/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block 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=NARROWEST --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 -i ../../../trunk/examples/svcomp/loop-acceleration/diamond_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:43:00,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:43:00,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:43:00,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:43:00,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:43:00,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:43:00,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:43:00,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:43:00,467 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:43:00,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:43:00,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:43:00,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:43:00,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:43:00,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:43:00,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:43:00,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:43:00,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:43:00,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:43:00,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:43:00,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:43:00,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:43:00,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:43:00,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:43:00,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:43:00,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:43:00,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:43:00,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:43:00,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:43:00,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:43:00,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:43:00,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:43:00,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:43:00,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:43:00,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:43:00,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:43:00,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:43:00,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:43:00,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:43:00,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:43:00,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:43:00,528 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:43:00,529 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 [2020-10-13 10:43:00,581 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:43:00,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:43:00,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:43:00,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:43:00,587 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:43:00,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:43:00,587 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:43:00,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:43:00,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:43:00,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:43:00,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:43:00,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:43:00,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:43:00,589 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:43:00,589 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:43:00,590 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:43:00,590 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:43:00,590 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:43:00,590 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:43:00,590 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:43:00,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:43:00,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:43:00,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:43:00,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:43:00,592 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:43:00,592 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:43:00,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:43:00,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:43:00,593 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:43:00,593 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> 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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:43:00,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:43:00,926 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:43:00,929 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:43:00,931 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:43:00,931 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:43:00,932 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_1-1.c [2020-10-13 10:43:01,000 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a49f87800/87f0d1480d7548eca676971a98cde943/FLAG68bb2d47c [2020-10-13 10:43:01,464 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:43:01,465 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/diamond_1-1.c [2020-10-13 10:43:01,471 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a49f87800/87f0d1480d7548eca676971a98cde943/FLAG68bb2d47c [2020-10-13 10:43:01,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a49f87800/87f0d1480d7548eca676971a98cde943 [2020-10-13 10:43:01,832 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:43:01,834 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:43:01,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:43:01,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:43:01,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:43:01,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:43:01" (1/1) ... [2020-10-13 10:43:01,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@249e641f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:43:01, skipping insertion in model container [2020-10-13 10:43:01,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:43:01" (1/1) ... [2020-10-13 10:43:01,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:43:01,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:43:02,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:43:02,035 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:43:02,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:43:02,069 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:43:02,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:43:02 WrapperNode [2020-10-13 10:43:02,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:43:02,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:43:02,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:43:02,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:43:02,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:43:02" (1/1) ... [2020-10-13 10:43:02,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:43:02" (1/1) ... [2020-10-13 10:43:02,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:43:02" (1/1) ... [2020-10-13 10:43:02,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:43:02" (1/1) ... [2020-10-13 10:43:02,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:43:02" (1/1) ... [2020-10-13 10:43:02,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:43:02" (1/1) ... [2020-10-13 10:43:02,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:43:02" (1/1) ... [2020-10-13 10:43:02,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:43:02,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:43:02,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:43:02,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:43:02,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:43:02" (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 [2020-10-13 10:43:02,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:43:02,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:43:02,256 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:43:02,256 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:43:02,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:43:02,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-13 10:43:02,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:43:02,257 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:43:02,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:43:02,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:43:02,450 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:43:02,450 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:43:02,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:43:02 BoogieIcfgContainer [2020-10-13 10:43:02,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:43:02,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:43:02,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:43:02,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:43:02,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:43:01" (1/3) ... [2020-10-13 10:43:02,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb55d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:43:02, skipping insertion in model container [2020-10-13 10:43:02,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:43:02" (2/3) ... [2020-10-13 10:43:02,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb55d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:43:02, skipping insertion in model container [2020-10-13 10:43:02,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:43:02" (3/3) ... [2020-10-13 10:43:02,461 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_1-1.c [2020-10-13 10:43:02,472 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:43:02,480 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:43:02,496 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:43:02,522 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:43:02,522 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:43:02,522 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:43:02,523 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:43:02,523 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:43:02,523 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:43:02,523 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:43:02,523 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:43:02,541 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-13 10:43:02,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:43:02,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:02,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:02,549 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:02,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:02,554 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-10-13 10:43:02,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:02,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13781535] [2020-10-13 10:43:02,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:02,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:02,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:02,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:43:02,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:02,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-13 10:43:02,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:02,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:02,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:02,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:02,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:43:02,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:02,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:02,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:02,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:02,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:02,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:43:02,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:02,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:02,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:02,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:02,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:02,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13781535] [2020-10-13 10:43:02,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:43:02,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-13 10:43:02,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818085836] [2020-10-13 10:43:02,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-13 10:43:02,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:02,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-13 10:43:02,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:43:02,811 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-10-13 10:43:02,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:02,835 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-10-13 10:43:02,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-13 10:43:02,836 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-13 10:43:02,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:02,843 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:43:02,843 INFO L226 Difference]: Without dead ends: 12 [2020-10-13 10:43:02,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:43:02,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-13 10:43:02,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-13 10:43:02,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-13 10:43:02,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-13 10:43:02,880 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2020-10-13 10:43:02,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:02,881 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-13 10:43:02,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-13 10:43:02,881 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-10-13 10:43:02,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:43:02,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:02,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:02,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:43:02,883 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:02,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:02,883 INFO L82 PathProgramCache]: Analyzing trace with hash -730736584, now seen corresponding path program 1 times [2020-10-13 10:43:02,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:02,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772255262] [2020-10-13 10:43:02,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:02,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:03,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:03,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:43:03,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:03,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-13 10:43:03,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:03,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:43:03,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:03,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:43:03,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:03,392 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2020-10-13 10:43:03,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:03,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:03,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:03,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:03,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:03,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:03,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 10:43:03,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:03,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:03,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:03,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:03,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:03,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772255262] [2020-10-13 10:43:03,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:43:03,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:43:03,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691976532] [2020-10-13 10:43:03,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:43:03,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:03,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:43:03,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:43:03,422 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2020-10-13 10:43:03,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:03,462 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2020-10-13 10:43:03,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:43:03,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-13 10:43:03,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:03,466 INFO L225 Difference]: With dead ends: 19 [2020-10-13 10:43:03,466 INFO L226 Difference]: Without dead ends: 14 [2020-10-13 10:43:03,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:43:03,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-13 10:43:03,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-10-13 10:43:03,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-13 10:43:03,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-13 10:43:03,473 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-10-13 10:43:03,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:03,474 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-13 10:43:03,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:43:03,474 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-13 10:43:03,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:43:03,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:03,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:03,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:43:03,476 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:03,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:03,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1082855947, now seen corresponding path program 1 times [2020-10-13 10:43:03,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:03,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441721028] [2020-10-13 10:43:03,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:03,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:03,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:03,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:03,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:43:03,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:03,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-10-13 10:43:03,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:03,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:43:03,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:03,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:43:03,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:03,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:03,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:03,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:03,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:03,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:03,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:03,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:03,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:03,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:03,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:03,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:03,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441721028] [2020-10-13 10:43:03,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:03,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:43:03,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718815590] [2020-10-13 10:43:03,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:43:03,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:03,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:43:03,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:43:03,919 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2020-10-13 10:43:03,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:03,968 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-10-13 10:43:03,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:43:03,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-13 10:43:03,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:03,970 INFO L225 Difference]: With dead ends: 21 [2020-10-13 10:43:03,971 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:43:03,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:43:03,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:43:03,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-13 10:43:03,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 10:43:03,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-10-13 10:43:03,981 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2020-10-13 10:43:03,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:03,982 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-13 10:43:03,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:43:03,982 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-10-13 10:43:03,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:43:03,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:03,983 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:03,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:43:03,983 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:03,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:03,984 INFO L82 PathProgramCache]: Analyzing trace with hash -167147406, now seen corresponding path program 2 times [2020-10-13 10:43:03,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:03,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489519000] [2020-10-13 10:43:03,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:04,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:04,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:04,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:04,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:43:04,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:04,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-13 10:43:04,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:04,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:43:04,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:04,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:43:04,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 10:43:04,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:04,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:04,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:04,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:04,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:04,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:43:04,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:04,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:04,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:04,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:04,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:04,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489519000] [2020-10-13 10:43:04,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:04,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:43:04,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239033959] [2020-10-13 10:43:04,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:43:04,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:04,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:43:04,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:43:04,379 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2020-10-13 10:43:04,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:04,438 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-10-13 10:43:04,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:43:04,440 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-13 10:43:04,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:04,441 INFO L225 Difference]: With dead ends: 24 [2020-10-13 10:43:04,441 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 10:43:04,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:43:04,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 10:43:04,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-10-13 10:43:04,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 10:43:04,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-10-13 10:43:04,451 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2020-10-13 10:43:04,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:04,451 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-10-13 10:43:04,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:43:04,451 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-10-13 10:43:04,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:43:04,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:04,456 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:04,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:43:04,456 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:04,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:04,456 INFO L82 PathProgramCache]: Analyzing trace with hash -976494032, now seen corresponding path program 1 times [2020-10-13 10:43:04,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:04,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324599817] [2020-10-13 10:43:04,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:04,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:04,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:04,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:43:04,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:04,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-13 10:43:04,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:04,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:43:04,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:43:04,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:43:04,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:08,581 WARN L193 SmtUtils]: Spent 3.98 s on a formula simplification. DAG size of input: 60 DAG size of output: 12 [2020-10-13 10:43:08,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:08,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:08,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:08,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:08,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:08,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:08,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:08,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:08,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:08,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:08,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:08,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:08,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324599817] [2020-10-13 10:43:08,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:43:08,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:43:08,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289049954] [2020-10-13 10:43:08,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:43:08,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:08,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:43:08,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:43:08,591 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2020-10-13 10:43:08,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:08,605 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-10-13 10:43:08,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:43:08,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-13 10:43:08,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:08,608 INFO L225 Difference]: With dead ends: 28 [2020-10-13 10:43:08,608 INFO L226 Difference]: Without dead ends: 21 [2020-10-13 10:43:08,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:43:08,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-13 10:43:08,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-13 10:43:08,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 10:43:08,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-10-13 10:43:08,616 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2020-10-13 10:43:08,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:08,616 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-10-13 10:43:08,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:43:08,616 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-10-13 10:43:08,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:43:08,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:08,617 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:08,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:43:08,618 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:08,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:08,618 INFO L82 PathProgramCache]: Analyzing trace with hash -919235730, now seen corresponding path program 1 times [2020-10-13 10:43:08,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:08,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853864432] [2020-10-13 10:43:08,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:08,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:08,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:08,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:08,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:43:08,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:08,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-13 10:43:08,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:08,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:43:08,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:08,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:43:08,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:08,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:08,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:08,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:08,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:08,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:08,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:08,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:08,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:08,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:08,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:08,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:08,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:08,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853864432] [2020-10-13 10:43:08,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:08,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:43:08,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925773447] [2020-10-13 10:43:08,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:43:08,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:08,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:43:08,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:43:08,992 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 5 states. [2020-10-13 10:43:09,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:09,035 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-10-13 10:43:09,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:43:09,036 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-13 10:43:09,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:09,036 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:43:09,037 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 10:43:09,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:43:09,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 10:43:09,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-10-13 10:43:09,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 10:43:09,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-10-13 10:43:09,043 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-10-13 10:43:09,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:09,044 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-10-13 10:43:09,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:43:09,044 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-10-13 10:43:09,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:43:09,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:09,045 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:09,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:43:09,045 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:09,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:09,046 INFO L82 PathProgramCache]: Analyzing trace with hash -639535185, now seen corresponding path program 3 times [2020-10-13 10:43:09,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:09,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858651345] [2020-10-13 10:43:09,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:09,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:09,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:09,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:09,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:43:09,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:09,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-13 10:43:09,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:09,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:43:09,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:09,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:43:09,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:09,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:09,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:09,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:09,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:09,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:09,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:09,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:09,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:09,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:09,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:09,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:09,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858651345] [2020-10-13 10:43:09,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:09,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:43:09,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434286735] [2020-10-13 10:43:09,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:43:09,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:09,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:43:09,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:43:09,259 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2020-10-13 10:43:09,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:09,318 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-10-13 10:43:09,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:43:09,319 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-13 10:43:09,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:09,320 INFO L225 Difference]: With dead ends: 33 [2020-10-13 10:43:09,320 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 10:43:09,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:43:09,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 10:43:09,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-10-13 10:43:09,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 10:43:09,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-10-13 10:43:09,327 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-10-13 10:43:09,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:09,328 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-10-13 10:43:09,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:43:09,328 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-10-13 10:43:09,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:43:09,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:09,329 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:09,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:43:09,329 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:09,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:09,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1391623509, now seen corresponding path program 2 times [2020-10-13 10:43:09,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:09,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246645305] [2020-10-13 10:43:09,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:09,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:09,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:09,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:09,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:09,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:43:09,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:43:09,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-13 10:43:09,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:09,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:43:09,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:43:09,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:43:09,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:09,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:09,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:09,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:09,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:09,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:09,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:09,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:09,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:09,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:09,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:09,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 12 [2020-10-13 10:43:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:43:09,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246645305] [2020-10-13 10:43:09,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:43:09,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:43:09,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640371298] [2020-10-13 10:43:09,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:43:09,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:09,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:43:09,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:43:09,657 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 3 states. [2020-10-13 10:43:09,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:09,672 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-13 10:43:09,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:43:09,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-13 10:43:09,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:09,673 INFO L225 Difference]: With dead ends: 33 [2020-10-13 10:43:09,673 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 10:43:09,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:43:09,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 10:43:09,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-13 10:43:09,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 10:43:09,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-13 10:43:09,680 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2020-10-13 10:43:09,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:09,680 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-13 10:43:09,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:43:09,680 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-13 10:43:09,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:43:09,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:09,681 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:09,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:43:09,682 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:09,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:09,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1784650519, now seen corresponding path program 2 times [2020-10-13 10:43:09,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:09,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260570352] [2020-10-13 10:43:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:09,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:09,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:09,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:10,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:10,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:43:10,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:43:10,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 357 [2020-10-13 10:43:10,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:10,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:43:10,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:10,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:43:10,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:10,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:10,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:10,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:10,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:10,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:10,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:10,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:10,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:10,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:10,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:10,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:10,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:10,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260570352] [2020-10-13 10:43:10,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:10,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:43:10,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474291649] [2020-10-13 10:43:10,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:43:10,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:10,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:43:10,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:43:10,127 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-10-13 10:43:10,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:10,182 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-13 10:43:10,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:43:10,182 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-13 10:43:10,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:10,183 INFO L225 Difference]: With dead ends: 32 [2020-10-13 10:43:10,183 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 10:43:10,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:43:10,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 10:43:10,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-13 10:43:10,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 10:43:10,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-13 10:43:10,190 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 16 [2020-10-13 10:43:10,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:10,190 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-13 10:43:10,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:43:10,190 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-13 10:43:10,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:43:10,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:10,191 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:10,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:43:10,192 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:10,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:10,192 INFO L82 PathProgramCache]: Analyzing trace with hash 662342572, now seen corresponding path program 4 times [2020-10-13 10:43:10,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:10,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625050814] [2020-10-13 10:43:10,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:10,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:10,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:10,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:10,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:43:10,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:10,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-13 10:43:10,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:43:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:43:10,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:10,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:10,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:10,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:10,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:10,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:10,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:10,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:10,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:10,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:10,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:10,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:10,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625050814] [2020-10-13 10:43:10,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:10,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:43:10,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580278622] [2020-10-13 10:43:10,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:43:10,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:10,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:43:10,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:43:10,461 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2020-10-13 10:43:10,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:10,525 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-13 10:43:10,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:43:10,526 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-13 10:43:10,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:10,527 INFO L225 Difference]: With dead ends: 34 [2020-10-13 10:43:10,527 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 10:43:10,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:43:10,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 10:43:10,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-13 10:43:10,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 10:43:10,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-13 10:43:10,534 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 18 [2020-10-13 10:43:10,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:10,534 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-13 10:43:10,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:43:10,534 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-13 10:43:10,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:43:10,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:10,535 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:10,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:43:10,536 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:10,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:10,536 INFO L82 PathProgramCache]: Analyzing trace with hash -224607324, now seen corresponding path program 3 times [2020-10-13 10:43:10,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:10,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093382233] [2020-10-13 10:43:10,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:10,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:10,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:10,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:10,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:43:10,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:10,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-10-13 10:43:10,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:10,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:43:10,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:43:10,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:43:10,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:13,778 WARN L193 SmtUtils]: Spent 2.70 s on a formula simplification. DAG size of input: 140 DAG size of output: 25 [2020-10-13 10:43:18,259 WARN L193 SmtUtils]: Spent 4.43 s on a formula simplification. DAG size of input: 146 DAG size of output: 25 [2020-10-13 10:43:18,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:18,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:18,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:18,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:18,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:18,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:18,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:18,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:18,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:18,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:18,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 10:43:18,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093382233] [2020-10-13 10:43:18,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:43:18,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 10:43:18,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164053152] [2020-10-13 10:43:18,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:43:18,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:18,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:43:18,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:43:18,292 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 7 states. [2020-10-13 10:43:18,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:18,364 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-10-13 10:43:18,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:43:18,364 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-13 10:43:18,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:18,365 INFO L225 Difference]: With dead ends: 33 [2020-10-13 10:43:18,365 INFO L226 Difference]: Without dead ends: 21 [2020-10-13 10:43:18,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:43:18,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-13 10:43:18,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-13 10:43:18,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 10:43:18,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-13 10:43:18,370 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-10-13 10:43:18,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:18,371 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-13 10:43:18,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:43:18,371 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-13 10:43:18,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:43:18,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:18,372 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:18,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:43:18,372 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:18,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:18,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1931383913, now seen corresponding path program 5 times [2020-10-13 10:43:18,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:18,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421951167] [2020-10-13 10:43:18,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:18,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:18,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:18,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:18,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:43:18,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:18,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-13 10:43:18,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:18,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:43:18,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:18,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:43:18,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:18,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:18,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:18,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:18,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:18,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:18,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:18,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:18,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:18,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:18,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:18,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:18,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421951167] [2020-10-13 10:43:18,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:18,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:43:18,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094033438] [2020-10-13 10:43:18,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:43:18,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:18,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:43:18,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:43:18,663 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-10-13 10:43:18,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:18,755 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-13 10:43:18,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:43:18,756 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-13 10:43:18,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:18,757 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:43:18,757 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 10:43:18,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:43:18,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 10:43:18,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-13 10:43:18,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 10:43:18,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-13 10:43:18,762 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-10-13 10:43:18,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:18,762 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-13 10:43:18,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:43:18,763 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-13 10:43:18,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:43:18,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:18,764 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:18,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:43:18,764 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:18,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:18,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1709400550, now seen corresponding path program 6 times [2020-10-13 10:43:18,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:18,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84642475] [2020-10-13 10:43:18,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:18,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:18,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:19,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:19,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:43:19,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:19,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-10-13 10:43:19,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:19,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:43:19,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:19,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:43:19,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:19,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:19,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:19,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:19,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:19,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:19,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:19,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:19,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:19,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:19,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:19,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:19,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84642475] [2020-10-13 10:43:19,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:19,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:43:19,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171675713] [2020-10-13 10:43:19,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:43:19,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:19,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:43:19,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:43:19,230 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-10-13 10:43:19,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:19,347 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-13 10:43:19,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:43:19,348 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-13 10:43:19,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:19,348 INFO L225 Difference]: With dead ends: 31 [2020-10-13 10:43:19,349 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 10:43:19,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:43:19,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 10:43:19,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-13 10:43:19,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 10:43:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-13 10:43:19,354 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-10-13 10:43:19,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:19,354 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-13 10:43:19,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:43:19,354 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-13 10:43:19,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:43:19,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:19,355 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:19,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:43:19,356 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:19,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:19,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1163213789, now seen corresponding path program 7 times [2020-10-13 10:43:19,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:19,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432861540] [2020-10-13 10:43:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:19,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:19,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:19,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:19,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:43:19,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:19,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-10-13 10:43:19,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:19,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:43:19,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:19,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:43:19,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:19,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:19,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:19,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:19,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:19,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:19,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:19,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:19,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:19,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:19,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:19,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:19,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432861540] [2020-10-13 10:43:19,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:19,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:43:19,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54418114] [2020-10-13 10:43:19,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:43:19,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:19,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:43:19,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:43:19,923 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2020-10-13 10:43:20,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:20,058 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-13 10:43:20,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:43:20,059 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-13 10:43:20,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:20,060 INFO L225 Difference]: With dead ends: 33 [2020-10-13 10:43:20,060 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 10:43:20,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:43:20,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 10:43:20,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-13 10:43:20,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 10:43:20,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-13 10:43:20,066 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-10-13 10:43:20,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:20,067 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-13 10:43:20,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:43:20,067 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-13 10:43:20,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 10:43:20,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:20,068 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:20,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:43:20,069 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:20,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:20,069 INFO L82 PathProgramCache]: Analyzing trace with hash -81622240, now seen corresponding path program 8 times [2020-10-13 10:43:20,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:20,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034842053] [2020-10-13 10:43:20,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:20,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:20,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:20,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:20,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:43:20,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:20,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-10-13 10:43:20,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:20,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:43:20,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:20,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:43:20,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:20,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:20,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:20,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:20,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:20,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:20,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:20,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:20,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:20,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:20,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:20,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:20,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034842053] [2020-10-13 10:43:20,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:20,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:43:20,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930034556] [2020-10-13 10:43:20,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:43:20,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:20,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:43:20,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:43:20,549 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-10-13 10:43:20,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:20,689 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-13 10:43:20,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:43:20,689 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-13 10:43:20,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:20,690 INFO L225 Difference]: With dead ends: 35 [2020-10-13 10:43:20,690 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 10:43:20,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:43:20,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 10:43:20,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-13 10:43:20,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 10:43:20,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-13 10:43:20,696 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-10-13 10:43:20,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:20,696 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-13 10:43:20,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:43:20,696 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-13 10:43:20,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:43:20,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:20,697 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:20,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:43:20,698 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:20,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:20,698 INFO L82 PathProgramCache]: Analyzing trace with hash -54229283, now seen corresponding path program 9 times [2020-10-13 10:43:20,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:20,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558919623] [2020-10-13 10:43:20,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:20,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:20,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:21,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:21,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:43:21,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:21,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 540 [2020-10-13 10:43:21,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:21,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:43:21,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:21,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:43:21,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:21,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:21,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:21,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:21,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:21,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:21,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:43:21,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:21,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:21,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:21,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:21,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:21,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558919623] [2020-10-13 10:43:21,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:21,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:43:21,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020311939] [2020-10-13 10:43:21,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:43:21,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:21,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:43:21,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:43:21,437 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 12 states. [2020-10-13 10:43:21,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:21,613 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-13 10:43:21,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:43:21,615 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-13 10:43:21,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:21,616 INFO L225 Difference]: With dead ends: 37 [2020-10-13 10:43:21,616 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 10:43:21,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:43:21,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 10:43:21,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-13 10:43:21,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:43:21,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-13 10:43:21,625 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-10-13 10:43:21,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:21,626 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-13 10:43:21,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:43:21,627 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-13 10:43:21,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:43:21,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:21,628 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:21,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:43:21,628 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:21,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:21,629 INFO L82 PathProgramCache]: Analyzing trace with hash 500598618, now seen corresponding path program 10 times [2020-10-13 10:43:21,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:21,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343926435] [2020-10-13 10:43:21,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:21,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:21,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:21,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:22,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:22,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:43:22,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:22,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-10-13 10:43:22,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:22,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:43:22,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:22,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:43:22,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:22,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:22,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:22,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:22,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:22,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:22,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:22,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:22,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:22,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:22,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:22,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:22,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343926435] [2020-10-13 10:43:22,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:22,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:43:22,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132688634] [2020-10-13 10:43:22,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:43:22,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:22,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:43:22,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:43:22,261 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 13 states. [2020-10-13 10:43:22,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:22,449 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-13 10:43:22,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:43:22,450 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-13 10:43:22,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:22,450 INFO L225 Difference]: With dead ends: 39 [2020-10-13 10:43:22,450 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 10:43:22,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:43:22,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 10:43:22,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-13 10:43:22,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 10:43:22,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-13 10:43:22,460 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-10-13 10:43:22,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:22,460 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-13 10:43:22,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:43:22,460 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-13 10:43:22,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:43:22,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:22,461 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:22,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:43:22,461 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:22,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:22,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1114266775, now seen corresponding path program 11 times [2020-10-13 10:43:22,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:22,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550700598] [2020-10-13 10:43:22,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:22,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:22,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:23,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:23,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:43:23,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:23,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 529 [2020-10-13 10:43:23,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:23,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:43:23,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:23,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:43:23,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:23,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:23,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:23,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:23,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:23,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:23,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:23,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:23,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:23,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:23,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:23,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:23,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550700598] [2020-10-13 10:43:23,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:23,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:43:23,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929614326] [2020-10-13 10:43:23,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:43:23,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:23,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:43:23,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:43:23,248 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 14 states. [2020-10-13 10:43:23,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:23,500 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-13 10:43:23,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:43:23,501 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-13 10:43:23,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:23,501 INFO L225 Difference]: With dead ends: 41 [2020-10-13 10:43:23,501 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 10:43:23,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:43:23,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 10:43:23,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-13 10:43:23,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 10:43:23,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-13 10:43:23,509 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-10-13 10:43:23,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:23,511 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-13 10:43:23,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:43:23,511 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-13 10:43:23,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:43:23,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:23,513 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:23,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:43:23,514 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:23,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:23,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1856121196, now seen corresponding path program 12 times [2020-10-13 10:43:23,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:23,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471732515] [2020-10-13 10:43:23,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:23,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:23,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:24,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:24,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:43:24,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:24,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 600 [2020-10-13 10:43:24,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:24,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:43:24,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:24,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:43:24,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:24,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:24,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:24,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:24,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:24,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:24,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:24,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:24,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:24,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:24,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:24,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 12 [2020-10-13 10:43:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:24,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471732515] [2020-10-13 10:43:24,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:24,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:43:24,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346598477] [2020-10-13 10:43:24,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:43:24,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:24,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:43:24,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:43:24,394 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 15 states. [2020-10-13 10:43:24,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:24,658 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-13 10:43:24,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:43:24,660 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-13 10:43:24,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:24,661 INFO L225 Difference]: With dead ends: 43 [2020-10-13 10:43:24,661 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 10:43:24,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:43:24,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 10:43:24,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-13 10:43:24,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 10:43:24,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-13 10:43:24,671 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-10-13 10:43:24,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:24,671 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-13 10:43:24,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:43:24,671 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-13 10:43:24,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:43:24,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:24,674 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:24,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:43:24,674 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:24,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:24,675 INFO L82 PathProgramCache]: Analyzing trace with hash -245709487, now seen corresponding path program 13 times [2020-10-13 10:43:24,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:24,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105529121] [2020-10-13 10:43:24,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:24,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:25,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:25,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:25,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:43:25,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:25,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-10-13 10:43:25,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:25,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:43:25,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:25,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:43:25,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:25,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:25,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:25,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:25,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:25,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:25,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:25,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:25,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:25,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:25,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:25,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:25,379 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:25,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105529121] [2020-10-13 10:43:25,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:25,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:43:25,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044541439] [2020-10-13 10:43:25,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:43:25,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:25,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:43:25,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:43:25,382 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 16 states. [2020-10-13 10:43:25,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:25,724 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-13 10:43:25,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:43:25,724 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-13 10:43:25,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:25,725 INFO L225 Difference]: With dead ends: 45 [2020-10-13 10:43:25,725 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 10:43:25,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:43:25,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 10:43:25,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-13 10:43:25,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 10:43:25,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-13 10:43:25,736 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-10-13 10:43:25,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:25,736 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-13 10:43:25,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:43:25,736 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-13 10:43:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:43:25,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:25,737 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:25,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:43:25,738 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:25,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:25,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1171716302, now seen corresponding path program 14 times [2020-10-13 10:43:25,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:25,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83063535] [2020-10-13 10:43:25,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:25,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:26,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:26,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:26,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:43:26,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:26,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 643 [2020-10-13 10:43:26,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:26,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:43:26,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:26,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:43:26,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:26,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:26,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:26,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:26,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:26,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:26,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:26,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:26,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:26,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:26,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:26,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:26,697 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:26,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83063535] [2020-10-13 10:43:26,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:26,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:43:26,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440249335] [2020-10-13 10:43:26,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:43:26,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:26,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:43:26,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:43:26,702 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 17 states. [2020-10-13 10:43:27,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:27,028 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-13 10:43:27,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:43:27,029 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-13 10:43:27,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:27,030 INFO L225 Difference]: With dead ends: 47 [2020-10-13 10:43:27,030 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 10:43:27,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:43:27,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 10:43:27,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-13 10:43:27,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 10:43:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-13 10:43:27,043 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-10-13 10:43:27,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:27,043 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-13 10:43:27,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:43:27,043 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-13 10:43:27,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:43:27,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:27,044 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:27,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:43:27,047 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:27,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:27,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1813266699, now seen corresponding path program 15 times [2020-10-13 10:43:27,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:27,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416437492] [2020-10-13 10:43:27,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:27,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:27,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:27,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:27,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:27,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 10:43:27,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:27,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 561 [2020-10-13 10:43:27,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:27,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:43:27,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:27,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 10:43:27,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:27,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:27,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:27,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:27,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:27,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:27,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:27,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:27,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:27,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:27,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:27,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:27,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416437492] [2020-10-13 10:43:27,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:27,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:43:27,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356569012] [2020-10-13 10:43:27,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:43:27,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:27,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:43:27,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:43:27,954 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 18 states. [2020-10-13 10:43:28,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:28,329 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-13 10:43:28,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:43:28,332 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-13 10:43:28,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:28,332 INFO L225 Difference]: With dead ends: 49 [2020-10-13 10:43:28,333 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 10:43:28,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:43:28,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 10:43:28,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-13 10:43:28,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 10:43:28,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-13 10:43:28,340 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-10-13 10:43:28,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:28,340 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-13 10:43:28,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:43:28,340 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-13 10:43:28,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 10:43:28,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:28,341 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:28,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:43:28,341 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:28,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:28,341 INFO L82 PathProgramCache]: Analyzing trace with hash -132092408, now seen corresponding path program 16 times [2020-10-13 10:43:28,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:28,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853032505] [2020-10-13 10:43:28,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:28,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:28,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:28,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:28,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 10:43:28,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:28,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 584 [2020-10-13 10:43:28,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:28,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:43:28,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:28,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:43:28,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:29,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:29,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:29,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:29,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:29,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:29,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:43:29,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:29,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:29,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:29,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:29,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:29,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853032505] [2020-10-13 10:43:29,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:29,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:43:29,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565274900] [2020-10-13 10:43:29,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:43:29,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:29,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:43:29,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:43:29,304 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 19 states. [2020-10-13 10:43:29,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:29,788 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-10-13 10:43:29,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:43:29,789 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-13 10:43:29,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:29,789 INFO L225 Difference]: With dead ends: 51 [2020-10-13 10:43:29,789 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 10:43:29,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:43:29,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 10:43:29,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-13 10:43:29,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 10:43:29,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-13 10:43:29,806 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-10-13 10:43:29,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:29,806 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-13 10:43:29,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:43:29,806 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-13 10:43:29,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 10:43:29,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:29,807 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:29,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:43:29,808 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:29,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:29,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1311420475, now seen corresponding path program 17 times [2020-10-13 10:43:29,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:29,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450410591] [2020-10-13 10:43:29,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:29,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:30,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:30,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:30,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:43:30,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:30,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 692 [2020-10-13 10:43:30,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:30,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:43:30,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:30,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 10:43:30,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:30,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:30,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:30,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:30,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:30,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:30,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:30,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:30,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:30,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:30,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:30,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:30,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:30,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450410591] [2020-10-13 10:43:30,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:30,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:43:30,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638190834] [2020-10-13 10:43:30,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:43:30,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:30,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:43:30,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:43:30,920 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 20 states. [2020-10-13 10:43:31,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:31,462 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-13 10:43:31,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:43:31,466 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-10-13 10:43:31,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:31,467 INFO L225 Difference]: With dead ends: 53 [2020-10-13 10:43:31,467 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 10:43:31,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:43:31,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 10:43:31,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-13 10:43:31,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 10:43:31,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-13 10:43:31,484 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-10-13 10:43:31,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:31,484 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-13 10:43:31,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:43:31,485 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-13 10:43:31,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:43:31,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:31,485 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:31,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:43:31,486 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:31,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:31,486 INFO L82 PathProgramCache]: Analyzing trace with hash -774326718, now seen corresponding path program 18 times [2020-10-13 10:43:31,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:31,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106777701] [2020-10-13 10:43:31,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:31,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:31,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:32,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:32,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 10:43:32,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:32,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 529 [2020-10-13 10:43:32,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:32,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:43:32,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:32,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:43:32,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:32,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:32,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:32,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:32,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:32,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:32,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:32,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:32,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:32,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:32,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:32,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:32,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106777701] [2020-10-13 10:43:32,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:32,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:43:32,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886719909] [2020-10-13 10:43:32,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:43:32,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:32,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:43:32,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:43:32,453 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 21 states. [2020-10-13 10:43:32,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:32,998 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-13 10:43:32,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:43:32,999 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-13 10:43:32,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:33,000 INFO L225 Difference]: With dead ends: 55 [2020-10-13 10:43:33,000 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 10:43:33,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:43:33,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 10:43:33,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-13 10:43:33,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 10:43:33,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-13 10:43:33,006 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-10-13 10:43:33,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:33,006 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-13 10:43:33,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:43:33,007 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-13 10:43:33,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 10:43:33,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:33,007 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:33,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:43:33,008 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:33,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:33,008 INFO L82 PathProgramCache]: Analyzing trace with hash -23301761, now seen corresponding path program 19 times [2020-10-13 10:43:33,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:33,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073954909] [2020-10-13 10:43:33,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:33,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:33,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:34,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:34,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 10:43:34,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:34,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1250 [2020-10-13 10:43:34,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:34,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:43:34,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:34,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 10:43:34,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:34,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:34,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:34,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:34,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:34,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:34,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:34,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:34,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:34,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:34,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:34,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:34,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073954909] [2020-10-13 10:43:34,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:34,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:43:34,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255083436] [2020-10-13 10:43:34,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:43:34,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:34,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:43:34,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:43:34,895 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 22 states. [2020-10-13 10:43:35,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:35,670 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-10-13 10:43:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:43:35,671 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-13 10:43:35,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:35,672 INFO L225 Difference]: With dead ends: 57 [2020-10-13 10:43:35,672 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 10:43:35,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:43:35,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 10:43:35,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-13 10:43:35,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 10:43:35,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-13 10:43:35,684 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-10-13 10:43:35,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:35,685 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-13 10:43:35,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:43:35,685 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-13 10:43:35,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:43:35,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:35,686 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:35,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:43:35,687 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:35,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:35,689 INFO L82 PathProgramCache]: Analyzing trace with hash 157176188, now seen corresponding path program 20 times [2020-10-13 10:43:35,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:35,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854975827] [2020-10-13 10:43:35,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:35,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:36,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:36,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:36,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 10:43:36,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:36,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1132 [2020-10-13 10:43:36,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:36,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:43:36,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:36,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 10:43:36,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:37,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:37,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:37,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:37,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:37,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:37,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:43:37,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:37,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:37,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:37,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:37,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:37,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854975827] [2020-10-13 10:43:37,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:37,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:43:37,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965105439] [2020-10-13 10:43:37,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:43:37,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:37,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:43:37,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:43:37,430 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 23 states. [2020-10-13 10:43:38,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:38,086 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-13 10:43:38,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:43:38,088 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-13 10:43:38,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:38,089 INFO L225 Difference]: With dead ends: 59 [2020-10-13 10:43:38,089 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 10:43:38,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:43:38,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 10:43:38,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-13 10:43:38,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 10:43:38,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-13 10:43:38,100 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-10-13 10:43:38,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:38,100 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-13 10:43:38,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:43:38,100 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-13 10:43:38,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 10:43:38,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:38,101 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:38,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:43:38,101 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:38,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:38,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1797793337, now seen corresponding path program 21 times [2020-10-13 10:43:38,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:38,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535134115] [2020-10-13 10:43:38,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:38,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:38,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:38,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:38,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 10:43:38,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:38,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 619 [2020-10-13 10:43:38,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:38,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:43:38,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:38,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 10:43:38,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:39,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:39,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:39,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:39,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:39,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:39,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:43:39,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:39,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:39,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:39,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:39,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:39,243 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:39,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535134115] [2020-10-13 10:43:39,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:39,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:43:39,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813865327] [2020-10-13 10:43:39,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:43:39,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:39,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:43:39,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:43:39,246 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 24 states. [2020-10-13 10:43:39,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:39,954 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-13 10:43:39,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:43:39,955 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-10-13 10:43:39,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:39,956 INFO L225 Difference]: With dead ends: 61 [2020-10-13 10:43:39,956 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 10:43:39,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:43:39,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 10:43:39,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-13 10:43:39,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:43:39,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-13 10:43:39,963 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-10-13 10:43:39,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:39,963 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-13 10:43:39,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:43:39,963 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-13 10:43:39,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 10:43:39,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:39,964 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:39,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:43:39,964 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:39,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:39,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2117091402, now seen corresponding path program 22 times [2020-10-13 10:43:39,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:39,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128419035] [2020-10-13 10:43:39,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:39,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:40,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:40,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:40,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 10:43:40,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:40,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-10-13 10:43:40,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:40,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:43:40,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:40,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 10:43:40,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:41,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:41,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:41,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:41,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:41,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:41,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:43:41,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:41,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:41,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:41,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:41,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:41,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128419035] [2020-10-13 10:43:41,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:41,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:43:41,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284854224] [2020-10-13 10:43:41,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:43:41,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:41,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:43:41,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:43:41,540 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 25 states. [2020-10-13 10:43:42,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:42,309 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-13 10:43:42,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:43:42,310 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-10-13 10:43:42,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:42,311 INFO L225 Difference]: With dead ends: 63 [2020-10-13 10:43:42,311 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 10:43:42,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:43:42,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 10:43:42,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-13 10:43:42,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 10:43:42,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-13 10:43:42,325 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-10-13 10:43:42,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:42,326 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-13 10:43:42,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:43:42,326 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-13 10:43:42,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 10:43:42,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:42,330 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:42,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:43:42,331 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:42,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:42,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1929974285, now seen corresponding path program 23 times [2020-10-13 10:43:42,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:42,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175946119] [2020-10-13 10:43:42,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:42,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:42,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:42,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:42,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 10:43:42,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:42,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-13 10:43:42,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:42,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:43:42,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:42,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 10:43:42,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:43,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:43,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:43,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:43,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:43,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:43,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:43:43,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:43,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:43,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:43,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:43,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:43,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175946119] [2020-10-13 10:43:43,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:43,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:43:43,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098911976] [2020-10-13 10:43:43,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:43:43,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:43,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:43:43,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:43:43,439 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 26 states. [2020-10-13 10:43:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:44,235 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-10-13 10:43:44,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:43:44,236 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-10-13 10:43:44,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:44,237 INFO L225 Difference]: With dead ends: 65 [2020-10-13 10:43:44,237 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 10:43:44,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:43:44,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 10:43:44,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-13 10:43:44,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 10:43:44,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-13 10:43:44,243 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-10-13 10:43:44,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:44,243 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-13 10:43:44,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:43:44,243 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-13 10:43:44,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 10:43:44,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:44,244 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:44,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:43:44,244 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:44,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:44,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1795916016, now seen corresponding path program 24 times [2020-10-13 10:43:44,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:44,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741584587] [2020-10-13 10:43:44,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:44,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:44,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:44,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:45,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:45,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 10:43:45,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:45,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 786 [2020-10-13 10:43:45,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:45,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:43:45,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:45,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 10:43:45,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:45,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:45,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:45,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:45,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:45,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:45,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:45,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:45,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:45,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:45,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:45,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:45,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:45,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741584587] [2020-10-13 10:43:45,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:45,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:43:45,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015961983] [2020-10-13 10:43:45,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:43:45,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:45,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:43:45,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:43:45,699 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 27 states. [2020-10-13 10:43:46,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:46,566 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-10-13 10:43:46,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:43:46,568 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-10-13 10:43:46,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:46,569 INFO L225 Difference]: With dead ends: 67 [2020-10-13 10:43:46,569 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 10:43:46,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:43:46,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 10:43:46,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-13 10:43:46,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 10:43:46,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-13 10:43:46,580 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-10-13 10:43:46,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:46,581 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-13 10:43:46,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:43:46,583 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-13 10:43:46,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 10:43:46,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:46,584 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:46,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:43:46,585 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:46,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:46,585 INFO L82 PathProgramCache]: Analyzing trace with hash 373770413, now seen corresponding path program 25 times [2020-10-13 10:43:46,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:46,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947803681] [2020-10-13 10:43:46,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:46,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:46,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:47,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:47,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 10:43:47,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:47,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 974 [2020-10-13 10:43:47,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:47,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:43:47,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:47,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 10:43:47,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:48,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:48,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:48,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:48,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:48,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:48,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:48,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:48,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:48,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:48,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:48,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:48,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947803681] [2020-10-13 10:43:48,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:48,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:43:48,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48406197] [2020-10-13 10:43:48,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:43:48,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:48,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:43:48,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:43:48,330 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 28 states. [2020-10-13 10:43:49,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:49,300 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2020-10-13 10:43:49,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:43:49,301 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2020-10-13 10:43:49,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:49,302 INFO L225 Difference]: With dead ends: 69 [2020-10-13 10:43:49,303 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 10:43:49,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:43:49,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 10:43:49,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-13 10:43:49,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 10:43:49,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-10-13 10:43:49,309 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-10-13 10:43:49,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:49,309 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-10-13 10:43:49,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:43:49,309 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-10-13 10:43:49,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 10:43:49,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:49,310 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:49,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:43:49,310 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:49,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:49,310 INFO L82 PathProgramCache]: Analyzing trace with hash -508553942, now seen corresponding path program 26 times [2020-10-13 10:43:49,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:49,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789986946] [2020-10-13 10:43:49,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:49,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:49,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:49,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:49,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 10:43:49,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:49,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 657 [2020-10-13 10:43:49,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:49,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:43:49,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:49,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 10:43:49,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:50,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:50,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:50,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:50,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:50,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:50,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:50,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:50,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:50,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:50,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:50,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:50,871 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:50,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789986946] [2020-10-13 10:43:50,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:50,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 10:43:50,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436924483] [2020-10-13 10:43:50,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 10:43:50,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:50,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 10:43:50,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:43:50,875 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 29 states. [2020-10-13 10:43:51,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:51,953 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-10-13 10:43:51,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 10:43:51,953 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-10-13 10:43:51,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:51,954 INFO L225 Difference]: With dead ends: 71 [2020-10-13 10:43:51,955 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 10:43:51,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:43:51,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 10:43:51,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-13 10:43:51,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 10:43:51,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-10-13 10:43:51,969 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-10-13 10:43:51,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:51,969 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-10-13 10:43:51,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 10:43:51,970 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-10-13 10:43:51,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 10:43:51,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:51,971 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:51,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:43:51,972 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:51,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:51,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1981265511, now seen corresponding path program 27 times [2020-10-13 10:43:51,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:51,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745967934] [2020-10-13 10:43:51,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:52,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:52,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:52,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:52,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 10:43:52,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:52,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 679 [2020-10-13 10:43:52,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:52,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:43:52,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:52,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 10:43:52,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:53,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:53,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:53,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:53,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:53,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:53,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:43:53,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:53,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:53,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:53,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:53,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:53,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745967934] [2020-10-13 10:43:53,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:53,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 10:43:53,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342605771] [2020-10-13 10:43:53,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 10:43:53,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:53,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 10:43:53,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:43:53,492 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 30 states. [2020-10-13 10:43:54,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:54,581 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2020-10-13 10:43:54,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:43:54,582 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 64 [2020-10-13 10:43:54,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:54,583 INFO L225 Difference]: With dead ends: 73 [2020-10-13 10:43:54,584 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 10:43:54,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:43:54,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 10:43:54,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-13 10:43:54,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 10:43:54,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-10-13 10:43:54,590 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-10-13 10:43:54,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:54,590 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-10-13 10:43:54,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 10:43:54,590 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-10-13 10:43:54,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 10:43:54,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:54,591 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:54,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:43:54,591 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:54,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:54,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1893991324, now seen corresponding path program 28 times [2020-10-13 10:43:54,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:54,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068011771] [2020-10-13 10:43:54,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:54,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:55,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:55,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:55,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:43:55,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:55,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1094 [2020-10-13 10:43:55,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:55,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 10:43:55,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:55,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 10:43:55,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:56,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:56,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:56,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:56,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:56,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:56,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:56,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:56,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:56,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:56,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:56,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:56,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:56,499 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:56,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068011771] [2020-10-13 10:43:56,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:56,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:43:56,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577759499] [2020-10-13 10:43:56,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:43:56,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:56,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:43:56,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:43:56,501 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 31 states. [2020-10-13 10:43:57,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:57,664 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-10-13 10:43:57,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:43:57,664 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-10-13 10:43:57,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:57,666 INFO L225 Difference]: With dead ends: 75 [2020-10-13 10:43:57,666 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 10:43:57,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:43:57,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 10:43:57,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-13 10:43:57,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 10:43:57,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-10-13 10:43:57,673 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-10-13 10:43:57,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:57,673 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-10-13 10:43:57,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:43:57,674 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-10-13 10:43:57,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 10:43:57,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:57,675 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:57,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:43:57,675 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:57,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:57,676 INFO L82 PathProgramCache]: Analyzing trace with hash 2015803169, now seen corresponding path program 29 times [2020-10-13 10:43:57,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:57,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79303036] [2020-10-13 10:43:57,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:57,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:58,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:58,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:58,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 10:43:58,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:58,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1045 [2020-10-13 10:43:58,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:58,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 10:43:58,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:43:58,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 10:43:58,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:59,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:59,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:59,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:59,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:59,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:59,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:43:59,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:59,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:59,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:59,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:59,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:59,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79303036] [2020-10-13 10:43:59,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:59,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 10:43:59,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802566335] [2020-10-13 10:43:59,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 10:43:59,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:59,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 10:43:59,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:43:59,611 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 32 states. [2020-10-13 10:44:00,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:00,907 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2020-10-13 10:44:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 10:44:00,907 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-10-13 10:44:00,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:00,908 INFO L225 Difference]: With dead ends: 77 [2020-10-13 10:44:00,909 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 10:44:00,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:44:00,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 10:44:00,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-13 10:44:00,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 10:44:00,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-10-13 10:44:00,915 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-10-13 10:44:00,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:00,915 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-10-13 10:44:00,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 10:44:00,915 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-10-13 10:44:00,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 10:44:00,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:00,916 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:00,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:44:00,916 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:00,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:00,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1231926942, now seen corresponding path program 30 times [2020-10-13 10:44:00,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:00,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738603446] [2020-10-13 10:44:00,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:00,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:01,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:02,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:02,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 10:44:02,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:02,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1251 [2020-10-13 10:44:02,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:02,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:44:02,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:44:02,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 10:44:02,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:03,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:03,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:03,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:03,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:03,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:03,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:03,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:03,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:03,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:03,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:03,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:03,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738603446] [2020-10-13 10:44:03,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:03,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 10:44:03,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685155934] [2020-10-13 10:44:03,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 10:44:03,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:03,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 10:44:03,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:44:03,077 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 33 states. [2020-10-13 10:44:04,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:04,393 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2020-10-13 10:44:04,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 10:44:04,393 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-10-13 10:44:04,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:04,394 INFO L225 Difference]: With dead ends: 79 [2020-10-13 10:44:04,395 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 10:44:04,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:44:04,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 10:44:04,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-13 10:44:04,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 10:44:04,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-10-13 10:44:04,402 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-10-13 10:44:04,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:04,402 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-10-13 10:44:04,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 10:44:04,402 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-10-13 10:44:04,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 10:44:04,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:04,403 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:04,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:44:04,404 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:04,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:04,404 INFO L82 PathProgramCache]: Analyzing trace with hash -453850405, now seen corresponding path program 31 times [2020-10-13 10:44:04,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:04,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130095694] [2020-10-13 10:44:04,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:04,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:05,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:05,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:05,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 10:44:05,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:05,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1315 [2020-10-13 10:44:05,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:05,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 10:44:05,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:44:05,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 10:44:05,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:06,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:06,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:06,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:06,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:06,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:06,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:44:06,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:06,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:06,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:06,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:06,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:06,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130095694] [2020-10-13 10:44:06,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:06,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 10:44:06,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013631526] [2020-10-13 10:44:06,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 10:44:06,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:06,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 10:44:06,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:44:06,650 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 34 states. [2020-10-13 10:44:08,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:08,020 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2020-10-13 10:44:08,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:44:08,024 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 72 [2020-10-13 10:44:08,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:08,025 INFO L225 Difference]: With dead ends: 81 [2020-10-13 10:44:08,025 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 10:44:08,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:44:08,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 10:44:08,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-13 10:44:08,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 10:44:08,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-10-13 10:44:08,034 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-10-13 10:44:08,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:08,034 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-10-13 10:44:08,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 10:44:08,035 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-10-13 10:44:08,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 10:44:08,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:08,035 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:08,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:44:08,036 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:08,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:08,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1283210280, now seen corresponding path program 32 times [2020-10-13 10:44:08,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:08,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674680435] [2020-10-13 10:44:08,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:08,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:08,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:09,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:09,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 10:44:09,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:09,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 984 [2020-10-13 10:44:09,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:09,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 10:44:09,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:44:09,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 10:44:09,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:09,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:09,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:09,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:09,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:09,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:09,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:44:09,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:09,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:09,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:09,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:09,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:10,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674680435] [2020-10-13 10:44:10,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:10,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 10:44:10,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783685483] [2020-10-13 10:44:10,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 10:44:10,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:10,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 10:44:10,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:44:10,010 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 35 states. [2020-10-13 10:44:11,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:11,477 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2020-10-13 10:44:11,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 10:44:11,477 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-10-13 10:44:11,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:11,478 INFO L225 Difference]: With dead ends: 83 [2020-10-13 10:44:11,479 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 10:44:11,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:44:11,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 10:44:11,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-13 10:44:11,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 10:44:11,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-10-13 10:44:11,485 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-10-13 10:44:11,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:11,485 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-10-13 10:44:11,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 10:44:11,486 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-10-13 10:44:11,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 10:44:11,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:11,486 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:11,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:44:11,487 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:11,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:11,487 INFO L82 PathProgramCache]: Analyzing trace with hash 565866901, now seen corresponding path program 33 times [2020-10-13 10:44:11,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:11,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004514184] [2020-10-13 10:44:11,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:11,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:12,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:12,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:12,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 10:44:12,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:12,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1130 [2020-10-13 10:44:12,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:12,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 10:44:12,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:44:12,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 10:44:12,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:13,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:13,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:13,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:13,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:13,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:13,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:44:13,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:13,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:13,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:13,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:13,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:13,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:13,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004514184] [2020-10-13 10:44:13,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:13,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 10:44:13,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968409908] [2020-10-13 10:44:13,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 10:44:13,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:13,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 10:44:13,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:44:13,714 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 36 states. [2020-10-13 10:44:15,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:15,361 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2020-10-13 10:44:15,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:44:15,362 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 76 [2020-10-13 10:44:15,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:15,363 INFO L225 Difference]: With dead ends: 85 [2020-10-13 10:44:15,364 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 10:44:15,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:44:15,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 10:44:15,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-13 10:44:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 10:44:15,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-10-13 10:44:15,370 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-10-13 10:44:15,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:15,371 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-10-13 10:44:15,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 10:44:15,371 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-10-13 10:44:15,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 10:44:15,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:15,372 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:15,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:44:15,372 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:15,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:15,373 INFO L82 PathProgramCache]: Analyzing trace with hash -587422702, now seen corresponding path program 34 times [2020-10-13 10:44:15,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:15,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954735122] [2020-10-13 10:44:15,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:15,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:16,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:17,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:17,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 10:44:17,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:17,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1711 [2020-10-13 10:44:17,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:17,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 10:44:17,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:44:17,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 10:44:17,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:18,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:18,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:18,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:18,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:18,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:18,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:44:18,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:18,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:18,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:18,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:18,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:18,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954735122] [2020-10-13 10:44:18,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:18,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 10:44:18,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115150803] [2020-10-13 10:44:18,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 10:44:18,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:18,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 10:44:18,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:44:18,207 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 37 states. [2020-10-13 10:44:19,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:19,912 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2020-10-13 10:44:19,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 10:44:19,916 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 78 [2020-10-13 10:44:19,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:19,917 INFO L225 Difference]: With dead ends: 87 [2020-10-13 10:44:19,917 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 10:44:19,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:44:19,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 10:44:19,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-13 10:44:19,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 10:44:19,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-10-13 10:44:19,924 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-10-13 10:44:19,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:19,924 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-10-13 10:44:19,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 10:44:19,924 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-10-13 10:44:19,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 10:44:19,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:19,925 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:19,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:44:19,926 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:19,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:19,926 INFO L82 PathProgramCache]: Analyzing trace with hash -797168817, now seen corresponding path program 35 times [2020-10-13 10:44:19,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:19,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151232944] [2020-10-13 10:44:19,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:19,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:21,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:21,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:21,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 10:44:21,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:21,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1484 [2020-10-13 10:44:21,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:21,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 10:44:21,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:44:21,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 10:44:21,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:22,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:22,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:22,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:22,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:22,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:22,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:44:22,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:22,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:22,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:22,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:22,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:22,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151232944] [2020-10-13 10:44:22,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:22,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 10:44:22,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221813722] [2020-10-13 10:44:22,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 10:44:22,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:22,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 10:44:22,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:44:22,552 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 38 states. [2020-10-13 10:44:24,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:24,292 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2020-10-13 10:44:24,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 10:44:24,293 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 80 [2020-10-13 10:44:24,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:24,294 INFO L225 Difference]: With dead ends: 89 [2020-10-13 10:44:24,295 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 10:44:24,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:44:24,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 10:44:24,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-13 10:44:24,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 10:44:24,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-10-13 10:44:24,300 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-10-13 10:44:24,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:24,301 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-10-13 10:44:24,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 10:44:24,301 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-10-13 10:44:24,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 10:44:24,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:24,302 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:24,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 10:44:24,302 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:24,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:24,302 INFO L82 PathProgramCache]: Analyzing trace with hash -499722420, now seen corresponding path program 36 times [2020-10-13 10:44:24,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:24,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469211507] [2020-10-13 10:44:24,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:24,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:25,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:25,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:25,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 10:44:25,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:25,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1582 [2020-10-13 10:44:25,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:25,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 10:44:25,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:44:25,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 10:44:25,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:27,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:27,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:27,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:27,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:27,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:27,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:27,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:27,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:27,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:27,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:27,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:27,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469211507] [2020-10-13 10:44:27,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:27,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 10:44:27,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992883434] [2020-10-13 10:44:27,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 10:44:27,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:27,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 10:44:27,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:44:27,074 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 39 states. [2020-10-13 10:44:28,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:28,965 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2020-10-13 10:44:28,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 10:44:28,967 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-10-13 10:44:28,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:28,968 INFO L225 Difference]: With dead ends: 91 [2020-10-13 10:44:28,968 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 10:44:28,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:44:28,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 10:44:28,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-13 10:44:28,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 10:44:28,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-10-13 10:44:28,974 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-10-13 10:44:28,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:28,975 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-10-13 10:44:28,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 10:44:28,975 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-10-13 10:44:28,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 10:44:28,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:28,976 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:28,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 10:44:28,976 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:28,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:28,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1878423561, now seen corresponding path program 37 times [2020-10-13 10:44:28,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:28,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653440863] [2020-10-13 10:44:28,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:29,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:30,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:30,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:30,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 10:44:30,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:30,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1389 [2020-10-13 10:44:30,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:30,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 10:44:30,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:44:30,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 10:44:30,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:31,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:31,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:31,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:31,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:31,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:31,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:44:31,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:31,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:31,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:31,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:31,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:31,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653440863] [2020-10-13 10:44:31,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:31,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 10:44:31,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329057890] [2020-10-13 10:44:31,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 10:44:31,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:31,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 10:44:31,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:44:31,685 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 40 states. [2020-10-13 10:44:33,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:33,641 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2020-10-13 10:44:33,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 10:44:33,642 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-10-13 10:44:33,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:33,643 INFO L225 Difference]: With dead ends: 93 [2020-10-13 10:44:33,643 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 10:44:33,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:44:33,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 10:44:33,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-13 10:44:33,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 10:44:33,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-10-13 10:44:33,649 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-10-13 10:44:33,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:33,650 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-10-13 10:44:33,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 10:44:33,650 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-10-13 10:44:33,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 10:44:33,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:33,651 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:33,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 10:44:33,651 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:33,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:33,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1940857466, now seen corresponding path program 38 times [2020-10-13 10:44:33,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:33,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119590636] [2020-10-13 10:44:33,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:33,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:34,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:36,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:36,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 10:44:36,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:36,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2606 [2020-10-13 10:44:36,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:36,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 10:44:36,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:44:36,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 10:44:36,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:37,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:37,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:37,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:37,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:37,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:37,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:37,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:37,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:37,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:37,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:37,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:37,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119590636] [2020-10-13 10:44:37,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:37,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 10:44:37,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846931559] [2020-10-13 10:44:37,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 10:44:37,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:37,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 10:44:37,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:44:37,632 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 41 states. [2020-10-13 10:44:39,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:39,682 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2020-10-13 10:44:39,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 10:44:39,682 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-10-13 10:44:39,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:39,684 INFO L225 Difference]: With dead ends: 95 [2020-10-13 10:44:39,684 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 10:44:39,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:44:39,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 10:44:39,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-13 10:44:39,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 10:44:39,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-10-13 10:44:39,692 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-10-13 10:44:39,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:39,693 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-10-13 10:44:39,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 10:44:39,693 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-10-13 10:44:39,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 10:44:39,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:39,694 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:39,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 10:44:39,694 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:39,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:39,695 INFO L82 PathProgramCache]: Analyzing trace with hash -72886333, now seen corresponding path program 39 times [2020-10-13 10:44:39,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:39,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346978846] [2020-10-13 10:44:39,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:39,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:40,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:42,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:42,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 10:44:42,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:42,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3077 [2020-10-13 10:44:42,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:42,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 10:44:42,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:44:42,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 10:44:42,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:44,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:44,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:44,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:44,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:44,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:44,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:44,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:44,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:44,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:44,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:44,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:44,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346978846] [2020-10-13 10:44:44,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:44,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 10:44:44,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603612282] [2020-10-13 10:44:44,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 10:44:44,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:44,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 10:44:44,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 10:44:44,155 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 42 states. [2020-10-13 10:44:46,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:46,283 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2020-10-13 10:44:46,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 10:44:46,283 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 88 [2020-10-13 10:44:46,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:46,285 INFO L225 Difference]: With dead ends: 97 [2020-10-13 10:44:46,285 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 10:44:46,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 10:44:46,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 10:44:46,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-13 10:44:46,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 10:44:46,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-10-13 10:44:46,293 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2020-10-13 10:44:46,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:46,293 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-10-13 10:44:46,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 10:44:46,293 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-10-13 10:44:46,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 10:44:46,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:46,294 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:46,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 10:44:46,295 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:46,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:46,295 INFO L82 PathProgramCache]: Analyzing trace with hash -248957248, now seen corresponding path program 40 times [2020-10-13 10:44:46,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:46,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646425837] [2020-10-13 10:44:46,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:46,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:47,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:48,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:48,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 10:44:48,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:48,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2677 [2020-10-13 10:44:48,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:48,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 10:44:48,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:44:48,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 10:44:48,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:50,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:50,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:50,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:50,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:50,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:50,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:44:50,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:50,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:50,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:50,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:50,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:50,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:50,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646425837] [2020-10-13 10:44:50,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:50,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 10:44:50,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973127056] [2020-10-13 10:44:50,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 10:44:50,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:50,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 10:44:50,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:44:50,446 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 43 states. [2020-10-13 10:44:52,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:52,670 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2020-10-13 10:44:52,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 10:44:52,671 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 90 [2020-10-13 10:44:52,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:52,672 INFO L225 Difference]: With dead ends: 99 [2020-10-13 10:44:52,672 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 10:44:52,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:44:52,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 10:44:52,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-13 10:44:52,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 10:44:52,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-10-13 10:44:52,679 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2020-10-13 10:44:52,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:52,679 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-10-13 10:44:52,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 10:44:52,680 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-10-13 10:44:52,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 10:44:52,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:52,681 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:52,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 10:44:52,681 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:52,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:52,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1949382019, now seen corresponding path program 41 times [2020-10-13 10:44:52,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:52,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964051822] [2020-10-13 10:44:52,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:52,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:53,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:56,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:56,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 10:44:56,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:56,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3691 [2020-10-13 10:44:56,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:56,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 10:44:56,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:44:56,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 10:44:56,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:57,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:57,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:57,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:57,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:57,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:57,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:44:57,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:57,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:57,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:57,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:57,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:57,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964051822] [2020-10-13 10:44:57,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:57,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 10:44:57,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388489438] [2020-10-13 10:44:57,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 10:44:57,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:57,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 10:44:57,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 10:44:57,915 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 44 states. [2020-10-13 10:45:00,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:00,236 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2020-10-13 10:45:00,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 10:45:00,240 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 92 [2020-10-13 10:45:00,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:00,241 INFO L225 Difference]: With dead ends: 101 [2020-10-13 10:45:00,241 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 10:45:00,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 10:45:00,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 10:45:00,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-13 10:45:00,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 10:45:00,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-10-13 10:45:00,249 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2020-10-13 10:45:00,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:00,249 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-10-13 10:45:00,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 10:45:00,249 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-10-13 10:45:00,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 10:45:00,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:00,250 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:00,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 10:45:00,251 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:00,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:00,251 INFO L82 PathProgramCache]: Analyzing trace with hash 324952826, now seen corresponding path program 42 times [2020-10-13 10:45:00,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:00,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256804219] [2020-10-13 10:45:00,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:00,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:01,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:04,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:04,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 10:45:04,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:04,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3731 [2020-10-13 10:45:04,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:04,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 10:45:04,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:45:04,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 10:45:04,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:05,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:05,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:05,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:05,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:05,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:45:05,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:05,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:45:05,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:05,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:05,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:05,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:05,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:45:05,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256804219] [2020-10-13 10:45:05,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:05,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 10:45:05,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491866082] [2020-10-13 10:45:05,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 10:45:05,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:05,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 10:45:05,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:45:05,546 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 45 states. [2020-10-13 10:45:07,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:07,919 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2020-10-13 10:45:07,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 10:45:07,920 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 94 [2020-10-13 10:45:07,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:07,922 INFO L225 Difference]: With dead ends: 103 [2020-10-13 10:45:07,922 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 10:45:07,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:45:07,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 10:45:07,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-13 10:45:07,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 10:45:07,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-10-13 10:45:07,929 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2020-10-13 10:45:07,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:07,930 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-10-13 10:45:07,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 10:45:07,930 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-10-13 10:45:07,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 10:45:07,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:07,931 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:07,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 10:45:07,931 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:07,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:07,931 INFO L82 PathProgramCache]: Analyzing trace with hash -177614793, now seen corresponding path program 43 times [2020-10-13 10:45:07,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:07,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884484412] [2020-10-13 10:45:07,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:07,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:09,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:10,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:10,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 10:45:10,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:10,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2910 [2020-10-13 10:45:10,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:10,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 10:45:10,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:45:10,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-13 10:45:10,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:12,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:12,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:12,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:12,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:45:12,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:12,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:45:12,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:12,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:12,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:12,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:12,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:45:12,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884484412] [2020-10-13 10:45:12,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:12,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 10:45:12,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621850338] [2020-10-13 10:45:12,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 10:45:12,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:12,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 10:45:12,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 10:45:12,422 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 46 states. [2020-10-13 10:45:14,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:14,952 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2020-10-13 10:45:14,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 10:45:14,952 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 96 [2020-10-13 10:45:14,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:14,953 INFO L225 Difference]: With dead ends: 105 [2020-10-13 10:45:14,954 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 10:45:14,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 10:45:14,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 10:45:14,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-13 10:45:14,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 10:45:14,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-10-13 10:45:14,961 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2020-10-13 10:45:14,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:14,961 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-10-13 10:45:14,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 10:45:14,962 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-10-13 10:45:14,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 10:45:14,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:14,963 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:14,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 10:45:14,963 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:14,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:14,963 INFO L82 PathProgramCache]: Analyzing trace with hash -2108759500, now seen corresponding path program 44 times [2020-10-13 10:45:14,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:14,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191627906] [2020-10-13 10:45:14,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:14,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:14,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:16,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:18,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:18,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 10:45:18,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:18,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3117 [2020-10-13 10:45:18,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:18,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 10:45:18,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:45:18,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-13 10:45:18,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:19,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:19,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:19,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:19,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:45:19,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:19,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:45:19,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:19,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:19,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:19,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:19,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:19,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:45:19,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191627906] [2020-10-13 10:45:19,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:19,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 10:45:19,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736099904] [2020-10-13 10:45:19,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 10:45:19,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:19,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 10:45:19,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 10:45:19,818 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 47 states. [2020-10-13 10:45:22,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:22,442 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2020-10-13 10:45:22,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 10:45:22,443 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 98 [2020-10-13 10:45:22,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:22,445 INFO L225 Difference]: With dead ends: 107 [2020-10-13 10:45:22,445 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 10:45:22,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 10:45:22,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 10:45:22,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-13 10:45:22,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 10:45:22,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-10-13 10:45:22,450 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2020-10-13 10:45:22,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:22,451 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-10-13 10:45:22,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 10:45:22,451 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-10-13 10:45:22,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 10:45:22,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:22,452 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:22,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 10:45:22,452 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:22,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:22,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1782016241, now seen corresponding path program 45 times [2020-10-13 10:45:22,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:22,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21009402] [2020-10-13 10:45:22,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:22,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:22,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:23,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:27,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:27,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 10:45:27,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:27,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4568 [2020-10-13 10:45:27,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:27,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 10:45:27,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:45:27,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-13 10:45:27,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:28,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:28,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:28,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:28,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:45:28,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:28,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:45:28,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:28,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:28,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:28,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:28,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:45:28,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21009402] [2020-10-13 10:45:28,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:28,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 10:45:28,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749902511] [2020-10-13 10:45:28,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 10:45:28,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:28,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 10:45:28,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 10:45:28,811 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 48 states. [2020-10-13 10:45:31,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:31,481 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2020-10-13 10:45:31,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 10:45:31,481 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 100 [2020-10-13 10:45:31,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:31,483 INFO L225 Difference]: With dead ends: 109 [2020-10-13 10:45:31,483 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 10:45:31,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 10:45:31,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 10:45:31,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-13 10:45:31,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 10:45:31,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-10-13 10:45:31,489 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2020-10-13 10:45:31,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:31,490 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-10-13 10:45:31,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 10:45:31,490 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-10-13 10:45:31,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 10:45:31,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:31,491 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:31,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 10:45:31,491 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:31,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:31,491 INFO L82 PathProgramCache]: Analyzing trace with hash -99011474, now seen corresponding path program 46 times [2020-10-13 10:45:31,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:31,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874591232] [2020-10-13 10:45:31,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:31,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:34,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:34,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:34,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 10:45:34,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:34,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2807 [2020-10-13 10:45:34,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:34,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 10:45:34,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:45:34,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-13 10:45:34,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:36,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:36,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:36,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:36,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:45:36,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:36,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:45:36,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:36,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:36,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:36,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:36,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:45:36,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874591232] [2020-10-13 10:45:36,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:36,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-13 10:45:36,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323697597] [2020-10-13 10:45:36,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-13 10:45:36,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:36,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-13 10:45:36,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 10:45:36,207 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 49 states. [2020-10-13 10:45:39,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:39,022 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2020-10-13 10:45:39,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 10:45:39,023 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 102 [2020-10-13 10:45:39,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:39,024 INFO L225 Difference]: With dead ends: 111 [2020-10-13 10:45:39,025 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 10:45:39,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 10:45:39,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 10:45:39,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-13 10:45:39,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-13 10:45:39,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-10-13 10:45:39,029 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2020-10-13 10:45:39,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:39,030 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-10-13 10:45:39,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-13 10:45:39,030 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-10-13 10:45:39,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 10:45:39,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:39,031 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:39,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 10:45:39,031 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:39,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:39,031 INFO L82 PathProgramCache]: Analyzing trace with hash 414586027, now seen corresponding path program 47 times [2020-10-13 10:45:39,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:39,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932414036] [2020-10-13 10:45:39,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:39,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:40,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:42,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:42,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 10:45:42,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:42,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3315 [2020-10-13 10:45:42,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:42,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-13 10:45:42,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:45:42,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 10:45:42,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:44,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:44,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:44,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:44,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:45:44,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:44,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:45:44,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:44,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:44,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:44,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:44,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:45:44,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932414036] [2020-10-13 10:45:44,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:44,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-13 10:45:44,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118308994] [2020-10-13 10:45:44,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-13 10:45:44,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:44,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-13 10:45:44,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 10:45:44,371 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 50 states. [2020-10-13 10:45:47,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:47,273 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2020-10-13 10:45:47,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 10:45:47,274 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 104 [2020-10-13 10:45:47,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:47,275 INFO L225 Difference]: With dead ends: 113 [2020-10-13 10:45:47,275 INFO L226 Difference]: Without dead ends: 108 [2020-10-13 10:45:47,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 10:45:47,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-13 10:45:47,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-13 10:45:47,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 10:45:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-10-13 10:45:47,282 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2020-10-13 10:45:47,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:47,282 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-10-13 10:45:47,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-13 10:45:47,282 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-10-13 10:45:47,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 10:45:47,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:47,283 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:47,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 10:45:47,284 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:47,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:47,284 INFO L82 PathProgramCache]: Analyzing trace with hash 60545448, now seen corresponding path program 48 times [2020-10-13 10:45:47,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:47,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443574845] [2020-10-13 10:45:47,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:47,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:49,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:50,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:50,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 10:45:50,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:50,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3458 [2020-10-13 10:45:50,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:50,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-13 10:45:50,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:45:50,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-13 10:45:50,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:52,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:52,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:52,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:52,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:45:52,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:52,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:45:52,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:52,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:52,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:52,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:52,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:45:52,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443574845] [2020-10-13 10:45:52,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:52,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-13 10:45:52,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493111996] [2020-10-13 10:45:52,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-13 10:45:52,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:52,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-13 10:45:52,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 10:45:52,806 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 51 states. [2020-10-13 10:45:55,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:55,838 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2020-10-13 10:45:55,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 10:45:55,838 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 106 [2020-10-13 10:45:55,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:55,839 INFO L225 Difference]: With dead ends: 115 [2020-10-13 10:45:55,839 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 10:45:55,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 10:45:55,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 10:45:55,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-13 10:45:55,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 10:45:55,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-10-13 10:45:55,846 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2020-10-13 10:45:55,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:55,846 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-10-13 10:45:55,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-13 10:45:55,847 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-10-13 10:45:55,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 10:45:55,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:55,847 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:55,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 10:45:55,848 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:55,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:55,848 INFO L82 PathProgramCache]: Analyzing trace with hash -870034587, now seen corresponding path program 49 times [2020-10-13 10:45:55,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:55,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602057925] [2020-10-13 10:45:55,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:55,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:57,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:59,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:59,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 10:45:59,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:59,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3826 [2020-10-13 10:45:59,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:59,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-13 10:45:59,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:45:59,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-13 10:45:59,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:01,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:01,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:01,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:01,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:01,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:01,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:46:01,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:01,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:01,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:01,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:01,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:46:01,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602057925] [2020-10-13 10:46:01,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:01,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-13 10:46:01,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530407181] [2020-10-13 10:46:01,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-13 10:46:01,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:01,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-13 10:46:01,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 10:46:01,778 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 52 states. [2020-10-13 10:46:04,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:04,970 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2020-10-13 10:46:04,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 10:46:04,971 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 108 [2020-10-13 10:46:04,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:04,972 INFO L225 Difference]: With dead ends: 117 [2020-10-13 10:46:04,973 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 10:46:04,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 10:46:04,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 10:46:04,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-13 10:46:04,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 10:46:04,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-10-13 10:46:04,979 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2020-10-13 10:46:04,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:04,980 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-10-13 10:46:04,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-13 10:46:04,980 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-10-13 10:46:04,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 10:46:04,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:04,981 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:04,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 10:46:04,981 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:04,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:04,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1804250654, now seen corresponding path program 50 times [2020-10-13 10:46:04,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:04,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018733467] [2020-10-13 10:46:04,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:05,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:06,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:10,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:10,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 10:46:10,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:46:10,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-13 10:46:10,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:10,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-13 10:46:10,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:46:10,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-13 10:46:10,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0