/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 SequenceOfStatements --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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_03.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:34:02,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:34:02,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:34:02,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:34:02,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:34:02,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:34:02,477 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:34:02,479 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:34:02,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:34:02,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:34:02,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:34:02,484 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:34:02,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:34:02,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:34:02,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:34:02,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:34:02,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:34:02,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:34:02,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:34:02,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:34:02,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:34:02,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:34:02,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:34:02,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:34:02,507 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:34:02,508 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:34:02,508 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:34:02,509 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:34:02,510 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:34:02,514 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:34:02,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:34:02,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:34:02,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:34:02,520 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:34:02,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:34:02,522 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:34:02,522 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:34:02,523 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:34:02,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:34:02,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:34:02,531 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:34:02,532 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 [2020-10-27 14:34:02,560 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:34:02,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:34:02,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:34:02,562 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:34:02,562 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:34:02,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:34:02,563 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:34:02,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:34:02,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:34:02,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:34:02,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:34:02,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:34:02,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:34:02,564 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:34:02,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:34:02,564 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:34:02,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:34:02,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:34:02,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:34:02,565 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:34:02,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:34:02,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:34:02,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:34:02,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:34:02,566 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:34:02,566 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:34:02,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:34:02,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:34:02,567 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:34:02,567 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:34:02,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:34:03,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:34:03,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:34:03,022 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:34:03,022 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:34:03,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_03.i [2020-10-27 14:34:03,104 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/63ea68075/9594a2d725bd488996ee262163cce177/FLAG1dadbb079 [2020-10-27 14:34:03,796 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:34:03,797 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_two_index_03.i [2020-10-27 14:34:03,805 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/63ea68075/9594a2d725bd488996ee262163cce177/FLAG1dadbb079 [2020-10-27 14:34:04,163 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/63ea68075/9594a2d725bd488996ee262163cce177 [2020-10-27 14:34:04,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:34:04,173 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:34:04,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:34:04,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:34:04,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:34:04,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:34:04" (1/1) ... [2020-10-27 14:34:04,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50ce6a90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:04, skipping insertion in model container [2020-10-27 14:34:04,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:34:04" (1/1) ... [2020-10-27 14:34:04,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:34:04,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:34:04,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:34:04,408 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:34:04,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:34:04,454 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:34:04,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:04 WrapperNode [2020-10-27 14:34:04,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:34:04,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:34:04,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:34:04,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:34:04,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:04" (1/1) ... [2020-10-27 14:34:04,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:04" (1/1) ... [2020-10-27 14:34:04,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:04" (1/1) ... [2020-10-27 14:34:04,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:04" (1/1) ... [2020-10-27 14:34:04,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:04" (1/1) ... [2020-10-27 14:34:04,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:04" (1/1) ... [2020-10-27 14:34:04,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:04" (1/1) ... [2020-10-27 14:34:04,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:34:04,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:34:04,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:34:04,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:34:04,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:04" (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 [2020-10-27 14:34:04,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:34:04,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:34:04,590 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:34:04,591 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:34:04,591 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:34:04,592 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:34:04,592 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:34:04,593 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:34:04,593 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:34:04,593 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:34:04,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:34:04,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:34:04,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:34:04,595 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:34:04,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:34:04,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:34:04,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:34:04,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:34:04,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:34:04,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:34:05,253 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:34:05,254 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 14:34:05,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:34:05 BoogieIcfgContainer [2020-10-27 14:34:05,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:34:05,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:34:05,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:34:05,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:34:05,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:34:04" (1/3) ... [2020-10-27 14:34:05,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701d66d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:34:05, skipping insertion in model container [2020-10-27 14:34:05,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:04" (2/3) ... [2020-10-27 14:34:05,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701d66d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:34:05, skipping insertion in model container [2020-10-27 14:34:05,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:34:05" (3/3) ... [2020-10-27 14:34:05,272 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_03.i [2020-10-27 14:34:05,285 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:34:05,292 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:34:05,309 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:34:05,352 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:34:05,352 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:34:05,352 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:34:05,352 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:34:05,352 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:34:05,353 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:34:05,353 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:34:05,353 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:34:05,377 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-27 14:34:05,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 14:34:05,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:05,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:05,386 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:05,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:05,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1774182118, now seen corresponding path program 1 times [2020-10-27 14:34:05,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:05,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019013664] [2020-10-27 14:34:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:05,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:05,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:05,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:05,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 14:34:05,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:34:05,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 336 [2020-10-27 14:34:05,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:05,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:05,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:34:05,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:05,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:34:05,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:05,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:05,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:05,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:05,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:05,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:34:05,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:05,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:05,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:05,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:05,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:34:06,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019013664] [2020-10-27 14:34:06,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:34:06,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:34:06,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019730173] [2020-10-27 14:34:06,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:34:06,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:06,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:34:06,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:34:06,034 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-27 14:34:06,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:06,146 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2020-10-27 14:34:06,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:34:06,148 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-27 14:34:06,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:06,156 INFO L225 Difference]: With dead ends: 48 [2020-10-27 14:34:06,156 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 14:34:06,160 INFO L677 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 [2020-10-27 14:34:06,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 14:34:06,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-27 14:34:06,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 14:34:06,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-27 14:34:06,204 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2020-10-27 14:34:06,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:06,205 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-27 14:34:06,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:34:06,205 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-27 14:34:06,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 14:34:06,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:06,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:06,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:34:06,207 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:06,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:06,208 INFO L82 PathProgramCache]: Analyzing trace with hash 414065378, now seen corresponding path program 1 times [2020-10-27 14:34:06,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:06,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749314579] [2020-10-27 14:34:06,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:06,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:06,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:06,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:06,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 14:34:06,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:34:06,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-27 14:34:06,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:06,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:34:06,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:34:06,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:34:06,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:06,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:06,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:06,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:06,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:06,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:06,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 14:34:06,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:06,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:06,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:06,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:06,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:34:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:34:06,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749314579] [2020-10-27 14:34:06,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:34:06,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:34:06,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932689358] [2020-10-27 14:34:06,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:34:06,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:06,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:34:06,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:34:06,620 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2020-10-27 14:34:06,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:06,748 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-10-27 14:34:06,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:34:06,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-27 14:34:06,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:06,753 INFO L225 Difference]: With dead ends: 40 [2020-10-27 14:34:06,753 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 14:34:06,754 INFO L677 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 [2020-10-27 14:34:06,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 14:34:06,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-10-27 14:34:06,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 14:34:06,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-27 14:34:06,765 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2020-10-27 14:34:06,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:06,766 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-27 14:34:06,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:34:06,766 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-27 14:34:06,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 14:34:06,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:06,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:06,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:34:06,768 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:06,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:06,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1170351871, now seen corresponding path program 1 times [2020-10-27 14:34:06,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:06,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470471416] [2020-10-27 14:34:06,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:06,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:06,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:06,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:06,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:07,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:07,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 14:34:07,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:07,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 593 [2020-10-27 14:34:07,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:07,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:34:07,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:34:07,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 14:34:07,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:07,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:07,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:07,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:07,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:07,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:07,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:34:07,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:07,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:07,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:07,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:07,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:34:07,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470471416] [2020-10-27 14:34:07,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:07,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:34:07,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483307506] [2020-10-27 