/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=0.4 --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-acceleration/underapprox_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 05:43:48,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 05:43:48,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 05:43:48,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 05:43:48,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 05:43:48,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 05:43:48,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 05:43:48,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 05:43:48,759 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 05:43:48,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 05:43:48,762 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 05:43:48,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 05:43:48,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 05:43:48,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 05:43:48,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 05:43:48,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 05:43:48,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 05:43:48,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 05:43:48,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 05:43:48,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 05:43:48,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 05:43:48,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 05:43:48,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 05:43:48,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 05:43:48,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 05:43:48,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 05:43:48,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 05:43:48,782 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 05:43:48,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 05:43:48,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 05:43:48,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 05:43:48,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 05:43:48,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 05:43:48,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 05:43:48,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 05:43:48,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 05:43:48,789 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 05:43:48,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 05:43:48,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 05:43:48,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 05:43:48,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 05:43:48,792 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 05:43:48,819 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 05:43:48,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 05:43:48,820 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 05:43:48,821 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 05:43:48,821 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 05:43:48,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 05:43:48,821 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 05:43:48,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 05:43:48,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 05:43:48,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 05:43:48,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 05:43:48,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 05:43:48,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 05:43:48,823 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 05:43:48,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 05:43:48,823 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 05:43:48,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 05:43:48,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 05:43:48,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 05:43:48,824 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 05:43:48,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 05:43:48,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:43:48,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 05:43:48,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 05:43:48,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 05:43:48,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 05:43:48,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 05:43:48,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 05:43:48,827 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 05:43:48,827 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=0.4;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=0.4;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=0.4;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=0.4;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=0.4;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=0.4;log-additional-information=true; [2020-09-25 05:43:49,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 05:43:49,375 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 05:43:49,379 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 05:43:49,381 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 05:43:49,383 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 05:43:49,384 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-09-25 05:43:49,462 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77251f4f7/7786036b13bd4a4aadbe3008c87f2d56/FLAGa6e6e20cb [2020-09-25 05:43:50,004 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 05:43:50,005 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-09-25 05:43:50,013 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77251f4f7/7786036b13bd4a4aadbe3008c87f2d56/FLAGa6e6e20cb [2020-09-25 05:43:50,346 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77251f4f7/7786036b13bd4a4aadbe3008c87f2d56 [2020-09-25 05:43:50,363 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 05:43:50,370 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 05:43:50,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 05:43:50,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 05:43:50,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 05:43:50,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:43:50" (1/1) ... [2020-09-25 05:43:50,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a765448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:50, skipping insertion in model container [2020-09-25 05:43:50,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:43:50" (1/1) ... [2020-09-25 05:43:50,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 05:43:50,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 05:43:50,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:43:50,622 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 05:43:50,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:43:50,652 INFO L208 MainTranslator]: Completed translation [2020-09-25 05:43:50,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:50 WrapperNode [2020-09-25 05:43:50,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 05:43:50,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 05:43:50,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 05:43:50,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 05:43:50,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:50" (1/1) ... [2020-09-25 05:43:50,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:50" (1/1) ... [2020-09-25 05:43:50,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:50" (1/1) ... [2020-09-25 05:43:50,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:50" (1/1) ... [2020-09-25 05:43:50,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:50" (1/1) ... [2020-09-25 05:43:50,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:50" (1/1) ... [2020-09-25 05:43:50,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:50" (1/1) ... [2020-09-25 05:43:50,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 05:43:50,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 05:43:50,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 05:43:50,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 05:43:50,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:50" (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 05:43:50,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 05:43:50,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 05:43:50,842 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 05:43:50,842 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 05:43:50,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 05:43:50,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 05:43:50,843 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 05:43:50,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 05:43:50,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 05:43:51,046 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 05:43:51,046 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 05:43:51,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:43:51 BoogieIcfgContainer [2020-09-25 05:43:51,068 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 05:43:51,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 05:43:51,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 05:43:51,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 05:43:51,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 05:43:50" (1/3) ... [2020-09-25 05:43:51,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641bba1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:43:51, skipping insertion in model container [2020-09-25 05:43:51,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:50" (2/3) ... [2020-09-25 05:43:51,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641bba1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:43:51, skipping insertion in model container [2020-09-25 05:43:51,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:43:51" (3/3) ... [2020-09-25 05:43:51,097 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2020-09-25 05:43:51,119 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 05:43:51,131 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 05:43:51,157 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 05:43:51,200 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 05:43:51,200 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 05:43:51,200 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 05:43:51,201 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 05:43:51,201 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 05:43:51,201 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 05:43:51,201 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 05:43:51,201 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 05:43:51,221 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-09-25 05:43:51,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-25 05:43:51,228 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:51,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:51,230 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:51,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:51,238 INFO L82 PathProgramCache]: Analyzing trace with hash 493765703, now seen corresponding path program 1 times [2020-09-25 05:43:51,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:51,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982284023] [2020-09-25 05:43:51,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:51,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:51,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:51,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:51,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 05:43:51,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:43:51,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-09-25 05:43:51,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:51,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:51,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:51,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 05:43:51,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:51,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 05:43:51,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:51,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:51,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:51,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:43:51,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:51,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 05:43:51,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:51,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:51,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:51,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:51,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:51,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:51,507 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 05:43:51,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982284023] [2020-09-25 05:43:51,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:43:51,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 05:43:51,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487408821] [2020-09-25 05:43:51,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 05:43:51,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:51,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 05:43:51,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 05:43:51,537 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-09-25 05:43:51,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:51,564 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-09-25 05:43:51,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 05:43:51,566 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-25 05:43:51,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:51,574 INFO L225 Difference]: With dead ends: 33 [2020-09-25 05:43:51,575 INFO L226 Difference]: Without dead ends: 16 [2020-09-25 05:43:51,579 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 05:43:51,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-25 05:43:51,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-09-25 05:43:51,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-25 05:43:51,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-09-25 05:43:51,618 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2020-09-25 05:43:51,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:51,619 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-09-25 05:43:51,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 05:43:51,619 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-09-25 05:43:51,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-25 05:43:51,620 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:51,620 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:51,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 05:43:51,621 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:51,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:51,622 INFO L82 PathProgramCache]: Analyzing trace with hash 486377535, now seen corresponding path program 1 times [2020-09-25 05:43:51,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:51,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821742254] [2020-09-25 05:43:51,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:51,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:51,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:51,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:51,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 05:43:51,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:43:51,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-09-25 05:43:51,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:51,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:51,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:43:51,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 05:43:51,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-25 05:43:51,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:51,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:51,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:51,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:51,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:43:51,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:51,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 05:43:51,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:51,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:51,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:51,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:51,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:51,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:51,889 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 05:43:51,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821742254] [2020-09-25 05:43:51,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:43:51,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 05:43:51,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912452628] [2020-09-25 05:43:51,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 05:43:51,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:51,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 05:43:51,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 05:43:51,895 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2020-09-25 05:43:51,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:51,919 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-09-25 05:43:51,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 05:43:51,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-09-25 05:43:51,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:51,922 INFO L225 Difference]: With dead ends: 24 [2020-09-25 05:43:51,922 INFO L226 Difference]: Without dead ends: 19 [2020-09-25 05:43:51,923 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 [2020-09-25 05:43:51,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-25 05:43:51,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-09-25 05:43:51,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-25 05:43:51,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-09-25 05:43:51,929 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2020-09-25 05:43:51,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:51,930 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-09-25 05:43:51,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 05:43:51,930 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-09-25 05:43:51,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 05:43:51,931 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:51,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:51,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 05:43:51,932 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:51,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:51,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1748013841, now seen corresponding path program 1 times [2020-09-25 05:43:51,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:51,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319456631] [2020-09-25 05:43:51,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:51,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:51,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:52,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:52,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 05:43:52,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:43:52,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-09-25 05:43:52,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:52,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:52,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 05:43:52,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 05:43:52,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 05:43:52,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:52,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:52,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:52,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:52,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:43:52,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:52,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 05:43:52,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:52,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:52,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:52,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:52,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:52,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:52,557 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 05:43:52,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319456631] [2020-09-25 05:43:52,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:43:52,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 05:43:52,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13922401] [2020-09-25 05:43:52,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 05:43:52,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:52,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 05:43:52,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 05:43:52,562 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-09-25 05:43:52,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:52,617 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-09-25 05:43:52,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 05:43:52,619 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-09-25 05:43:52,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:52,620 INFO L225 Difference]: With dead ends: 31 [2020-09-25 05:43:52,620 INFO L226 Difference]: Without dead ends: 26 [2020-09-25 05:43:52,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 05:43:52,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-25 05:43:52,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2020-09-25 05:43:52,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 05:43:52,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-25 05:43:52,633 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-09-25 05:43:52,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:52,633 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-25 05:43:52,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 05:43:52,633 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-25 05:43:52,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-25 05:43:52,635 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:52,635 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:52,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 05:43:52,636 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:52,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:52,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1960900159, now seen corresponding path program 2 times [2020-09-25 05:43:52,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:52,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338296314] [2020-09-25 05:43:52,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:52,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:52,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:53,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:53,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 05:43:53,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:43:53,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 557 [2020-09-25 05:43:53,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:53,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:53,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 05:43:53,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 05:43:53,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 05:43:53,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:53,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:53,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:53,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:53,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:43:53,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:53,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 05:43:53,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:53,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:53,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:53,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:53,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:53,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:43:53,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338296314] [2020-09-25 05:43:53,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:43:53,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 05:43:53,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609793271] [2020-09-25 05:43:53,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 05:43:53,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:53,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 05:43:53,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-25 05:43:53,330 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 7 states. [2020-09-25 05:43:53,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:53,410 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-09-25 05:43:53,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 05:43:53,411 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-09-25 05:43:53,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:53,412 INFO L225 Difference]: With dead ends: 36 [2020-09-25 05:43:53,412 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 05:43:53,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 05:43:53,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 05:43:53,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-09-25 05:43:53,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 05:43:53,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-25 05:43:53,419 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-09-25 05:43:53,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:53,420 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-25 05:43:53,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 05:43:53,420 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-25 05:43:53,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 05:43:53,421 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:53,421 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:53,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 05:43:53,422 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:53,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:53,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1793113839, now seen corresponding path program 3 times [2020-09-25 05:43:53,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:53,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629486407] [2020-09-25 05:43:53,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:53,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:53,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:53,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:54,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:54,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 05:43:54,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:43:54,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 829 [2020-09-25 05:43:54,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:54,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:54,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 05:43:54,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 05:43:54,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 05:43:54,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:54,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:54,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:54,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:54,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:43:54,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:54,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 05:43:54,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:54,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:54,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:54,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:54,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:54,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:43:54,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629486407] [2020-09-25 05:43:54,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:43:54,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 05:43:54,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087843478] [2020-09-25 05:43:54,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 05:43:54,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:54,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 05:43:54,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-25 05:43:54,401 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2020-09-25 05:43:54,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:54,470 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-09-25 05:43:54,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 05:43:54,471 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-09-25 05:43:54,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:54,472 INFO L225 Difference]: With dead ends: 41 [2020-09-25 05:43:54,472 INFO L226 Difference]: Without dead ends: 36 [2020-09-25 05:43:54,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-25 05:43:54,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-25 05:43:54,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2020-09-25 05:43:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 05:43:54,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-25 05:43:54,480 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-09-25 05:43:54,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:54,480 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-25 05:43:54,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 05:43:54,480 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-25 05:43:54,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 05:43:54,481 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:54,482 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:54,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 05:43:54,482 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:54,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:54,483 INFO L82 PathProgramCache]: Analyzing trace with hash -774708161, now seen corresponding path program 4 times [2020-09-25 05:43:54,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:54,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116016866] [2020-09-25 05:43:54,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:54,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:54,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:55,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:55,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 05:43:55,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:43:55,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 892 [2020-09-25 05:43:55,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:55,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:55,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 05:43:55,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 05:43:55,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 05:43:55,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:55,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:55,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:55,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:55,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:43:55,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:55,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 05:43:55,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:55,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:55,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:55,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:55,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:55,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 05:43:55,536 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:43:55,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116016866] [2020-09-25 05:43:55,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:43:55,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 05:43:55,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210754665] [2020-09-25 05:43:55,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 05:43:55,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:55,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 05:43:55,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-25 05:43:55,545 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 9 states. [2020-09-25 05:43:55,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:55,623 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-09-25 05:43:55,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 05:43:55,624 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-09-25 05:43:55,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:55,626 INFO L225 Difference]: With dead ends: 46 [2020-09-25 05:43:55,626 INFO L226 Difference]: Without dead ends: 41 [2020-09-25 05:43:55,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-09-25 05:43:55,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-25 05:43:55,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-09-25 05:43:55,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-25 05:43:55,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-25 05:43:55,639 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-09-25 05:43:55,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:55,640 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-25 05:43:55,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 05:43:55,640 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-25 05:43:55,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 05:43:55,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:55,642 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:55,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 05:43:55,643 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:55,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:55,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1644982033, now seen corresponding path program 5 times [2020-09-25 05:43:55,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:55,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29734030] [2020-09-25 05:43:55,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:55,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:55,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:56,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:56,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-25 05:43:56,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:43:56,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1183 [2020-09-25 05:43:56,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:56,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:56,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 05:43:56,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 05:43:56,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 05:43:56,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:57,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:57,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:57,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:57,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:57,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:43:57,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:57,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 05:43:57,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:57,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:57,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:57,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:57,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:57,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:43:57,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29734030] [2020-09-25 05:43:57,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:43:57,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 05:43:57,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545614300] [2020-09-25 05:43:57,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 05:43:57,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:57,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 05:43:57,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-25 05:43:57,017 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 10 states. [2020-09-25 05:43:57,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:57,102 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-09-25 05:43:57,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 05:43:57,104 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-09-25 05:43:57,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:57,106 INFO L225 Difference]: With dead ends: 51 [2020-09-25 05:43:57,106 INFO L226 Difference]: Without dead ends: 46 [2020-09-25 05:43:57,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-25 05:43:57,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-25 05:43:57,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-09-25 05:43:57,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 05:43:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-25 05:43:57,118 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-09-25 05:43:57,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:57,120 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-25 05:43:57,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 05:43:57,120 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-25 05:43:57,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 05:43:57,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:57,123 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:57,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 05:43:57,123 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:57,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:57,125 INFO L82 PathProgramCache]: Analyzing trace with hash 330519103, now seen corresponding path program 6 times [2020-09-25 05:43:57,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:57,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994938336] [2020-09-25 05:43:57,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 05:43:57,142 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 05:43:57,142 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 05:43:57,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 05:43:57,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 05:43:57 BoogieIcfgContainer [2020-09-25 05:43:57,168 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 05:43:57,172 INFO L168 Benchmark]: Toolchain (without parser) took 6804.84 ms. Allocated memory was 138.9 MB in the beginning and 277.9 MB in the end (delta: 138.9 MB). Free memory was 102.2 MB in the beginning and 175.6 MB in the end (delta: -73.4 MB). Peak memory consumption was 65.5 MB. Max. memory is 7.1 GB. [2020-09-25 05:43:57,173 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-25 05:43:57,174 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.85 ms. Allocated memory is still 138.9 MB. Free memory was 101.5 MB in the beginning and 91.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-25 05:43:57,174 INFO L168 Benchmark]: Boogie Preprocessor took 112.11 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 91.8 MB in the beginning and 180.5 MB in the end (delta: -88.6 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-25 05:43:57,175 INFO L168 Benchmark]: RCFGBuilder took 302.42 ms. Allocated memory is still 201.3 MB. Free memory was 180.5 MB in the beginning and 169.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-09-25 05:43:57,176 INFO L168 Benchmark]: TraceAbstraction took 6096.42 ms. Allocated memory was 201.3 MB in the beginning and 277.9 MB in the end (delta: 76.5 MB). Free memory was 168.5 MB in the beginning and 175.6 MB in the end (delta: -7.1 MB). Peak memory consumption was 69.4 MB. Max. memory is 7.1 GB. [2020-09-25 05:43:57,180 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 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 280.85 ms. Allocated memory is still 138.9 MB. Free memory was 101.5 MB in the beginning and 91.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.11 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 91.8 MB in the beginning and 180.5 MB in the end (delta: -88.6 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 302.42 ms. Allocated memory is still 201.3 MB. Free memory was 180.5 MB in the beginning and 169.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6096.42 ms. Allocated memory was 201.3 MB in the beginning and 277.9 MB in the end (delta: 76.5 MB). Free memory was 168.5 MB in the beginning and 175.6 MB in the end (delta: -7.1 MB). Peak memory consumption was 69.4 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, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.9s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 146 SDtfs, 87 SDslu, 552 SDs, 0 SdLazy, 152 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=7, 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, 7 MinimizatonAttempts, 22 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 193 NumberOfCodeBlocks, 193 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 145 ConstructedInterpolants, 0 QuantifiedInterpolants, 19585 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 0/115 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...