/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-new/count_by_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:52:36,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:52:36,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:52:36,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:52:36,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:52:36,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:52:36,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:52:36,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:52:36,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:52:36,735 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:52:36,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:52:36,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:52:36,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:52:36,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:52:36,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:52:36,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:52:36,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:52:36,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:52:36,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:52:36,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:52:36,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:52:36,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:52:36,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:52:36,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:52:36,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:52:36,770 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:52:36,770 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:52:36,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:52:36,775 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:52:36,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:52:36,776 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:52:36,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:52:36,777 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:52:36,777 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:52:36,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:52:36,782 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:52:36,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:52:36,782 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:52:36,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:52:36,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:52:36,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:52:36,787 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 10:52:36,827 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:52:36,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:52:36,829 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:52:36,829 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:52:36,829 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:52:36,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:52:36,830 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:52:36,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:52:36,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:52:36,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:52:36,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:52:36,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:52:36,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:52:36,831 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:52:36,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:52:36,831 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:52:36,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:52:36,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:52:36,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:52:36,832 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:52:36,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:52:36,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:52:36,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:52:36,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:52:36,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:52:36,833 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:52:36,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:52:36,834 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:52:36,834 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:52:36,834 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 10:52:37,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:52:37,120 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:52:37,123 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:52:37,125 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:52:37,125 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:52:37,126 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1.i [2020-10-13 10:52:37,188 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/481627d30/c7be11b559d94740bb263c8986cdd0e8/FLAGfdbf6f4b3 [2020-10-13 10:52:37,617 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:52:37,618 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-new/count_by_1.i [2020-10-13 10:52:37,624 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/481627d30/c7be11b559d94740bb263c8986cdd0e8/FLAGfdbf6f4b3 [2020-10-13 10:52:38,011 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/481627d30/c7be11b559d94740bb263c8986cdd0e8 [2020-10-13 10:52:38,021 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:52:38,023 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:52:38,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:52:38,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:52:38,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:52:38,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:52:38" (1/1) ... [2020-10-13 10:52:38,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@593ffdbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:52:38, skipping insertion in model container [2020-10-13 10:52:38,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:52:38" (1/1) ... [2020-10-13 10:52:38,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:52:38,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:52:38,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:52:38,218 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:52:38,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:52:38,245 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:52:38,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:52:38 WrapperNode [2020-10-13 10:52:38,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:52:38,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:52:38,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:52:38,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:52:38,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:52:38" (1/1) ... [2020-10-13 10:52:38,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:52:38" (1/1) ... [2020-10-13 10:52:38,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:52:38" (1/1) ... [2020-10-13 10:52:38,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:52:38" (1/1) ... [2020-10-13 10:52:38,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:52:38" (1/1) ... [2020-10-13 10:52:38,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:52:38" (1/1) ... [2020-10-13 10:52:38,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:52:38" (1/1) ... [2020-10-13 10:52:38,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:52:38,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:52:38,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:52:38,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:52:38,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:52:38" (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 10:52:38,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:52:38,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:52:38,419 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 10:52:38,419 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:52:38,419 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:52:38,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:52:38,419 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:52:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 10:52:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:52:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:52:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:52:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:52:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:52:38,588 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:52:38,588 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:52:38,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:52:38 BoogieIcfgContainer [2020-10-13 10:52:38,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:52:38,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:52:38,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:52:38,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:52:38,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:52:38" (1/3) ... [2020-10-13 10:52:38,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d5257cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:52:38, skipping insertion in model container [2020-10-13 10:52:38,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:52:38" (2/3) ... [2020-10-13 10:52:38,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d5257cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:52:38, skipping insertion in model container [2020-10-13 10:52:38,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:52:38" (3/3) ... [2020-10-13 10:52:38,600 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_1.i [2020-10-13 10:52:38,610 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:52:38,617 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:52:38,629 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:52:38,652 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:52:38,652 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:52:38,652 