/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=SHALLOWEST --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_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 00:04:20,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 00:04:20,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 00:04:20,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 00:04:20,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 00:04:20,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 00:04:20,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 00:04:20,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 00:04:20,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 00:04:20,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 00:04:20,464 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 00:04:20,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 00:04:20,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 00:04:20,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 00:04:20,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 00:04:20,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 00:04:20,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 00:04:20,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 00:04:20,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 00:04:20,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 00:04:20,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 00:04:20,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 00:04:20,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 00:04:20,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 00:04:20,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 00:04:20,510 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 00:04:20,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 00:04:20,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 00:04:20,514 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 00:04:20,515 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 00:04:20,516 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 00:04:20,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 00:04:20,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 00:04:20,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 00:04:20,526 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 00:04:20,526 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 00:04:20,527 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 00:04:20,528 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 00:04:20,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 00:04:20,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 00:04:20,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 00:04:20,531 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 00:04:20,572 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 00:04:20,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 00:04:20,574 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 00:04:20,574 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 00:04:20,574 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 00:04:20,575 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 00:04:20,575 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 00:04:20,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 00:04:20,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 00:04:20,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 00:04:20,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 00:04:20,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 00:04:20,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 00:04:20,576 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 00:04:20,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 00:04:20,577 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 00:04:20,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 00:04:20,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 00:04:20,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 00:04:20,578 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 00:04:20,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 00:04:20,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:04:20,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 00:04:20,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 00:04:20,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 00:04:20,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 00:04:20,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 00:04:20,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 00:04:20,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 00:04:20,580 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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;log-additional-information=true; [2020-09-25 00:04:21,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 00:04:21,060 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 00:04:21,064 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 00:04:21,066 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 00:04:21,067 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 00:04:21,068 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-09-25 00:04:21,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab46ff00a/fe6a31ba7812454195eb8d9e7a784c18/FLAGf9da52e32 [2020-09-25 00:04:21,750 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 00:04:21,751 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-09-25 00:04:21,760 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab46ff00a/fe6a31ba7812454195eb8d9e7a784c18/FLAGf9da52e32 [2020-09-25 00:04:22,097 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab46ff00a/fe6a31ba7812454195eb8d9e7a784c18 [2020-09-25 00:04:22,113 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 00:04:22,120 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 00:04:22,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 00:04:22,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 00:04:22,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 00:04:22,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:04:22" (1/1) ... [2020-09-25 00:04:22,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d4757cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:22, skipping insertion in model container [2020-09-25 00:04:22,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:04:22" (1/1) ... [2020-09-25 00:04:22,146 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 00:04:22,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 00:04:22,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:04:22,399 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 00:04:22,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:04:22,442 INFO L208 MainTranslator]: Completed translation [2020-09-25 00:04:22,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:22 WrapperNode [2020-09-25 00:04:22,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 00:04:22,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 00:04:22,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 00:04:22,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 00:04:22,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:22" (1/1) ... [2020-09-25 00:04:22,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:22" (1/1) ... [2020-09-25 00:04:22,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:22" (1/1) ... [2020-09-25 00:04:22,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:22" (1/1) ... [2020-09-25 00:04:22,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:22" (1/1) ... [2020-09-25 00:04:22,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:22" (1/1) ... [2020-09-25 00:04:22,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:22" (1/1) ... [2020-09-25 00:04:22,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 00:04:22,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 00:04:22,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 00:04:22,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 00:04:22,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:22" (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 00:04:22,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 00:04:22,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 00:04:22,644 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 00:04:22,645 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 00:04:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 00:04:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 00:04:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 00:04:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 00:04:22,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 00:04:22,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 00:04:22,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 00:04:22,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 00:04:22,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 00:04:22,908 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 00:04:22,909 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 00:04:22,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:04:22 BoogieIcfgContainer [2020-09-25 00:04:22,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 00:04:22,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 00:04:22,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 00:04:22,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 00:04:22,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:04:22" (1/3) ... [2020-09-25 00:04:22,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c74c86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:04:22, skipping insertion in model container [2020-09-25 00:04:22,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:22" (2/3) ... [2020-09-25 00:04:22,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c74c86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:04:22, skipping insertion in model container [2020-09-25 00:04:22,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:04:22" (3/3) ... [2020-09-25 00:04:22,933 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-09-25 00:04:22,952 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 00:04:22,963 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 00:04:22,988 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 00:04:23,021 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 00:04:23,021 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 00:04:23,021 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 00:04:23,021 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 00:04:23,021 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 00:04:23,022 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 00:04:23,022 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 00:04:23,022 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 00:04:23,045 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-09-25 00:04:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 00:04:23,052 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:23,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:23,054 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:23,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:23,064 INFO L82 PathProgramCache]: Analyzing trace with hash -439118320, now seen corresponding path program 1 times [2020-09-25 00:04:23,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:23,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330678538] [2020-09-25 00:04:23,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:23,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:23,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:23,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 00:04:23,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:23,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-09-25 00:04:23,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:23,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:23,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 00:04:23,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:23,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 00:04:23,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:23,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:23,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:23,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:23,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:23,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 00:04:23,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:23,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:23,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:23,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:23,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:23,426 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 00:04:23,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330678538] [2020-09-25 00:04:23,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:04:23,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 00:04:23,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645055293] [2020-09-25 00:04:23,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 00:04:23,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:23,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 00:04:23,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:04:23,462 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-09-25 00:04:23,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:23,574 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-09-25 00:04:23,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 00:04:23,577 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-09-25 00:04:23,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:23,588 INFO L225 Difference]: With dead ends: 45 [2020-09-25 00:04:23,588 INFO L226 Difference]: Without dead ends: 21 [2020-09-25 00:04:23,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:04:23,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-25 00:04:23,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-25 00:04:23,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-25 00:04:23,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-09-25 00:04:23,640 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2020-09-25 00:04:23,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:23,641 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-09-25 00:04:23,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 00:04:23,641 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-09-25 00:04:23,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 00:04:23,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:23,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:23,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 00:04:23,643 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:23,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:23,644 INFO L82 PathProgramCache]: Analyzing trace with hash -696780679, now seen corresponding path program 1 times [2020-09-25 00:04:23,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:23,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589511672] [2020-09-25 00:04:23,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:23,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:23,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:23,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:23,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 00:04:23,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:23,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-09-25 00:04:23,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:23,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:04:23,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:23,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 00:04:23,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:23,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:23,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:23,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:23,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:23,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:23,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 00:04:23,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:23,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:23,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:23,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:23,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:23,833 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 00:04:23,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589511672] [2020-09-25 00:04:23,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:04:23,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 00:04:23,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010832474] [2020-09-25 00:04:23,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 00:04:23,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:23,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 00:04:23,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 00:04:23,839 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 4 states. [2020-09-25 00:04:23,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:23,902 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-09-25 00:04:23,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 00:04:23,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-09-25 00:04:23,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:23,904 INFO L225 Difference]: With dead ends: 31 [2020-09-25 00:04:23,904 INFO L226 Difference]: Without dead ends: 25 [2020-09-25 00:04:23,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 00:04:23,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-25 00:04:23,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-09-25 00:04:23,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 00:04:23,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-25 00:04:23,919 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-09-25 00:04:23,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:23,920 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-25 00:04:23,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 00:04:23,920 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-25 00:04:23,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-25 00:04:23,922 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:23,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:23,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 00:04:23,923 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:23,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:23,923 INFO L82 PathProgramCache]: Analyzing trace with hash 908018199, now seen corresponding path program 1 times [2020-09-25 00:04:23,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:23,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756144236] [2020-09-25 00:04:23,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:23,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:24,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:24,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:24,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 00:04:24,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:24,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 405 [2020-09-25 00:04:24,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:24,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:04:24,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:24,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 00:04:24,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 00:04:24,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:24,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:24,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:24,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:24,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:24,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 00:04:24,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:24,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:24,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:24,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:24,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:24,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756144236] [2020-09-25 00:04:24,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:24,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 00:04:24,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924100073] [2020-09-25 00:04:24,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 00:04:24,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:24,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 00:04:24,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 00:04:24,471 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 6 states. [2020-09-25 00:04:24,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:24,600 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-09-25 00:04:24,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 00:04:24,601 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-09-25 00:04:24,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:24,602 INFO L225 Difference]: With dead ends: 36 [2020-09-25 00:04:24,602 INFO L226 Difference]: Without dead ends: 30 [2020-09-25 00:04:24,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 00:04:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-25 00:04:24,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-09-25 00:04:24,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 00:04:24,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-25 00:04:24,615 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-09-25 00:04:24,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:24,615 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-25 00:04:24,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 00:04:24,616 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-25 00:04:24,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 00:04:24,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:24,618 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:24,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 00:04:24,618 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:24,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:24,619 INFO L82 PathProgramCache]: Analyzing trace with hash 641420089, now seen corresponding path program 2 times [2020-09-25 00:04:24,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:24,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629054668] [2020-09-25 00:04:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:24,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:24,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:24,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:25,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:25,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 00:04:25,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 00:04:25,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 996 [2020-09-25 00:04:25,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:25,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 00:04:25,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:25,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 00:04:25,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:25,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:25,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:25,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:25,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:25,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:25,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 00:04:25,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:25,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:25,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:25,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:25,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 00:04:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:25,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629054668] [2020-09-25 00:04:25,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:25,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 00:04:25,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278483736] [2020-09-25 00:04:25,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 00:04:25,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:25,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 00:04:25,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 00:04:25,752 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2020-09-25 00:04:25,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:25,930 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-09-25 00:04:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 00:04:25,932 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-09-25 00:04:25,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:25,933 INFO L225 Difference]: With dead ends: 41 [2020-09-25 00:04:25,933 INFO L226 Difference]: Without dead ends: 35 [2020-09-25 00:04:25,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 00:04:25,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-25 00:04:25,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-09-25 00:04:25,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 00:04:25,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-25 00:04:25,941 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-09-25 00:04:25,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:25,942 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-25 00:04:25,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 00:04:25,943 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-25 00:04:25,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 00:04:25,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:25,944 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:25,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 00:04:25,945 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:25,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:25,946 INFO L82 PathProgramCache]: Analyzing trace with hash 2101454679, now seen corresponding path program 3 times [2020-09-25 00:04:25,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:25,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529618630] [2020-09-25 00:04:25,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:25,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:26,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:26,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:26,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:27,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:27,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 00:04:27,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 00:04:27,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1574 [2020-09-25 00:04:27,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:27,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:04:27,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:27,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 00:04:27,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:27,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:27,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:27,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:27,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:27,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:27,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 00:04:27,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:27,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:27,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:27,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:27,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:27,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529618630] [2020-09-25 00:04:27,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:27,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 00:04:27,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394580390] [2020-09-25 00:04:27,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 00:04:27,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:27,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 00:04:27,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 00:04:27,645 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 10 states. [2020-09-25 00:04:27,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:27,815 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-09-25 00:04:27,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 00:04:27,816 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-09-25 00:04:27,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:27,817 INFO L225 Difference]: With dead ends: 46 [2020-09-25 00:04:27,817 INFO L226 Difference]: Without dead ends: 40 [2020-09-25 00:04:27,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-25 00:04:27,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-25 00:04:27,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-09-25 00:04:27,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-25 00:04:27,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-25 00:04:27,825 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-09-25 00:04:27,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:27,826 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-25 00:04:27,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 00:04:27,826 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-25 00:04:27,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 00:04:27,827 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:27,827 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:27,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 00:04:27,828 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:27,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:27,828 INFO L82 PathProgramCache]: Analyzing trace with hash -888787463, now seen corresponding path program 4 times [2020-09-25 00:04:27,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:27,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776573483] [2020-09-25 00:04:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:27,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:27,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:28,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:28,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:28,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:29,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:29,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-25 00:04:29,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 00:04:29,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1908 [2020-09-25 00:04:29,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:29,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 00:04:29,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:29,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 00:04:29,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:29,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:29,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:29,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:29,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:29,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:29,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 00:04:29,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:29,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:29,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:29,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:29,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:29,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776573483] [2020-09-25 00:04:29,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:29,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 00:04:29,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505820747] [2020-09-25 00:04:29,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 00:04:29,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:29,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 00:04:29,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 00:04:29,929 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 12 states. [2020-09-25 00:04:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:30,261 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-09-25 00:04:30,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 00:04:30,262 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-09-25 00:04:30,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:30,263 INFO L225 Difference]: With dead ends: 51 [2020-09-25 00:04:30,263 INFO L226 Difference]: Without dead ends: 45 [2020-09-25 00:04:30,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-25 00:04:30,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-25 00:04:30,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-09-25 00:04:30,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 00:04:30,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-25 00:04:30,279 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-09-25 00:04:30,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:30,282 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-25 00:04:30,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 00:04:30,283 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-25 00:04:30,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 00:04:30,286 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:30,286 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:30,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 00:04:30,287 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:30,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:30,288 INFO L82 PathProgramCache]: Analyzing trace with hash 899054743, now seen corresponding path program 5 times [2020-09-25 00:04:30,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:30,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176976090] [2020-09-25 00:04:30,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:30,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:30,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:30,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:30,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:31,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:32,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:34,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:34,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 00:04:34,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 00:04:34,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4464 [2020-09-25 00:04:34,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:34,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 00:04:34,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:34,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 00:04:34,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:34,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:34,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:34,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:34,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:34,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:34,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 00:04:34,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:34,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:34,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:34,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:34,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:34,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176976090] [2020-09-25 00:04:34,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:34,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 00:04:34,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146718802] [2020-09-25 00:04:34,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 00:04:34,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:34,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 00:04:34,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-25 00:04:34,957 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 14 states. [2020-09-25 00:04:35,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:35,250 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-09-25 00:04:35,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 00:04:35,251 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-09-25 00:04:35,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:35,255 INFO L225 Difference]: With dead ends: 56 [2020-09-25 00:04:35,255 INFO L226 Difference]: Without dead ends: 50 [2020-09-25 00:04:35,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-25 00:04:35,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-25 00:04:35,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-09-25 00:04:35,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-25 00:04:35,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-09-25 00:04:35,271 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 41 [2020-09-25 00:04:35,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:35,271 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-09-25 00:04:35,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 00:04:35,271 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-09-25 00:04:35,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 00:04:35,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:35,274 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:35,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 00:04:35,274 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:35,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:35,275 INFO L82 PathProgramCache]: Analyzing trace with hash 212115641, now seen corresponding path program 6 times [2020-09-25 00:04:35,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:35,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471793837] [2020-09-25 00:04:35,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:35,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:35,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:35,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:35,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:36,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:37,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:38,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:40,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:40,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 00:04:40,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 00:04:40,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-25 00:04:40,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:40,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 00:04:40,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:40,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 00:04:40,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:40,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:40,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:40,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:40,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:40,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:40,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 00:04:40,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:40,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:40,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:40,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:40,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:40,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471793837] [2020-09-25 00:04:40,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:40,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 00:04:40,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828284126] [2020-09-25 00:04:40,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 00:04:40,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:40,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 00:04:40,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-25 00:04:40,507 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 16 states. [2020-09-25 00:04:40,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:40,835 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-09-25 00:04:40,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 00:04:40,835 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-09-25 00:04:40,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:40,836 INFO L225 Difference]: With dead ends: 61 [2020-09-25 00:04:40,836 INFO L226 Difference]: Without dead ends: 55 [2020-09-25 00:04:40,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-25 00:04:40,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-25 00:04:40,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-09-25 00:04:40,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 00:04:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-09-25 00:04:40,848 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 46 [2020-09-25 00:04:40,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:40,850 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-09-25 00:04:40,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 00:04:40,850 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-09-25 00:04:40,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 00:04:40,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:40,852 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:40,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 00:04:40,852 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:40,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:40,854 INFO L82 PathProgramCache]: Analyzing trace with hash 382845399, now seen corresponding path program 7 times [2020-09-25 00:04:40,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:40,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852427547] [2020-09-25 00:04:40,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:40,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:41,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:41,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:41,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:41,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:42,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:42,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:44,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:45,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:45,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 00:04:45,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 00:04:45,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 00:04:45,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:45,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 00:04:45,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:45,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 00:04:45,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:46,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:46,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:46,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:46,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:46,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:46,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 00:04:46,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:46,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:46,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:46,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:46,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:46,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852427547] [2020-09-25 00:04:46,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:46,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 00:04:46,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154617126] [2020-09-25 00:04:46,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 00:04:46,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:46,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 00:04:46,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-25 00:04:46,211 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 18 states. [2020-09-25 00:04:46,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:46,703 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-09-25 00:04:46,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-25 00:04:46,703 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-09-25 00:04:46,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:46,704 INFO L225 Difference]: With dead ends: 66 [2020-09-25 00:04:46,705 INFO L226 Difference]: Without dead ends: 60 [2020-09-25 00:04:46,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-25 00:04:46,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-25 00:04:46,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-09-25 00:04:46,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-25 00:04:46,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-09-25 00:04:46,712 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 51 [2020-09-25 00:04:46,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:46,712 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-09-25 00:04:46,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 00:04:46,713 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-09-25 00:04:46,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-25 00:04:46,713 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:46,714 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:46,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 00:04:46,714 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:46,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:46,714 INFO L82 PathProgramCache]: Analyzing trace with hash -471686279, now seen corresponding path program 8 times [2020-09-25 00:04:46,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:46,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598937619] [2020-09-25 00:04:46,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:46,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:46,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:46,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:47,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:47,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:47,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:47,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:48,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:49,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:51,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:51,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:51,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-25 00:04:51,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 00:04:51,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 00:04:51,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:51,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 00:04:51,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:51,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-25 00:04:51,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:52,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:52,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:52,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:52,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:52,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:52,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 