/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/array-examples/standard_copy3_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:45:58,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:45:58,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:45:58,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:45:58,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:45:58,480 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:45:58,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:45:58,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:45:58,484 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:45:58,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:45:58,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:45:58,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:45:58,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:45:58,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:45:58,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:45:58,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:45:58,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:45:58,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:45:58,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:45:58,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:45:58,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:45:58,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:45:58,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:45:58,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:45:58,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:45:58,501 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:45:58,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:45:58,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:45:58,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:45:58,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:45:58,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:45:58,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:45:58,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:45:58,508 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:45:58,509 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:45:58,509 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:45:58,510 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:45:58,510 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:45:58,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:45:58,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:45:58,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:45:58,514 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 04:45:58,561 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:45:58,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:45:58,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:45:58,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:45:58,563 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:45:58,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:45:58,563 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:45:58,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:45:58,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:45:58,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:45:58,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:45:58,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:45:58,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:45:58,565 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:45:58,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:45:58,566 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:45:58,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:45:58,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:45:58,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:45:58,566 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:45:58,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:45:58,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:45:58,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:45:58,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:45:58,568 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:45:58,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:45:58,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:45:58,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:45:58,569 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:45:58,569 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 04:45:58,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:45:58,901 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:45:58,906 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:45:58,909 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:45:58,910 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:45:58,911 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-1.i [2020-10-13 04:45:58,965 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17b067366/32e3c8488081447c9ee14efe9ade984a/FLAG584f72610 [2020-10-13 04:45:59,368 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:45:59,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy3_ground-1.i [2020-10-13 04:45:59,375 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17b067366/32e3c8488081447c9ee14efe9ade984a/FLAG584f72610 [2020-10-13 04:45:59,792 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17b067366/32e3c8488081447c9ee14efe9ade984a [2020-10-13 04:45:59,800 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:45:59,802 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:45:59,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:45:59,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:45:59,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:45:59,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:45:59" (1/1) ... [2020-10-13 04:45:59,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c09893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:45:59, skipping insertion in model container [2020-10-13 04:45:59,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:45:59" (1/1) ... [2020-10-13 04:45:59,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:45:59,834 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:46:00,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:46:00,006 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:46:00,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:46:00,049 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:46:00,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:00 WrapperNode [2020-10-13 04:46:00,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:46:00,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:46:00,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:46:00,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:46:00,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:00" (1/1) ... [2020-10-13 04:46:00,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:00" (1/1) ... [2020-10-13 04:46:00,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:00" (1/1) ... [2020-10-13 04:46:00,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:00" (1/1) ... [2020-10-13 04:46:00,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:00" (1/1) ... [2020-10-13 04:46:00,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:00" (1/1) ... [2020-10-13 04:46:00,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:00" (1/1) ... [2020-10-13 04:46:00,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:46:00,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:46:00,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:46:00,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:46:00,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:00" (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 04:46:00,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:46:00,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:46:00,222 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:46:00,222 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:46:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:46:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:46:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:46:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:46:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:46:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:46:00,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:46:00,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:46:00,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:46:00,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:46:00,509 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:46:00,509 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-13 04:46:00,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:46:00 BoogieIcfgContainer [2020-10-13 04:46:00,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:46:00,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:46:00,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:46:00,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:46:00,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:45:59" (1/3) ... [2020-10-13 04:46:00,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3874d293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:46:00, skipping insertion in model container [2020-10-13 04:46:00,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:00" (2/3) ... [2020-10-13 04:46:00,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3874d293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:46:00, skipping insertion in model container [2020-10-13 04:46:00,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:46:00" (3/3) ... [2020-10-13 04:46:00,522 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-1.i [2020-10-13 04:46:00,535 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:46:00,542 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:46:00,557 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:46:00,581 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:46:00,581 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:46:00,581 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:46:00,581 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:46:00,582 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:46:00,582 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:46:00,582 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:46:00,582 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:46:00,609 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-13 04:46:00,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 04:46:00,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:00,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:00,624 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:00,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:00,634 INFO L82 PathProgramCache]: Analyzing trace with hash -496428460, now seen corresponding path program 1 times [2020-10-13 04:46:00,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:00,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985879550] [2020-10-13 04:46:00,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:00,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:00,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:00,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:00,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:01,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:01,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 04:46:01,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:01,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 589 [2020-10-13 04:46:01,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:01,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:01,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:46:01,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:01,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:46:01,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:01,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:01,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:01,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:01,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:01,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:46:01,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:01,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:01,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:01,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:01,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:46:01,425 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 04:46:01,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985879550] [2020-10-13 04:46:01,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:46:01,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:46:01,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183602100] [2020-10-13 04:46:01,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:46:01,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:01,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:46:01,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:46:01,451 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-13 04:46:01,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:01,589 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-10-13 04:46:01,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:46:01,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-13 04:46:01,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:01,600 INFO L225 Difference]: With dead ends: 58 [2020-10-13 04:46:01,601 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 04:46:01,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:46:01,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 04:46:01,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 04:46:01,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 04:46:01,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-13 04:46:01,644 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2020-10-13 04:46:01,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:01,644 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-13 04:46:01,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:46:01,645 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-13 04:46:01,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 04:46:01,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:01,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:01,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:46:01,647 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:01,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:01,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1263989582, now seen corresponding path program 1 times [2020-10-13 04:46:01,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:01,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840969960] [2020-10-13 04:46:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:01,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:01,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:01,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:01,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:01,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:01,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 04:46:01,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:01,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-13 04:46:01,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:01,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:46:01,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:01,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:46:01,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:01,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:01,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:01,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:01,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:01,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:01,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:46:01,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:01,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:01,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:01,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:01,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:01,964 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 04:46:01,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840969960] [2020-10-13 04:46:01,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:46:01,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:46:01,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904762265] [2020-10-13 04:46:01,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:46:01,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:01,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:46:01,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:46:01,975 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 4 states. [2020-10-13 04:46:02,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:02,095 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-10-13 04:46:02,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:46:02,096 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-13 04:46:02,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:02,097 INFO L225 Difference]: With dead ends: 50 [2020-10-13 04:46:02,098 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 04:46:02,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:46:02,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 04:46:02,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-13 04:46:02,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 04:46:02,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-13 04:46:02,112 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 19 [2020-10-13 04:46:02,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:02,113 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-13 04:46:02,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:46:02,114 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-13 04:46:02,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 04:46:02,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:02,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:02,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:46:02,117 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:02,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:02,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1258945684, now seen corresponding path program 1 times [2020-10-13 04:46:02,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:02,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039301273] [2020-10-13 04:46:02,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:02,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:02,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:02,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:02,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:02,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:02,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 04:46:02,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:02,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 430 [2020-10-13 04:46:02,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:02,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:46:02,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 04:46:02,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:46:02,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:46:02,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:02,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:02,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:02,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:02,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:02,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 04:46:02,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:02,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:02,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:02,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:02,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:46:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:46:02,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039301273] [2020-10-13 04:46:02,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:46:02,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:46:02,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239331682] [2020-10-13 04:46:02,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:46:02,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:02,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:46:02,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:46:02,625 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 4 states. [2020-10-13 04:46:02,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:02,763 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2020-10-13 04:46:02,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:46:02,764 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-13 04:46:02,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:02,765 INFO L225 Difference]: With dead ends: 52 [2020-10-13 04:46:02,765 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 04:46:02,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:46:02,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 04:46:02,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-13 04:46:02,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 04:46:02,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-13 04:46:02,779 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 21 [2020-10-13 04:46:02,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:02,779 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-13 04:46:02,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:46:02,780 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-13 04:46:02,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 04:46:02,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:02,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:02,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:46:02,782 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:02,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:02,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1930458438, now seen corresponding path program 1 times [2020-10-13 04:46:02,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:02,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699091442] [2020-10-13 04:46:02,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:02,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:02,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:02,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:02,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:03,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:05,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:05,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 04:46:05,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:46:05,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3070 [2020-10-13 04:46:05,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:05,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:46:05,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 04:46:05,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:46:05,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:05,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:05,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:05,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:05,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:05,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:05,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:05,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:46:05,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:05,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:05,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:05,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:05,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:05,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 04:46:05,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699091442] [2020-10-13 04:46:05,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:05,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:46:05,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590776180] [2020-10-13 04:46:05,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:46:05,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:05,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:46:05,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:46:05,915 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 5 states. [2020-10-13 04:46:06,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:06,009 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-10-13 04:46:06,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:46:06,009 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-10-13 04:46:06,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:06,010 INFO L225 Difference]: With dead ends: 60 [2020-10-13 04:46:06,010 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 04:46:06,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:46:06,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 04:46:06,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-13 04:46:06,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 04:46:06,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-13 04:46:06,018 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-10-13 04:46:06,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:06,018 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-13 04:46:06,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:46:06,019 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-13 04:46:06,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 04:46:06,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:06,020 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:06,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:46:06,020 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:06,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:06,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1864129440, now seen corresponding path program 2 times [2020-10-13 04:46:06,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:06,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261220728] [2020-10-13 04:46:06,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:06,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:06,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:06,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:06,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:08,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:11,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:11,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 04:46:11,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:46:11,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:46:11,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:11,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:46:11,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:11,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:46:11,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:11,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:11,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:11,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:11,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:11,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:11,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:11,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:11,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:11,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:11,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:11,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:46:11,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261220728] [2020-10-13 04:46:11,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:11,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:46:11,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726298776] [2020-10-13 04:46:11,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:46:11,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:11,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:46:11,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:46:11,081 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 5 states. [2020-10-13 04:46:11,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:11,197 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-10-13 04:46:11,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:46:11,197 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-10-13 04:46:11,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:11,198 INFO L225 Difference]: With dead ends: 70 [2020-10-13 04:46:11,199 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 04:46:11,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:46:11,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 04:46:11,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-13 04:46:11,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 04:46:11,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-13 04:46:11,219 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 33 [2020-10-13 04:46:11,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:11,219 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-13 04:46:11,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:46:11,220 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-13 04:46:11,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 04:46:11,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:11,221 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:11,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:46:11,222 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:11,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:11,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1423302462, now seen corresponding path program 3 times [2020-10-13 04:46:11,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:11,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753031994] [2020-10-13 04:46:11,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:11,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:11,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:11,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:11,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:14,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:16,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:16,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 04:46:16,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:46:16,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:46:16,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:16,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:46:16,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 04:46:16,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:46:16,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:16,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:16,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:16,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:16,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:16,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:16,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:16,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:16,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:16,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:16,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:16,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:46:16,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753031994] [2020-10-13 04:46:16,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:16,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:46:16,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279253372] [2020-10-13 04:46:16,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:46:16,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:16,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:46:16,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:46:16,285 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 6 states. [2020-10-13 04:46:16,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:16,390 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-10-13 04:46:16,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:46:16,391 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-13 04:46:16,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:16,392 INFO L225 Difference]: With dead ends: 72 [2020-10-13 04:46:16,392 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 04:46:16,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:46:16,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 04:46:16,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-10-13 04:46:16,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 04:46:16,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-13 04:46:16,399 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 35 [2020-10-13 04:46:16,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:16,400 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-13 04:46:16,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:46:16,400 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-13 04:46:16,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 04:46:16,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:16,401 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:16,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:46:16,402 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:16,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:16,402 INFO L82 PathProgramCache]: Analyzing trace with hash -808703080, now seen corresponding path program 4 times [2020-10-13 04:46:16,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:16,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008150588] [2020-10-13 04:46:16,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:16,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:16,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:16,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:16,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:21,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:21,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 04:46:21,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:21,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:46:21,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:21,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:46:21,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:21,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:46:21,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:21,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:21,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:21,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:21,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:21,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:21,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:21,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:46:21,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:21,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:21,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:21,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:21,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 04:46:21,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008150588] [2020-10-13 04:46:21,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:21,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:46:21,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255198688] [2020-10-13 04:46:21,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:46:21,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:21,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:46:21,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:46:21,482 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 6 states. [2020-10-13 04:46:21,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:21,566 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2020-10-13 04:46:21,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:46:21,567 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-13 04:46:21,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:21,568 INFO L225 Difference]: With dead ends: 84 [2020-10-13 04:46:21,568 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 04:46:21,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:46:21,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 04:46:21,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-13 04:46:21,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 04:46:21,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-13 04:46:21,575 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 41 [2020-10-13 04:46:21,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:21,576 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-13 04:46:21,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:46:21,576 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-13 04:46:21,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 04:46:21,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:21,577 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:21,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:46:21,578 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:21,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:21,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1938764086, now seen corresponding path program 5 times [2020-10-13 04:46:21,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:21,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676165626] [2020-10-13 04:46:21,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:21,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:21,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:21,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:21,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:26,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:26,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 04:46:26,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:26,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:46:26,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:26,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:46:26,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 04:46:26,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:46:26,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:46:26,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:26,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:26,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:26,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:26,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:26,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:26,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:26,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:26,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:26,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:26,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:46:26,670 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 04:46:26,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676165626] [2020-10-13 04:46:26,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:26,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:46:26,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996283903] [2020-10-13 04:46:26,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:46:26,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:26,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:46:26,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:46:26,673 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 7 states. [2020-10-13 04:46:26,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:26,852 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-10-13 04:46:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:46:26,853 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-10-13 04:46:26,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:26,854 INFO L225 Difference]: With dead ends: 84 [2020-10-13 04:46:26,854 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 04:46:26,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:46:26,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 04:46:26,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-10-13 04:46:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 04:46:26,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-13 04:46:26,868 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 43 [2020-10-13 04:46:26,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:26,868 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-13 04:46:26,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:46:26,869 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-13 04:46:26,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 04:46:26,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:26,873 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:26,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:46:26,874 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:26,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:26,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1392108432, now seen corresponding path program 6 times [2020-10-13 04:46:26,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:26,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002032272] [2020-10-13 04:46:26,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:26,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:26,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:26,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:27,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:31,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:31,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 04:46:31,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:31,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:46:31,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:31,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:46:31,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:31,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:46:31,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:31,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:31,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:31,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:31,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:31,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:31,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:31,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:31,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:31,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:31,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:31,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-13 04:46:31,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002032272] [2020-10-13 04:46:31,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:31,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:46:31,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65646933] [2020-10-13 04:46:31,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:46:31,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:31,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:46:31,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:46:31,965 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 7 states. [2020-10-13 04:46:32,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:32,065 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2020-10-13 04:46:32,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:46:32,065 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-10-13 04:46:32,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:32,067 INFO L225 Difference]: With dead ends: 98 [2020-10-13 04:46:32,067 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 04:46:32,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:46:32,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 04:46:32,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-13 04:46:32,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 04:46:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-13 04:46:32,077 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2020-10-13 04:46:32,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:32,078 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-13 04:46:32,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:46:32,078 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-13 04:46:32,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 04:46:32,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:32,081 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:32,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:46:32,082 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:32,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:32,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1545890606, now seen corresponding path program 7 times [2020-10-13 04:46:32,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:32,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908192250] [2020-10-13 04:46:32,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:32,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:32,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:32,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:32,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:37,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:37,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 04:46:37,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:37,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:46:37,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:37,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:46:37,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:37,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:46:37,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:37,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:37,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:37,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:37,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:37,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:37,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:37,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:37,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:37,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:37,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:37,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-13 04:46:37,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908192250] [2020-10-13 04:46:37,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:37,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:46:37,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657777899] [2020-10-13 04:46:37,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:46:37,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:37,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:46:37,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:46:37,161 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 8 states. [2020-10-13 04:46:37,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:37,231 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2020-10-13 04:46:37,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:46:37,231 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-10-13 04:46:37,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:37,232 INFO L225 Difference]: With dead ends: 100 [2020-10-13 04:46:37,232 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 04:46:37,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:46:37,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 04:46:37,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-13 04:46:37,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 04:46:37,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-10-13 04:46:37,239 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 51 [2020-10-13 04:46:37,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:37,239 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-10-13 04:46:37,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:46:37,239 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-10-13 04:46:37,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 04:46:37,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:37,240 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:37,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:46:37,241 