14:34:07,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:34:07,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:07,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:34:07,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:34:07,474 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-10-27 14:34:07,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:07,652 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-27 14:34:07,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:34:07,654 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-27 14:34:07,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:07,655 INFO L225 Difference]: With dead ends: 46 [2020-10-27 14:34:07,655 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 14:34:07,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:34:07,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 14:34:07,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-10-27 14:34:07,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 14:34:07,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-27 14:34:07,665 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 19 [2020-10-27 14:34:07,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:07,665 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-27 14:34:07,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:34:07,666 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-27 14:34:07,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 14:34:07,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:07,667 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:07,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:34:07,668 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:07,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:07,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1420739774, now seen corresponding path program 2 times [2020-10-27 14:34:07,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:07,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939573179] [2020-10-27 14:34:07,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:07,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:07,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:07,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:08,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:08,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 14:34:08,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:08,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 773 [2020-10-27 14:34:08,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:08,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:34:08,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 14:34:08,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:34:08,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:08,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:08,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:08,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:08,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:08,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:08,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:34:08,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:08,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:08,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:08,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:08,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 14:34:08,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939573179] [2020-10-27 14:34:08,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:08,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:34:08,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379165791] [2020-10-27 14:34:08,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:34:08,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:08,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:34:08,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:34:08,550 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-10-27 14:34:08,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:08,734 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-10-27 14:34:08,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:34:08,735 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-27 14:34:08,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:08,736 INFO L225 Difference]: With dead ends: 52 [2020-10-27 14:34:08,736 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 14:34:08,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:34:08,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 14:34:08,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2020-10-27 14:34:08,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 14:34:08,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-27 14:34:08,745 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-10-27 14:34:08,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:08,745 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-27 14:34:08,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:34:08,746 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-27 14:34:08,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 14:34:08,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:08,747 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:08,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:34:08,747 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:08,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:08,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1013754463, now seen corresponding path program 3 times [2020-10-27 14:34:08,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:08,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933973189] [2020-10-27 14:34:08,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:08,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:08,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:08,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:09,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:09,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 14:34:09,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:09,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1172 [2020-10-27 14:34:09,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:09,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:34:09,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:34:09,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:34:09,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:10,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:10,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:10,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:10,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:10,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:10,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:34:10,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:10,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:10,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:10,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:10,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:34:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:34:10,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933973189] [2020-10-27 14:34:10,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:10,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:34:10,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754805991] [2020-10-27 14:34:10,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:34:10,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:10,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:34:10,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:34:10,054 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-10-27 14:34:10,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:10,306 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-10-27 14:34:10,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:34:10,308 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-27 14:34:10,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:10,309 INFO L225 Difference]: With dead ends: 58 [2020-10-27 14:34:10,309 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 14:34:10,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:34:10,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 14:34:10,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-10-27 14:34:10,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 14:34:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-27 14:34:10,318 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2020-10-27 14:34:10,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:10,319 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-27 14:34:10,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:34:10,319 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-27 14:34:10,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 14:34:10,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:10,320 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:10,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:34:10,320 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:10,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:10,321 INFO L82 PathProgramCache]: Analyzing trace with hash -2063426654, now seen corresponding path program 4 times [2020-10-27 14:34:10,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:10,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403987745] [2020-10-27 14:34:10,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:10,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:10,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:10,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:11,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:11,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 14:34:11,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:11,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1620 [2020-10-27 14:34:11,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:11,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:34:11,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 14:34:11,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:34:11,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:12,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:12,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:12,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:12,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:12,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:12,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:34:12,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:12,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:12,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:12,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:12,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 14:34:12,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403987745] [2020-10-27 14:34:12,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:12,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:34:12,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501756827] [2020-10-27 14:34:12,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:34:12,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:12,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:34:12,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:34:12,088 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 8 states. [2020-10-27 14:34:12,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:12,345 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-27 14:34:12,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:34:12,346 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-27 14:34:12,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:12,347 INFO L225 Difference]: With dead ends: 64 [2020-10-27 14:34:12,347 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 14:34:12,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:34:12,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 14:34:12,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-27 14:34:12,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 14:34:12,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-27 14:34:12,355 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 25 [2020-10-27 14:34:12,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:12,356 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-27 14:34:12,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:34:12,356 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-27 14:34:12,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:34:12,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:12,357 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:12,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:34:12,357 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:12,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:12,358 INFO L82 PathProgramCache]: Analyzing trace with hash 532089409, now seen corresponding path program 5 times [2020-10-27 14:34:12,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:12,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975896857] [2020-10-27 14:34:12,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:12,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:12,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:12,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:14,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:14,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 14:34:14,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:14,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2291 [2020-10-27 14:34:14,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:14,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:34:14,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 14:34:14,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:34:14,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:14,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:14,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:14,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:14,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:14,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:14,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:14,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:34:14,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:14,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:14,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:14,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:14,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:34:14,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975896857] [2020-10-27 14:34:14,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:14,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:34:14,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253159507] [2020-10-27 14:34:14,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:34:14,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:14,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:34:14,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:34:14,819 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 9 states. [2020-10-27 14:34:15,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:15,161 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-10-27 14:34:15,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:34:15,162 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-27 14:34:15,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:15,163 INFO L225 Difference]: With dead ends: 70 [2020-10-27 14:34:15,164 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 14:34:15,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:34:15,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 14:34:15,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2020-10-27 14:34:15,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 14:34:15,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-27 14:34:15,172 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2020-10-27 14:34:15,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:15,172 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-27 14:34:15,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:34:15,172 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-27 14:34:15,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 14:34:15,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:15,174 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:15,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:34:15,174 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:15,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:15,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1725973506, now seen corresponding path program 6 times [2020-10-27 14:34:15,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:15,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244977259] [2020-10-27 14:34:15,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:15,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:15,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:15,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:17,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:17,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:34:17,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:17,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2790 [2020-10-27 14:34:17,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:17,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:34:17,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 14:34:17,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:34:17,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:18,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:18,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:18,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:18,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:18,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:18,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:34:18,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:18,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:18,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:18,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:18,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 14:34:18,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244977259] [2020-10-27 14:34:18,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:18,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:34:18,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699986850] [2020-10-27 14:34:18,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:34:18,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:18,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:34:18,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:34:18,168 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 10 states. [2020-10-27 14:34:18,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:18,535 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-10-27 14:34:18,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:34:18,537 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-27 14:34:18,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:18,539 INFO L225 Difference]: With dead ends: 76 [2020-10-27 14:34:18,539 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 14:34:18,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:34:18,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 14:34:18,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 35. [2020-10-27 14:34:18,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 14:34:18,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-27 14:34:18,556 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 29 [2020-10-27 14:34:18,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:18,556 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-27 14:34:18,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:34:18,556 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-27 14:34:18,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:34:18,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:18,557 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:18,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:34:18,558 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:18,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:18,561 INFO L82 PathProgramCache]: Analyzing trace with hash -74778911, now seen corresponding path program 7 times [2020-10-27 14:34:18,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:18,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665736719] [2020-10-27 