/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:47:02,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:47:02,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:47:02,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:47:02,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:47:02,843 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:47:02,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:47:02,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:47:02,848 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:47:02,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:47:02,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:47:02,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:47:02,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:47:02,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:47:02,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:47:02,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:47:02,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:47:02,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:47:02,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:47:02,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:47:02,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:47:02,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:47:02,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:47:02,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:47:02,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:47:02,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:47:02,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:47:02,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:47:02,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:47:02,886 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:47:02,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:47:02,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:47:02,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:47:02,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:47:02,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:47:02,890 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:47:02,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:47:02,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:47:02,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:47:02,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:47:02,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:47:02,893 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 10:47:02,917 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:47:02,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:47:02,918 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:47:02,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:47:02,919 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:47:02,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:47:02,919 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:47:02,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:47:02,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:47:02,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:47:02,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:47:02,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:47:02,920 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:47:02,921 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:47:02,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:47:02,921 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:47:02,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:47:02,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:47:02,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:47:02,922 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:47:02,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:47:02,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:47:02,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:47:02,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:47:02,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:47:02,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:47:02,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:47:02,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:47:02,924 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:47:02,924 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 10:47:03,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:47:03,240 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:47:03,243 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:47:03,247 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:47:03,248 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:47:03,249 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-10-13 10:47:03,300 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f64db7cc/2bd5432da2ba47189e5b2e60a90577fc/FLAG69570d130 [2020-10-13 10:47:03,755 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:47:03,756 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-10-13 10:47:03,762 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f64db7cc/2bd5432da2ba47189e5b2e60a90577fc/FLAG69570d130 [2020-10-13 10:47:04,132 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f64db7cc/2bd5432da2ba47189e5b2e60a90577fc [2020-10-13 10:47:04,140 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:47:04,142 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:47:04,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:47:04,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:47:04,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:47:04,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:47:04" (1/1) ... [2020-10-13 10:47:04,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15a568e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:47:04, skipping insertion in model container [2020-10-13 10:47:04,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:47:04" (1/1) ... [2020-10-13 10:47:04,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:47:04,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:47:04,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:47:04,339 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:47:04,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:47:04,369 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:47:04,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:47:04 WrapperNode [2020-10-13 10:47:04,370 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:47:04,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:47:04,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:47:04,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:47:04,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:47:04" (1/1) ... [2020-10-13 10:47:04,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:47:04" (1/1) ... [2020-10-13 10:47:04,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:47:04" (1/1) ... [2020-10-13 10:47:04,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:47:04" (1/1) ... [2020-10-13 10:47:04,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:47:04" (1/1) ... [2020-10-13 10:47:04,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:47:04" (1/1) ... [2020-10-13 10:47:04,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:47:04" (1/1) ... [2020-10-13 10:47:04,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:47:04,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:47:04,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:47:04,492 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:47:04,493 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:47:04" (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 10:47:04,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:47:04,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:47:04,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:47:04,559 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:47:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:47:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:47:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:47:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:47:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:47:04,726 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:47:04,726 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:47:04,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:47:04 BoogieIcfgContainer [2020-10-13 10:47:04,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:47:04,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:47:04,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:47:04,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:47:04,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:47:04" (1/3) ... [2020-10-13 10:47:04,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ad7933 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:47:04, skipping insertion in model container [2020-10-13 10:47:04,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:47:04" (2/3) ... [2020-10-13 10:47:04,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ad7933 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:47:04, skipping insertion in model container [2020-10-13 10:47:04,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:47:04" (3/3) ... [2020-10-13 10:47:04,742 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2020-10-13 10:47:04,753 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:47:04,760 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:47:04,774 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:47:04,799 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:47:04,800 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:47:04,800 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:47:04,800 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:47:04,800 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:47:04,800 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:47:04,800 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:47:04,801 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:47:04,815 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-13 10:47:04,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:47:04,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:04,822 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:04,823 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:04,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:04,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-10-13 10:47:04,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:04,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651644122] [2020-10-13 10:47:04,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:04,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:04,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:05,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:05,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:47:05,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:47:05,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-13 10:47:05,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:05,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:47:05,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:05,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:47:05,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:47:05,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:05,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:05,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:05,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:05,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:05,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:47:05,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:05,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:05,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:05,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:05,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:05,188 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 10:47:05,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651644122] [2020-10-13 10:47:05,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:47:05,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:47:05,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068490809] [2020-10-13 10:47:05,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:47:05,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:05,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:47:05,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:47:05,217 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-10-13 10:47:05,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:05,325 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-10-13 10:47:05,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:47:05,339 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-13 10:47:05,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:05,347 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:47:05,348 INFO L226 Difference]: Without dead ends: 12 [2020-10-13 10:47:05,352 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 10:47:05,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-13 10:47:05,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-13 10:47:05,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-13 10:47:05,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-13 10:47:05,390 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-10-13 10:47:05,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:05,391 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-13 10:47:05,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:47:05,391 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-13 10:47:05,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-13 10:47:05,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:05,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:05,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:47:05,393 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:05,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:05,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-10-13 10:47:05,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:05,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269912084] [2020-10-13 10:47:05,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:05,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:05,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:05,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:05,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 10:47:05,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:47:05,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-13 10:47:05,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:05,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:47:05,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:05,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:47:05,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:05,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:05,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:05,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:05,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:05,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:05,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:05,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:47:05,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:05,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:05,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:05,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:05,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:05,818 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 10:47:05,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269912084] [2020-10-13 10:47:05,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:05,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:47:05,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622064014] [2020-10-13 10:47:05,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:47:05,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:05,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:47:05,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:47:05,826 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 4 states. [2020-10-13 10:47:05,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:05,854 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-10-13 10:47:05,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:47:05,856 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-13 10:47:05,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:05,858 INFO L225 Difference]: With dead ends: 18 [2020-10-13 10:47:05,858 INFO L226 Difference]: Without dead ends: 13 [2020-10-13 10:47:05,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:47:05,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-13 10:47:05,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-13 10:47:05,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-13 10:47:05,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-13 10:47:05,866 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-10-13 10:47:05,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:05,867 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-13 10:47:05,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:47:05,867 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-13 10:47:05,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:47:05,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:05,869 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:05,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:47:05,869 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:05,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:05,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2020-10-13 10:47:05,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:05,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714873569] [2020-10-13 10:47:05,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:05,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:06,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:06,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:06,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:47:06,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:47:06,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-13 10:47:06,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:06,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:47:06,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:06,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:47:06,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:06,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:06,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:06,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:06,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:06,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:06,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:47:06,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:06,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:06,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:06,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:06,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:06,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714873569] [2020-10-13 10:47:06,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:06,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:47:06,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211567834] [2020-10-13 10:47:06,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:47:06,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:06,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:47:06,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:47:06,145 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-10-13 10:47:06,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:06,178 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-10-13 10:47:06,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:47:06,179 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-13 10:47:06,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:06,180 INFO L225 Difference]: With dead ends: 19 [2020-10-13 10:47:06,180 INFO L226 Difference]: Without dead ends: 14 [2020-10-13 10:47:06,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:47:06,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-13 10:47:06,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-13 10:47:06,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-13 10:47:06,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-13 10:47:06,190 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-13 10:47:06,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:06,190 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-13 10:47:06,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:47:06,190 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-13 10:47:06,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 10:47:06,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:06,191 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:06,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:47:06,192 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:06,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:06,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2020-10-13 10:47:06,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:06,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220618909] [2020-10-13 10:47:06,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:06,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:06,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:06,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:06,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:47:06,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:47:06,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-13 10:47:06,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:06,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:47:06,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:06,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:47:06,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:06,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:06,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:06,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:06,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:06,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:06,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:06,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:06,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:06,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:06,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:06,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:06,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:06,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220618909] [2020-10-13 10:47:06,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:06,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:47:06,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208691322] [2020-10-13 10:47:06,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:47:06,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:06,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:47:06,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:47:06,381 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2020-10-13 10:47:06,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:06,409 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-13 10:47:06,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:47:06,410 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-13 10:47:06,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:06,410 INFO L225 Difference]: With dead ends: 20 [2020-10-13 10:47:06,411 INFO L226 Difference]: Without dead ends: 15 [2020-10-13 10:47:06,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:47:06,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-13 10:47:06,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-13 10:47:06,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 10:47:06,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-13 10:47:06,416 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-13 10:47:06,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:06,417 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-13 10:47:06,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:47:06,417 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-13 10:47:06,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:47:06,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:06,418 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:06,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:47:06,419 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:06,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:06,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2020-10-13 10:47:06,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:06,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945747996] [2020-10-13 10:47:06,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:06,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:06,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:06,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:06,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:47:06,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:47:06,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-13 10:47:06,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:06,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:47:06,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:06,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:47:06,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:06,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:06,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:06,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:06,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:06,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:06,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:06,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:06,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:06,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:06,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:06,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:06,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945747996] [2020-10-13 10:47:06,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:06,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:47:06,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530259728] [2020-10-13 10:47:06,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:47:06,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:06,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:47:06,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:47:06,751 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2020-10-13 10:47:06,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:06,794 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-13 10:47:06,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:47:06,795 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-13 10:47:06,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:06,796 INFO L225 Difference]: With dead ends: 21 [2020-10-13 10:47:06,796 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:47:06,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:47:06,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:47:06,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-13 10:47:06,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-13 10:47:06,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-13 10:47:06,804 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-13 10:47:06,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:06,805 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-13 10:47:06,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:47:06,805 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-13 10:47:06,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 10:47:06,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:06,806 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:06,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:47:06,807 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:06,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:06,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2020-10-13 10:47:06,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:06,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048762363] [2020-10-13 10:47:06,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:06,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:06,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:06,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:06,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:47:06,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:47:06,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-13 10:47:06,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:06,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:47:06,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:06,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:47:06,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:07,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:07,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:07,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:07,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:07,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:07,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:07,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:07,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:07,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:07,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:07,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:07,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048762363] [2020-10-13 10:47:07,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:07,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:47:07,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115035370] [2020-10-13 10:47:07,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:47:07,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:07,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:47:07,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:47:07,094 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2020-10-13 10:47:07,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:07,139 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-13 10:47:07,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:47:07,140 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-10-13 10:47:07,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:07,141 INFO L225 Difference]: With dead ends: 22 [2020-10-13 10:47:07,141 INFO L226 Difference]: Without dead ends: 17 [2020-10-13 10:47:07,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:47:07,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-13 10:47:07,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-13 10:47:07,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 10:47:07,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-13 10:47:07,147 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-13 10:47:07,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:07,148 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-13 10:47:07,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:47:07,148 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-13 10:47:07,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:47:07,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:07,149 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:07,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:47:07,150 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:07,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:07,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 6 times [2020-10-13 10:47:07,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:07,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15879816] [2020-10-13 10:47:07,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-13 10:47:07,162 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-13 10:47:07,162 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 10:47:07,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:47:07,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:47:07 BoogieIcfgContainer [2020-10-13 10:47:07,182 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 10:47:07,185 INFO L168 Benchmark]: Toolchain (without parser) took 3042.27 ms. Allocated memory was 145.8 MB in the beginning and 235.4 MB in the end (delta: 89.7 MB). Free memory was 102.3 MB in the beginning and 92.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 99.8 MB. Max. memory is 7.1 GB. [2020-10-13 10:47:07,186 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 119.9 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. [2020-10-13 10:47:07,187 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.53 ms. Allocated memory is still 145.8 MB. Free memory was 102.3 MB in the beginning and 92.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-10-13 10:47:07,188 INFO L168 Benchmark]: Boogie Preprocessor took 118.86 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 92.9 MB in the beginning and 182.6 MB in the end (delta: -89.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-10-13 10:47:07,189 INFO L168 Benchmark]: RCFGBuilder took 240.63 ms. Allocated memory is still 202.9 MB. Free memory was 182.6 MB in the beginning and 171.0 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-10-13 10:47:07,190 INFO L168 Benchmark]: TraceAbstraction took 2450.24 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 170.0 MB in the beginning and 92.2 MB in the end (delta: 77.8 MB). Peak memory consumption was 110.3 MB. Max. memory is 7.1 GB. [2020-10-13 10:47:07,193 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 119.9 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 227.53 ms. Allocated memory is still 145.8 MB. Free memory was 102.3 MB in the beginning and 92.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.86 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 92.9 MB in the beginning and 182.6 MB in the end (delta: -89.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 240.63 ms. Allocated memory is still 202.9 MB. Free memory was 182.6 MB in the beginning and 171.0 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2450.24 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 170.0 MB in the beginning and 92.2 MB in the end (delta: 77.8 MB). Peak memory consumption was 110.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] unsigned int x = 0; [L12] unsigned int y = 1; [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND FALSE !(x < 6) [L19] CALL __VERIFIER_assert(y != 64) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.3s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 0 SDslu, 166 SDs, 0 SdLazy, 97 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 69 ConstructedInterpolants, 0 QuantifiedInterpolants, 2605 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 0/35 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 incorrect! Received shutdown request...