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:37,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:37,241 INFO L82 PathProgramCache]: Analyzing trace with hash -993295540, now seen corresponding path program 8 times [2020-10-13 04:46:37,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:37,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888570594] [2020-10-13 04:46:37,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:37,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:37,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:37,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:37,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:42,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:42,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 04:46:42,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:42,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:46:42,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:42,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:46:42,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 04:46:42,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:46:42,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:42,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:42,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:42,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:42,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:42,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:42,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:42,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:42,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:42,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:42,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:42,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-13 04:46:42,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888570594] [2020-10-13 04:46:42,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:42,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:46:42,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861077900] [2020-10-13 04:46:42,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:46:42,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:42,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:46:42,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:46:42,356 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 8 states. [2020-10-13 04:46:42,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:42,487 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2020-10-13 04:46:42,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:46:42,487 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-10-13 04:46:42,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:42,488 INFO L225 Difference]: With dead ends: 98 [2020-10-13 04:46:42,488 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 04:46:42,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:46:42,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 04:46:42,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-10-13 04:46:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 04:46:42,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-10-13 04:46:42,499 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 53 [2020-10-13 04:46:42,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:42,501 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-10-13 04:46:42,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:46:42,501 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-10-13 04:46:42,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 04:46:42,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:42,502 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:42,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:46:42,503 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:42,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:42,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1518498522, now seen corresponding path program 9 times [2020-10-13 04:46:42,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:42,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413292779] [2020-10-13 04:46:42,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:42,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:42,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:42,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:43,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:47,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:47,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 04:46:47,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:47,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:46:47,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:47,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:46:47,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:47,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:46:47,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:47,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:47,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:47,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:47,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:47,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:47,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:47,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:47,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:47,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:47,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:47,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-13 04:46:47,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413292779] [2020-10-13 04:46:47,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:47,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:46:47,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589609947] [2020-10-13 04:46:47,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:46:47,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:47,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:46:47,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:46:47,594 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 9 states. [2020-10-13 04:46:47,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:47,676 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2020-10-13 04:46:47,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:46:47,676 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-13 04:46:47,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:47,677 INFO L225 Difference]: With dead ends: 114 [2020-10-13 04:46:47,677 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 04:46:47,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:46:47,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 04:46:47,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-13 04:46:47,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 04:46:47,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-10-13 04:46:47,690 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2020-10-13 04:46:47,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:47,690 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-10-13 04:46:47,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:46:47,691 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-10-13 04:46:47,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 04:46:47,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:47,694 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:47,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:46:47,694 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:47,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:47,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1100064580, now seen corresponding path program 10 times [2020-10-13 04:46:47,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:47,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482032449] [2020-10-13 04:46:47,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:47,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:47,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:47,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:48,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:52,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:52,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 04:46:52,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:52,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:46:52,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:52,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:46:52,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 04:46:52,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:46:52,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:52,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:52,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:52,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:52,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:52,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:52,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:52,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:52,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:52,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:52,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:52,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-13 04:46:52,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482032449] [2020-10-13 04:46:52,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:52,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:46:52,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085649879] [2020-10-13 04:46:52,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:46:52,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:52,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:46:52,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:46:52,785 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 9 states. [2020-10-13 04:46:52,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:52,911 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2020-10-13 04:46:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:46:52,911 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-10-13 04:46:52,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:52,912 INFO L225 Difference]: With dead ends: 110 [2020-10-13 04:46:52,912 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 04:46:52,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:46:52,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 04:46:52,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-10-13 04:46:52,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 04:46:52,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-13 04:46:52,924 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 61 [2020-10-13 04:46:52,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:52,925 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-13 04:46:52,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:46:52,925 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-13 04:46:52,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 04:46:52,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:52,926 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:52,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:46:52,927 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:52,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:52,927 INFO L82 PathProgramCache]: Analyzing trace with hash -259877090, now seen corresponding path program 11 times [2020-10-13 04:46:52,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:52,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677522900] [2020-10-13 04:46:52,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:52,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:52,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:52,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:54,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:57,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:57,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 04:46:57,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:57,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:46:57,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:57,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:46:57,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 04:46:57,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:46:57,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:57,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:58,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:58,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:58,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:58,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:58,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:58,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:58,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:58,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:58,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:58,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-13 04:46:58,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677522900] [2020-10-13 04:46:58,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:58,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:46:58,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972824809] [2020-10-13 04:46:58,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:46:58,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:58,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:46:58,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:46:58,009 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 10 states. [2020-10-13 04:46:58,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:58,223 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2020-10-13 04:46:58,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:46:58,223 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-13 04:46:58,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:58,224 INFO L225 Difference]: With dead ends: 120 [2020-10-13 04:46:58,225 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 04:46:58,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:46:58,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 04:46:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-10-13 04:46:58,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 04:46:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-10-13 04:46:58,239 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 67 [2020-10-13 04:46:58,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:58,240 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-10-13 04:46:58,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:46:58,245 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-10-13 04:46:58,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 04:46:58,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:58,246 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:58,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:46:58,247 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:58,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:58,247 INFO L82 PathProgramCache]: Analyzing trace with hash 780565368, now seen corresponding path program 12 times [2020-10-13 04:46:58,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:58,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223765927] [2020-10-13 04:46:58,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:58,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:58,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:58,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:00,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:03,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:03,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 04:47:03,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:47:03,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:47:03,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:03,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:47:03,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:03,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:47:03,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:03,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:03,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:03,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:03,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:03,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:03,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:03,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:03,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:03,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:03,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:03,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:03,339 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-13 04:47:03,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223765927] [2020-10-13 04:47:03,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:03,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:47:03,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803465193] [2020-10-13 04:47:03,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:47:03,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:03,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:47:03,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:47:03,342 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 10 states. [2020-10-13 04:47:03,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:03,448 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2020-10-13 04:47:03,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:47:03,449 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2020-10-13 04:47:03,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:03,450 INFO L225 Difference]: With dead ends: 140 [2020-10-13 04:47:03,450 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 04:47:03,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:47:03,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 04:47:03,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-13 04:47:03,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 04:47:03,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-10-13 04:47:03,456 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 73 [2020-10-13 04:47:03,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:03,456 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-10-13 04:47:03,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:47:03,456 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-10-13 04:47:03,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 04:47:03,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:03,457 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:03,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:47:03,457 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:03,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:03,458 INFO L82 PathProgramCache]: Analyzing trace with hash -400848618, now seen corresponding path program 13 times [2020-10-13 04:47:03,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:03,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118870732] [2020-10-13 04:47:03,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:03,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:03,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:03,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:03,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:05,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:08,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:08,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 04:47:08,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:47:08,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:47:08,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:08,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:47:08,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 04:47:08,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:47:08,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:08,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:08,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:08,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:08,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:08,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:08,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:08,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:08,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:08,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:08,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:08,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-13 04:47:08,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118870732] [2020-10-13 04:47:08,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:08,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:47:08,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818531338] [2020-10-13 04:47:08,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:47:08,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:08,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:47:08,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:47:08,556 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 11 states. [2020-10-13 04:47:08,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:08,720 INFO L93 Difference]: Finished difference Result 132 states and 141 transitions. [2020-10-13 04:47:08,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:47:08,721 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 75 [2020-10-13 04:47:08,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:08,722 INFO L225 Difference]: With dead ends: 132 [2020-10-13 04:47:08,722 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 04:47:08,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:47:08,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 04:47:08,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2020-10-13 04:47:08,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 04:47:08,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-13 04:47:08,731 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 75 [2020-10-13 04:47:08,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:08,732 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-13 04:47:08,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:47:08,732 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-13 04:47:08,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 04:47:08,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:08,733 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:08,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:47:08,733 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:08,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:08,734 INFO L82 PathProgramCache]: Analyzing trace with hash -256126096, now seen corresponding path program 14 times [2020-10-13 04:47:08,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:08,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700355394] [2020-10-13 04:47:08,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:08,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:08,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:08,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:10,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:13,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:13,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 04:47:13,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:47:13,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 04:47:13,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:13,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:47:13,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:13,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:47:13,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:13,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:13,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:13,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:13,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:13,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:13,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:13,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:13,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:13,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:13,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:13,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:13,849 