14:34:18,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:18,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:18,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:18,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:22,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:22,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 14:34:22,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:22,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4413 [2020-10-27 14:34:22,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:22,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:34:22,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:34:22,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:34:22,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:23,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:23,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:23,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:23,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:23,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:23,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:34:23,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:23,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:23,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:23,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:23,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 14:34:23,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665736719] [2020-10-27 14:34:23,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:23,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:34:23,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999581916] [2020-10-27 14:34:23,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:34:23,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:23,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:34:23,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:34:23,202 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 11 states. [2020-10-27 14:34:23,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:23,561 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2020-10-27 14:34:23,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:34:23,562 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 14:34:23,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:23,563 INFO L225 Difference]: With dead ends: 82 [2020-10-27 14:34:23,563 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 14:34:23,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:34:23,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 14:34:23,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 37. [2020-10-27 14:34:23,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 14:34:23,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-27 14:34:23,571 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 31 [2020-10-27 14:34:23,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:23,572 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-27 14:34:23,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:34:23,572 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-27 14:34:23,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:34:23,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:23,573 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:23,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:34:23,574 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:23,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:23,574 INFO L82 PathProgramCache]: Analyzing trace with hash -91736990, now seen corresponding path program 8 times [2020-10-27 14:34:23,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:23,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356404014] [2020-10-27 14:34:23,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:23,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:23,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:23,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:28,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:28,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:34:28,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:28,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:34:28,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:28,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:34:28,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:34:28,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:34:28,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:28,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:28,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:28,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:28,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:28,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:28,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:34:28,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:28,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:28,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:28,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:28,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 14:34:28,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356404014] [2020-10-27 14:34:28,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:28,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:34:28,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187523588] [2020-10-27 14:34:28,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:34:28,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:28,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:34:28,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:34:28,745 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 12 states. [2020-10-27 14:34:28,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:28,999 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-10-27 14:34:28,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:34:29,000 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-27 14:34:29,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:29,001 INFO L225 Difference]: With dead ends: 88 [2020-10-27 14:34:29,001 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 14:34:29,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:34:29,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 14:34:29,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 39. [2020-10-27 14:34:29,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 14:34:29,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-27 14:34:29,023 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 33 [2020-10-27 14:34:29,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:29,024 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-27 14:34:29,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:34:29,024 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-27 14:34:29,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:34:29,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:29,028 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:29,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:34:29,028 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:29,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:29,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1955521663, now seen corresponding path program 9 times [2020-10-27 14:34:29,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:29,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316810618] [2020-10-27 14:34:29,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:29,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:29,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:29,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:34,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:34,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:34:34,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:34,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:34:34,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:34,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:34:34,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 14:34:34,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 14:34:34,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:34,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:34,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:34,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:34,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:34,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:34,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:34:34,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:34,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:34,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:34,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:34,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:34,244 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-27 14:34:34,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316810618] [2020-10-27 14:34:34,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:34,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:34:34,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579679383] [2020-10-27 14:34:34,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:34:34,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:34,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:34:34,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:34:34,248 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 13 states. [2020-10-27 14:34:34,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:34,665 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2020-10-27 14:34:34,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:34:34,666 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-27 14:34:34,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:34,667 INFO L225 Difference]: With dead ends: 94 [2020-10-27 14:34:34,667 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 14:34:34,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:34:34,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 14:34:34,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 41. [2020-10-27 14:34:34,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 14:34:34,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-27 14:34:34,675 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 35 [2020-10-27 14:34:34,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:34,676 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-27 14:34:34,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:34:34,676 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-27 14:34:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 14:34:34,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:34,677 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:34,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:34:34,677 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:34,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:34,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1307022142, now seen corresponding path program 10 times [2020-10-27 14:34:34,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:34,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830861273] [2020-10-27 14:34:34,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:34,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:34,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:35,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:39,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:39,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 14:34:39,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:39,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:34:39,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:39,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:34:39,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:34:39,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:34:39,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:39,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:39,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:39,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:39,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:39,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:39,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:39,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:34:39,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:39,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:39,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:39,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:39,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-27 14:34:39,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830861273] [2020-10-27 14:34:39,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:39,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:34:39,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402503253] [2020-10-27 14:34:39,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:34:39,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:39,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:34:39,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:34:39,944 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 14 states. [2020-10-27 14:34:40,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:40,325 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2020-10-27 14:34:40,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:34:40,326 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-27 14:34:40,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:40,327 INFO L225 Difference]: With dead ends: 100 [2020-10-27 14:34:40,327 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 14:34:40,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:34:40,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 14:34:40,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 43. [2020-10-27 14:34:40,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 14:34:40,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-27 14:34:40,336 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 37 [2020-10-27 14:34:40,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:40,337 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-27 14:34:40,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:34:40,337 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-27 14:34:40,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:34:40,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:40,338 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:40,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:34:40,338 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:40,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:40,339 INFO L82 PathProgramCache]: Analyzing trace with hash 726366241, now seen corresponding path program 11 times [2020-10-27 14:34:40,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:40,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777111287] [2020-10-27 14:34:40,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:40,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:40,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:40,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:45,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:45,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:34:45,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:45,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:34:45,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:45,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:34:45,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 14:34:45,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 14:34:45,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:45,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:45,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:45,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:45,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:45,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:45,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:34:45,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:45,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:45,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:45,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:45,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:45,601 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-27 14:34:45,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777111287] [2020-10-27 14:34:45,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:45,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:34:45,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54001424] [2020-10-27 14:34:45,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:34:45,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:45,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:34:45,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:34:45,603 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 15 states. [2020-10-27 14:34:46,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:46,024 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2020-10-27 14:34:46,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:34:46,025 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-27 14:34:46,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:46,026 INFO L225 Difference]: With dead ends: 106 [2020-10-27 14:34:46,026 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 14:34:46,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:34:46,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 14:34:46,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 45. [2020-10-27 14:34:46,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 14:34:46,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-27 14:34:46,047 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 39 [2020-10-27 14:34:46,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:46,048 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-27 14:34:46,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:34:46,048 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-27 14:34:46,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 14:34:46,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:46,049 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:46,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:34:46,049 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:46,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:46,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1473319646, now seen corresponding path program 12 times [2020-10-27 14:34:46,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:46,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215701871] [2020-10-27 14:34:46,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:46,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:46,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:46,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:51,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:51,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 14:34:51,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:51,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:34:51,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:51,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:34:51,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:34:51,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:34:51,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:51,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:51,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:51,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:51,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:51,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:51,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:51,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:34:51,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:51,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:51,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:51,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:51,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-27 14:34:51,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215701871] [2020-10-27 14:34:51,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:51,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:34:51,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659124028] [2020-10-27 14:34:51,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:34:51,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:51,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:34:51,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:34:51,320 