00:04:52,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:52,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:52,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:52,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:52,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:52,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598937619] [2020-09-25 00:04:52,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:52,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 00:04:52,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317844287] [2020-09-25 00:04:52,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 00:04:52,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:52,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 00:04:52,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-25 00:04:52,035 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 20 states. [2020-09-25 00:04:52,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:52,456 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-09-25 00:04:52,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-25 00:04:52,456 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2020-09-25 00:04:52,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:52,457 INFO L225 Difference]: With dead ends: 71 [2020-09-25 00:04:52,458 INFO L226 Difference]: Without dead ends: 65 [2020-09-25 00:04:52,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 00:04:52,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-25 00:04:52,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-09-25 00:04:52,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-25 00:04:52,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-09-25 00:04:52,475 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 56 [2020-09-25 00:04:52,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:52,476 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-09-25 00:04:52,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 00:04:52,476 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-09-25 00:04:52,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 00:04:52,479 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:52,479 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:52,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 00:04:52,479 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:52,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:52,481 INFO L82 PathProgramCache]: Analyzing trace with hash -945326313, now seen corresponding path program 9 times [2020-09-25 00:04:52,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:52,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697571003] [2020-09-25 00:04:52,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:52,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:52,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:53,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:53,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:53,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:54,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:54,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:55,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:57,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:57,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-25 00:04:57,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 00:04:57,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 00:04:57,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:57,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 00:04:57,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:57,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-25 00:04:57,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:57,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:57,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:57,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:57,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:57,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:57,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 00:04:57,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:57,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:57,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:57,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:57,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:57,774 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:57,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697571003] [2020-09-25 00:04:57,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:57,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-25 00:04:57,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073490662] [2020-09-25 00:04:57,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-25 00:04:57,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:57,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-25 00:04:57,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-25 00:04:57,779 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 22 states. [2020-09-25 00:04:58,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:58,269 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-09-25 00:04:58,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-25 00:04:58,270 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2020-09-25 00:04:58,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:58,271 INFO L225 Difference]: With dead ends: 76 [2020-09-25 00:04:58,271 INFO L226 Difference]: Without dead ends: 70 [2020-09-25 00:04:58,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-09-25 00:04:58,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-25 00:04:58,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-09-25 00:04:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-25 00:04:58,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-09-25 00:04:58,278 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 61 [2020-09-25 00:04:58,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:58,281 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-09-25 00:04:58,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-25 00:04:58,282 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-09-25 00:04:58,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-25 00:04:58,283 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:58,283 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:58,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 00:04:58,283 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:58,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:58,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1165216199, now seen corresponding path program 10 times [2020-09-25 00:04:58,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:58,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799543785] [2020-09-25 00:04:58,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:58,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:58,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:58,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:58,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:59,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:59,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:59,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:00,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:01,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:01,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:01,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:02,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:03,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:03,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 00:05:03,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 00:05:03,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 00:05:03,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:03,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-25 00:05:03,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:05:03,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-25 00:05:03,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:03,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:03,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:03,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:03,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:05:03,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:03,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 00:05:03,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:03,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:03,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:03,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:03,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:03,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799543785] [2020-09-25 00:05:03,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:03,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-25 00:05:03,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460175256] [2020-09-25 00:05:03,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-25 00:05:03,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:03,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-25 00:05:03,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-09-25 00:05:03,672 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 24 states. [2020-09-25 00:05:04,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:04,360 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2020-09-25 00:05:04,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-25 00:05:04,361 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 66 [2020-09-25 00:05:04,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:04,362 INFO L225 Difference]: With dead ends: 81 [2020-09-25 00:05:04,362 INFO L226 Difference]: Without dead ends: 75 [2020-09-25 00:05:04,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-09-25 00:05:04,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-25 00:05:04,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-09-25 00:05:04,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-25 00:05:04,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-09-25 00:05:04,370 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 66 [2020-09-25 00:05:04,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:04,371 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-09-25 00:05:04,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-25 00:05:04,371 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-09-25 00:05:04,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-25 00:05:04,372 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:04,372 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:04,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 00:05:04,372 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:04,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:04,373 INFO L82 PathProgramCache]: Analyzing trace with hash 499883095, now seen corresponding path program 11 times [2020-09-25 00:05:04,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:04,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122639455] [2020-09-25 00:05:04,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:04,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:04,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:04,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:04,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:05,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:05,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:06,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:06,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:07,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking...