/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:11:45,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:11:45,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:11:45,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:11:45,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:11:45,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:11:45,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:11:45,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:11:45,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:11:45,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:11:45,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:11:45,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:11:45,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:11:45,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:11:45,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:11:45,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:11:45,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:11:45,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:11:45,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:11:45,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:11:45,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:11:45,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:11:45,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:11:45,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:11:45,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:11:45,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:11:45,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:11:45,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:11:45,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:11:45,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:11:45,888 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:11:45,889 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:11:45,890 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:11:45,891 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:11:45,892 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:11:45,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:11:45,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:11:45,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:11:45,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:11:45,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:11:45,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:11:45,897 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 09:11:45,924 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:11:45,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:11:45,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:11:45,926 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:11:45,926 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:11:45,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:11:45,927 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:11:45,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:11:45,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:11:45,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:11:45,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:11:45,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:11:45,928 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:11:45,928 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:11:45,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:11:45,929 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:11:45,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:11:45,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:11:45,929 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:11:45,929 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:11:45,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:11:45,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:11:45,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:11:45,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:11:45,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:11:45,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:11:45,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:11:45,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:11:45,931 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:11:45,931 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-09-25 09:11:46,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:11:46,479 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:11:46,484 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:11:46,488 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:11:46,490 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:11:46,491 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2020-09-25 09:11:46,590 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4a4272426/6dc81ab2e8b3438ca86d1eb127430dd3/FLAG3c984db40 [2020-09-25 09:11:47,165 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:11:47,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gj2007b.i [2020-09-25 09:11:47,175 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4a4272426/6dc81ab2e8b3438ca86d1eb127430dd3/FLAG3c984db40 [2020-09-25 09:11:47,496 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4a4272426/6dc81ab2e8b3438ca86d1eb127430dd3 [2020-09-25 09:11:47,510 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:11:47,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:11:47,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:11:47,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:11:47,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:11:47,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:11:47" (1/1) ... [2020-09-25 09:11:47,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25b4d004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:47, skipping insertion in model container [2020-09-25 09:11:47,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:11:47" (1/1) ... [2020-09-25 09:11:47,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:11:47,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:11:47,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:11:47,785 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:11:47,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:11:47,822 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:11:47,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:47 WrapperNode [2020-09-25 09:11:47,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:11:47,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:11:47,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:11:47,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:11:47,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:47" (1/1) ... [2020-09-25 09:11:47,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:47" (1/1) ... [2020-09-25 09:11:47,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:47" (1/1) ... [2020-09-25 09:11:47,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:47" (1/1) ... [2020-09-25 09:11:47,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:47" (1/1) ... [2020-09-25 09:11:47,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:47" (1/1) ... [2020-09-25 09:11:47,946 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:47" (1/1) ... [2020-09-25 09:11:47,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:11:47,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:11:47,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:11:47,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:11:47,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:11:48,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:11:48,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:11:48,036 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 09:11:48,036 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 09:11:48,037 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:11:48,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:11:48,038 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 09:11:48,039 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 09:11:48,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 09:11:48,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 09:11:48,040 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:11:48,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:11:48,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:11:48,384 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:11:48,385 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 09:11:48,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:11:48 BoogieIcfgContainer [2020-09-25 09:11:48,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:11:48,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:11:48,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:11:48,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:11:48,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:11:47" (1/3) ... [2020-09-25 09:11:48,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4523bd4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:11:48, skipping insertion in model container [2020-09-25 09:11:48,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:47" (2/3) ... [2020-09-25 09:11:48,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4523bd4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:11:48, skipping insertion in model container [2020-09-25 09:11:48,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:11:48" (3/3) ... [2020-09-25 09:11:48,410 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2020-09-25 09:11:48,421 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:11:48,431 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:11:48,454 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:11:48,484 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:11:48,484 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:11:48,484 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:11:48,484 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:11:48,484 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:11:48,484 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:11:48,485 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:11:48,485 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:11:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-25 09:11:48,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-25 09:11:48,514 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:48,515 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:11:48,515 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:48,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:48,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1007675669, now seen corresponding path program 1 times [2020-09-25 09:11:48,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:48,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418770219] [2020-09-25 09:11:48,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:48,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:48,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:48,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:48,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 09:11:48,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:11:48,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-09-25 09:11:48,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:48,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:48,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:48,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 09:11:48,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:48,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 09:11:48,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:48,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:48,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:48,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:48,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:48,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 09:11:48,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:48,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:48,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:48,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:48,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:48,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:48,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:11:48,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418770219] [2020-09-25 09:11:48,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:11:48,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 09:11:48,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070009285] [2020-09-25 09:11:48,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 09:11:48,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:48,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 09:11:48,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 09:11:48,851 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-09-25 09:11:48,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:48,876 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-09-25 09:11:48,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 09:11:48,878 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-09-25 09:11:48,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:48,889 INFO L225 Difference]: With dead ends: 42 [2020-09-25 09:11:48,889 INFO L226 Difference]: Without dead ends: 24 [2020-09-25 09:11:48,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 09:11:48,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-25 09:11:48,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-25 09:11:48,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-25 09:11:48,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-09-25 09:11:48,939 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2020-09-25 09:11:48,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:48,939 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-09-25 09:11:48,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 09:11:48,940 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-09-25 09:11:48,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-25 09:11:48,941 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:48,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:11:48,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:11:48,942 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:48,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:48,942 INFO L82 PathProgramCache]: Analyzing trace with hash 993822854, now seen corresponding path program 1 times [2020-09-25 09:11:48,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:48,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108043972] [2020-09-25 09:11:48,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:48,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:49,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:49,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:49,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 09:11:49,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:11:49,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-09-25 09:11:49,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:49,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:49,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 09:11:49,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 09:11:49,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-25 09:11:49,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 09:11:49,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:49,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:49,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:49,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:49,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:49,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:11:49,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:49,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:49,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:49,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:49,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:49,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:49,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:11:49,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108043972] [2020-09-25 09:11:49,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:11:49,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 09:11:49,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066120471] [2020-09-25 09:11:49,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 09:11:49,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:49,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 09:11:49,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:11:49,231 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-09-25 09:11:49,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:49,381 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-09-25 09:11:49,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 09:11:49,382 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-09-25 09:11:49,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:49,383 INFO L225 Difference]: With dead ends: 39 [2020-09-25 09:11:49,383 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 09:11:49,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 09:11:49,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 09:11:49,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-09-25 09:11:49,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-25 09:11:49,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-09-25 09:11:49,393 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2020-09-25 09:11:49,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:49,393 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-09-25 09:11:49,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 09:11:49,394 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-09-25 09:11:49,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-25 09:11:49,395 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:49,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:11:49,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:11:49,395 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:49,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:49,396 INFO L82 PathProgramCache]: Analyzing trace with hash -224155731, now seen corresponding path program 1 times [2020-09-25 09:11:49,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:49,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417398234] [2020-09-25 09:11:49,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:49,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:49,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:49,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-25 09:11:49,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:49,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-25 09:11:49,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:49,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:49,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:11:49,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 09:11:49,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 09:11:49,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:49,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:49,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:49,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:49,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:49,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:49,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:11:49,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:49,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:49,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:49,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:49,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:49,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:49,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 09:11:49,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417398234] [2020-09-25 09:11:49,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:11:49,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 09:11:49,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245383483] [2020-09-25 09:11:49,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:11:49,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:49,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:11:49,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:11:49,520 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-09-25 09:11:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:49,567 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-09-25 09:11:49,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:11:49,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-09-25 09:11:49,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:49,569 INFO L225 Difference]: With dead ends: 40 [2020-09-25 09:11:49,569 INFO L226 Difference]: Without dead ends: 38 [2020-09-25 09:11:49,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:11:49,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-25 09:11:49,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-09-25 09:11:49,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-25 09:11:49,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-09-25 09:11:49,579 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 19 [2020-09-25 09:11:49,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:49,580 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-09-25 09:11:49,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:11:49,580 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-09-25 09:11:49,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 09:11:49,582 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:49,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:11:49,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 09:11:49,582 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:49,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:49,583 INFO L82 PathProgramCache]: Analyzing trace with hash 2096508511, now seen corresponding path program 1 times [2020-09-25 09:11:49,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:49,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703893503] [2020-09-25 09:11:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:49,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:49,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:49,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:49,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 09:11:49,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:11:49,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-09-25 09:11:49,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:49,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:49,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 09:11:49,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 09:11:49,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 09:11:49,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:49,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:49,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:49,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:49,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:49,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:49,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:11:49,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:49,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:49,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:49,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:49,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:49,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 18 [2020-09-25 09:11:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:11:49,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703893503] [2020-09-25 09:11:49,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:49,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 09:11:49,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714778646] [2020-09-25 09:11:49,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 09:11:49,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:49,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 09:11:49,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:11:49,944 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 6 states. [2020-09-25 09:11:50,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:50,016 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-09-25 09:11:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 09:11:50,016 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-09-25 09:11:50,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:50,018 INFO L225 Difference]: With dead ends: 57 [2020-09-25 09:11:50,018 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 09:11:50,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 09:11:50,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 09:11:50,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-09-25 09:11:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-25 09:11:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-09-25 09:11:50,026 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 20 [2020-09-25 09:11:50,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:50,026 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-09-25 09:11:50,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 09:11:50,027 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-09-25 09:11:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-25 09:11:50,028 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:50,028 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:11:50,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 09:11:50,028 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:50,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:50,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1151527866, now seen corresponding path program 1 times [2020-09-25 09:11:50,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:50,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114516118] [2020-09-25 09:11:50,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:50,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:50,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:50,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:50,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 09:11:50,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:11:50,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-09-25 09:11:50,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:50,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:50,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:11:50,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 09:11:50,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 09:11:50,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:50,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:50,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:50,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:50,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:50,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:50,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:11:50,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:50,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:50,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:50,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:50,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:50,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:11:50,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114516118] [2020-09-25 09:11:50,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:50,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 09:11:50,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884073806] [2020-09-25 09:11:50,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:11:50,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:50,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:11:50,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:11:50,335 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 7 states. [2020-09-25 09:11:50,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:50,425 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-09-25 09:11:50,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 09:11:50,426 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-09-25 09:11:50,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:50,427 INFO L225 Difference]: With dead ends: 44 [2020-09-25 09:11:50,427 INFO L226 Difference]: Without dead ends: 40 [2020-09-25 09:11:50,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:11:50,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-25 09:11:50,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-09-25 09:11:50,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 09:11:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-09-25 09:11:50,435 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 25 [2020-09-25 09:11:50,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:50,436 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-09-25 09:11:50,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:11:50,436 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-09-25 09:11:50,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-25 09:11:50,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:50,438 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:11:50,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 09:11:50,438 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:50,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:50,439 INFO L82 PathProgramCache]: Analyzing trace with hash -2086501752, now seen corresponding path program 1 times [2020-09-25 09:11:50,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:50,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364562927] [2020-09-25 09:11:50,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:50,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:50,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:50,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 09:11:50,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:50,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-09-25 09:11:50,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:50,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:50,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 09:11:50,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 09:11:50,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 09:11:50,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:50,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:50,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:50,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:50,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:50,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:50,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:11:50,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:50,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:50,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:50,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:50,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:50,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:50,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-25 09:11:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:50,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:50,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:50,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:50,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:50,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 09:11:50,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:50,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:50,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:50,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:50,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:50,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:50,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 09:11:50,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364562927] [2020-09-25 09:11:50,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:11:50,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 09:11:50,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553524961] [2020-09-25 09:11:50,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 09:11:50,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:50,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 09:11:50,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:11:50,658 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 6 states. [2020-09-25 09:11:50,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:50,735 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-09-25 09:11:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 09:11:50,735 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-09-25 09:11:50,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:50,736 INFO L225 Difference]: With dead ends: 43 [2020-09-25 09:11:50,736 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 09:11:50,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 09:11:50,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 09:11:50,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 09:11:50,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 09:11:50,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 09:11:50,739 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2020-09-25 09:11:50,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:50,739 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 09:11:50,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 09:11:50,739 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 09:11:50,739 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 09:11:50,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 09:11:50,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 09:11:50,907 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-25 09:11:50,908 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 09:11:50,908 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 09:11:50,908 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 09:11:50,908 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 09:11:50,908 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 09:11:50,908 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-25 09:11:50,908 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-25 09:11:50,909 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-25 09:11:50,909 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-25 09:11:50,909 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-25 09:11:50,909 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 26) no Hoare annotation was computed. [2020-09-25 09:11:50,909 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 0))) (or (and .cse0 (<= main_~x~0 0)) (= main_~m~0 0) (and (<= 1 main_~x~0) (<= 1 main_~m~0) (or .cse0 (< main_~m~0 main_~n~0))))) [2020-09-25 09:11:50,910 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-09-25 09:11:50,910 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-25 09:11:50,910 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 22) the Hoare annotation is: (let ((.cse0 (= main_~m~0 0)) (.cse1 (<= 1 main_~x~0))) (or (and .cse0 (= main_~x~0 0)) (and .cse1 .cse0) (and .cse1 (<= 1 main_~m~0) (or (<= main_~n~0 0) (< main_~m~0 main_~n~0))))) [2020-09-25 09:11:50,910 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 22) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 0))) (or (and .cse0 (<= main_~x~0 0)) (= main_~m~0 0) (and (<= 1 main_~x~0) (<= 1 main_~m~0) (or .cse0 (< main_~m~0 main_~n~0))))) [2020-09-25 09:11:50,911 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 26) no Hoare annotation was computed. [2020-09-25 09:11:50,911 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 26) the Hoare annotation is: true [2020-09-25 09:11:50,911 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-09-25 09:11:50,911 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-25 09:11:50,911 INFO L268 CegarLoopResult]: For program point L18-1(lines 18 20) no Hoare annotation was computed. [2020-09-25 09:11:50,911 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-25 09:11:50,912 INFO L268 CegarLoopResult]: For program point L18-2(line 18) no Hoare annotation was computed. [2020-09-25 09:11:50,912 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-09-25 09:11:50,912 INFO L268 CegarLoopResult]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-09-25 09:11:50,912 INFO L268 CegarLoopResult]: For program point L18-4(line 18) no Hoare annotation was computed. [2020-09-25 09:11:50,912 INFO L268 CegarLoopResult]: For program point L18-5(lines 18 20) no Hoare annotation was computed. [2020-09-25 09:11:50,912 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-25 09:11:50,913 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-25 09:11:50,913 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-25 09:11:50,913 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-25 09:11:50,913 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-25 09:11:50,913 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-25 09:11:50,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 09:11:50 BoogieIcfgContainer [2020-09-25 09:11:50,938 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 09:11:50,942 INFO L168 Benchmark]: Toolchain (without parser) took 3427.78 ms. Allocated memory was 139.5 MB in the beginning and 230.2 MB in the end (delta: 90.7 MB). Free memory was 101.0 MB in the beginning and 106.1 MB in the end (delta: -5.1 MB). Peak memory consumption was 85.6 MB. Max. memory is 7.1 GB. [2020-09-25 09:11:50,943 INFO L168 Benchmark]: CDTParser took 0.56 ms. Allocated memory is still 139.5 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 09:11:50,944 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.76 ms. Allocated memory is still 139.5 MB. Free memory was 100.4 MB in the beginning and 91.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-25 09:11:50,945 INFO L168 Benchmark]: Boogie Preprocessor took 124.10 ms. Allocated memory was 139.5 MB in the beginning and 200.3 MB in the end (delta: 60.8 MB). Free memory was 91.0 MB in the beginning and 179.3 MB in the end (delta: -88.3 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-09-25 09:11:50,946 INFO L168 Benchmark]: RCFGBuilder took 441.57 ms. Allocated memory is still 200.3 MB. Free memory was 178.3 MB in the beginning and 165.5 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-25 09:11:50,947 INFO L168 Benchmark]: TraceAbstraction took 2541.56 ms. Allocated memory was 200.3 MB in the beginning and 230.2 MB in the end (delta: 29.9 MB). Free memory was 165.5 MB in the beginning and 106.1 MB in the end (delta: 59.4 MB). Peak memory consumption was 89.3 MB. Max. memory is 7.1 GB. [2020-09-25 09:11:50,951 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56 ms. Allocated memory is still 139.5 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 304.76 ms. Allocated memory is still 139.5 MB. Free memory was 100.4 MB in the beginning and 91.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.10 ms. Allocated memory was 139.5 MB in the beginning and 200.3 MB in the end (delta: 60.8 MB). Free memory was 91.0 MB in the beginning and 179.3 MB in the end (delta: -88.3 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 441.57 ms. Allocated memory is still 200.3 MB. Free memory was 178.3 MB in the beginning and 165.5 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2541.56 ms. Allocated memory was 200.3 MB in the beginning and 230.2 MB in the end (delta: 29.9 MB). Free memory was 165.5 MB in the beginning and 106.1 MB in the end (delta: 59.4 MB). Peak memory consumption was 89.3 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: 17]: Loop Invariant Derived loop invariant: ((m == 0 && x == 0) || (1 <= x && m == 0)) || ((1 <= x && 1 <= m) && (n <= 0 || m < n)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.2s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 151 SDtfs, 74 SDslu, 381 SDs, 0 SdLazy, 165 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=5, 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, 23 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 16 PreInvPairs, 26 NumberOfFragments, 84 HoareAnnotationTreeSize, 16 FomulaSimplifications, 37 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 9 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 122 NumberOfCodeBlocks, 122 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 116 ConstructedInterpolants, 0 QuantifiedInterpolants, 5896 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 12/16 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...