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 16 states. [2020-10-27 14:34:51,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:51,754 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2020-10-27 14:34:51,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:34:51,754 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-27 14:34:51,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:51,755 INFO L225 Difference]: With dead ends: 112 [2020-10-27 14:34:51,755 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 14:34:51,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:34:51,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 14:34:51,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 47. [2020-10-27 14:34:51,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 14:34:51,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-27 14:34:51,772 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 41 [2020-10-27 14:34:51,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:51,773 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-27 14:34:51,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:34:51,773 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-27 14:34:51,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:34:51,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:51,774 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:51,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:34:51,774 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:51,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:51,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2122058945, now seen corresponding path program 13 times [2020-10-27 14:34:51,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:51,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232333156] [2020-10-27 14:34:51,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:51,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:51,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:52,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:56,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:56,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:34:56,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:56,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 14:34:56,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:56,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:34:56,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:34:56,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:34:56,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:57,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:57,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:57,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:57,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:57,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:57,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 14:34:57,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:57,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:57,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:57,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:57,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:57,052 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-27 14:34:57,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232333156] [2020-10-27 14:34:57,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:57,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:34:57,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974507760] [2020-10-27 14:34:57,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:34:57,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:57,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:34:57,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:34:57,055 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 17 states. [2020-10-27 14:34:57,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:57,425 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2020-10-27 14:34:57,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:34:57,425 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-10-27 14:34:57,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:57,426 INFO L225 Difference]: With dead ends: 118 [2020-10-27 14:34:57,427 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 14:34:57,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:34:57,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 14:34:57,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 49. [2020-10-27 14:34:57,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 14:34:57,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-27 14:34:57,435 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 43 [2020-10-27 14:34:57,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:57,435 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-27 14:34:57,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:34:57,435 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-27 14:34:57,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:34:57,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:57,436 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:57,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:34:57,436 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:57,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:57,437 INFO L82 PathProgramCache]: Analyzing trace with hash 2146022786, now seen corresponding path program 14 times [2020-10-27 14:34:57,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:57,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795189764] [2020-10-27 14:34:57,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:57,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:57,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:58,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:02,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:02,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:35:02,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:35:02,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:35:02,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:02,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:35:02,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:35:02,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:35:02,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:02,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:02,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:02,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:02,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:02,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:02,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:35:02,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:02,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:02,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:02,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:02,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-27 14:35:02,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795189764] [2020-10-27 14:35:02,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:02,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:35:02,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339086713] [2020-10-27 14:35:02,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:35:02,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:02,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:35:02,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:35:02,746 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 18 states. [2020-10-27 14:35:03,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:03,175 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2020-10-27 14:35:03,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:35:03,176 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-27 14:35:03,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:03,178 INFO L225 Difference]: With dead ends: 124 [2020-10-27 14:35:03,178 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 14:35:03,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:35:03,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 14:35:03,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 51. [2020-10-27 14:35:03,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 14:35:03,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-27 14:35:03,186 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 45 [2020-10-27 14:35:03,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:03,186 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-27 14:35:03,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:35:03,187 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-27 14:35:03,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:35:03,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:03,187 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:03,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:35:03,188 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:03,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:03,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1880827551, now seen corresponding path program 15 times [2020-10-27 14:35:03,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:03,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871966586] [2020-10-27 14:35:03,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:03,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:03,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:03,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:08,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:08,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:35:08,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:35:08,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:35:08,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:08,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:35:08,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:35:08,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:35:08,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:08,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:08,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:08,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:08,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:08,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:08,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:35:08,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:08,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:08,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:08,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:08,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:08,496 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-27 14:35:08,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871966586] [2020-10-27 14:35:08,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:08,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:35:08,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051600026] [2020-10-27 14:35:08,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:35:08,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:08,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:35:08,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:35:08,499 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 19 states. [2020-10-27 14:35:08,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:08,924 INFO L93 Difference]: Finished difference Result 130 states and 151 transitions. [2020-10-27 14:35:08,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:35:08,925 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-27 14:35:08,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:08,926 INFO L225 Difference]: With dead ends: 130 [2020-10-27 14:35:08,926 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 14:35:08,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:35:08,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 14:35:08,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 53. [2020-10-27 14:35:08,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 14:35:08,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-27 14:35:08,943 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 47 [2020-10-27 14:35:08,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:08,943 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-27 14:35:08,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:35:08,943 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-27 14:35:08,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 14:35:08,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:08,948 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:08,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:35:08,949 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:08,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:08,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1155974626, now seen corresponding path program 16 times [2020-10-27 14:35:08,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:08,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748813034] [2020-10-27 14:35:08,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:08,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:09,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:09,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:13,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:13,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:35:13,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:35:13,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:35:13,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:13,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:35:13,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:35:13,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:35:13,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:14,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:14,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:14,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:14,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:14,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:14,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 14:35:14,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:14,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:14,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:14,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:14,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:35:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-10-27 14:35:14,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748813034] [2020-10-27 14:35:14,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:14,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:35:14,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494587158] [2020-10-27 14:35:14,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:35:14,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:14,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:35:14,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:35:14,360 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 20 states. [2020-10-27 14:35:14,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:14,925 INFO L93 Difference]: Finished difference Result 136 states and 158 transitions. [2020-10-27 14:35:14,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:35:14,926 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-10-27 14:35:14,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:14,927 INFO L225 Difference]: With dead ends: 136 [2020-10-27 14:35:14,927 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 14:35:14,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:35:14,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 14:35:14,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 55. [2020-10-27 14:35:14,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 14:35:14,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-27 14:35:14,937 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 49 [2020-10-27 14:35:14,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:14,937 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-27 14:35:14,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:35:14,937 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-27 14:35:14,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:35:14,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:14,938 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:14,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:35:14,938 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:14,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:14,939 INFO L82 PathProgramCache]: Analyzing trace with hash -236462591, now seen corresponding path program 17 times [2020-10-27 14:35:14,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:14,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042753252] [2020-10-27 14:35:14,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:14,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:15,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:19,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:19,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:35:19,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:35:19,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:35:19,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:19,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:35:19,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:35:19,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:35:19,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:20,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:20,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:20,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:20,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:20,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:20,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:35:20,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:20,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:20,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:20,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:20,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-27 14:35:20,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042753252] [2020-10-27 14:35:20,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:20,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:35:20,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960662588] [2020-10-27 14:35:20,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:35:20,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:20,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:35:20,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:35:20,323 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 21 states. [2020-10-27 14:35:20,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:20,769 INFO L93 Difference]: Finished difference Result 142 states and 165 transitions. [2020-10-27 14:35:20,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:35:20,769 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-10-27 14:35:20,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:20,771 INFO L225 Difference]: With dead ends: 142 [2020-10-27 14:35:20,771 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 14:35:20,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:35:20,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 14:35:20,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 57. [2020-10-27 14:35:20,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 14:35:20,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-27 14:35:20,787 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 51 [2020-10-27 14:35:20,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:20,787 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-27 14:35:20,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:35:20,788 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-27 14:35:20,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 14:35:20,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:20,789 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:20,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:35:20,789 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:20,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:20,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1262755394, now seen corresponding path program 18 times [2020-10-27 14:35:20,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:20,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240660456] [2020-10-27 14:35:20,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:20,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:20,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:20,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:25,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:25,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 14:35:25,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:35:25,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:35:25,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:25,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:35:25,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:35:25,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:35:25,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:26,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:26,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:26,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:26,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:26,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:26,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:35:26,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:26,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:26,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:26,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:26,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-27 14:35:26,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240660456] [2020-10-27 14:35:26,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:26,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:35:26,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449165209] [2020-10-27 14:35:26,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:35:26,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:26,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:35:26,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:35:26,153 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 22 states. [2020-10-27 14:35:26,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:26,699 INFO L93 Difference]: Finished difference Result 148 states and 172 transitions. [2020-10-27 14:35:26,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:35:26,700 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 53 [2020-10-27 14:35:26,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:26,701 INFO L225 Difference]: With dead ends: 148 [2020-10-27 14:35:26,701 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 14:35:26,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:35:26,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 14:35:26,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 59. [2020-10-27 14:35:26,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 14:35:26,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-27 14:35:26,718 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 53 [2020-10-27 14:35:26,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:26,719 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-27 14:35:26,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:35:26,720 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-27 14:35:26,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:35:26,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:26,720 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:26,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:35:26,721 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:26,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:26,721 INFO L82 PathProgramCache]: Analyzing trace with hash -563668319, now seen corresponding path program 19 times [2020-10-27 14:35:26,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:26,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663228498] [2020-10-27 14:35:26,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:26,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:26,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:31,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:31,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 14:35:31,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:35:31,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:35:31,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:31,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:35:31,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 14:35:31,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 14:35:31,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:32,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:32,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:32,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:32,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:32,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:32,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:35:32,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:32,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:32,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:32,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:32,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-10-27 14:35:32,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663228498] [2020-10-27 14:35:32,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:32,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:35:32,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367677494] [2020-10-27 14:35:32,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:35:32,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:32,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:35:32,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:35:32,130 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 23 states. [2020-10-27 14:35:32,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:32,620 INFO L93 Difference]: Finished difference Result 154 states and 179 transitions. [2020-10-27 14:35:32,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:35:32,621 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2020-10-27 14:35:32,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:32,623 INFO L225 Difference]: With dead ends: 154 [2020-10-27 14:35:32,623 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 14:35:32,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:35:32,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 14:35:32,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 61. [2020-10-27 14:35:32,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 14:35:32,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-27 14:35:32,632 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 55 [2020-10-27 14:35:32,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:32,632 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-27 14:35:32,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:35:32,632 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-27 14:35:32,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:35:32,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:32,633 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:32,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:35:32,633 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:32,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:32,634 INFO L82 PathProgramCache]: Analyzing trace with hash 262127266, now seen corresponding path program 20 times [2020-10-27 14:35:32,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:32,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185551071] [2020-10-27 14:35:32,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:32,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:32,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:37,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:37,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:35:37,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:35:37,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:35:37,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:37,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:35:37,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:35:37,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:35:37,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:38,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:38,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:38,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:38,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:38,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:38,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:35:38,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:38,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:38,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:38,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:38,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-27 14:35:38,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185551071] [2020-10-27 14:35:38,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:38,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:35:38,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872927046] [2020-10-27 14:35:38,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:35:38,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:38,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:35:38,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:35:38,085 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 24 states. [2020-10-27 14:35:38,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:38,634 INFO L93 Difference]: Finished difference Result 160 states and 186 transitions. [2020-10-27 14:35:38,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:35:38,637 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2020-10-27 14:35:38,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:38,638 INFO L225 Difference]: With dead ends: 160 [2020-10-27 14:35:38,638 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 14:35:38,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:35:38,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 14:35:38,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 63. [2020-10-27 14:35:38,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 14:35:38,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-27 14:35:38,647 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 57 [2020-10-27 14:35:38,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:38,647 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-27 14:35:38,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:35:38,647 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-27 14:35:38,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:35:38,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:38,651 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:38,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:35:38,651 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:38,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:38,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1455722305, now seen corresponding path program 21 times [2020-10-27 14:35:38,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:38,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314987226] [2020-10-27 14:35:38,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:38,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:38,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:43,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:43,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 14:35:43,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:35:43,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:35:43,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:43,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:35:43,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 14:35:43,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:35:43,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:44,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:44,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:44,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:44,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:44,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:44,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:35:44,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:44,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:44,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:44,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:44,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-10-27 14:35:44,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314987226] [2020-10-27 14:35:44,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:44,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:35:44,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100878213] [2020-10-27 14:35:44,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:35:44,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:44,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:35:44,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:35:44,156 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 25 states. [2020-10-27 14:35:44,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:44,728 INFO L93 Difference]: Finished difference Result 166 states and 193 transitions. [2020-10-27 14:35:44,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:35:44,730 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-10-27 14:35:44,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:44,732 INFO L225 Difference]: With dead ends: 166 [2020-10-27 14:35:44,732 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 14:35:44,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:35:44,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 14:35:44,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 65. [2020-10-27 14:35:44,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 14:35:44,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-27 14:35:44,740 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 59 [2020-10-27 14:35:44,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:44,740 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-27 14:35:44,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:35:44,740 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-27 14:35:44,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 14:35:44,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:44,741 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:44,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:35:44,741 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:44,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:44,742 INFO L82 PathProgramCache]: Analyzing trace with hash 387426050, now seen corresponding path program 22 times [2020-10-27 14:35:44,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:44,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690090930] [2020-10-27 14:35:44,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:44,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:44,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:49,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:49,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:35:49,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:35:49,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 14:35:49,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:49,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:35:49,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 14:35:49,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:35:49,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:50,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:50,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:50,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:50,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:50,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:50,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:35:50,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:50,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:50,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:50,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:50,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-10-27 14:35:50,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690090930] [2020-10-27 14:35:50,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:50,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:35:50,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045601526] [2020-10-27 14:35:50,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:35:50,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:50,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:35:50,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:35:50,289 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 26 states. [2020-10-27 14:35:50,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:50,907 INFO L93 Difference]: Finished difference Result 172 states and 200 transitions. [2020-10-27 14:35:50,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:35:50,908 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 61 [2020-10-27 14:35:50,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:50,909 INFO L225 Difference]: With dead ends: 172 [2020-10-27 14:35:50,910 INFO L226 Difference]: Without dead ends: 136 [2020-10-27 14:35:50,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:35:50,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-27 14:35:50,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 67. [2020-10-27 14:35:50,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 14:35:50,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-27 14:35:50,917 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 61 [2020-10-27 14:35:50,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:50,918 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-27 14:35:50,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:35:50,918 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-27 14:35:50,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:35:50,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:50,919 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:50,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:35:50,919 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:50,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:50,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1138899937, now seen corresponding path program 23 times [2020-10-27 14:35:50,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:50,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492510079] [2020-10-27 14:35:50,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:50,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:51,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:55,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:55,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:35:55,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:35:55,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:35:55,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:55,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:35:55,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 14:35:55,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 14:35:55,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:56,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:56,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:56,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:56,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:56,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:56,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:35:56,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:56,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:56,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:56,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:56,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-10-27 14:35:56,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492510079] [2020-10-27 14:35:56,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:56,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:35:56,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167455784] [2020-10-27 14:35:56,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:35:56,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:56,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:35:56,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:35:56,478 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 27 states. [2020-10-27 14:35:57,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:57,103 INFO L93 Difference]: Finished difference Result 178 states and 207 transitions. [2020-10-27 14:35:57,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:35:57,104 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 63 [2020-10-27 14:35:57,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:57,106 INFO L225 Difference]: With dead ends: 178 [2020-10-27 14:35:57,106 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 14:35:57,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:35:57,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 14:35:57,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 69. [2020-10-27 14:35:57,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 14:35:57,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-27 14:35:57,114 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 63 [2020-10-27 14:35:57,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:57,114 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-27 14:35:57,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:35:57,114 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-27 14:35:57,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 14:35:57,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:57,115 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:57,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:35:57,115 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:57,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:57,116 INFO L82 PathProgramCache]: Analyzing trace with hash -817244318, now seen corresponding path program 24 times [2020-10-27 14:35:57,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:57,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069713931] [2020-10-27 14:35:57,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:57,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:57,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:02,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:02,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 14:36:02,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:02,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:36:02,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:02,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:36:02,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 14:36:02,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:36:02,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:02,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:02,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:02,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:02,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:02,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:02,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:36:02,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:02,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:02,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:02,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:02,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-27 14:36:02,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069713931] [2020-10-27 14:36:02,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:02,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:36:02,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501414107] [2020-10-27 14:36:02,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:36:02,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:02,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:36:02,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:36:02,739 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 28 states. [2020-10-27 14:36:03,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:03,512 INFO L93 Difference]: Finished difference Result 184 states and 214 transitions. [2020-10-27 14:36:03,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:36:03,513 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 65 [2020-10-27 14:36:03,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:03,515 INFO L225 Difference]: With dead ends: 184 [2020-10-27 14:36:03,515 INFO L226 Difference]: Without dead ends: 146 [2020-10-27 14:36:03,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:36:03,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-27 14:36:03,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 71. [2020-10-27 14:36:03,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 14:36:03,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-27 14:36:03,534 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 65 [2020-10-27 14:36:03,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:03,535 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-27 14:36:03,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:36:03,536 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-27 14:36:03,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 14:36:03,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:03,536 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:03,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:36:03,537 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:03,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:03,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1776148351, now seen corresponding path program 25 times [2020-10-27 14:36:03,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:03,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600544903] [2020-10-27 14:36:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:03,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:03,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:08,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:08,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:36:08,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:08,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:36:08,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:08,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:36:08,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-27 14:36:08,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:36:08,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:09,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:09,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:09,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:09,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:09,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:09,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:36:09,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:09,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:09,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:09,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:09,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-10-27 14:36:09,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600544903] [2020-10-27 14:36:09,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:09,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:36:09,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066418003] [2020-10-27 14:36:09,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:36:09,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:09,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:36:09,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:36:09,207 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 29 states. [2020-10-27 14:36:09,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:09,823 INFO L93 Difference]: Finished difference Result 190 states and 221 transitions. [2020-10-27 14:36:09,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:36:09,824 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 67 [2020-10-27 14:36:09,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:09,825 INFO L225 Difference]: With dead ends: 190 [2020-10-27 14:36:09,825 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 14:36:09,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:36:09,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 14:36:09,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 73. [2020-10-27 14:36:09,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 14:36:09,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-27 14:36:09,837 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 67 [2020-10-27 14:36:09,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:09,837 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-27 14:36:09,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:36:09,838 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-27 14:36:09,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 14:36:09,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:09,838 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:09,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:36:09,839 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:09,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:09,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1851019202, now seen corresponding path program 26 times [2020-10-27 14:36:09,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:09,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613761549] [2020-10-27 14:36:09,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:09,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:10,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:14,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:14,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 14:36:14,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:14,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 14:36:14,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:14,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:36:14,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:36:14,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:36:14,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:15,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:15,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:15,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:15,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:15,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:15,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:15,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:36:15,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:15,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:15,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:15,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:15,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:15,553 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-10-27 14:36:15,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613761549] [2020-10-27 14:36:15,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:15,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:36:15,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832899338] [2020-10-27 14:36:15,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:36:15,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:15,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:36:15,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:36:15,556 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 30 states. [2020-10-27 14:36:16,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:16,217 INFO L93 Difference]: Finished difference Result 196 states and 228 transitions. [2020-10-27 14:36:16,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:36:16,218 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2020-10-27 14:36:16,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:16,219 INFO L225 Difference]: With dead ends: 196 [2020-10-27 14:36:16,219 INFO L226 Difference]: Without dead ends: 156 [2020-10-27 14:36:16,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:36:16,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-27 14:36:16,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 75. [2020-10-27 14:36:16,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 14:36:16,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-27 14:36:16,227 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 69 [2020-10-27 14:36:16,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:16,228 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-27 14:36:16,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:36:16,228 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-27 14:36:16,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 14:36:16,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:16,228 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:16,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:36:16,229 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:16,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:16,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1701199137, now seen corresponding path program 27 times [2020-10-27 14:36:16,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:16,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063191444] [2020-10-27 14:36:16,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:16,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:16,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:21,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:21,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 14:36:21,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:21,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 14:36:21,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:21,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:36:21,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-27 14:36:21,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:36:21,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:22,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:22,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:22,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:22,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:22,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:22,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:36:22,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:22,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:22,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:22,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:22,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-10-27 14:36:22,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063191444] [2020-10-27 14:36:22,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:22,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:36:22,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027771260] [2020-10-27 14:36:22,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:36:22,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:22,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:36:22,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:36:22,033 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 31 states. [2020-10-27 14:36:22,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:22,783 INFO L93 Difference]: Finished difference Result 202 states and 235 transitions. [2020-10-27 14:36:22,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:36:22,783 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 71 [2020-10-27 14:36:22,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:22,785 INFO L225 Difference]: With dead ends: 202 [2020-10-27 14:36:22,785 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 14:36:22,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:36:22,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 14:36:22,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 77. [2020-10-27 14:36:22,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 14:36:22,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-27 14:36:22,794 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 71 [2020-10-27 14:36:22,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:22,794 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-27 14:36:22,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:36:22,794 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-27 14:36:22,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 14:36:22,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:22,795 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:22,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:36:22,795 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:22,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:22,796 INFO L82 PathProgramCache]: Analyzing trace with hash -757788638, now seen corresponding path program 28 times [2020-10-27 14:36:22,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:22,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450258058] [2020-10-27 14:36:22,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:22,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:23,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:27,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:27,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 14:36:27,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:27,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:36:27,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:27,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:36:27,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:36:27,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:36:27,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:28,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:28,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:28,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:28,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:28,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:28,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:36:28,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:28,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:28,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:28,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:28,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2020-10-27 14:36:28,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450258058] [2020-10-27 14:36:28,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:28,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:36:28,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518906205] [2020-10-27 14:36:28,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:36:28,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:28,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:36:28,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:36:28,562 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 32 states. [2020-10-27 14:36:29,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:29,492 INFO L93 Difference]: Finished difference Result 208 states and 242 transitions. [2020-10-27 14:36:29,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:36:29,493 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 73 [2020-10-27 14:36:29,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:29,494 INFO L225 Difference]: With dead ends: 208 [2020-10-27 14:36:29,494 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 14:36:29,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:36:29,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 14:36:29,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 79. [2020-10-27 14:36:29,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 14:36:29,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-27 14:36:29,503 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 73 [2020-10-27 14:36:29,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:29,503 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-27 14:36:29,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:36:29,503 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-27 14:36:29,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 14:36:29,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:29,504 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:29,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:36:29,505 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:29,505 INFO L82 PathProgramCache]: Analyzing trace with hash 286298561, now seen corresponding path program 29 times [2020-10-27 14:36:29,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:29,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646942354] [2020-10-27 14:36:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:29,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:29,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:34,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:34,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 