/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:10:43,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:10:43,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:10:43,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:10:43,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:10:43,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:10:43,364 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:10:43,366 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:10:43,368 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:10:43,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:10:43,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:10:43,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:10:43,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:10:43,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:10:43,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:10:43,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:10:43,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:10:43,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:10:43,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:10:43,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:10:43,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:10:43,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:10:43,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:10:43,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:10:43,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:10:43,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:10:43,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:10:43,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:10:43,391 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:10:43,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:10:43,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:10:43,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:10:43,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:10:43,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:10:43,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:10:43,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:10:43,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:10:43,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:10:43,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:10:43,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:10:43,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:10:43,401 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 09:10:43,431 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:10:43,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:10:43,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:10:43,437 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:10:43,437 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:10:43,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:10:43,437 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:10:43,438 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:10:43,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:10:43,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:10:43,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:10:43,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:10:43,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:10:43,442 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:10:43,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:10:43,442 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:10:43,443 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:10:43,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:10:43,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:10:43,443 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:10:43,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:10:43,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:10:43,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:10:43,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:10:43,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:10:43,448 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:10:43,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:10:43,448 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:10:43,448 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:10:43,449 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-09-25 09:10:43,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:10:43,997 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:10:44,002 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:10:44,004 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:10:44,005 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:10:44,006 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-09-25 09:10:44,103 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0f6c7aa2/d98158b617c848749235d6267be8d6b5/FLAG55026e109 [2020-09-25 09:10:44,654 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:10:44,655 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-09-25 09:10:44,663 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0f6c7aa2/d98158b617c848749235d6267be8d6b5/FLAG55026e109 [2020-09-25 09:10:45,003 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0f6c7aa2/d98158b617c848749235d6267be8d6b5 [2020-09-25 09:10:45,019 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:10:45,027 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:10:45,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:10:45,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:10:45,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:10:45,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:10:45" (1/1) ... [2020-09-25 09:10:45,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62502cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:45, skipping insertion in model container [2020-09-25 09:10:45,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:10:45" (1/1) ... [2020-09-25 09:10:45,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:10:45,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:10:45,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:10:45,310 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:10:45,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:10:45,340 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:10:45,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:45 WrapperNode [2020-09-25 09:10:45,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:10:45,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:10:45,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:10:45,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:10:45,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:45" (1/1) ... [2020-09-25 09:10:45,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:45" (1/1) ... [2020-09-25 09:10:45,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:45" (1/1) ... [2020-09-25 09:10:45,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:45" (1/1) ... [2020-09-25 09:10:45,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:45" (1/1) ... [2020-09-25 09:10:45,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:45" (1/1) ... [2020-09-25 09:10:45,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:45" (1/1) ... [2020-09-25 09:10:45,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:10:45,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:10:45,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:10:45,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:10:45,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:10:45,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:10:45,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:10:45,519 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 09:10:45,519 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:10:45,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:10:45,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 09:10:45,519 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:10:45,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:10:45,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:10:45,729 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:10:45,730 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 09:10:45,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:10:45 BoogieIcfgContainer [2020-09-25 09:10:45,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:10:45,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:10:45,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:10:45,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:10:45,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:10:45" (1/3) ... [2020-09-25 09:10:45,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12303a54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:10:45, skipping insertion in model container [2020-09-25 09:10:45,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:45" (2/3) ... [2020-09-25 09:10:45,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12303a54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:10:45, skipping insertion in model container [2020-09-25 09:10:45,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:10:45" (3/3) ... [2020-09-25 09:10:45,772 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2020-09-25 09:10:45,814 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:10:45,827 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:10:45,869 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:10:45,903 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:10:45,904 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:10:45,904 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:10:45,904 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:10:45,904 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:10:45,904 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:10:45,905 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:10:45,905 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:10:45,924 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-09-25 09:10:45,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-25 09:10:45,934 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:45,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:45,935 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:45,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:45,942 INFO L82 PathProgramCache]: Analyzing trace with hash 493765703, now seen corresponding path program 1 times [2020-09-25 09:10:45,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:45,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433768096] [2020-09-25 09:10:45,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:46,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:46,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:46,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:46,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 09:10:46,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:10:46,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-09-25 09:10:46,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:46,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:46,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:46,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:10:46,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:46,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 09:10:46,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:46,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:46,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:46,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:46,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:46,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 09:10:46,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:46,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:46,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:46,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:46,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:46,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:46,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433768096] [2020-09-25 09:10:46,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:10:46,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 09:10:46,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652737651] [2020-09-25 09:10:46,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 09:10:46,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:46,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 09:10:46,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 09:10:46,244 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-09-25 09:10:46,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:46,269 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-09-25 09:10:46,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 09:10:46,270 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-25 09:10:46,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:46,282 INFO L225 Difference]: With dead ends: 33 [2020-09-25 09:10:46,282 INFO L226 Difference]: Without dead ends: 16 [2020-09-25 09:10:46,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 09:10:46,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-25 09:10:46,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-09-25 09:10:46,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-25 09:10:46,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-09-25 09:10:46,338 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2020-09-25 09:10:46,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:46,339 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-09-25 09:10:46,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 09:10:46,339 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-09-25 09:10:46,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-25 09:10:46,340 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:46,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:46,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:10:46,341 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:46,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:46,342 INFO L82 PathProgramCache]: Analyzing trace with hash 486377535, now seen corresponding path program 1 times [2020-09-25 09:10:46,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:46,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190774037] [2020-09-25 09:10:46,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:46,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:46,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:46,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:46,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 09:10:46,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:10:46,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-09-25 09:10:46,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:46,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:46,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:10:46,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 09:10:46,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 09:10:46,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:46,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:46,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:46,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:46,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:46,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:46,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 09:10:46,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:46,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:46,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:46,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:46,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:46,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:46,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190774037] [2020-09-25 09:10:46,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:10:46,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 09:10:46,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048690823] [2020-09-25 09:10:46,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:10:46,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:46,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:10:46,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:10:46,660 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2020-09-25 09:10:46,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:46,703 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-09-25 09:10:46,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:10:46,704 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-09-25 09:10:46,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:46,705 INFO L225 Difference]: With dead ends: 26 [2020-09-25 09:10:46,705 INFO L226 Difference]: Without dead ends: 21 [2020-09-25 09:10:46,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:10:46,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-25 09:10:46,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2020-09-25 09:10:46,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-25 09:10:46,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-09-25 09:10:46,713 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2020-09-25 09:10:46,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:46,714 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-09-25 09:10:46,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:10:46,714 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-09-25 09:10:46,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 09:10:46,715 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:46,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:46,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:10:46,716 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:46,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:46,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1748013841, now seen corresponding path program 1 times [2020-09-25 09:10:46,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:46,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783799795] [2020-09-25 09:10:46,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:46,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:46,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:47,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:47,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:10:47,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:10:47,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 383 [2020-09-25 09:10:47,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:47,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:47,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 09:10:47,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 09:10:47,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 09:10:47,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:47,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:47,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:47,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:47,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:47,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:47,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 09:10:47,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:47,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:47,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:47,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:47,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:47,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:47,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783799795] [2020-09-25 09:10:47,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:47,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 09:10:47,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293633766] [2020-09-25 09:10:47,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 09:10:47,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:47,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 09:10:47,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:10:47,230 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-09-25 09:10:47,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:47,296 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-09-25 09:10:47,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 09:10:47,298 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-09-25 09:10:47,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:47,299 INFO L225 Difference]: With dead ends: 31 [2020-09-25 09:10:47,299 INFO L226 Difference]: Without dead ends: 26 [2020-09-25 09:10:47,300 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 09:10:47,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-25 09:10:47,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2020-09-25 09:10:47,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 09:10:47,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-25 09:10:47,311 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-09-25 09:10:47,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:47,312 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-25 09:10:47,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 09:10:47,312 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-25 09:10:47,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-25 09:10:47,314 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:47,314 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:47,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 09:10:47,317 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:47,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:47,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1960900159, now seen corresponding path program 2 times [2020-09-25 09:10:47,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:47,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957009953] [2020-09-25 09:10:47,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:47,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:47,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:47,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:47,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 09:10:48,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:10:48,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 653 [2020-09-25 09:10:48,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:48,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:48,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:10:48,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 09:10:48,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 09:10:48,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:48,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:48,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:48,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:48,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:48,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:48,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:10:48,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:48,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:48,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:48,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:48,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:48,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:48,113 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 09:10:48,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957009953] [2020-09-25 09:10:48,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:48,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 09:10:48,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741669974] [2020-09-25 09:10:48,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:10:48,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:48,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:10:48,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:10:48,116 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 7 states. [2020-09-25 09:10:48,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:48,160 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-09-25 09:10:48,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 09:10:48,161 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-09-25 09:10:48,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:48,162 INFO L225 Difference]: With dead ends: 36 [2020-09-25 09:10:48,162 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 09:10:48,163 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 09:10:48,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 09:10:48,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-09-25 09:10:48,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 09:10:48,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-25 09:10:48,169 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-09-25 09:10:48,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:48,170 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-25 09:10:48,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:10:48,170 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-25 09:10:48,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 09:10:48,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:48,171 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:48,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 09:10:48,172 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:48,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:48,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1793113839, now seen corresponding path program 3 times [2020-09-25 09:10:48,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:48,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36713045] [2020-09-25 09:10:48,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:48,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:48,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:48,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:48,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 09:10:48,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:10:48,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 786 [2020-09-25 09:10:48,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:48,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:48,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 09:10:48,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 09:10:48,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 09:10:48,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:49,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:49,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:49,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:49,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:49,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:49,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:10:49,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:49,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:49,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:49,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:49,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:49,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:49,093 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 09:10:49,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36713045] [2020-09-25 09:10:49,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:49,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 09:10:49,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827033966] [2020-09-25 09:10:49,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 09:10:49,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:49,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 09:10:49,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-25 09:10:49,096 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2020-09-25 09:10:49,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:49,150 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-09-25 09:10:49,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 09:10:49,151 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-09-25 09:10:49,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:49,152 INFO L225 Difference]: With dead ends: 41 [2020-09-25 09:10:49,152 INFO L226 Difference]: Without dead ends: 36 [2020-09-25 09:10:49,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:10:49,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-25 09:10:49,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2020-09-25 09:10:49,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 09:10:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-25 09:10:49,160 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-09-25 09:10:49,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:49,161 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-25 09:10:49,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 09:10:49,161 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-25 09:10:49,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 09:10:49,162 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:49,162 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:49,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 09:10:49,163 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:49,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:49,163 INFO L82 PathProgramCache]: Analyzing trace with hash -774708161, now seen corresponding path program 4 times [2020-09-25 09:10:49,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:49,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881454461] [2020-09-25 09:10:49,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:49,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:49,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:49,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:49,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 09:10:49,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:10:49,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 777 [2020-09-25 09:10:49,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:49,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:49,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:10:49,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 09:10:49,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 09:10:49,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:50,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:50,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:50,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:50,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:50,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:50,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:10:50,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:50,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:50,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:50,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:50,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:50,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:50,088 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 09:10:50,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881454461] [2020-09-25 09:10:50,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:50,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 09:10:50,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121162637] [2020-09-25 09:10:50,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 09:10:50,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:50,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 09:10:50,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:10:50,091 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 9 states. [2020-09-25 09:10:50,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:50,196 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-09-25 09:10:50,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 09:10:50,197 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-09-25 09:10:50,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:50,199 INFO L225 Difference]: With dead ends: 46 [2020-09-25 09:10:50,199 INFO L226 Difference]: Without dead ends: 41 [2020-09-25 09:10:50,200 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 09:10:50,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-25 09:10:50,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-09-25 09:10:50,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-25 09:10:50,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-25 09:10:50,219 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-09-25 09:10:50,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:50,220 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-25 09:10:50,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 09:10:50,221 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-25 09:10:50,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 09:10:50,222 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:50,222 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:50,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 09:10:50,223 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:50,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:50,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1644982033, now seen corresponding path program 5 times [2020-09-25 09:10:50,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:50,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447032599] [2020-09-25 09:10:50,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:50,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:50,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:51,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:51,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-25 09:10:51,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:10:51,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1202 [2020-09-25 09:10:51,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:51,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:51,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 09:10:51,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 09:10:51,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 09:10:51,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:51,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:51,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:51,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:51,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:51,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:51,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:10:51,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:51,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:51,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:51,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:51,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:51,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:51,621 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 09:10:51,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447032599] [2020-09-25 09:10:51,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:51,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 09:10:51,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413450147] [2020-09-25 09:10:51,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 09:10:51,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:51,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 09:10:51,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-25 09:10:51,626 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 10 states. [2020-09-25 09:10:51,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:51,713 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-09-25 09:10:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 09:10:51,715 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-09-25 09:10:51,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:51,717 INFO L225 Difference]: With dead ends: 51 [2020-09-25 09:10:51,717 INFO L226 Difference]: Without dead ends: 46 [2020-09-25 09:10:51,718 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 09:10:51,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-25 09:10:51,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-09-25 09:10:51,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 09:10:51,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-25 09:10:51,730 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-09-25 09:10:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:51,730 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-25 09:10:51,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 09:10:51,731 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-25 09:10:51,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 09:10:51,733 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:51,733 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:51,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 09:10:51,734 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:51,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:51,734 INFO L82 PathProgramCache]: Analyzing trace with hash 330519103, now seen corresponding path program 6 times [2020-09-25 09:10:51,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:51,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775197699] [2020-09-25 09:10:51,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 09:10:51,757 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 09:10:51,757 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 09:10:51,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 09:10:51,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 09:10:51 BoogieIcfgContainer [2020-09-25 09:10:51,786 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 09:10:51,792 INFO L168 Benchmark]: Toolchain (without parser) took 6767.35 ms. Allocated memory was 136.8 MB in the beginning and 291.5 MB in the end (delta: 154.7 MB). Free memory was 100.9 MB in the beginning and 217.6 MB in the end (delta: -116.7 MB). Peak memory consumption was 38.0 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:51,797 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 09:10:51,798 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.62 ms. Allocated memory is still 136.8 MB. Free memory was 100.3 MB in the beginning and 90.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:51,800 INFO L168 Benchmark]: Boogie Preprocessor took 106.82 ms. Allocated memory was 136.8 MB in the beginning and 199.2 MB in the end (delta: 62.4 MB). Free memory was 90.9 MB in the beginning and 179.2 MB in the end (delta: -88.2 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:51,801 INFO L168 Benchmark]: RCFGBuilder took 295.53 ms. Allocated memory is still 199.2 MB. Free memory was 179.2 MB in the beginning and 166.5 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:51,802 INFO L168 Benchmark]: TraceAbstraction took 6040.84 ms. Allocated memory was 199.2 MB in the beginning and 291.5 MB in the end (delta: 92.3 MB). Free memory was 166.5 MB in the beginning and 217.6 MB in the end (delta: -51.1 MB). Peak memory consumption was 41.2 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:51,815 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 312.62 ms. Allocated memory is still 136.8 MB. Free memory was 100.3 MB in the beginning and 90.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.82 ms. Allocated memory was 136.8 MB in the beginning and 199.2 MB in the end (delta: 62.4 MB). Free memory was 90.9 MB in the beginning and 179.2 MB in the end (delta: -88.2 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 295.53 ms. Allocated memory is still 199.2 MB. Free memory was 179.2 MB in the beginning and 166.5 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6040.84 ms. Allocated memory was 199.2 MB in the beginning and 291.5 MB in the end (delta: 92.3 MB). Free memory was 166.5 MB in the beginning and 217.6 MB in the end (delta: -51.1 MB). Peak memory consumption was 41.2 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: 5.8s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 146 SDtfs, 90 SDslu, 613 SDs, 0 SdLazy, 160 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s 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, 24 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 193 NumberOfCodeBlocks, 193 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 145 ConstructedInterpolants, 0 QuantifiedInterpolants, 19725 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...