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:52:38,652 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:52:38,652 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:52:38,653 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:52:38,653 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:52:38,653 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:52:38,667 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-13 10:52:38,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:52:38,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:38,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:38,673 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:38,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:38,678 INFO L82 PathProgramCache]: Analyzing trace with hash 650151859, now seen corresponding path program 1 times [2020-10-13 10:52:38,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:38,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952023752] [2020-10-13 10:52:38,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:38,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:38,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:38,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:52:38,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:38,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-13 10:52:38,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:38,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:52:38,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:38,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:52:38,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:52:38,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:38,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:38,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:38,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:38,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:38,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:52:38,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:38,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:38,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:38,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:38,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:38,892 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 10:52:38,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952023752] [2020-10-13 10:52:38,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:52:38,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:52:38,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320502091] [2020-10-13 10:52:38,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:52:38,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:38,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:52:38,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:52:38,918 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-10-13 10:52:38,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:38,959 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-13 10:52:38,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:52:38,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-13 10:52:38,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:38,969 INFO L225 Difference]: With dead ends: 33 [2020-10-13 10:52:38,969 INFO L226 Difference]: Without dead ends: 14 [2020-10-13 10:52:38,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 10:52:38,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-13 10:52:39,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-10-13 10:52:39,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-13 10:52:39,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-13 10:52:39,019 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-10-13 10:52:39,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:39,019 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-13 10:52:39,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:52:39,020 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-13 10:52:39,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:52:39,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:39,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:39,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:52:39,023 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:39,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:39,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1133927695, now seen corresponding path program 1 times [2020-10-13 10:52:39,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:39,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836612632] [2020-10-13 10:52:39,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:39,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:39,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:39,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:39,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:52:39,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:39,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-13 10:52:39,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:39,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:52:39,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:39,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:52:39,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:39,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:39,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:39,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:39,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:39,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:39,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:52:39,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:39,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:39,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:39,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:39,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:52:39,227 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 10:52:39,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836612632] [2020-10-13 10:52:39,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:39,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:52:39,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031173748] [2020-10-13 10:52:39,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:52:39,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:39,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:52:39,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:52:39,232 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-10-13 10:52:39,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:39,255 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-13 10:52:39,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:52:39,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-13 10:52:39,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:39,257 INFO L225 Difference]: With dead ends: 21 [2020-10-13 10:52:39,257 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:52:39,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:52:39,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:52:39,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-13 10:52:39,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 10:52:39,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-13 10:52:39,265 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-10-13 10:52:39,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:39,265 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-13 10:52:39,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:52:39,266 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-13 10:52:39,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:52:39,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:39,267 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:39,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:52:39,267 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:39,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:39,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1942427985, now seen corresponding path program 2 times [2020-10-13 10:52:39,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:39,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423355048] [2020-10-13 10:52:39,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:39,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:39,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:39,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:39,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:52:39,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:39,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-13 10:52:39,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:39,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:52:39,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:39,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:52:39,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:39,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:39,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:39,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:39,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:39,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:39,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:39,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:39,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:39,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:39,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:39,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:39,501 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 10:52:39,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423355048] [2020-10-13 10:52:39,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:39,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:52:39,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474218121] [2020-10-13 