/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=WIDEST --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/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 03:26:59,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 03:26:59,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 03:26:59,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 03:26:59,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 03:26:59,359 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 03:26:59,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 03:26:59,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 03:26:59,368 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 03:26:59,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 03:26:59,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 03:26:59,373 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 03:26:59,373 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 03:26:59,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 03:26:59,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 03:26:59,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 03:26:59,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 03:26:59,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 03:26:59,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 03:26:59,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 03:26:59,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 03:26:59,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 03:26:59,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 03:26:59,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 03:26:59,391 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 03:26:59,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 03:26:59,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 03:26:59,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 03:26:59,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 03:26:59,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 03:26:59,394 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 03:26:59,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 03:26:59,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 03:26:59,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 03:26:59,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 03:26:59,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 03:26:59,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 03:26:59,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 03:26:59,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 03:26:59,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 03:26:59,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 03:26:59,401 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 03:26:59,427 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 03:26:59,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 03:26:59,428 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 03:26:59,428 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 03:26:59,429 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 03:26:59,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 03:26:59,429 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 03:26:59,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 03:26:59,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 03:26:59,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 03:26:59,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 03:26:59,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 03:26:59,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 03:26:59,430 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 03:26:59,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 03:26:59,431 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 03:26:59,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 03:26:59,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 03:26:59,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 03:26:59,432 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 03:26:59,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 03:26:59,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:26:59,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 03:26:59,433 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 03:26:59,433 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 03:26:59,433 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 03:26:59,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 03:26:59,433 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 03:26:59,433 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 03:26:59,434 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=WIDEST;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=WIDEST;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=WIDEST;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=WIDEST;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=WIDEST;log-additional-information=true; [2020-09-25 03:26:59,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 03:26:59,917 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 03:26:59,921 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 03:26:59,923 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 03:26:59,923 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 03:26:59,924 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-09-25 03:27:00,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77625d0bc/2a3c0ac320fc4f3080b5577580e0aec0/FLAGc499eefa9 [2020-09-25 03:27:00,522 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 03:27:00,523 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-09-25 03:27:00,531 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77625d0bc/2a3c0ac320fc4f3080b5577580e0aec0/FLAGc499eefa9 [2020-09-25 03:27:00,883 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77625d0bc/2a3c0ac320fc4f3080b5577580e0aec0 [2020-09-25 03:27:00,897 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 03:27:00,902 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 03:27:00,903 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 03:27:00,903 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 03:27:00,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 03:27:00,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:27:00" (1/1) ... [2020-09-25 03:27:00,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44fd9ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:00, skipping insertion in model container [2020-09-25 03:27:00,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:27:00" (1/1) ... [2020-09-25 03:27:00,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 03:27:00,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 03:27:01,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:27:01,163 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 03:27:01,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:27:01,204 INFO L208 MainTranslator]: Completed translation [2020-09-25 03:27:01,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:01 WrapperNode [2020-09-25 03:27:01,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 03:27:01,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 03:27:01,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 03:27:01,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 03:27:01,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:01" (1/1) ... [2020-09-25 03:27:01,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:01" (1/1) ... [2020-09-25 03:27:01,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:01" (1/1) ... [2020-09-25 03:27:01,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:01" (1/1) ... [2020-09-25 03:27:01,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:01" (1/1) ... [2020-09-25 03:27:01,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:01" (1/1) ... [2020-09-25 03:27:01,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:01" (1/1) ... [2020-09-25 03:27:01,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 03:27:01,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 03:27:01,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 03:27:01,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 03:27:01,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:01" (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 03:27:01,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 03:27:01,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 03:27:01,410 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 03:27:01,410 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 03:27:01,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 03:27:01,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 03:27:01,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 03:27:01,411 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 03:27:01,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 03:27:01,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 03:27:01,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 03:27:01,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 03:27:01,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 03:27:01,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 03:27:01,709 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 03:27:01,710 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 03:27:01,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:27:01 BoogieIcfgContainer [2020-09-25 03:27:01,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 03:27:01,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 03:27:01,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 03:27:01,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 03:27:01,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 03:27:00" (1/3) ... [2020-09-25 03:27:01,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25c6dbdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:27:01, skipping insertion in model container [2020-09-25 03:27:01,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:01" (2/3) ... [2020-09-25 03:27:01,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25c6dbdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:27:01, skipping insertion in model container [2020-09-25 03:27:01,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:27:01" (3/3) ... [2020-09-25 03:27:01,740 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-09-25 03:27:01,757 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 03:27:01,767 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 03:27:01,787 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 03:27:01,812 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 03:27:01,812 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 03:27:01,813 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 03:27:01,813 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 03:27:01,813 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 03:27:01,813 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 03:27:01,813 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 03:27:01,813 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 03:27:01,835 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-09-25 03:27:01,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 03:27:01,843 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:01,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:01,845 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:01,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:01,852 INFO L82 PathProgramCache]: Analyzing trace with hash -2145994368, now seen corresponding path program 1 times [2020-09-25 03:27:01,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:01,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977733670] [2020-09-25 03:27:01,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:02,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:02,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:02,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:02,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:02,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 03:27:02,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 03:27:02,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-09-25 03:27:02,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:02,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 03:27:02,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 03:27:02,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 03:27:02,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 03:27:02,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:02,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:02,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:02,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:27:02,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:02,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 03:27:02,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:02,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:02,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:02,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:02,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 03:27:02,454 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 03:27:02,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977733670] [2020-09-25 03:27:02,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:27:02,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 03:27:02,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306905925] [2020-09-25 03:27:02,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 03:27:02,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:02,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 03:27:02,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 03:27:02,490 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 6 states. [2020-09-25 03:27:02,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:02,773 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2020-09-25 03:27:02,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 03:27:02,776 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-09-25 03:27:02,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:02,787 INFO L225 Difference]: With dead ends: 83 [2020-09-25 03:27:02,787 INFO L226 Difference]: Without dead ends: 43 [2020-09-25 03:27:02,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-25 03:27:02,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-25 03:27:02,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2020-09-25 03:27:02,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 03:27:02,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-25 03:27:02,840 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 17 [2020-09-25 03:27:02,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:02,840 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-25 03:27:02,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 03:27:02,841 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-25 03:27:02,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 03:27:02,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:02,842 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:02,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 03:27:02,843 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:02,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:02,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1756759471, now seen corresponding path program 1 times [2020-09-25 03:27:02,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:02,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140956380] [2020-09-25 03:27:02,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:02,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:03,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:03,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:03,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:03,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 03:27:03,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 03:27:03,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 594 [2020-09-25 03:27:03,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:03,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 03:27:03,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 03:27:03,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 03:27:03,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:03,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:03,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:03,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:03,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:27:03,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:03,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 03:27:03,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:03,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:03,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:03,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:03,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:27:03,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:27:03,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140956380] [2020-09-25 03:27:03,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:03,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 03:27:03,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700208829] [2020-09-25 03:27:03,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 03:27:03,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:03,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 03:27:03,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 03:27:03,551 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 8 states. [2020-09-25 03:27:03,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:03,725 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2020-09-25 03:27:03,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 03:27:03,725 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-25 03:27:03,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:03,727 INFO L225 Difference]: With dead ends: 59 [2020-09-25 03:27:03,727 INFO L226 Difference]: Without dead ends: 50 [2020-09-25 03:27:03,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-25 03:27:03,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-25 03:27:03,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-09-25 03:27:03,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-25 03:27:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-09-25 03:27:03,737 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 33 [2020-09-25 03:27:03,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:03,738 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-09-25 03:27:03,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 03:27:03,738 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-09-25 03:27:03,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-25 03:27:03,740 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:03,740 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:03,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 03:27:03,741 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:03,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:03,741 INFO L82 PathProgramCache]: Analyzing trace with hash 737263125, now seen corresponding path program 2 times [2020-09-25 03:27:03,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:03,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657053382] [2020-09-25 03:27:03,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:03,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:03,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:03,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:03,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:04,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:04,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-25 03:27:04,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 03:27:04,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1156 [2020-09-25 03:27:04,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:04,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 03:27:04,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 03:27:04,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 03:27:04,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:27:05,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:05,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:05,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:05,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:27:05,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:05,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 03:27:05,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:05,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:05,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:05,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:05,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:27:05,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657053382] [2020-09-25 03:27:05,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:05,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 03:27:05,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038625722] [2020-09-25 03:27:05,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 03:27:05,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:05,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 03:27:05,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-25 03:27:05,030 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 10 states. [2020-09-25 03:27:05,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:05,252 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-09-25 03:27:05,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 03:27:05,253 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-09-25 03:27:05,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:05,254 INFO L225 Difference]: With dead ends: 66 [2020-09-25 03:27:05,254 INFO L226 Difference]: Without dead ends: 57 [2020-09-25 03:27:05,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-09-25 03:27:05,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-25 03:27:05,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2020-09-25 03:27:05,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 03:27:05,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-09-25 03:27:05,263 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 40 [2020-09-25 03:27:05,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:05,264 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-09-25 03:27:05,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 03:27:05,264 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-09-25 03:27:05,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-25 03:27:05,265 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:05,266 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:05,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 03:27:05,266 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:05,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:05,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1672550673, now seen corresponding path program 3 times [2020-09-25 03:27:05,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:05,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319169485] [2020-09-25 03:27:05,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:05,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:05,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:05,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:05,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:06,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:06,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-25 03:27:06,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 03:27:06,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1299 [2020-09-25 03:27:06,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:06,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 03:27:06,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 03:27:06,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 03:27:06,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:06,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:06,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:06,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:06,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:27:06,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:06,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:27:06,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:06,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:06,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:06,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:06,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:27:06,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319169485] [2020-09-25 03:27:06,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:06,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 03:27:06,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630751703] [2020-09-25 03:27:06,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 03:27:06,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:06,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 03:27:06,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-25 03:27:06,701 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 12 states. [2020-09-25 03:27:06,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:06,978 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2020-09-25 03:27:06,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 03:27:06,979 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-09-25 03:27:06,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:06,980 INFO L225 Difference]: With dead ends: 73 [2020-09-25 03:27:06,980 INFO L226 Difference]: Without dead ends: 64 [2020-09-25 03:27:06,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-25 03:27:06,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-25 03:27:06,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2020-09-25 03:27:06,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-25 03:27:06,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-09-25 03:27:06,989 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 47 [2020-09-25 03:27:06,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:06,989 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-09-25 03:27:06,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 03:27:06,990 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-09-25 03:27:06,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-25 03:27:06,991 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:06,991 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:06,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 03:27:06,992 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:06,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:06,992 INFO L82 PathProgramCache]: Analyzing trace with hash 504689877, now seen corresponding path program 4 times [2020-09-25 03:27:06,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:06,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967252955] [2020-09-25 03:27:06,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:07,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:07,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:07,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:07,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:08,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:08,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-25 03:27:08,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 03:27:08,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1110 [2020-09-25 03:27:08,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:08,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 03:27:08,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 03:27:08,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 03:27:08,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:08,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:08,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:08,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:08,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:27:08,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:08,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 03:27:08,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:08,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:08,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:08,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:08,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:27:08,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967252955] [2020-09-25 03:27:08,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:08,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 03:27:08,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106601692] [2020-09-25 03:27:08,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 03:27:08,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:08,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 03:27:08,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-09-25 03:27:08,352 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 14 states. [2020-09-25 03:27:08,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:08,668 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2020-09-25 03:27:08,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 03:27:08,668 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-09-25 03:27:08,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:08,669 INFO L225 Difference]: With dead ends: 75 [2020-09-25 03:27:08,670 INFO L226 Difference]: Without dead ends: 69 [2020-09-25 03:27:08,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2020-09-25 03:27:08,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-25 03:27:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2020-09-25 03:27:08,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-25 03:27:08,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-09-25 03:27:08,677 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 54 [2020-09-25 03:27:08,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:08,678 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-09-25 03:27:08,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 03:27:08,678 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-09-25 03:27:08,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 03:27:08,679 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:08,679 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:08,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 03:27:08,680 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:08,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:08,680 INFO L82 PathProgramCache]: Analyzing trace with hash -182151121, now seen corresponding path program 5 times [2020-09-25 03:27:08,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:08,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079508157] [2020-09-25 03:27:08,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:08,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:08,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:08,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:08,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:09,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:09,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-25 03:27:09,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 03:27:09,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1305 [2020-09-25 03:27:09,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:09,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 03:27:09,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 03:27:09,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 03:27:09,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:10,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:10,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:10,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:10,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:27:10,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:10,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:27:10,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:10,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:10,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:10,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:10,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:27:10,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079508157] [2020-09-25 03:27:10,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:10,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 03:27:10,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264838785] [2020-09-25 03:27:10,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 03:27:10,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:10,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 03:27:10,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-09-25 03:27:10,161 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 16 states. [2020-09-25 03:27:10,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:10,509 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2020-09-25 03:27:10,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 03:27:10,512 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-09-25 03:27:10,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:10,513 INFO L225 Difference]: With dead ends: 87 [2020-09-25 03:27:10,513 INFO L226 Difference]: Without dead ends: 78 [2020-09-25 03:27:10,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2020-09-25 03:27:10,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-25 03:27:10,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2020-09-25 03:27:10,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-25 03:27:10,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-09-25 03:27:10,525 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 61 [2020-09-25 03:27:10,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:10,527 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-09-25 03:27:10,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 03:27:10,527 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-09-25 03:27:10,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-25 03:27:10,528 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:10,528 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:10,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 03:27:10,530 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:10,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:10,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1007592555, now seen corresponding path program 6 times [2020-09-25 03:27:10,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:10,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983002393] [2020-09-25 03:27:10,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:10,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:10,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:10,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:10,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:10,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:12,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:12,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-25 03:27:12,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 03:27:12,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1672 [2020-09-25 03:27:12,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:12,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 03:27:12,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 03:27:12,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-25 03:27:12,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:12,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:12,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:12,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:12,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:27:12,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:12,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:27:12,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:12,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:12,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:12,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:12,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:27:12,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983002393] [2020-09-25 03:27:12,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:12,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 03:27:12,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703538475] [2020-09-25 03:27:12,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 03:27:12,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:12,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 03:27:12,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-09-25 03:27:12,419 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 18 states. [2020-09-25 03:27:12,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:12,842 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2020-09-25 03:27:12,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 03:27:12,843 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 68 [2020-09-25 03:27:12,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:12,844 INFO L225 Difference]: With dead ends: 94 [2020-09-25 03:27:12,844 INFO L226 Difference]: Without dead ends: 85 [2020-09-25 03:27:12,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=733, Unknown=0, NotChecked=0, Total=992 [2020-09-25 03:27:12,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-25 03:27:12,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2020-09-25 03:27:12,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-25 03:27:12,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-09-25 03:27:12,852 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 68 [2020-09-25 03:27:12,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:12,852 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-09-25 03:27:12,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 03:27:12,852 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-09-25 03:27:12,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-25 03:27:12,854 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:12,854 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:12,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 03:27:12,854 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:12,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:12,855 INFO L82 PathProgramCache]: Analyzing trace with hash -527754897, now seen corresponding path program 7 times [2020-09-25 03:27:12,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:12,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726991880] [2020-09-25 03:27:12,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:12,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:12,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:13,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:13,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:14,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:14,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-25 03:27:14,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 03:27:14,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1665 [2020-09-25 03:27:14,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:14,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 03:27:14,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 03:27:14,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-25 03:27:14,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:27:14,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:14,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:14,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:14,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:27:14,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:14,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 03:27:14,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:14,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:14,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:14,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:14,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:27:14,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726991880] [2020-09-25 03:27:14,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:14,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 03:27:14,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610251248] [2020-09-25 03:27:14,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 03:27:14,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:14,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 03:27:14,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-09-25 03:27:14,808 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 20 states. [2020-09-25 03:27:15,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:15,277 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2020-09-25 03:27:15,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 03:27:15,278 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2020-09-25 03:27:15,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:15,279 INFO L225 Difference]: With dead ends: 96 [2020-09-25 03:27:15,279 INFO L226 Difference]: Without dead ends: 90 [2020-09-25 03:27:15,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 03:27:15,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-25 03:27:15,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2020-09-25 03:27:15,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 03:27:15,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-09-25 03:27:15,287 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 75 [2020-09-25 03:27:15,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:15,287 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-09-25 03:27:15,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 03:27:15,287 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-09-25 03:27:15,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-25 03:27:15,288 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:15,289 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:15,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 03:27:15,289 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:15,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:15,289 INFO L82 PathProgramCache]: Analyzing trace with hash -911019435, now seen corresponding path program 8 times [2020-09-25 03:27:15,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:15,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839119961] [2020-09-25 03:27:15,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:15,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:15,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:15,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:15,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:17,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:17,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-09-25 03:27:17,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 03:27:17,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1815 [2020-09-25 03:27:17,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:17,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 03:27:17,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 03:27:17,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-25 03:27:17,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:17,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:17,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:17,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:17,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:27:17,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:17,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:27:17,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:17,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:17,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:17,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:17,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:27:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:27:17,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839119961] [2020-09-25 03:27:17,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:17,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-25 03:27:17,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349241283] [2020-09-25 03:27:17,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-25 03:27:17,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:17,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-25 03:27:17,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-09-25 03:27:17,382 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 22 states. [2020-09-25 03:27:17,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:17,919 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2020-09-25 03:27:17,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-25 03:27:17,920 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2020-09-25 03:27:17,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:17,921 INFO L225 Difference]: With dead ends: 108 [2020-09-25 03:27:17,921 INFO L226 Difference]: Without dead ends: 99 [2020-09-25 03:27:17,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2020-09-25 03:27:17,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-25 03:27:17,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2020-09-25 03:27:17,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-25 03:27:17,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-09-25 03:27:17,936 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 82 [2020-09-25 03:27:17,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:17,936 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-09-25 03:27:17,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-25 03:27:17,937 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-09-25 03:27:17,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-25 03:27:17,939 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:17,939 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:17,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 03:27:17,939 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:17,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:17,940 INFO L82 PathProgramCache]: Analyzing trace with hash -388601169, now seen corresponding path program 9 times [2020-09-25 03:27:17,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:17,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038970178] [2020-09-25 03:27:17,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:17,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:18,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:18,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:18,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:20,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:20,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-25 03:27:20,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 03:27:20,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2652 [2020-09-25 03:27:20,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:20,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-25 03:27:20,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 03:27:20,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-25 03:27:20,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:27:20,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:20,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:20,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:20,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:27:20,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:20,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:27:20,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:20,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:20,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:20,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:20,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:27:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:27:20,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038970178] [2020-09-25 03:27:20,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:20,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-25 03:27:20,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456665579] [2020-09-25 03:27:20,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-25 03:27:20,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:20,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-25 03:27:20,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2020-09-25 03:27:20,930 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 24 states. [2020-09-25 03:27:21,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:21,447 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2020-09-25 03:27:21,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-25 03:27:21,448 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2020-09-25 03:27:21,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:21,449 INFO L225 Difference]: With dead ends: 115 [2020-09-25 03:27:21,449 INFO L226 Difference]: Without dead ends: 106 [2020-09-25 03:27:21,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=514, Invalid=1378, Unknown=0, NotChecked=0, Total=1892 [2020-09-25 03:27:21,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-25 03:27:21,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 99. [2020-09-25 03:27:21,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-25 03:27:21,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-09-25 03:27:21,457 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 89 [2020-09-25 03:27:21,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:21,457 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-09-25 03:27:21,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-25 03:27:21,457 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-09-25 03:27:21,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-25 03:27:21,458 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:21,459 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:21,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 03:27:21,459 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:21,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:21,459 INFO L82 PathProgramCache]: Analyzing trace with hash 512080149, now seen corresponding path program 10 times [2020-09-25 03:27:21,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:21,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071471430] [2020-09-25 03:27:21,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:21,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:21,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:21,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:22,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:24,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:24,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-09-25 03:27:24,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 03:27:24,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2600 [2020-09-25 03:27:24,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:24,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-25 03:27:24,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 03:27:24,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-25 03:27:24,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:24,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:24,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:24,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:24,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:27:24,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:24,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 03:27:24,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:24,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:24,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:24,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:24,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:27:24,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071471430] [2020-09-25 03:27:24,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:24,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-25 03:27:24,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821768707] [2020-09-25 03:27:24,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-25 03:27:24,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:24,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-25 03:27:24,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2020-09-25 03:27:24,416 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 26 states. [2020-09-25 03:27:25,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:25,148 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2020-09-25 03:27:25,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-25 03:27:25,148 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 96 [2020-09-25 03:27:25,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:25,149 INFO L225 Difference]: With dead ends: 122 [2020-09-25 03:27:25,149 INFO L226 Difference]: Without dead ends: 113 [2020-09-25 03:27:25,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=619, Invalid=1637, Unknown=0, NotChecked=0, Total=2256 [2020-09-25 03:27:25,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-25 03:27:25,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 106. [2020-09-25 03:27:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-25 03:27:25,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-09-25 03:27:25,156 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 96 [2020-09-25 03:27:25,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:25,156 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-09-25 03:27:25,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-25 03:27:25,156 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-09-25 03:27:25,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-25 03:27:25,157 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:25,157 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:25,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 03:27:25,158 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:25,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:25,158 INFO L82 PathProgramCache]: Analyzing trace with hash -178615313, now seen corresponding path program 11 times [2020-09-25 03:27:25,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:25,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413869227] [2020-09-25 03:27:25,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:25,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:25,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:25,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:25,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:27,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:27,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-09-25 03:27:27,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 03:27:27,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2708 [2020-09-25 03:27:27,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:27,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-25 03:27:27,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 03:27:27,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-25 03:27:27,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:27:28,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:28,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:28,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:28,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:27:28,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:28,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:27:28,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:28,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:28,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:28,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:28,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:27:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:27:28,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413869227] [2020-09-25 03:27:28,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:28,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-25 03:27:28,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81747927] [2020-09-25 03:27:28,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-25 03:27:28,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:28,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-25 03:27:28,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2020-09-25 03:27:28,303 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 28 states. [2020-09-25 03:27:29,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:29,036 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2020-09-25 03:27:29,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-25 03:27:29,037 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 103 [2020-09-25 03:27:29,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:29,038 INFO L225 Difference]: With dead ends: 129 [2020-09-25 03:27:29,038 INFO L226 Difference]: Without dead ends: 120 [2020-09-25 03:27:29,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=734, Invalid=1918, Unknown=0, NotChecked=0, Total=2652 [2020-09-25 03:27:29,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-25 03:27:29,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 113. [2020-09-25 03:27:29,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-25 03:27:29,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2020-09-25 03:27:29,044 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 103 [2020-09-25 03:27:29,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:29,045 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2020-09-25 03:27:29,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-25 03:27:29,045 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2020-09-25 03:27:29,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-25 03:27:29,046 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:29,046 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:29,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 03:27:29,046 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:29,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:29,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1265258539, now seen corresponding path program 12 times [2020-09-25 03:27:29,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:29,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221428309] [2020-09-25 03:27:29,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:29,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:29,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:29,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:29,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:31,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:31,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-09-25 03:27:31,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 03:27:31,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2849 [2020-09-25 03:27:31,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:31,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-25 03:27:31,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 03:27:31,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-25 03:27:31,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:32,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:32,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:32,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:32,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:27:32,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:32,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:27:32,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:32,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:32,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:32,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:32,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:27:32,459 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 486 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:27:32,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221428309] [2020-09-25 03:27:32,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:32,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-25 03:27:32,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734172661] [2020-09-25 03:27:32,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-25 03:27:32,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:32,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-25 03:27:32,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2020-09-25 03:27:32,463 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 30 states. [2020-09-25 03:27:33,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:33,426 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2020-09-25 03:27:33,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-25 03:27:33,427 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 110 [2020-09-25 03:27:33,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:33,429 INFO L225 Difference]: With dead ends: 136 [2020-09-25 03:27:33,429 INFO L226 Difference]: Without dead ends: 127 [2020-09-25 03:27:33,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=859, Invalid=2221, Unknown=0, NotChecked=0, Total=3080 [2020-09-25 03:27:33,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-25 03:27:33,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2020-09-25 03:27:33,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-25 03:27:33,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-09-25 03:27:33,435 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 110 [2020-09-25 03:27:33,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:33,436 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-09-25 03:27:33,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-25 03:27:33,436 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-09-25 03:27:33,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-09-25 03:27:33,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:33,437 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:33,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 03:27:33,438 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:33,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:33,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1972667089, now seen corresponding path program 13 times [2020-09-25 03:27:33,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:33,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943103478] [2020-09-25 03:27:33,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:33,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:33,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:33,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:34,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:36,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:36,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-09-25 03:27:36,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 03:27:36,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2728 [2020-09-25 03:27:36,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:36,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-25 03:27:36,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 03:27:36,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-09-25 03:27:36,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:36,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:36,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:36,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:36,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:27:36,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:36,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 03:27:36,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:36,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:36,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:36,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:36,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:36,678 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 0 proven. 572 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:27:36,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943103478] [2020-09-25 03:27:36,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:36,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-25 03:27:36,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717040852] [2020-09-25 03:27:36,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-25 03:27:36,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:36,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-25 03:27:36,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=762, Unknown=0, NotChecked=0, Total=992 [2020-09-25 03:27:36,681 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 32 states. [2020-09-25 03:27:37,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:37,608 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2020-09-25 03:27:37,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-25 03:27:37,609 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 117 [2020-09-25 03:27:37,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:37,611 INFO L225 Difference]: With dead ends: 143 [2020-09-25 03:27:37,611 INFO L226 Difference]: Without dead ends: 134 [2020-09-25 03:27:37,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=994, Invalid=2546, Unknown=0, NotChecked=0, Total=3540 [2020-09-25 03:27:37,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-25 03:27:37,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 127. [2020-09-25 03:27:37,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-25 03:27:37,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2020-09-25 03:27:37,618 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 117 [2020-09-25 03:27:37,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:37,618 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2020-09-25 03:27:37,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-25 03:27:37,619 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2020-09-25 03:27:37,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-25 03:27:37,620 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:37,620 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:37,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 03:27:37,620 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:37,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:37,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1091491477, now seen corresponding path program 14 times [2020-09-25 03:27:37,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:37,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620736253] [2020-09-25 03:27:37,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:37,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:37,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:37,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:38,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:38,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:40,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:40,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-09-25 03:27:40,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 03:27:40,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2979 [2020-09-25 03:27:40,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:40,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-25 03:27:40,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 03:27:40,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-09-25 03:27:40,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:41,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:41,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:41,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:41,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:41,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:27:41,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:41,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 03:27:41,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:41,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:41,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:41,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:41,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 665 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:27:41,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620736253] [2020-09-25 03:27:41,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:41,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-25 03:27:41,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162872639] [2020-09-25 03:27:41,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-25 03:27:41,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:41,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-25 03:27:41,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=861, Unknown=0, NotChecked=0, Total=1122 [2020-09-25 03:27:41,229 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 34 states. [2020-09-25 03:27:42,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:42,438 INFO L93 Difference]: Finished difference Result 150 states and 153 transitions. [2020-09-25 03:27:42,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-25 03:27:42,439 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 124 [2020-09-25 03:27:42,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:42,440 INFO L225 Difference]: With dead ends: 150 [2020-09-25 03:27:42,441 INFO L226 Difference]: Without dead ends: 141 [2020-09-25 03:27:42,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1139, Invalid=2893, Unknown=0, NotChecked=0, Total=4032 [2020-09-25 03:27:42,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-25 03:27:42,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 134. [2020-09-25 03:27:42,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-25 03:27:42,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-09-25 03:27:42,448 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 124 [2020-09-25 03:27:42,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:42,448 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-09-25 03:27:42,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-25 03:27:42,449 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-09-25 03:27:42,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-25 03:27:42,449 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:42,450 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:42,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 03:27:42,450 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:42,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:42,450 INFO L82 PathProgramCache]: Analyzing trace with hash 157105775, now seen corresponding path program 15 times [2020-09-25 03:27:42,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:42,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311116940] [2020-09-25 03:27:42,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:42,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:42,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:42,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:43,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:45,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:45,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-09-25 03:27:45,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 03:27:45,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3234 [2020-09-25 03:27:45,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:45,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-25 03:27:45,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 03:27:45,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-09-25 03:27:45,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:46,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:46,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:46,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:46,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:27:46,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:46,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:27:46,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:46,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:46,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:46,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:46,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 0 proven. 765 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:27:46,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311116940] [2020-09-25 03:27:46,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:46,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-25 03:27:46,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616400345] [2020-09-25 03:27:46,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-25 03:27:46,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:46,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-25 03:27:46,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=966, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 03:27:46,397 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 36 states. [2020-09-25 03:27:47,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:47,666 INFO L93 Difference]: Finished difference Result 157 states and 160 transitions. [2020-09-25 03:27:47,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-25 03:27:47,667 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 131 [2020-09-25 03:27:47,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:47,668 INFO L225 Difference]: With dead ends: 157 [2020-09-25 03:27:47,668 INFO L226 Difference]: Without dead ends: 148 [2020-09-25 03:27:47,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1294, Invalid=3262, Unknown=0, NotChecked=0, Total=4556 [2020-09-25 03:27:47,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-25 03:27:47,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 141. [2020-09-25 03:27:47,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-25 03:27:47,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2020-09-25 03:27:47,676 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 131 [2020-09-25 03:27:47,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:47,677 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2020-09-25 03:27:47,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-25 03:27:47,677 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2020-09-25 03:27:47,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-09-25 03:27:47,678 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:47,678 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:47,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 03:27:47,679 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:47,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:47,679 INFO L82 PathProgramCache]: Analyzing trace with hash -65196715, now seen corresponding path program 16 times [2020-09-25 03:27:47,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:47,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976770258] [2020-09-25 03:27:47,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:47,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:47,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:48,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:48,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:51,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:51,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-09-25 03:27:51,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 03:27:51,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3615 [2020-09-25 03:27:51,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:51,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-25 03:27:51,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 03:27:51,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-09-25 03:27:51,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0