14:36:34,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:34,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 14:36:34,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:34,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:36:34,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-27 14:36:34,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 14:36:34,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:35,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:35,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:35,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:35,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:35,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:35,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:36:35,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:35,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:35,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:35,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:35,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2020-10-27 14:36:35,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646942354] [2020-10-27 14:36:35,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:35,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:36:35,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547321556] [2020-10-27 14:36:35,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:36:35,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:35,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:36:35,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:36:35,298 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 33 states. [2020-10-27 14:36:36,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:36,057 INFO L93 Difference]: Finished difference Result 214 states and 249 transitions. [2020-10-27 14:36:36,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:36:36,058 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 75 [2020-10-27 14:36:36,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:36,059 INFO L225 Difference]: With dead ends: 214 [2020-10-27 14:36:36,059 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 14:36:36,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:36:36,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 14:36:36,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 81. [2020-10-27 14:36:36,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 14:36:36,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-27 14:36:36,067 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 75 [2020-10-27 14:36:36,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:36,068 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-27 14:36:36,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:36:36,068 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-27 14:36:36,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 14:36:36,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:36,069 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:36,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:36:36,069 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:36,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:36,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1676286082, now seen corresponding path program 30 times [2020-10-27 14:36:36,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:36,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48932624] [2020-10-27 14:36:36,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:36,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:36,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:36,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:41,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:41,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 14:36:41,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:41,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:36:41,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:41,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:36:41,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:36:41,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:36:41,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:41,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:41,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:41,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:41,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:41,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:41,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:36:41,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:41,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:41,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:41,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:41,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2020-10-27 14:36:41,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48932624] [2020-10-27 14:36:41,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:41,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:36:41,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732777637] [2020-10-27 14:36:41,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:36:41,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:41,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:36:41,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:36:41,928 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 34 states. [2020-10-27 14:36:42,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:42,742 INFO L93 Difference]: Finished difference Result 220 states and 256 transitions. [2020-10-27 14:36:42,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:36:42,743 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 77 [2020-10-27 14:36:42,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:42,745 INFO L225 Difference]: With dead ends: 220 [2020-10-27 14:36:42,746 INFO L226 Difference]: Without dead ends: 176 [2020-10-27 14:36:42,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:36:42,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-27 14:36:42,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 83. [2020-10-27 14:36:42,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 14:36:42,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-27 14:36:42,754 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 77 [2020-10-27 14:36:42,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:42,755 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-27 14:36:42,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:36:42,755 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-27 14:36:42,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 14:36:42,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:42,756 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:42,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:36:42,756 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:42,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:42,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1610817121, now seen corresponding path program 31 times [2020-10-27 14:36:42,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:42,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055757583] [2020-10-27 14:36:42,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:42,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:43,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:47,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:47,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 14:36:47,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:47,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:36:47,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:47,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:36:47,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-27 14:36:47,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:36:47,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:48,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:48,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:48,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:48,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:48,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:48,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:48,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:36:48,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:48,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:48,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:48,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:48,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-10-27 14:36:48,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055757583] [2020-10-27 14:36:48,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:48,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:36:48,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544789994] [2020-10-27 14:36:48,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:36:48,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:48,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:36:48,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:36:48,692 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 35 states. [2020-10-27 14:36:49,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:49,518 INFO L93 Difference]: Finished difference Result 226 states and 263 transitions. [2020-10-27 14:36:49,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:36:49,522 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 79 [2020-10-27 14:36:49,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:49,523 INFO L225 Difference]: With dead ends: 226 [2020-10-27 14:36:49,523 INFO L226 Difference]: Without dead ends: 181 [2020-10-27 14:36:49,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:36:49,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-27 14:36:49,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 85. [2020-10-27 14:36:49,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 14:36:49,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-27 14:36:49,532 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 79 [2020-10-27 14:36:49,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:49,532 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-27 14:36:49,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:36:49,532 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-27 14:36:49,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 14:36:49,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:49,533 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:49,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:36:49,533 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:49,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:49,534 INFO L82 PathProgramCache]: Analyzing trace with hash -248420126, now seen corresponding path program 32 times [2020-10-27 14:36:49,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:49,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021912774] [2020-10-27 14:36:49,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:49,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:49,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:54,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:54,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 14:36:54,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:54,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 14:36:54,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:54,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:36:54,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 14:36:54,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:36:54,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:55,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:55,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:55,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:55,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:55,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:55,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:36:55,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:55,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:55,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:55,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:55,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-10-27 14:36:55,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021912774] [2020-10-27 14:36:55,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:55,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 14:36:55,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753776957] [2020-10-27 14:36:55,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 14:36:55,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:55,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 14:36:55,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:36:55,488 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 36 states. [2020-10-27 14:36:56,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:56,601 INFO L93 Difference]: Finished difference Result 232 states and 270 transitions. [2020-10-27 14:36:56,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:36:56,602 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 81 [2020-10-27 14:36:56,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:56,603 INFO L225 Difference]: With dead ends: 232 [2020-10-27 14:36:56,603 INFO L226 Difference]: Without dead ends: 186 [2020-10-27 14:36:56,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:36:56,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-27 14:36:56,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 87. [2020-10-27 14:36:56,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 14:36:56,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-27 14:36:56,611 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 81 [2020-10-27 14:36:56,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:56,612 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-27 14:36:56,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 14:36:56,612 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-27 14:36:56,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 14:36:56,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:56,613 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:56,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:36:56,613 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:56,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:56,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1600134399, now seen corresponding path program 33 times [2020-10-27 14:36:56,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:56,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945312285] [2020-10-27 14:36:56,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:56,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:57,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:01,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:01,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 14:37:01,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:37:01,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:37:01,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:01,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:37:01,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 14:37:01,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:37:01,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:02,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:02,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:02,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:02,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:02,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:02,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:37:02,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:02,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:02,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:02,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:02,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2020-10-27 14:37:02,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945312285] [2020-10-27 14:37:02,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:02,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:37:02,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433803970] [2020-10-27 14:37:02,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:37:02,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:02,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:37:02,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:37:02,592 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 37 states. [2020-10-27 14:37:03,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:03,510 INFO L93 Difference]: Finished difference Result 238 states and 277 transitions. [2020-10-27 14:37:03,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:37:03,511 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 83 [2020-10-27 14:37:03,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:03,514 INFO L225 Difference]: With dead ends: 238 [2020-10-27 14:37:03,515 INFO L226 Difference]: Without dead ends: 191 [2020-10-27 14:37:03,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:37:03,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-27 14:37:03,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 89. [2020-10-27 14:37:03,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 14:37:03,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-27 14:37:03,524 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 83 [2020-10-27 14:37:03,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:03,525 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-27 14:37:03,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 14:37:03,525 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-27 14:37:03,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 14:37:03,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:03,526 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:03,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:37:03,526 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:03,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:03,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1832320702, now seen corresponding path program 34 times [2020-10-27 14:37:03,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:03,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158437412] [2020-10-27 14:37:03,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:03,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:03,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:08,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:08,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 14:37:08,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:37:08,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-27 14:37:08,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:08,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 14:37:08,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 14:37:08,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:37:08,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:09,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:09,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:09,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:09,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:09,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:09,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:37:09,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:09,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:09,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:09,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:09,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-10-27 14:37:09,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158437412] [2020-10-27 14:37:09,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:09,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 14:37:09,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242093354] [2020-10-27 14:37:09,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 14:37:09,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:09,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 14:37:09,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:37:09,588 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 38 states. [2020-10-27 14:37:10,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:10,511 INFO L93 Difference]: Finished difference Result 244 states and 284 transitions. [2020-10-27 14:37:10,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:37:10,512 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 85 [2020-10-27 14:37:10,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:10,514 INFO L225 Difference]: With dead ends: 244 [2020-10-27 14:37:10,514 INFO L226 Difference]: Without dead ends: 196 [2020-10-27 14:37:10,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:37:10,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-27 14:37:10,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 91. [2020-10-27 14:37:10,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 14:37:10,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-10-27 14:37:10,522 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 85 [2020-10-27 14:37:10,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:10,522 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-10-27 14:37:10,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 14:37:10,522 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-10-27 14:37:10,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 14:37:10,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:10,523 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:10,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:37:10,523 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:10,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:10,524 INFO L82 PathProgramCache]: Analyzing trace with hash -926359647, now seen corresponding path program 35 times [2020-10-27 14:37:10,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:10,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673639313] [2020-10-27 14:37:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:10,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:10,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:15,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:15,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 14:37:15,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:37:15,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:37:15,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:15,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 14:37:15,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-27 14:37:15,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 14:37:15,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:16,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:16,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:16,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:16,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:16,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:16,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:37:16,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:16,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:16,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:16,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:16,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:16,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-10-27 14:37:16,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673639313] [2020-10-27 14:37:16,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:16,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 14:37:16,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217951474] [2020-10-27 14:37:16,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 14:37:16,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:16,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 14:37:16,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:37:16,661 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 39 states. [2020-10-27 14:37:17,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:17,592 INFO L93 Difference]: Finished difference Result 250 states and 291 transitions. [2020-10-27 14:37:17,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 14:37:17,592 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 87 [2020-10-27 14:37:17,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:17,594 INFO L225 Difference]: With dead ends: 250 [2020-10-27 14:37:17,594 INFO L226 Difference]: Without dead ends: 201 [2020-10-27 14:37:17,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:37:17,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-27 14:37:17,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 93. [2020-10-27 14:37:17,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 14:37:17,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-10-27 14:37:17,603 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 87 [2020-10-27 14:37:17,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:17,603 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-10-27 14:37:17,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 14:37:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-10-27 14:37:17,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 14:37:17,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:17,604 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:17,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:37:17,605 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:17,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:17,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1991319134, now seen corresponding path program 36 times [2020-10-27 14:37:17,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:17,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042380250] [2020-10-27 14:37:17,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:17,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:18,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:22,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:22,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 14:37:22,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:37:22,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 14:37:22,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:22,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 14:37:22,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 14:37:22,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:37:22,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:23,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:23,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:23,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:23,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:23,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:23,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:37:23,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:23,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:23,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:23,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:23,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2020-10-27 14:37:23,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042380250] [2020-10-27 14:37:23,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:23,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 14:37:23,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170779388] [2020-10-27 14:37:23,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 14:37:23,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:23,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 14:37:23,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:37:23,754 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 40 states. [2020-10-27 14:37:25,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:25,057 INFO L93 Difference]: Finished difference Result 256 states and 298 transitions. [2020-10-27 14:37:25,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 14:37:25,058 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 89 [2020-10-27 14:37:25,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:25,060 INFO L225 Difference]: With dead ends: 256 [2020-10-27 14:37:25,060 INFO L226 Difference]: Without dead ends: 206 [2020-10-27 14:37:25,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:37:25,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-27 14:37:25,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 95. [2020-10-27 14:37:25,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 14:37:25,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-10-27 14:37:25,070 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 89 [2020-10-27 14:37:25,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:25,070 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-10-27 14:37:25,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 14:37:25,070 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-10-27 14:37:25,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 14:37:25,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:25,071 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:25,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 14:37:25,072 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:25,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:25,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1780476863, now seen corresponding path program 37 times [2020-10-27 14:37:25,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:25,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379010901] [2020-10-27 14:37:25,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:25,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:25,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:30,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:30,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 14:37:30,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:37:30,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 14:37:30,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:30,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 14:37:30,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-27 14:37:30,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 14:37:30,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:31,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:31,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:31,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:31,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:31,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:31,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:37:31,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:31,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:31,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:31,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:31,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2020-10-27 14:37:31,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379010901] [2020-10-27 14:37:31,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:31,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 14:37:31,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962815515] [2020-10-27 14:37:31,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 14:37:31,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:31,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 14:37:31,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:37:31,319 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 41 states. [2020-10-27 14:37:32,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:32,395 INFO L93 Difference]: Finished difference Result 262 states and 305 transitions. [2020-10-27 14:37:32,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 14:37:32,395 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 91 [2020-10-27 14:37:32,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:32,397 INFO L225 Difference]: With dead ends: 262 [2020-10-27 14:37:32,397 INFO L226 Difference]: Without dead ends: 211 [2020-10-27 14:37:32,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:37:32,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-27 14:37:32,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 97. [2020-10-27 14:37:32,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 14:37:32,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2020-10-27 14:37:32,404 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 91 [2020-10-27 14:37:32,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:32,404 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2020-10-27 14:37:32,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 14:37:32,404 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2020-10-27 14:37:32,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 14:37:32,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:32,405 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:32,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 14:37:32,406 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:32,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:32,406 INFO L82 PathProgramCache]: Analyzing trace with hash 501287426, now seen corresponding path program 38 times [2020-10-27 14:37:32,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:32,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833037514] [2020-10-27 14:37:32,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:32,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:32,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:37,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:37,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 14:37:37,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:37:37,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:37:37,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:37,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 14:37:37,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 14:37:37,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:37:37,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:38,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:38,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:38,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:38,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:38,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:38,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:37:38,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:38,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:38,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:38,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:38,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2020-10-27 14:37:38,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833037514] [2020-10-27 14:37:38,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:38,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 14:37:38,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115467529] [2020-10-27 14:37:38,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 14:37:38,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:38,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 14:37:38,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:37:38,637 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 42 states. [2020-10-27 14:37:39,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:39,694 INFO L93 Difference]: Finished difference Result 268 states and 312 transitions. [2020-10-27 14:37:39,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 14:37:39,695 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 93 [2020-10-27 14:37:39,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:39,697 INFO L225 Difference]: With dead ends: 268 [2020-10-27 14:37:39,697 INFO L226 Difference]: Without dead ends: 216 [2020-10-27 14:37:39,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:37:39,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-27 14:37:39,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 99. [2020-10-27 14:37:39,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 14:37:39,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-10-27 14:37:39,705 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 93 [2020-10-27 14:37:39,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:39,706 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-10-27 14:37:39,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 14:37:39,706 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-10-27 14:37:39,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 14:37:39,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:39,707 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:39,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 14:37:39,707 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:39,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:39,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1396211487, now seen corresponding path program 39 times [2020-10-27 14:37:39,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:39,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779780684] [2020-10-27 14:37:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:39,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:40,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:44,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:44,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 14:37:44,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:37:44,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 14:37:44,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:44,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 14:37:44,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-27 14:37:44,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 14:37:44,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:46,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:46,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:46,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:46,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:46,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:46,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:37:46,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:46,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:46,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:46,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:46,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:46,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-27 14:37:46,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779780684] [2020-10-27 14:37:46,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:46,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 14:37:46,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274741035] [2020-10-27 14:37:46,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 14:37:46,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:46,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 14:37:46,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:37:46,036 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 43 states. [2020-10-27 14:37:47,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:47,232 INFO L93 Difference]: Finished difference Result 274 states and 319 transitions. [2020-10-27 14:37:47,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 14:37:47,233 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 95 [2020-10-27 14:37:47,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:47,235 INFO L225 Difference]: With dead ends: 274 [2020-10-27 14:37:47,236 INFO L226 Difference]: Without dead ends: 221 [2020-10-27 14:37:47,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:37:47,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-27 14:37:47,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 101. [2020-10-27 14:37:47,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 14:37:47,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2020-10-27 14:37:47,244 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 95 [2020-10-27 14:37:47,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:47,244 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2020-10-27 14:37:47,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 14:37:47,244 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2020-10-27 14:37:47,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 14:37:47,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:47,245 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:47,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 14:37:47,245 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:47,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:47,246 INFO L82 PathProgramCache]: Analyzing trace with hash -2111997342, now seen corresponding path program 40 times [2020-10-27 14:37:47,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:47,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574400649] [2020-10-27 14:37:47,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:47,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:47,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking...