/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_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 05:43:48,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 05:43:48,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 05:43:48,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 05:43:48,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 05:43:48,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 05:43:48,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 05:43:48,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 05:43:48,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 05:43:48,854 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 05:43:48,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 05:43:48,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 05:43:48,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 05:43:48,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 05:43:48,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 05:43:48,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 05:43:48,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 05:43:48,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 05:43:48,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 05:43:48,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 05:43:48,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 05:43:48,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 05:43:48,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 05:43:48,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 05:43:48,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 05:43:48,895 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 05:43:48,895 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 05:43:48,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 05:43:48,902 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 05:43:48,903 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 05:43:48,904 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 05:43:48,908 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 05:43:48,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 05:43:48,912 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 05:43:48,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 05:43:48,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 05:43:48,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 05:43:48,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 05:43:48,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 05:43:48,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 05:43:48,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 05:43:48,919 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 05:43:48,965 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 05:43:48,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 05:43:48,967 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 05:43:48,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 05:43:48,967 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 05:43:48,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 05:43:48,967 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 05:43:48,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 05:43:48,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 05:43:48,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 05:43:48,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 05:43:48,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 05:43:48,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 05:43:48,969 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 05:43:48,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 05:43:48,969 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 05:43:48,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 05:43:48,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 05:43:48,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 05:43:48,970 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 05:43:48,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 05:43:48,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:43:48,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 05:43:48,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 05:43:48,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 05:43:48,972 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 05:43:48,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 05:43:48,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 05:43:48,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 05:43:48,972 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 05:43:49,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 05:43:49,479 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 05:43:49,484 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 05:43:49,486 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 05:43:49,487 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 05:43:49,488 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2020-09-25 05:43:49,583 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/629e23f00/57fc556ac4414487a0790deeb344302a/FLAGd6ebc696a [2020-09-25 05:43:50,126 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 05:43:50,127 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2020-09-25 05:43:50,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/629e23f00/57fc556ac4414487a0790deeb344302a/FLAGd6ebc696a [2020-09-25 05:43:50,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/629e23f00/57fc556ac4414487a0790deeb344302a [2020-09-25 05:43:50,476 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 05:43:50,483 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 05:43:50,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 05:43:50,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 05:43:50,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 05:43:50,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:43:50" (1/1) ... [2020-09-25 05:43:50,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@419c06a6 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 05:43:50,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:43:50" (1/1) ... [2020-09-25 05:43:50,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 05:43:50,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 05:43:50,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:43:50,762 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 05:43:50,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:43:50,802 INFO L208 MainTranslator]: Completed translation [2020-09-25 05:43:50,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:50 WrapperNode [2020-09-25 05:43:50,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 05:43:50,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 05:43:50,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 05:43:50,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 05:43:50,819 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 05:43:50,819 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 05:43:50,826 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 05:43:50,826 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 05:43:50,831 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 05:43:50,837 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 05:43:50,838 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 05:43:50,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 05:43:50,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 05:43:50,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 05:43:50,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 05:43:50,921 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 05:43:51,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 05:43:51,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 05:43:51,006 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 05:43:51,006 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 05:43:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 05:43:51,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 05:43:51,007 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 05:43:51,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 05:43:51,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 05:43:51,198 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 05:43:51,198 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 05:43:51,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:43:51 BoogieIcfgContainer [2020-09-25 05:43:51,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 05:43:51,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 05:43:51,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 05:43:51,209 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 05:43:51,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 05:43:50" (1/3) ... [2020-09-25 05:43:51,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f0d7fe 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 05:43:51,211 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 05:43:51,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f0d7fe 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 05:43:51,212 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 05:43:51,214 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2020-09-25 05:43:51,228 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 05:43:51,238 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 05:43:51,264 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 05:43:51,304 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 05:43:51,305 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 05:43:51,305 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 05:43:51,305 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 05:43:51,306 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 05:43:51,306 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 05:43:51,306 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 05:43:51,306 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 05:43:51,334 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-09-25 05:43:51,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-25 05:43:51,342 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:51,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:51,344 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:51,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:51,353 INFO L82 PathProgramCache]: Analyzing trace with hash 493765703, now seen corresponding path program 1 times [2020-09-25 05:43:51,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:51,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731491022] [2020-09-25 05:43:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:51,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:51,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:51,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:51,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:51,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 05:43:51,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:43:51,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-09-25 05:43:51,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:51,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:51,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:51,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 05:43:51,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:51,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 05:43:51,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:51,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:51,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:51,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:43:51,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:51,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 05:43:51,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:51,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:51,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:51,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:51,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:51,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:51,675 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 05:43:51,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731491022] [2020-09-25 05:43:51,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:43:51,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 05:43:51,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273430174] [2020-09-25 05:43:51,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 05:43:51,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:51,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 05:43:51,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 05:43:51,719 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-09-25 05:43:51,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:51,751 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-09-25 05:43:51,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 05:43:51,753 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-25 05:43:51,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:51,764 INFO L225 Difference]: With dead ends: 33 [2020-09-25 05:43:51,765 INFO L226 Difference]: Without dead ends: 16 [2020-09-25 05:43:51,769 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 05:43:51,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-25 05:43:51,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-09-25 05:43:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-25 05:43:51,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-09-25 05:43:51,817 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2020-09-25 05:43:51,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:51,817 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-09-25 05:43:51,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 05:43:51,818 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-09-25 05:43:51,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-25 05:43:51,819 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:51,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:51,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 05:43:51,819 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:51,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:51,820 INFO L82 PathProgramCache]: Analyzing trace with hash 486377535, now seen corresponding path program 1 times [2020-09-25 05:43:51,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:51,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262299537] [2020-09-25 05:43:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:51,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:51,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:51,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:51,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 05:43:51,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:43:51,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-09-25 05:43:51,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:51,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:51,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:43:51,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 05:43:51,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-25 05:43:51,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:51,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:52,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:52,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:52,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:43:52,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:52,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 05:43:52,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:52,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:52,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:52,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:52,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:52,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:52,009 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 05:43:52,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262299537] [2020-09-25 05:43:52,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:43:52,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 05:43:52,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87009961] [2020-09-25 05:43:52,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 05:43:52,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:52,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 05:43:52,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 05:43:52,014 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2020-09-25 05:43:52,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:52,038 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-09-25 05:43:52,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 05:43:52,039 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-09-25 05:43:52,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:52,040 INFO L225 Difference]: With dead ends: 24 [2020-09-25 05:43:52,040 INFO L226 Difference]: Without dead ends: 19 [2020-09-25 05:43:52,041 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 05:43:52,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-25 05:43:52,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-09-25 05:43:52,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-25 05:43:52,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-09-25 05:43:52,047 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2020-09-25 05:43:52,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:52,048 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-09-25 05:43:52,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 05:43:52,048 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-09-25 05:43:52,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 05:43:52,049 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:52,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:52,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 05:43:52,050 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:52,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:52,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1748013841, now seen corresponding path program 1 times [2020-09-25 05:43:52,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:52,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41286764] [2020-09-25 05:43:52,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:52,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:52,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:52,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:52,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 05:43:52,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:43:52,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-09-25 05:43:52,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:52,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:52,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:43:52,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 05:43:52,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 05:43:52,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 05:43:52,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:52,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:52,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:52,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:43:52,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:52,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 05:43:52,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:52,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:52,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:52,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:52,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:52,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:52,363 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 05:43:52,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41286764] [2020-09-25 05:43:52,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:43:52,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 05:43:52,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487756153] [2020-09-25 05:43:52,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:43:52,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:52,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:43:52,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:43:52,369 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2020-09-25 05:43:52,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:52,443 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-09-25 05:43:52,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 05:43:52,443 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-25 05:43:52,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:52,445 INFO L225 Difference]: With dead ends: 29 [2020-09-25 05:43:52,445 INFO L226 Difference]: Without dead ends: 24 [2020-09-25 05:43:52,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-25 05:43:52,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-25 05:43:52,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-09-25 05:43:52,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 05:43:52,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-25 05:43:52,452 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-09-25 05:43:52,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:52,453 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-25 05:43:52,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:43:52,453 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-25 05:43:52,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-25 05:43:52,454 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:52,454 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:52,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 05:43:52,455 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:52,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:52,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1960900159, now seen corresponding path program 2 times [2020-09-25 05:43:52,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:52,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875660023] [2020-09-25 05:43:52,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:52,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:52,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:52,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:52,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 05:43:52,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:43:52,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-09-25 05:43:52,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:52,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:52,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 05:43:52,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 05:43:52,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 05:43:52,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:52,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:52,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:52,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:52,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:43:52,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:52,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 05:43:52,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:52,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:52,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:52,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:52,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:52,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:52,965 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 05:43:52,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875660023] [2020-09-25 05:43:52,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:43:52,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 05:43:52,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592223666] [2020-09-25 05:43:52,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 05:43:52,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:52,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 05:43:52,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-25 05:43:52,973 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 9 states. [2020-09-25 05:43:53,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:53,140 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-09-25 05:43:53,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 05:43:53,142 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-09-25 05:43:53,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:53,146 INFO L225 Difference]: With dead ends: 34 [2020-09-25 05:43:53,146 INFO L226 Difference]: Without dead ends: 29 [2020-09-25 05:43:53,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-25 05:43:53,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-25 05:43:53,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-09-25 05:43:53,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 05:43:53,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-25 05:43:53,160 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-09-25 05:43:53,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:53,160 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-25 05:43:53,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 05:43:53,161 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-25 05:43:53,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 05:43:53,162 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:53,163 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:53,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 05:43:53,163 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:53,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:53,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1793113839, now seen corresponding path program 3 times [2020-09-25 05:43:53,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:53,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566664697] [2020-09-25 05:43:53,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:53,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:53,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:53,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:53,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 05:43:53,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:43:53,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 426 [2020-09-25 05:43:53,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:53,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:53,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 05:43:53,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 05:43:53,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 05:43:53,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 05:43:53,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:53,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:53,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:53,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:43:53,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:53,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 05:43:53,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:53,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:53,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:53,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:53,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:53,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:53,782 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 05:43:53,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566664697] [2020-09-25 05:43:53,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:43:53,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 05:43:53,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596873380] [2020-09-25 05:43:53,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 05:43:53,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:53,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 05:43:53,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-25 05:43:53,784 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-09-25 05:43:53,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:53,998 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-09-25 05:43:53,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 05:43:53,999 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-09-25 05:43:53,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:54,000 INFO L225 Difference]: With dead ends: 39 [2020-09-25 05:43:54,000 INFO L226 Difference]: Without dead ends: 34 [2020-09-25 05:43:54,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-09-25 05:43:54,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-25 05:43:54,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-25 05:43:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 05:43:54,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-25 05:43:54,008 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-09-25 05:43:54,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:54,008 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-25 05:43:54,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 05:43:54,009 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-25 05:43:54,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 05:43:54,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:54,010 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:54,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 05:43:54,011 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:54,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:54,011 INFO L82 PathProgramCache]: Analyzing trace with hash -774708161, now seen corresponding path program 4 times [2020-09-25 05:43:54,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:54,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940068421] [2020-09-25 05:43:54,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:54,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:54,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:54,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:54,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 05:43:54,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:43:54,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-09-25 05:43:54,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:54,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:54,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 05:43:54,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 05:43:54,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 05:43:54,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 05:43:54,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:54,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:54,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:54,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:43:54,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:54,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 05:43:54,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:54,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:54,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:54,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:54,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:54,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:54,611 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 05:43:54,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940068421] [2020-09-25 05:43:54,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:43:54,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 05:43:54,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070451532] [2020-09-25 05:43:54,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 05:43:54,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:54,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 05:43:54,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-09-25 05:43:54,614 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 13 states. [2020-09-25 05:43:54,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:54,903 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-09-25 05:43:54,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 05:43:54,904 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-09-25 05:43:54,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:54,907 INFO L225 Difference]: With dead ends: 44 [2020-09-25 05:43:54,907 INFO L226 Difference]: Without dead ends: 39 [2020-09-25 05:43:54,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-09-25 05:43:54,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-25 05:43:54,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-09-25 05:43:54,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-25 05:43:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-25 05:43:54,920 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-09-25 05:43:54,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:54,921 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-25 05:43:54,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 05:43:54,921 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-25 05:43:54,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 05:43:54,923 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:54,923 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:54,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 05:43:54,924 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:54,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:54,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1644982033, now seen corresponding path program 5 times [2020-09-25 05:43:54,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:54,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527507960] [2020-09-25 05:43:54,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:54,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:55,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:55,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:55,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-25 05:43:55,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:43:55,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 516 [2020-09-25 05:43:55,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:55,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:55,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 05:43:55,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 05:43:55,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 05:43:55,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:55,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:55,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:55,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:55,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:43:55,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:55,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 05:43:55,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:55,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:55,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:55,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:55,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:55,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:55,771 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 05:43:55,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527507960] [2020-09-25 05:43:55,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:43:55,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 05:43:55,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751217967] [2020-09-25 05:43:55,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 05:43:55,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:55,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 05:43:55,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-09-25 05:43:55,775 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 15 states. [2020-09-25 05:43:56,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:56,176 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-09-25 05:43:56,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 05:43:56,177 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-09-25 05:43:56,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:56,178 INFO L225 Difference]: With dead ends: 49 [2020-09-25 05:43:56,178 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 05:43:56,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2020-09-25 05:43:56,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 05:43:56,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-25 05:43:56,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 05:43:56,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-25 05:43:56,190 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-09-25 05:43:56,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:56,192 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-25 05:43:56,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 05:43:56,192 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-25 05:43:56,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 05:43:56,194 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:56,194 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:56,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 05:43:56,194 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:56,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:56,195 INFO L82 PathProgramCache]: Analyzing trace with hash 330519103, now seen corresponding path program 6 times [2020-09-25 05:43:56,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:56,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511933826] [2020-09-25 05:43:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 05:43:56,212 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 05:43:56,212 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 05:43:56,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 05:43:56,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 05:43:56 BoogieIcfgContainer [2020-09-25 05:43:56,241 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 05:43:56,246 INFO L168 Benchmark]: Toolchain (without parser) took 5765.46 ms. Allocated memory was 140.5 MB in the beginning and 246.4 MB in the end (delta: 105.9 MB). Free memory was 103.0 MB in the beginning and 125.3 MB in the end (delta: -22.3 MB). Peak memory consumption was 83.6 MB. Max. memory is 7.1 GB. [2020-09-25 05:43:56,251 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.4 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. [2020-09-25 05:43:56,252 INFO L168 Benchmark]: CACSL2BoogieTranslator took 319.50 ms. Allocated memory is still 140.5 MB. Free memory was 102.1 MB in the beginning and 92.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-25 05:43:56,254 INFO L168 Benchmark]: Boogie Preprocessor took 112.60 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 92.6 MB in the beginning and 183.7 MB in the end (delta: -91.1 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-09-25 05:43:56,254 INFO L168 Benchmark]: RCFGBuilder took 286.78 ms. Allocated memory is still 203.9 MB. Free memory was 183.7 MB in the beginning and 171.5 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-09-25 05:43:56,257 INFO L168 Benchmark]: TraceAbstraction took 5036.53 ms. Allocated memory was 203.9 MB in the beginning and 246.4 MB in the end (delta: 42.5 MB). Free memory was 171.5 MB in the beginning and 125.3 MB in the end (delta: 46.2 MB). Peak memory consumption was 88.7 MB. Max. memory is 7.1 GB. [2020-09-25 05:43:56,270 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.4 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 319.50 ms. Allocated memory is still 140.5 MB. Free memory was 102.1 MB in the beginning and 92.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.60 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 92.6 MB in the beginning and 183.7 MB in the end (delta: -91.1 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 286.78 ms. Allocated memory is still 203.9 MB. Free memory was 183.7 MB in the beginning and 171.5 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5036.53 ms. Allocated memory was 203.9 MB in the beginning and 246.4 MB in the end (delta: 42.5 MB). Free memory was 171.5 MB in the beginning and 125.3 MB in the end (delta: 46.2 MB). Peak memory consumption was 88.7 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(x != 6) [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: 4.9s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 117 SDtfs, 52 SDslu, 553 SDs, 0 SdLazy, 510 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 102 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.2s 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, 12 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 193 NumberOfCodeBlocks, 193 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 145 ConstructedInterpolants, 0 QuantifiedInterpolants, 21095 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...