10:52:39,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:52:39,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:39,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:52:39,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:52:39,503 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-10-13 10:52:39,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:39,529 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-13 10:52:39,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:52:39,529 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-13 10:52:39,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:39,530 INFO L225 Difference]: With dead ends: 23 [2020-10-13 10:52:39,530 INFO L226 Difference]: Without dead ends: 18 [2020-10-13 10:52:39,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:52:39,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-13 10:52:39,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-13 10:52:39,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 10:52:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-13 10:52:39,536 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-10-13 10:52:39,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:39,536 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-13 10:52:39,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:52:39,537 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-13 10:52:39,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:52:39,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:39,537 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:39,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:52:39,538 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:39,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:39,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1522126099, now seen corresponding path program 3 times [2020-10-13 10:52:39,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:39,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629744755] [2020-10-13 10:52:39,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:39,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:39,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:39,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:39,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:52:39,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:39,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-13 10:52:39,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:39,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:52:39,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:52:39,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:52:39,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:39,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:39,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:39,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:39,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:39,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:39,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:39,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:39,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:39,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:39,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:39,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:52:39,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629744755] [2020-10-13 10:52:39,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:52:39,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 10:52:39,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755699156] [2020-10-13 10:52:39,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:52:39,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:39,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:52:39,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:52:39,788 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 7 states. [2020-10-13 10:52:39,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:39,837 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-10-13 10:52:39,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:52:39,838 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-13 10:52:39,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:39,838 INFO L225 Difference]: With dead ends: 17 [2020-10-13 10:52:39,838 INFO L226 Difference]: Without dead ends: 0 [2020-10-13 10:52:39,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:52:39,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-13 10:52:39,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-13 10:52:39,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-13 10:52:39,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-13 10:52:39,840 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-10-13 10:52:39,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:39,841 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-13 10:52:39,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:52:39,841 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-13 10:52:39,841 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-13 10:52:39,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:52:39,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-13 10:52:39,881 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-13 10:52:39,881 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-13 10:52:39,882 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-13 10:52:39,882 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-13 10:52:39,882 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-13 10:52:39,882 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-13 10:52:39,882 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-10-13 10:52:39,882 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-10-13 10:52:39,883 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-10-13 10:52:39,883 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-10-13 10:52:39,883 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 18) the Hoare annotation is: true [2020-10-13 10:52:39,883 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 18) no Hoare annotation was computed. [2020-10-13 10:52:39,883 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-10-13 10:52:39,883 INFO L268 CegarLoopResult]: For program point L15-2(line 15) no Hoare annotation was computed. [2020-10-13 10:52:39,883 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 18) no Hoare annotation was computed. [2020-10-13 10:52:39,884 INFO L264 CegarLoopResult]: At program point L15-3(line 15) the Hoare annotation is: (<= main_~i~0 1000000) [2020-10-13 10:52:39,884 INFO L264 CegarLoopResult]: At program point L15-4(line 15) the Hoare annotation is: (and (<= main_~i~0 1000000) (< 999999 main_~i~0)) [2020-10-13 10:52:39,884 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-10-13 10:52:39,884 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-10-13 10:52:39,885 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-10-13 10:52:39,885 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-10-13 10:52:39,885 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-10-13 10:52:39,885 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-10-13 10:52:39,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:52:39 BoogieIcfgContainer [2020-10-13 10:52:39,903 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 10:52:39,906 INFO L168 Benchmark]: Toolchain (without parser) took 1882.07 ms. Allocated memory was 141.0 MB in the beginning and 232.8 MB in the end (delta: 91.8 MB). Free memory was 104.0 MB in the beginning and 195.1 MB in the end (delta: -91.1 MB). Peak memory consumption was 637.9 kB. Max. memory is 7.1 GB. [2020-10-13 10:52:39,907 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-13 10:52:39,908 INFO L168 Benchmark]: CACSL2BoogieTranslator took 222.31 ms. Allocated memory is still 141.0 MB. Free memory was 103.8 MB in the beginning and 94.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-10-13 10:52:39,909 INFO L168 Benchmark]: Boogie Preprocessor took 104.82 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 94.5 MB in the beginning and 183.1 MB in the end (delta: -88.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-10-13 10:52:39,910 INFO L168 Benchmark]: RCFGBuilder took 240.36 ms. Allocated memory is still 203.9 MB. Free memory was 182.4 MB in the beginning and 170.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-10-13 10:52:39,911 INFO L168 Benchmark]: TraceAbstraction took 1309.48 ms. Allocated memory was 203.9 MB in the beginning and 232.8 MB in the end (delta: 28.8 MB). Free memory was 170.0 MB in the beginning and 195.1 MB in the end (delta: -25.1 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. [2020-10-13 10:52:39,915 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 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 222.31 ms. Allocated memory is still 141.0 MB. Free memory was 103.8 MB in the beginning and 94.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 104.82 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 94.5 MB in the beginning and 183.1 MB in the end (delta: -88.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 240.36 ms. Allocated memory is still 203.9 MB. Free memory was 182.4 MB in the beginning and 170.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1309.48 ms. Allocated memory was 203.9 MB in the beginning and 232.8 MB in the end (delta: 28.8 MB). Free memory was 170.0 MB in the beginning and 195.1 MB in the end (delta: -25.1 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 15]: Loop Invariant Derived loop invariant: i <= 1000000 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 43 SDtfs, 10 SDslu, 68 SDs, 0 SdLazy, 40 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 10 PreInvPairs, 14 NumberOfFragments, 15 HoareAnnotationTreeSize, 10 FomulaSimplifications, 14 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 52 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 48 ConstructedInterpolants, 0 QuantifiedInterpolants, 1020 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 9/14 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...