 INFO L168 Benchmark]: RCFGBuilder took 245.08 ms. Allocated memory is still 205.0 MB. Free memory was 182.9 MB in the beginning and 169.5 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-10-13 10:42:48,122 INFO L168 Benchmark]: TraceAbstraction took 2471.14 ms. Allocated memory was 205.0 MB in the beginning and 242.7 MB in the end (delta: 37.7 MB). Free memory was 169.5 MB in the beginning and 169.6 MB in the end (delta: -149.2 kB). Peak memory consumption was 37.6 MB. Max. memory is 7.1 GB. [2020-10-13 10:42:48,126 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 148.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 267.04 ms. Allocated memory is still 148.4 MB. Free memory was 102.6 MB in the beginning and 93.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.30 ms. Allocated memory was 148.4 MB in the beginning and 205.0 MB in the end (delta: 56.6 MB). Free memory was 93.0 MB in the beginning and 182.9 MB in the end (delta: -89.9 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 245.08 ms. Allocated memory is still 205.0 MB. Free memory was 182.9 MB in the beginning and 169.5 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2471.14 ms. Allocated memory was 205.0 MB in the beginning and 242.7 MB in the end (delta: 37.7 MB). Free memory was 169.5 MB in the beginning and 169.6 MB in the end (delta: -149.2 kB). Peak memory consumption was 37.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant [2020-10-13 10:42:48,135 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-13 10:42:48,136 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-13 10:42:48,136 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-13 10:42:48,137 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (1023 <= unknown-#memory_int-unknown[A][A + 4092] && unknown-#memory_int-unknown[A][A + 4092] <= 1023) || i <= 1023 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.2s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 64 SDtfs, 32 SDslu, 96 SDs, 0 SdLazy, 164 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 17 NumberOfFragments, 64 HoareAnnotationTreeSize, 12 FomulaSimplifications, 81 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 49 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 86 ConstructedInterpolants, 0 QuantifiedInterpolants, 3897 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 16/30 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...