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-10-13 04:47:13,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700355394] [2020-10-13 04:47:13,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:13,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:47:13,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354146688] [2020-10-13 04:47:13,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:47:13,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:13,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:47:13,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:47:13,851 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 11 states. [2020-10-13 04:47:13,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:13,941 INFO L93 Difference]: Finished difference Result 154 states and 162 transitions. [2020-10-13 04:47:13,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:47:13,942 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 81 [2020-10-13 04:47:13,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:13,942 INFO L225 Difference]: With dead ends: 154 [2020-10-13 04:47:13,942 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 04:47:13,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:47:13,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 04:47:13,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-13 04:47:13,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 04:47:13,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-10-13 04:47:13,948 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 81 [2020-10-13 04:47:13,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:13,948 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-10-13 04:47:13,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:47:13,948 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-10-13 04:47:13,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 04:47:13,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:13,949 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:13,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:47:13,949 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:13,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:13,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1093690126, now seen corresponding path program 15 times [2020-10-13 04:47:13,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:13,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958414751] [2020-10-13 04:47:13,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:13,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:13,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:13,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:18,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:18,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 04:47:18,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:47:18,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:47:18,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:18,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:47:18,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 04:47:18,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:47:18,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:19,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:19,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:19,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:19,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:19,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:19,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:19,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:19,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:19,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:19,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:19,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-10-13 04:47:19,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958414751] [2020-10-13 04:47:19,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:19,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:47:19,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862805732] [2020-10-13 04:47:19,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:47:19,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:19,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:47:19,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:47:19,054 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 12 states. [2020-10-13 04:47:19,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:19,219 INFO L93 Difference]: Finished difference Result 144 states and 153 transitions. [2020-10-13 04:47:19,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:47:19,219 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-10-13 04:47:19,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:19,220 INFO L225 Difference]: With dead ends: 144 [2020-10-13 04:47:19,220 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 04:47:19,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:47:19,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 04:47:19,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2020-10-13 04:47:19,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 04:47:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-10-13 04:47:19,231 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 83 [2020-10-13 04:47:19,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:19,232 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-10-13 04:47:19,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:47:19,232 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-10-13 04:47:19,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 04:47:19,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:19,233 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:19,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:47:19,233 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:19,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:19,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1643582312, now seen corresponding path program 16 times [2020-10-13 04:47:19,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:19,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035646307] [2020-10-13 04:47:19,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:19,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:19,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:19,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:24,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:24,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 04:47:24,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:47:24,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 04:47:24,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:24,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:47:24,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:24,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:47:24,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:24,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:24,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:24,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:24,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:24,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:24,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:24,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:24,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:24,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:24,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:24,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-10-13 04:47:24,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035646307] [2020-10-13 04:47:24,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:24,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:47:24,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071312186] [2020-10-13 04:47:24,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:47:24,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:24,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:47:24,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:47:24,350 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 12 states. [2020-10-13 04:47:24,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:24,456 INFO L93 Difference]: Finished difference Result 168 states and 176 transitions. [2020-10-13 04:47:24,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:47:24,456 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 89 [2020-10-13 04:47:24,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:24,457 INFO L225 Difference]: With dead ends: 168 [2020-10-13 04:47:24,457 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 04:47:24,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:47:24,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 04:47:24,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-13 04:47:24,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 04:47:24,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-10-13 04:47:24,462 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 89 [2020-10-13 04:47:24,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:24,463 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-10-13 04:47:24,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:47:24,463 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-10-13 04:47:24,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 04:47:24,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:24,464 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:24,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:47:24,464 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:24,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:24,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1163320058, now seen corresponding path program 17 times [2020-10-13 04:47:24,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:24,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825369921] [2020-10-13 04:47:24,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:24,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:24,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:24,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:29,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:29,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 04:47:29,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:47:29,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 04:47:29,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:29,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:47:29,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:29,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:47:29,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:29,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:29,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:29,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:29,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:29,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:29,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:29,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:29,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:29,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:29,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:29,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-10-13 04:47:29,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825369921] [2020-10-13 04:47:29,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:29,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:47:29,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42084201] [2020-10-13 04:47:29,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:47:29,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:29,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:47:29,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:47:29,601 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 13 states. [2020-10-13 04:47:29,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:29,705 INFO L93 Difference]: Finished difference Result 170 states and 178 transitions. [2020-10-13 04:47:29,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:47:29,706 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 91 [2020-10-13 04:47:29,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:29,707 INFO L225 Difference]: With dead ends: 170 [2020-10-13 04:47:29,707 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 04:47:29,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:47:29,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 04:47:29,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-13 04:47:29,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 04:47:29,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-10-13 04:47:29,711 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 91 [2020-10-13 04:47:29,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:29,711 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-10-13 04:47:29,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:47:29,712 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-10-13 04:47:29,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 04:47:29,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:29,712 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:29,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:47:29,713 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:29,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:29,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1357035740, now seen corresponding path program 18 times [2020-10-13 04:47:29,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:29,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241316793] [2020-10-13 04:47:29,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:29,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:29,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:29,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:34,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:34,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-13 04:47:34,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:47:34,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 04:47:34,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:34,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:47:34,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 04:47:34,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:47:34,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:34,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:34,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:34,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:34,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:34,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:34,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:34,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:34,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:34,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:34,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:34,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:34,854 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2020-10-13 04:47:34,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241316793] [2020-10-13 04:47:34,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:34,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:47:34,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122887768] [2020-10-13 04:47:34,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:47:34,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:34,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:47:34,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:47:34,856 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 13 states. [2020-10-13 04:47:35,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:35,042 INFO L93 Difference]: Finished difference Result 158 states and 167 transitions. [2020-10-13 04:47:35,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:47:35,043 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 93 [2020-10-13 04:47:35,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:35,045 INFO L225 Difference]: With dead ends: 158 [2020-10-13 04:47:35,045 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 04:47:35,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:47:35,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 04:47:35,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2020-10-13 04:47:35,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 04:47:35,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-10-13 04:47:35,050 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 93 [2020-10-13 04:47:35,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:35,051 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-10-13 04:47:35,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:47:35,051 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-10-13 04:47:35,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 04:47:35,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:35,052 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:35,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:47:35,052 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:35,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:35,053 INFO L82 PathProgramCache]: Analyzing trace with hash 493735678, now seen corresponding path program 19 times [2020-10-13 04:47:35,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:35,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77562678] [2020-10-13 04:47:35,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:35,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:35,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:35,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:40,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:40,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 04:47:40,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:47:40,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 04:47:40,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:40,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:47:40,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 04:47:40,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:47:40,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:40,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:40,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:40,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:40,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:40,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:40,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:40,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:40,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:40,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:40,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:40,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:40,186 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-13 04:47:40,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77562678] [2020-10-13 04:47:40,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:40,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:47:40,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973889014] [2020-10-13 04:47:40,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:47:40,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:40,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:47:40,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:47:40,188 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 14 states. [2020-10-13 04:47:40,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:40,405 INFO L93 Difference]: Finished difference Result 168 states and 177 transitions. [2020-10-13 04:47:40,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:47:40,407 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 99 [2020-10-13 04:47:40,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:40,408 INFO L225 Difference]: With dead ends: 168 [2020-10-13 04:47:40,409 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 04:47:40,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:47:40,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 04:47:40,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2020-10-13 04:47:40,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 04:47:40,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-10-13 04:47:40,419 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 99 [2020-10-13 04:47:40,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:40,419 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-10-13 04:47:40,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:47:40,419 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-10-13 04:47:40,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 04:47:40,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:40,422 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:40,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:47:40,423 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:40,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:40,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1998539608, now seen corresponding path program 20 times [2020-10-13 04:47:40,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:40,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280122993] [2020-10-13 04:47:40,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:40,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:40,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:40,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:45,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:45,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 04:47:45,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:47:45,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 04:47:45,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:45,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:47:45,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:45,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:47:45,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:45,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:45,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:45,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:45,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:45,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:45,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:47:45,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:45,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:45,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:45,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:45,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-10-13 04:47:45,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280122993] [2020-10-13 04:47:45,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:45,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:47:45,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78448434] [2020-10-13 04:47:45,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:47:45,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:45,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:47:45,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:47:45,575 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 14 states. [2020-10-13 04:47:45,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:45,666 INFO L93 Difference]: Finished difference Result 196 states and 204 transitions. [2020-10-13 04:47:45,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:47:45,667 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 105 [2020-10-13 04:47:45,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:45,668 INFO L225 Difference]: With dead ends: 196 [2020-10-13 04:47:45,668 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 04:47:45,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:47:45,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 04:47:45,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-13 04:47:45,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 04:47:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2020-10-13 04:47:45,674 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 105 [2020-10-13 04:47:45,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:45,674 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2020-10-13 04:47:45,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:47:45,675 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2020-10-13 04:47:45,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 04:47:45,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:45,676 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:45,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:47:45,676 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:45,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:45,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1013342454, now seen corresponding path program 21 times [2020-10-13 04:47:45,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:45,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132193372] [2020-10-13 04:47:45,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:45,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:45,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:45,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:50,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:50,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 04:47:50,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:47:50,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 04:47:50,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:50,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:47:50,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:50,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:47:50,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:50,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:50,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:50,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:50,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:50,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:50,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:50,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:50,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:50,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:50,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:50,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:50,845 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-10-13 04:47:50,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132193372] [2020-10-13 04:47:50,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:50,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:47:50,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287776987] [2020-10-13 04:47:50,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:47:50,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:50,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:47:50,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:47:50,847 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 15 states. [2020-10-13 04:47:50,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:50,957 INFO L93 Difference]: Finished difference Result 198 states and 206 transitions. [2020-10-13 04:47:50,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:47:50,957 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 107 [2020-10-13 04:47:50,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:50,959 INFO L225 Difference]: With dead ends: 198 [2020-10-13 04:47:50,959 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 04:47:50,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:47:50,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 04:47:50,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-13 04:47:50,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 04:47:50,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2020-10-13 04:47:50,965 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 107 [2020-10-13 04:47:50,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:50,966 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2020-10-13 04:47:50,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:47:50,966 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2020-10-13 04:47:50,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 04:47:50,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:50,967 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:50,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:47:50,967 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:50,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:50,968 INFO L82 PathProgramCache]: Analyzing trace with hash -868317420, now seen corresponding path program 22 times [2020-10-13 04:47:50,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:50,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380721602] [2020-10-13 04:47:50,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:50,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:51,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:51,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:55,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:55,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 04:47:55,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:47:55,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:47:55,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:55,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:47:55,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 04:47:55,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:47:55,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:56,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:56,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:56,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:56,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:56,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:56,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:56,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:56,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:56,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:56,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:56,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-10-13 04:47:56,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380721602] [2020-10-13 04:47:56,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:56,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:47:56,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255779943] [2020-10-13 04:47:56,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:47:56,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:56,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:47:56,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:47:56,117 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 15 states. [2020-10-13 04:47:56,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:56,346 INFO L93 Difference]: Finished difference Result 182 states and 191 transitions. [2020-10-13 04:47:56,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:47:56,347 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 109 [2020-10-13 04:47:56,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:56,348 INFO L225 Difference]: With dead ends: 182 [2020-10-13 04:47:56,349 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 04:47:56,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:47:56,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 04:47:56,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2020-10-13 04:47:56,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 04:47:56,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-10-13 04:47:56,355 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 109 [2020-10-13 04:47:56,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:56,356 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-10-13 04:47:56,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:47:56,356 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-10-13 04:47:56,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 04:47:56,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:56,357 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:56,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:47:56,358 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:56,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:56,358 INFO L82 PathProgramCache]: Analyzing trace with hash -193275154, now seen corresponding path program 23 times [2020-10-13 04:47:56,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:56,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840873034] [2020-10-13 04:47:56,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:56,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:56,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:56,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:01,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:01,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-13 04:48:01,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:48:01,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-13 04:48:01,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:01,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:48:01,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:01,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:48:01,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:01,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:01,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:01,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:01,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:01,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:01,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:01,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:01,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:01,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:01,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:01,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2020-10-13 04:48:01,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840873034] [2020-10-13 04:48:01,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:01,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:48:01,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875074364] [2020-10-13 04:48:01,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:48:01,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:01,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:48:01,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:48:01,563 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 16 states. [2020-10-13 04:48:01,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:01,656 INFO L93 Difference]: Finished difference Result 212 states and 220 transitions. [2020-10-13 04:48:01,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:48:01,657 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 115 [2020-10-13 04:48:01,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:01,658 INFO L225 Difference]: With dead ends: 212 [2020-10-13 04:48:01,658 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 04:48:01,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:48:01,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 04:48:01,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-13 04:48:01,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 04:48:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2020-10-13 04:48:01,664 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 115 [2020-10-13 04:48:01,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:01,664 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2020-10-13 04:48:01,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:48:01,665 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2020-10-13 04:48:01,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-13 04:48:01,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:01,666 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:01,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:48:01,666 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:01,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:01,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1261305076, now seen corresponding path program 24 times [2020-10-13 04:48:01,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:01,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667684174] [2020-10-13 04:48:01,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:01,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:01,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:01,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:06,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:06,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 04:48:06,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:48:06,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-13 04:48:06,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:06,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:48:06,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 04:48:06,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:48:06,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:06,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:06,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:06,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:06,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:06,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:06,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:06,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:06,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:06,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:06,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:06,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2020-10-13 04:48:06,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667684174] [2020-10-13 04:48:06,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:06,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:48:06,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097202140] [2020-10-13 04:48:06,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:48:06,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:06,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:48:06,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:48:06,853 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 16 states. [2020-10-13 04:48:07,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:07,060 INFO L93 Difference]: Finished difference Result 194 states and 203 transitions. [2020-10-13 04:48:07,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:48:07,061 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 117 [2020-10-13 04:48:07,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:07,063 INFO L225 Difference]: With dead ends: 194 [2020-10-13 04:48:07,063 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 04:48:07,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:48:07,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 04:48:07,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2020-10-13 04:48:07,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 04:48:07,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2020-10-13 04:48:07,070 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 117 [2020-10-13 04:48:07,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:07,070 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2020-10-13 04:48:07,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:48:07,071 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2020-10-13 04:48:07,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 04:48:07,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:07,072 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:07,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:48:07,072 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:07,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:07,073 INFO L82 PathProgramCache]: Analyzing trace with hash 747846886, now seen corresponding path program 25 times [2020-10-13 04:48:07,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:07,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614412739] [2020-10-13 04:48:07,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:07,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:07,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:07,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:12,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:12,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 04:48:12,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:48:12,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:48:12,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:12,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:48:12,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-13 04:48:12,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:48:12,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:12,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:12,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:12,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:12,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:12,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:12,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:12,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:12,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:12,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:12,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:12,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2020-10-13 04:48:12,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614412739] [2020-10-13 04:48:12,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:12,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:48:12,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925801798] [2020-10-13 04:48:12,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:48:12,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:12,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:48:12,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:48:12,265 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 17 states. [2020-10-13 04:48:12,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:12,538 INFO L93 Difference]: Finished difference Result 204 states and 213 transitions. [2020-10-13 04:48:12,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:48:12,539 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 123 [2020-10-13 04:48:12,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:12,540 INFO L225 Difference]: With dead ends: 204 [2020-10-13 04:48:12,540 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 04:48:12,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:48:12,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 04:48:12,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2020-10-13 04:48:12,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-13 04:48:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2020-10-13 04:48:12,545 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 123 [2020-10-13 04:48:12,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:12,546 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2020-10-13 04:48:12,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:48:12,546 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2020-10-13 04:48:12,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-13 04:48:12,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:12,551 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:12,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:48:12,551 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:12,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:12,551 INFO L82 PathProgramCache]: Analyzing trace with hash 691006272, now seen corresponding path program 26 times [2020-10-13 04:48:12,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:12,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234516862] [2020-10-13 04:48:12,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:12,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:12,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:12,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:17,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:17,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-13 04:48:17,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:48:17,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 04:48:17,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:17,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:48:17,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:17,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:48:17,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:17,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:17,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:17,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:17,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:17,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:17,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:17,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:17,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:17,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:17,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:17,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:17,748 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2020-10-13 04:48:17,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234516862] [2020-10-13 04:48:17,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:17,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:48:17,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633311363] [2020-10-13 04:48:17,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:48:17,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:17,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:48:17,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:48:17,751 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 17 states. [2020-10-13 04:48:17,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:17,880 INFO L93 Difference]: Finished difference Result 238 states and 246 transitions. [2020-10-13 04:48:17,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:48:17,881 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 129 [2020-10-13 04:48:17,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:17,882 INFO L225 Difference]: With dead ends: 238 [2020-10-13 04:48:17,882 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 04:48:17,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:48:17,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 04:48:17,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-13 04:48:17,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 04:48:17,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2020-10-13 04:48:17,892 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 129 [2020-10-13 04:48:17,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:17,892 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2020-10-13 04:48:17,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:48:17,892 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2020-10-13 04:48:17,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 04:48:17,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:17,896 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:17,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:48:17,897 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:17,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:17,897 INFO L82 PathProgramCache]: Analyzing trace with hash -711489826, now seen corresponding path program 27 times [2020-10-13 04:48:17,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:17,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337566672] [2020-10-13 04:48:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:17,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:17,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:17,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:22,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:22,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 04:48:22,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:48:22,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 04:48:22,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:22,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:48:22,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 04:48:22,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:48:22,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:23,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:23,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:23,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:23,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:23,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:23,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:23,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:23,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:23,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:23,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:23,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:23,099 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2020-10-13 04:48:23,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337566672] [2020-10-13 04:48:23,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:23,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:48:23,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094560253] [2020-10-13 04:48:23,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:48:23,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:23,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:48:23,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:48:23,101 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 18 states. [2020-10-13 04:48:23,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:23,378 INFO L93 Difference]: Finished difference Result 216 states and 225 transitions. [2020-10-13 04:48:23,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:48:23,378 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 131 [2020-10-13 04:48:23,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:23,380 INFO L225 Difference]: With dead ends: 216 [2020-10-13 04:48:23,380 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 04:48:23,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:48:23,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 04:48:23,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-10-13 04:48:23,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 04:48:23,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2020-10-13 04:48:23,386 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 131 [2020-10-13 04:48:23,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:23,387 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2020-10-13 04:48:23,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:48:23,387 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2020-10-13 04:48:23,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 04:48:23,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:23,388 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:23,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:48:23,388 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:23,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:23,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1550410952, now seen corresponding path program 28 times [2020-10-13 04:48:23,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:23,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347696217] [2020-10-13 04:48:23,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:23,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:23,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:23,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:28,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:28,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 04:48:28,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:48:28,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:48:28,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:28,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:48:28,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:28,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:48:28,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:28,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:28,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:28,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:28,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:28,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:28,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:48:28,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:28,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:28,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:28,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:28,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2020-10-13 04:48:28,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347696217] [2020-10-13 04:48:28,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:28,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:48:28,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55049520] [2020-10-13 04:48:28,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:48:28,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:28,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:48:28,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:48:28,595 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 18 states. [2020-10-13 04:48:28,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:28,704 INFO L93 Difference]: Finished difference Result 252 states and 260 transitions. [2020-10-13 04:48:28,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:48:28,704 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 137 [2020-10-13 04:48:28,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:28,706 INFO L225 Difference]: With dead ends: 252 [2020-10-13 04:48:28,706 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 04:48:28,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:48:28,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 04:48:28,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2020-10-13 04:48:28,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-13 04:48:28,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2020-10-13 04:48:28,714 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 137 [2020-10-13 04:48:28,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:28,714 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2020-10-13 04:48:28,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:48:28,714 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2020-10-13 04:48:28,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-13 04:48:28,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:28,715 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:28,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:48:28,715 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:28,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:28,716 INFO L82 PathProgramCache]: Analyzing trace with hash -361776938, now seen corresponding path program 29 times [2020-10-13 04:48:28,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:28,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460134580] [2020-10-13 04:48:28,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:28,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:28,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:28,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:33,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:33,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-13 04:48:33,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:48:33,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5102 [2020-10-13 04:48:33,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:33,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:48:33,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:33,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:48:33,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:34,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:34,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:34,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:34,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:34,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:34,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:34,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:34,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:34,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:34,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:34,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2020-10-13 04:48:34,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460134580] [2020-10-13 04:48:34,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:34,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:48:34,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847756829] [2020-10-13 04:48:34,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:48:34,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:34,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:48:34,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:48:34,045 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand 19 states. [2020-10-13 04:48:34,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:34,172 INFO L93 Difference]: Finished difference Result 254 states and 262 transitions. [2020-10-13 04:48:34,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:48:34,172 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 139 [2020-10-13 04:48:34,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:34,173 INFO L225 Difference]: With dead ends: 254 [2020-10-13 04:48:34,174 INFO L226 Difference]: Without dead ends: 147 [2020-10-13 04:48:34,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:48:34,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-13 04:48:34,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2020-10-13 04:48:34,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-13 04:48:34,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2020-10-13 04:48:34,180 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 139 [2020-10-13 04:48:34,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:34,180 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2020-10-13 04:48:34,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:48:34,180 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2020-10-13 04:48:34,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-13 04:48:34,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:34,181 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:34,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:48:34,182 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:34,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:34,182 INFO L82 PathProgramCache]: Analyzing trace with hash -545790220, now seen corresponding path program 30 times [2020-10-13 04:48:34,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:34,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213671147] [2020-10-13 04:48:34,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:34,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:34,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:34,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:39,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:39,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-13 04:48:39,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:48:39,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-13 04:48:39,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:39,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:48:39,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 04:48:39,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:48:39,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:39,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:39,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:39,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:39,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:39,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:39,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:39,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:39,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:39,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:39,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:39,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2020-10-13 04:48:39,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213671147] [2020-10-13 04:48:39,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:39,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:48:39,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495504006] [2020-10-13 04:48:39,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:48:39,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:39,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:48:39,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:48:39,425 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand 19 states. [2020-10-13 04:48:39,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:39,714 INFO L93 Difference]: Finished difference Result 230 states and 239 transitions. [2020-10-13 04:48:39,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:48:39,714 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 141 [2020-10-13 04:48:39,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:39,716 INFO L225 Difference]: With dead ends: 230 [2020-10-13 04:48:39,716 INFO L226 Difference]: Without dead ends: 155 [2020-10-13 04:48:39,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:48:39,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-13 04:48:39,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-10-13 04:48:39,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-13 04:48:39,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2020-10-13 04:48:39,723 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 141 [2020-10-13 04:48:39,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:39,724 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2020-10-13 04:48:39,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:48:39,724 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2020-10-13 04:48:39,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 04:48:39,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:39,725 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:39,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:48:39,725 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:39,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:39,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1879298766, now seen corresponding path program 31 times [2020-10-13 04:48:39,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:39,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725551386] [2020-10-13 04:48:39,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:39,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:39,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:39,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:39,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:44,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:44,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 04:48:44,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:48:44,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-13 04:48:44,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:44,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:48:44,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:44,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:48:44,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:44,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:44,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:44,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:44,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:44,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:44,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:44,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:44,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:44,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:44,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:44,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:44,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2020-10-13 04:48:44,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725551386] [2020-10-13 04:48:44,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:44,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:48:44,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823115926] [2020-10-13 04:48:44,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:48:44,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:44,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:48:44,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:48:44,997 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 20 states. [2020-10-13 04:48:45,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:45,105 INFO L93 Difference]: Finished difference Result 268 states and 276 transitions. [2020-10-13 04:48:45,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:48:45,106 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 147 [2020-10-13 04:48:45,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:45,108 INFO L225 Difference]: With dead ends: 268 [2020-10-13 04:48:45,108 INFO L226 Difference]: Without dead ends: 155 [2020-10-13 04:48:45,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:48:45,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-13 04:48:45,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2020-10-13 04:48:45,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-13 04:48:45,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2020-10-13 04:48:45,119 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 147 [2020-10-13 04:48:45,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:45,119 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2020-10-13 04:48:45,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:48:45,120 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2020-10-13 04:48:45,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-13 04:48:45,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:45,121 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:45,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:48:45,122 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:45,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:45,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1996291348, now seen corresponding path program 32 times [2020-10-13 04:48:45,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:45,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029344894] [2020-10-13 04:48:45,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:45,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:45,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:45,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:50,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:50,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-13 04:48:50,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:48:50,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-13 04:48:50,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:50,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:48:50,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 04:48:50,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:48:50,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:50,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:50,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:50,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:50,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:50,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:50,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:50,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:50,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:50,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:50,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:50,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2020-10-13 04:48:50,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029344894] [2020-10-13 04:48:50,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:50,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:48:50,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179331902] [2020-10-13 04:48:50,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:48:50,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:50,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:48:50,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:48:50,428 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand 20 states. [2020-10-13 04:48:50,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:50,733 INFO L93 Difference]: Finished difference Result 242 states and 251 transitions. [2020-10-13 04:48:50,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:48:50,734 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 149 [2020-10-13 04:48:50,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:50,735 INFO L225 Difference]: With dead ends: 242 [2020-10-13 04:48:50,735 INFO L226 Difference]: Without dead ends: 163 [2020-10-13 04:48:50,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:48:50,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-13 04:48:50,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 160. [2020-10-13 04:48:50,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 04:48:50,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2020-10-13 04:48:50,745 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 149 [2020-10-13 04:48:50,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:50,745 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2020-10-13 04:48:50,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:48:50,745 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2020-10-13 04:48:50,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-13 04:48:50,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:50,747 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:50,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:48:50,748 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:50,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:50,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1966855366, now seen corresponding path program 33 times [2020-10-13 04:48:50,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:50,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984968861] [2020-10-13 04:48:50,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:50,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:50,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:50,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:55,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:55,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-13 04:48:55,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:48:55,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5117 [2020-10-13 04:48:55,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:55,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:48:55,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 04:48:55,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:48:55,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:56,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:56,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:56,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:56,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:56,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:56,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:56,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:56,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:56,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:56,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:56,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 867 trivial. 0 not checked. [2020-10-13 04:48:56,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984968861] [2020-10-13 04:48:56,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:56,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:48:56,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507023433] [2020-10-13 04:48:56,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:48:56,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:56,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:48:56,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:48:56,115 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand 21 states. [2020-10-13 04:48:56,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:56,428 INFO L93 Difference]: Finished difference Result 252 states and 261 transitions. [2020-10-13 04:48:56,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:48:56,429 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 155 [2020-10-13 04:48:56,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:56,430 INFO L225 Difference]: With dead ends: 252 [2020-10-13 04:48:56,431 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 04:48:56,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:48:56,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 04:48:56,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2020-10-13 04:48:56,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-13 04:48:56,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 170 transitions. [2020-10-13 04:48:56,438 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 170 transitions. Word has length 155 [2020-10-13 04:48:56,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:56,438 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 170 transitions. [2020-10-13 04:48:56,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:48:56,438 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 170 transitions. [2020-10-13 04:48:56,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-13 04:48:56,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:56,439 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:56,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:48:56,440 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:56,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:56,440 INFO L82 PathProgramCache]: Analyzing trace with hash 2023627552, now seen corresponding path program 34 times [2020-10-13 04:48:56,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:56,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537047408] [2020-10-13 04:48:56,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:56,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:56,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:56,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:01,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:01,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-13 04:49:01,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:49:01,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-13 04:49:01,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:49:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:49:01,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:01,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:01,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:01,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:01,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:01,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:01,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:01,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:01,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:01,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:01,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:01,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:49:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2020-10-13 04:49:01,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537047408] [2020-10-13 04:49:01,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:01,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:49:01,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878112349] [2020-10-13 04:49:01,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:49:01,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:01,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:49:01,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:49:01,833 INFO L87 Difference]: Start difference. First operand 166 states and 170 transitions. Second operand 21 states. [2020-10-13 04:49:02,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:02,033 INFO L93 Difference]: Finished difference Result 294 states and 302 transitions. [2020-10-13 04:49:02,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:49:02,034 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 161 [2020-10-13 04:49:02,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:02,038 INFO L225 Difference]: With dead ends: 294 [2020-10-13 04:49:02,038 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 04:49:02,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:49:02,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 04:49:02,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2020-10-13 04:49:02,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-13 04:49:02,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2020-10-13 04:49:02,052 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 161 [2020-10-13 04:49:02,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:02,053 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2020-10-13 04:49:02,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:49:02,053 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2020-10-13 04:49:02,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-13 04:49:02,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:02,056 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:02,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:49:02,056 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:02,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:02,057 INFO L82 PathProgramCache]: Analyzing trace with hash 318750398, now seen corresponding path program 35 times [2020-10-13 04:49:02,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:02,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355511465] [2020-10-13 04:49:02,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:02,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:02,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:02,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:07,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:07,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-13 04:49:07,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:49:07,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5144 [2020-10-13 04:49:07,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:07,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:49:07,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-13 04:49:07,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:49:07,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:07,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:07,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:07,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:07,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:07,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:07,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:07,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:07,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:07,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:07,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:07,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2020-10-13 04:49:07,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355511465] [2020-10-13 04:49:07,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:07,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:49:07,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546361964] [2020-10-13 04:49:07,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:49:07,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:07,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:49:07,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:49:07,546 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand 22 states. [2020-10-13 04:49:07,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:07,822 INFO L93 Difference]: Finished difference Result 264 states and 273 transitions. [2020-10-13 04:49:07,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:49:07,822 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 163 [2020-10-13 04:49:07,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:07,823 INFO L225 Difference]: With dead ends: 264 [2020-10-13 04:49:07,823 INFO L226 Difference]: Without dead ends: 177 [2020-10-13 04:49:07,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:49:07,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-13 04:49:07,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2020-10-13 04:49:07,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-13 04:49:07,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2020-10-13 04:49:07,831 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 163 [2020-10-13 04:49:07,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:07,832 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2020-10-13 04:49:07,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:49:07,832 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2020-10-13 04:49:07,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-13 04:49:07,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:07,833 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:07,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:49:07,833 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:07,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:07,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1377015016, now seen corresponding path program 36 times [2020-10-13 04:49:07,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:07,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120351032] [2020-10-13 04:49:07,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:07,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:07,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:07,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:12,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:12,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-13 04:49:12,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:49:12,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-13 04:49:12,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:12,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:49:12,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:12,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:49:12,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:13,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:13,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:13,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:13,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:13,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:13,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:13,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:13,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:13,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:13,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:13,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:13,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1407 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2020-10-13 04:49:13,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120351032] [2020-10-13 04:49:13,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:13,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:49:13,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078559550] [2020-10-13 04:49:13,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:49:13,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:13,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:49:13,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:49:13,165 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand 22 states. [2020-10-13 04:49:13,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:13,290 INFO L93 Difference]: Finished difference Result 308 states and 316 transitions. [2020-10-13 04:49:13,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:49:13,290 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 169 [2020-10-13 04:49:13,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:13,291 INFO L225 Difference]: With dead ends: 308 [2020-10-13 04:49:13,292 INFO L226 Difference]: Without dead ends: 177 [2020-10-13 04:49:13,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:49:13,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-13 04:49:13,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2020-10-13 04:49:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-13 04:49:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2020-10-13 04:49:13,298 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 169 [2020-10-13 04:49:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:13,298 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2020-10-13 04:49:13,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:49:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2020-10-13 04:49:13,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 04:49:13,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:13,300 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:13,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:49:13,300 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:13,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:13,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1815580854, now seen corresponding path program 37 times [2020-10-13 04:49:13,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:13,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542904272] [2020-10-13 04:49:13,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:13,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:13,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:13,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:18,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:18,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 04:49:18,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:49:18,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 04:49:18,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:18,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:49:18,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 04:49:18,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:49:18,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:18,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:18,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:18,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:18,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:18,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:18,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:18,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:18,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:18,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:18,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:18,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2020-10-13 04:49:18,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542904272] [2020-10-13 04:49:18,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:18,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:49:18,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418623729] [2020-10-13 04:49:18,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:49:18,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:18,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:49:18,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:49:18,622 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand 23 states. [2020-10-13 04:49:18,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:18,999 INFO L93 Difference]: Finished difference Result 276 states and 285 transitions. [2020-10-13 04:49:18,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:49:18,999 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 171 [2020-10-13 04:49:19,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:19,001 INFO L225 Difference]: With dead ends: 276 [2020-10-13 04:49:19,001 INFO L226 Difference]: Without dead ends: 185 [2020-10-13 04:49:19,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:49:19,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-13 04:49:19,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2020-10-13 04:49:19,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-13 04:49:19,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2020-10-13 04:49:19,007 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 171 [2020-10-13 04:49:19,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:19,007 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2020-10-13 04:49:19,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:49:19,007 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2020-10-13 04:49:19,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-13 04:49:19,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:19,009 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:19,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:49:19,009 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:19,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:19,009 INFO L82 PathProgramCache]: Analyzing trace with hash 70820624, now seen corresponding path program 38 times [2020-10-13 04:49:19,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:19,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571336320] [2020-10-13 04:49:19,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:19,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:19,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:19,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:24,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:24,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-13 04:49:24,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:49:24,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:49:24,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:49:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:49:24,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:24,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:24,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:24,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:24,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:24,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:24,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:24,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:24,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:24,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:24,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:24,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1561 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-10-13 04:49:24,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571336320] [2020-10-13 04:49:24,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:24,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:49:24,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830943752] [2020-10-13 04:49:24,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:49:24,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:24,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:49:24,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:49:24,304 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand 23 states. [2020-10-13 04:49:24,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:24,479 INFO L93 Difference]: Finished difference Result 322 states and 330 transitions. [2020-10-13 04:49:24,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:49:24,479 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 177 [2020-10-13 04:49:24,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:24,480 INFO L225 Difference]: With dead ends: 322 [2020-10-13 04:49:24,480 INFO L226 Difference]: Without dead ends: 185 [2020-10-13 04:49:24,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:49:24,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-13 04:49:24,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2020-10-13 04:49:24,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 04:49:24,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2020-10-13 04:49:24,489 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 177 [2020-10-13 04:49:24,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:24,490 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2020-10-13 04:49:24,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:49:24,490 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2020-10-13 04:49:24,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-13 04:49:24,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:24,491 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:24,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:49:24,491 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:24,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:24,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1379186002, now seen corresponding path program 39 times [2020-10-13 04:49:24,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:24,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922003684] [2020-10-13 04:49:24,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:24,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:24,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:24,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:29,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:29,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-13 04:49:29,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:49:29,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-13 04:49:29,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:29,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:49:29,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 04:49:29,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:49:29,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:29,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:29,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:29,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:29,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:29,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:29,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:29,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:29,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:29,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:29,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:29,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-10-13 04:49:29,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922003684] [2020-10-13 04:49:29,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:29,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:49:29,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51396626] [2020-10-13 04:49:29,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:49:29,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:29,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:49:29,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:49:29,861 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand 24 states. [2020-10-13 04:49:30,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:30,185 INFO L93 Difference]: Finished difference Result 288 states and 297 transitions. [2020-10-13 04:49:30,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:49:30,186 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 179 [2020-10-13 04:49:30,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:30,187 INFO L225 Difference]: With dead ends: 288 [2020-10-13 04:49:30,187 INFO L226 Difference]: Without dead ends: 193 [2020-10-13 04:49:30,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:49:30,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-13 04:49:30,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 190. [2020-10-13 04:49:30,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-13 04:49:30,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2020-10-13 04:49:30,195 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 179 [2020-10-13 04:49:30,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:30,195 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2020-10-13 04:49:30,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:49:30,195 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2020-10-13 04:49:30,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-13 04:49:30,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:30,197 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:30,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:49:30,197 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:30,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:30,198 INFO L82 PathProgramCache]: Analyzing trace with hash -261438712, now seen corresponding path program 40 times [2020-10-13 04:49:30,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:30,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915360346] [2020-10-13 04:49:30,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:30,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:30,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:30,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:35,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:35,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-13 04:49:35,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:49:35,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5102 [2020-10-13 04:49:35,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:35,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:49:35,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:35,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:49:35,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:35,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:35,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:35,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:35,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:35,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:35,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:35,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:35,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:35,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:35,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:35,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1723 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1323 trivial. 0 not checked. [2020-10-13 04:49:35,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915360346] [2020-10-13 04:49:35,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:35,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:49:35,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688889022] [2020-10-13 04:49:35,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:49:35,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:35,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:49:35,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:49:35,646 INFO L87 Difference]: Start difference. First operand 190 states and 194 transitions. Second operand 24 states. [2020-10-13 04:49:35,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:35,783 INFO L93 Difference]: Finished difference Result 336 states and 344 transitions. [2020-10-13 04:49:35,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:49:35,784 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 185 [2020-10-13 04:49:35,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:35,785 INFO L225 Difference]: With dead ends: 336 [2020-10-13 04:49:35,785 INFO L226 Difference]: Without dead ends: 193 [2020-10-13 04:49:35,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:49:35,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-13 04:49:35,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2020-10-13 04:49:35,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-13 04:49:35,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2020-10-13 04:49:35,793 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 185 [2020-10-13 04:49:35,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:35,793 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2020-10-13 04:49:35,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:49:35,793 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2020-10-13 04:49:35,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-13 04:49:35,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:35,795 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:35,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 04:49:35,795 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:35,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:35,795 INFO L82 PathProgramCache]: Analyzing trace with hash 245558438, now seen corresponding path program 41 times [2020-10-13 04:49:35,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:35,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123248875] [2020-10-13 04:49:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:35,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:35,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:35,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:40,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:40,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-13 04:49:40,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:49:40,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-13 04:49:40,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:40,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:49:40,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:40,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:49:40,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:41,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:41,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:41,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:41,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:41,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:41,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:41,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:41,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:41,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:41,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:41,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:49:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1323 trivial. 0 not checked. [2020-10-13 04:49:41,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123248875] [2020-10-13 04:49:41,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:41,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:49:41,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951689780] [2020-10-13 04:49:41,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:49:41,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:41,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:49:41,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:49:41,198 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand 25 states. [2020-10-13 04:49:41,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:41,379 INFO L93 Difference]: Finished difference Result 338 states and 346 transitions. [2020-10-13 04:49:41,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:49:41,380 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 187 [2020-10-13 04:49:41,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:41,381 INFO L225 Difference]: With dead ends: 338 [2020-10-13 04:49:41,382 INFO L226 Difference]: Without dead ends: 195 [2020-10-13 04:49:41,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:49:41,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-13 04:49:41,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2020-10-13 04:49:41,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-13 04:49:41,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2020-10-13 04:49:41,388 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 187 [2020-10-13 04:49:41,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:41,388 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2020-10-13 04:49:41,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:49:41,389 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2020-10-13 04:49:41,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-13 04:49:41,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:41,390 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:41,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 04:49:41,390 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:41,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:41,390 INFO L82 PathProgramCache]: Analyzing trace with hash 2138515140, now seen corresponding path program 42 times [2020-10-13 04:49:41,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:41,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166010068] [2020-10-13 04:49:41,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:41,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:41,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:41,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:46,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:46,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-13 04:49:46,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:49:46,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-13 04:49:46,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:46,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:49:46,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 04:49:46,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:49:46,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:46,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:46,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:46,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:46,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:46,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:46,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:46,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:46,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:46,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:46,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:46,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2020-10-13 04:49:46,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166010068] [2020-10-13 04:49:46,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:46,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:49:46,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840841664] [2020-10-13 04:49:46,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:49:46,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:46,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:49:46,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:49:46,776 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand 25 states. [2020-10-13 04:49:47,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:47,135 INFO L93 Difference]: Finished difference Result 302 states and 311 transitions. [2020-10-13 04:49:47,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:49:47,136 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 189 [2020-10-13 04:49:47,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:47,138 INFO L225 Difference]: With dead ends: 302 [2020-10-13 04:49:47,138 INFO L226 Difference]: Without dead ends: 203 [2020-10-13 04:49:47,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:49:47,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-13 04:49:47,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 200. [2020-10-13 04:49:47,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-13 04:49:47,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2020-10-13 04:49:47,146 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 189 [2020-10-13 04:49:47,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:47,146 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2020-10-13 04:49:47,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:49:47,146 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2020-10-13 04:49:47,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-13 04:49:47,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:47,147 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:47,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 04:49:47,148 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:47,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:47,148 INFO L82 PathProgramCache]: Analyzing trace with hash -811174242, now seen corresponding path program 43 times [2020-10-13 04:49:47,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:47,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035123550] [2020-10-13 04:49:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:47,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:47,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:47,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:52,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:52,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-13 04:49:52,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:49:52,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:49:52,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:52,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:49:52,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 04:49:52,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:49:52,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:52,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:52,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:52,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:52,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:52,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:52,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:52,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:52,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:52,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:52,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:52,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:49:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1452 trivial. 0 not checked. [2020-10-13 04:49:52,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035123550] [2020-10-13 04:49:52,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:52,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:49:52,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427412292] [2020-10-13 04:49:52,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:49:52,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:52,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:49:52,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:49:52,596 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand 26 states. [2020-10-13 04:49:52,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:52,968 INFO L93 Difference]: Finished difference Result 312 states and 321 transitions. [2020-10-13 04:49:52,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:49:52,969 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 195 [2020-10-13 04:49:52,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:52,970 INFO L225 Difference]: With dead ends: 312 [2020-10-13 04:49:52,970 INFO L226 Difference]: Without dead ends: 209 [2020-10-13 04:49:52,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:49:52,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-13 04:49:52,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 206. [2020-10-13 04:49:52,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-13 04:49:52,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 210 transitions. [2020-10-13 04:49:52,977 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 210 transitions. Word has length 195 [2020-10-13 04:49:52,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:52,978 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 210 transitions. [2020-10-13 04:49:52,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:49:52,978 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 210 transitions. [2020-10-13 04:49:52,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-13 04:49:52,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:52,979 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:52,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 04:49:52,980 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:52,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:52,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1876903176, now seen corresponding path program 44 times [2020-10-13 04:49:52,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:52,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185251483] [2020-10-13 04:49:52,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:52,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:53,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:53,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:53,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:58,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:58,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-13 04:49:58,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:49:58,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5117 [2020-10-13 04:49:58,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:58,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:49:58,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:58,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:49:58,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:58,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:58,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:58,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:58,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:58,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:58,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:58,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:58,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:58,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:58,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:58,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2071 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2020-10-13 04:49:58,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185251483] [2020-10-13 04:49:58,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:58,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:49:58,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159707286] [2020-10-13 04:49:58,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:49:58,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:58,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:49:58,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:49:58,474 INFO L87 Difference]: Start difference. First operand 206 states and 210 transitions. Second operand 26 states. [2020-10-13 04:49:58,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:58,653 INFO L93 Difference]: Finished difference Result 364 states and 372 transitions. [2020-10-13 04:49:58,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:49:58,654 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 201 [2020-10-13 04:49:58,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:58,655 INFO L225 Difference]: With dead ends: 364 [2020-10-13 04:49:58,655 INFO L226 Difference]: Without dead ends: 209 [2020-10-13 04:49:58,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:49:58,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-13 04:49:58,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2020-10-13 04:49:58,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-13 04:49:58,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 212 transitions. [2020-10-13 04:49:58,662 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 212 transitions. Word has length 201 [2020-10-13 04:49:58,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:58,663 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 212 transitions. [2020-10-13 04:49:58,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:49:58,663 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 212 transitions. [2020-10-13 04:49:58,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-13 04:49:58,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:58,664 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:58,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 04:49:58,665 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:58,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:58,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1002301590, now seen corresponding path program 45 times [2020-10-13 04:49:58,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:58,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630018739] [2020-10-13 04:49:58,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:58,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:58,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:58,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:58,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:03,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:03,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-13 04:50:03,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:50:03,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 04:50:03,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:03,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:50:03,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 04:50:03,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:50:03,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:04,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:04,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:04,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:04,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:04,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:04,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:04,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:04,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:04,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:04,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:04,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2020-10-13 04:50:04,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630018739] [2020-10-13 04:50:04,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:04,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:50:04,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879854172] [2020-10-13 04:50:04,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:50:04,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:04,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:50:04,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:50:04,085 INFO L87 Difference]: Start difference. First operand 208 states and 212 transitions. Second operand 27 states. [2020-10-13 04:50:04,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:04,495 INFO L93 Difference]: Finished difference Result 324 states and 333 transitions. [2020-10-13 04:50:04,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:50:04,496 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 203 [2020-10-13 04:50:04,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:04,498 INFO L225 Difference]: With dead ends: 324 [2020-10-13 04:50:04,498 INFO L226 Difference]: Without dead ends: 217 [2020-10-13 04:50:04,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:50:04,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-13 04:50:04,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 214. [2020-10-13 04:50:04,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-13 04:50:04,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 218 transitions. [2020-10-13 04:50:04,506 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 218 transitions. Word has length 203 [2020-10-13 04:50:04,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:04,506 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 218 transitions. [2020-10-13 04:50:04,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:50:04,506 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 218 transitions. [2020-10-13 04:50:04,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-13 04:50:04,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:04,508 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:04,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 04:50:04,508 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:04,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:04,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1601475312, now seen corresponding path program 46 times [2020-10-13 04:50:04,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:04,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970214684] [2020-10-13 04:50:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:04,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:04,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:04,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking...