/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/nested_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:46:14,369 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:46:14,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:46:14,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:46:14,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:46:14,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:46:14,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:46:14,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:46:14,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:46:14,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:46:14,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:46:14,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:46:14,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:46:14,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:46:14,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:46:14,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:46:14,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:46:14,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:46:14,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:46:14,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:46:14,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:46:14,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:46:14,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:46:14,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:46:14,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:46:14,432 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:46:14,432 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:46:14,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:46:14,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:46:14,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:46:14,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:46:14,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:46:14,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:46:14,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:46:14,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:46:14,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:46:14,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:46:14,438 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:46:14,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:46:14,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:46:14,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:46:14,441 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 [2020-10-14 23:46:14,464 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:46:14,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:46:14,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:46:14,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:46:14,467 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:46:14,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:46:14,467 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:46:14,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:46:14,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:46:14,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:46:14,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:46:14,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:46:14,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:46:14,468 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:46:14,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:46:14,469 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:46:14,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:46:14,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:46:14,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:46:14,470 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:46:14,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:46:14,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:46:14,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:46:14,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:46:14,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:46:14,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:46:14,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:46:14,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:46:14,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:46:14,472 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:46:14,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:46:14,780 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:46:14,783 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:46:14,785 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:46:14,785 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:46:14,786 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2020-10-14 23:46:14,861 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2ef672a6/fafe6e22aef54f8aac7a4d0e4b5a6622/FLAGc20629543 [2020-10-14 23:46:15,341 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:46:15,341 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2020-10-14 23:46:15,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2ef672a6/fafe6e22aef54f8aac7a4d0e4b5a6622/FLAGc20629543 [2020-10-14 23:46:15,728 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2ef672a6/fafe6e22aef54f8aac7a4d0e4b5a6622 [2020-10-14 23:46:15,737 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:46:15,738 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:46:15,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:46:15,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:46:15,743 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:46:15,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:46:15" (1/1) ... [2020-10-14 23:46:15,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@709958c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:15, skipping insertion in model container [2020-10-14 23:46:15,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:46:15" (1/1) ... [2020-10-14 23:46:15,755 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:46:15,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:46:15,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:46:15,954 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:46:15,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:46:15,996 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:46:15,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:15 WrapperNode [2020-10-14 23:46:15,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:46:15,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:46:15,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:46:15,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:46:16,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:15" (1/1) ... [2020-10-14 23:46:16,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:15" (1/1) ... [2020-10-14 23:46:16,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:15" (1/1) ... [2020-10-14 23:46:16,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:15" (1/1) ... [2020-10-14 23:46:16,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:15" (1/1) ... [2020-10-14 23:46:16,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:15" (1/1) ... [2020-10-14 23:46:16,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:15" (1/1) ... [2020-10-14 23:46:16,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:46:16,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:46:16,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:46:16,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:46:16,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:15" (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 [2020-10-14 23:46:16,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:46:16,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:46:16,170 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 23:46:16,170 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:46:16,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:46:16,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 23:46:16,171 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:46:16,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:46:16,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:46:16,378 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:46:16,378 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 23:46:16,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:46:16 BoogieIcfgContainer [2020-10-14 23:46:16,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:46:16,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:46:16,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:46:16,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:46:16,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:46:15" (1/3) ... [2020-10-14 23:46:16,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc57748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:46:16, skipping insertion in model container [2020-10-14 23:46:16,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:15" (2/3) ... [2020-10-14 23:46:16,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc57748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:46:16, skipping insertion in model container [2020-10-14 23:46:16,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:46:16" (3/3) ... [2020-10-14 23:46:16,392 INFO L109 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2020-10-14 23:46:16,400 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:46:16,410 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:46:16,420 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:46:16,439 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:46:16,439 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:46:16,439 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:46:16,440 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:46:16,440 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:46:16,440 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:46:16,440 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:46:16,440 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:46:16,456 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-14 23:46:16,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 23:46:16,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:16,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:16,462 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:16,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:16,467 INFO L82 PathProgramCache]: Analyzing trace with hash -873786703, now seen corresponding path program 1 times [2020-10-14 23:46:16,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:16,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170048327] [2020-10-14 23:46:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:16,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:16,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:16,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 23:46:16,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:16,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-14 23:46:16,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:16,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:16,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:46:16,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:16,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:46:16,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:46:16,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:16,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:16,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:16,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:16,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:16,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 23:46:16,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:16,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:16,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:16,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:16,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:16,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:16,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170048327] [2020-10-14 23:46:16,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:46:16,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 23:46:16,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610853002] [2020-10-14 23:46:16,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 23:46:16,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:16,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 23:46:16,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:46:16,872 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-10-14 23:46:16,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:16,940 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2020-10-14 23:46:16,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 23:46:16,942 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-14 23:46:16,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:16,951 INFO L225 Difference]: With dead ends: 36 [2020-10-14 23:46:16,951 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 23:46:16,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:46:16,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 23:46:16,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-10-14 23:46:16,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 23:46:16,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-14 23:46:16,989 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-14 23:46:16,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:16,989 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-14 23:46:16,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 23:46:16,989 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-14 23:46:16,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 23:46:16,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:16,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:16,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:46:16,991 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:16,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:16,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1621360120, now seen corresponding path program 1 times [2020-10-14 23:46:16,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:16,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133987130] [2020-10-14 23:46:16,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:17,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:17,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:17,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:17,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:17,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:17,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 23:46:17,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:46:17,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 428 [2020-10-14 23:46:17,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:17,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:17,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:46:17,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:17,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:46:17,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:46:19,810 WARN L193 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 92 DAG size of output: 13 [2020-10-14 23:46:19,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:19,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:19,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:19,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:19,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:19,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:46:19,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:19,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:19,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:19,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:19,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:19,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:19,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133987130] [2020-10-14 23:46:19,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:19,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:46:19,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768576235] [2020-10-14 23:46:19,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:46:19,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:19,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:46:19,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:46:19,855 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 6 states. [2020-10-14 23:46:19,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:19,922 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-10-14 23:46:19,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:46:19,923 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-14 23:46:19,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:19,924 INFO L225 Difference]: With dead ends: 24 [2020-10-14 23:46:19,924 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 23:46:19,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:46:19,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 23:46:19,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-10-14 23:46:19,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 23:46:19,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-14 23:46:19,932 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2020-10-14 23:46:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:19,932 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-14 23:46:19,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:46:19,932 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-14 23:46:19,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:46:19,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:19,933 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:19,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:46:19,934 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:19,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:19,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1541372241, now seen corresponding path program 2 times [2020-10-14 23:46:19,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:19,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123327786] [2020-10-14 23:46:19,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:19,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:19,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:19,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:20,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:20,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:20,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:46:20,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:46:20,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 552 [2020-10-14 23:46:20,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:20,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:20,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:46:20,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:20,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:46:20,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:20,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:20,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:20,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:20,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:20,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:20,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:46:20,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:20,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:20,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:20,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:20,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:20,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:20,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:20,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123327786] [2020-10-14 23:46:20,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:20,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:46:20,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866475775] [2020-10-14 23:46:20,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:46:20,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:20,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:46:20,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:46:20,584 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2020-10-14 23:46:20,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:20,628 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-10-14 23:46:20,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:46:20,630 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-14 23:46:20,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:20,631 INFO L225 Difference]: With dead ends: 27 [2020-10-14 23:46:20,632 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 23:46:20,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:46:20,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 23:46:20,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-10-14 23:46:20,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 23:46:20,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-14 23:46:20,642 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 16 [2020-10-14 23:46:20,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:20,643 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-14 23:46:20,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:46:20,643 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-14 23:46:20,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:46:20,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:20,644 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:20,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:46:20,645 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:20,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:20,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1965649064, now seen corresponding path program 3 times [2020-10-14 23:46:20,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:20,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506374572] [2020-10-14 23:46:20,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:20,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:20,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:20,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:20,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:20,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:21,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:21,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:21,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:21,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:46:21,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:46:21,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1093 [2020-10-14 23:46:21,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:21,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:21,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:46:21,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:21,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:46:21,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:46:21,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:21,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:21,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:21,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:21,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:21,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:21,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:21,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:21,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:21,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:21,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:21,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:21,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506374572] [2020-10-14 23:46:21,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:21,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:46:21,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010617056] [2020-10-14 23:46:21,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:46:21,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:21,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:46:21,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:46:21,989 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 8 states. [2020-10-14 23:46:22,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:22,126 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-10-14 23:46:22,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:46:22,127 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-14 23:46:22,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:22,129 INFO L225 Difference]: With dead ends: 30 [2020-10-14 23:46:22,129 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 23:46:22,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:46:22,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 23:46:22,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-14 23:46:22,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 23:46:22,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-14 23:46:22,145 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 19 [2020-10-14 23:46:22,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:22,146 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-14 23:46:22,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:46:22,146 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-14 23:46:22,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:46:22,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:22,148 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:22,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:46:22,149 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:22,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:22,150 INFO L82 PathProgramCache]: Analyzing trace with hash -262903823, now seen corresponding path program 4 times [2020-10-14 23:46:22,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:22,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854350707] [2020-10-14 23:46:22,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:22,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:22,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:22,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:22,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:22,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:22,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:23,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:23,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:46:23,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:46:23,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1814 [2020-10-14 23:46:23,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:23,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:23,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:46:23,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:23,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:46:23,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:24,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:24,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:24,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:24,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:24,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:24,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:24,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:24,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:24,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:24,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:24,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:24,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:24,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854350707] [2020-10-14 23:46:24,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:24,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:46:24,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16111275] [2020-10-14 23:46:24,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:46:24,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:24,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:46:24,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:46:24,085 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 7 states. [2020-10-14 23:46:24,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:24,144 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-10-14 23:46:24,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:46:24,145 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-14 23:46:24,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:24,146 INFO L225 Difference]: With dead ends: 33 [2020-10-14 23:46:24,147 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 23:46:24,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:46:24,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 23:46:24,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-14 23:46:24,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 23:46:24,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-14 23:46:24,154 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 22 [2020-10-14 23:46:24,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:24,154 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-14 23:46:24,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:46:24,155 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-14 23:46:24,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:46:24,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:24,156 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:24,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:46:24,157 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:24,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:24,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1638162248, now seen corresponding path program 5 times [2020-10-14 23:46:24,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:24,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515001271] [2020-10-14 23:46:24,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:24,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:24,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:24,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:24,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:24,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:24,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:25,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:25,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:28,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:28,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:46:28,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:46:28,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4630 [2020-10-14 23:46:28,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:28,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:28,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:46:28,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:28,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:46:28,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:31,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:31,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:31,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:31,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:31,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:31,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:31,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:31,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:31,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:31,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:31,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:31,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 23:46:31,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515001271] [2020-10-14 23:46:31,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:31,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:46:31,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062274974] [2020-10-14 23:46:31,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:46:31,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:31,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:46:31,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:46:31,042 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 8 states. [2020-10-14 23:46:31,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:31,113 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-10-14 23:46:31,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:46:31,114 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-14 23:46:31,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:31,115 INFO L225 Difference]: With dead ends: 34 [2020-10-14 23:46:31,115 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 23:46:31,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:46:31,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 23:46:31,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-14 23:46:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 23:46:31,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-14 23:46:31,122 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 25 [2020-10-14 23:46:31,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:31,123 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-14 23:46:31,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:46:31,123 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-14 23:46:31,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:46:31,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:31,124 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:31,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:46:31,125 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:31,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:31,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2026102417, now seen corresponding path program 6 times [2020-10-14 23:46:31,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:31,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542074843] [2020-10-14 23:46:31,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:31,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:31,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:31,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:31,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:31,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:31,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:31,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:34,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:36,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:36,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:46:36,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:46:36,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 23:46:36,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:36,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:36,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:46:36,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:36,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:46:36,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:36,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:36,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:36,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:36,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:36,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:36,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:36,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:36,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:36,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:36,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:36,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:36,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:36,294 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:36,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542074843] [2020-10-14 23:46:36,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:36,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:46:36,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393265630] [2020-10-14 23:46:36,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:46:36,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:36,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:46:36,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:46:36,299 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 9 states. [2020-10-14 23:46:36,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:36,411 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-10-14 23:46:36,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:46:36,412 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-14 23:46:36,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:36,414 INFO L225 Difference]: With dead ends: 42 [2020-10-14 23:46:36,414 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 23:46:36,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:46:36,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 23:46:36,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-10-14 23:46:36,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 23:46:36,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2020-10-14 23:46:36,429 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 28 [2020-10-14 23:46:36,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:36,429 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2020-10-14 23:46:36,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:46:36,429 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2020-10-14 23:46:36,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:46:36,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:36,431 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:36,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:46:36,433 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:36,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:36,433 INFO L82 PathProgramCache]: Analyzing trace with hash -517481167, now seen corresponding path program 7 times [2020-10-14 23:46:36,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:36,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587739662] [2020-10-14 23:46:36,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:36,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:36,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:36,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:36,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:36,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:36,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:36,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:36,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:36,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:41,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:41,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:46:41,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 23:46:41,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 23:46:41,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:41,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:41,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:46:41,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:41,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:46:41,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:41,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:41,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:41,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:41,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:41,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:41,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:41,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:46:41,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:41,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:41,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:41,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:41,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:41,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:41,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587739662] [2020-10-14 23:46:41,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:41,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:46:41,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858019580] [2020-10-14 23:46:41,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:46:41,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:41,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:46:41,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:46:41,637 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 11 states. [2020-10-14 23:46:41,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:41,781 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2020-10-14 23:46:41,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:46:41,783 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-14 23:46:41,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:41,784 INFO L225 Difference]: With dead ends: 48 [2020-10-14 23:46:41,784 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 23:46:41,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:46:41,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 23:46:41,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-14 23:46:41,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 23:46:41,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-10-14 23:46:41,798 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 34 [2020-10-14 23:46:41,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:41,799 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-10-14 23:46:41,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:46:41,799 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-10-14 23:46:41,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:46:41,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:41,801 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:41,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:46:41,801 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:41,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:41,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1308990511, now seen corresponding path program 8 times [2020-10-14 23:46:41,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:41,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312688032] [2020-10-14 23:46:41,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:41,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:41,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:41,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:41,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:41,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:41,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:41,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:41,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:41,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:42,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:44,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:46,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:46,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 23:46:46,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 23:46:46,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 23:46:46,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:46,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:46,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:46:46,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:46,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 23:46:46,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:47,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:47,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:47,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:47,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:47,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:47,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:46:47,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:47,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:47,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:47,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:47,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:47,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:47,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312688032] [2020-10-14 23:46:47,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:47,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:46:47,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630225385] [2020-10-14 23:46:47,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:46:47,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:47,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:46:47,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:46:47,028 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 13 states. [2020-10-14 23:46:47,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:47,207 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-10-14 23:46:47,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:46:47,209 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-14 23:46:47,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:47,210 INFO L225 Difference]: With dead ends: 54 [2020-10-14 23:46:47,210 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 23:46:47,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:46:47,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 23:46:47,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-14 23:46:47,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:46:47,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2020-10-14 23:46:47,225 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 40 [2020-10-14 23:46:47,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:47,226 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2020-10-14 23:46:47,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:46:47,226 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2020-10-14 23:46:47,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:46:47,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:47,228 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:47,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:46:47,228 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:47,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:47,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1338674575, now seen corresponding path program 9 times [2020-10-14 23:46:47,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:47,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663849669] [2020-10-14 23:46:47,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:47,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:47,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:47,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:47,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:47,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:47,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:47,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:47,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:47,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:47,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:48,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:52,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:46:52,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 23:46:52,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 23:46:52,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:52,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:52,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:46:52,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-14 23:46:52,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:46:52,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:52,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:52,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:52,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:52,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:52,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:52,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:52,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:52,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:52,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:52,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:52,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-14 23:46:52,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663849669] [2020-10-14 23:46:52,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:46:52,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 23:46:52,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807601271] [2020-10-14 23:46:52,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 23:46:52,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:52,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 23:46:52,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:46:52,286 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand 3 states. [2020-10-14 23:46:52,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:52,311 INFO L93 Difference]: Finished difference Result 99 states and 134 transitions. [2020-10-14 23:46:52,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 23:46:52,311 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-10-14 23:46:52,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:52,312 INFO L225 Difference]: With dead ends: 99 [2020-10-14 23:46:52,312 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 23:46:52,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:46:52,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 23:46:52,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-14 23:46:52,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 23:46:52,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2020-10-14 23:46:52,330 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 46 [2020-10-14 23:46:52,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:52,331 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2020-10-14 23:46:52,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 23:46:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2020-10-14 23:46:52,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 23:46:52,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:52,333 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:52,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:46:52,334 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:52,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:52,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1293605117, now seen corresponding path program 1 times [2020-10-14 23:46:52,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:52,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629458465] [2020-10-14 23:46:52,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:52,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:56,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:57,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:57,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 23:46:57,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 23:46:57,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 23:46:57,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:57,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:57,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:46:57,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-14 23:46:57,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 23:46:57,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:57,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:57,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:57,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:57,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:57,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:57,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:57,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:57,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:57,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:57,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:57,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:57,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:46:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 228 proven. 1 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2020-10-14 23:46:57,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629458465] [2020-10-14 23:46:57,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:57,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 23:46:57,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721096040] [2020-10-14 23:46:57,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:46:57,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:57,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:46:57,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:46:57,412 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 4 states. [2020-10-14 23:46:57,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:57,436 INFO L93 Difference]: Finished difference Result 122 states and 157 transitions. [2020-10-14 23:46:57,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:46:57,437 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-14 23:46:57,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:57,438 INFO L225 Difference]: With dead ends: 122 [2020-10-14 23:46:57,438 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 23:46:57,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:46:57,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 23:46:57,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-14 23:46:57,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-14 23:46:57,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-10-14 23:46:57,450 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 58 [2020-10-14 23:46:57,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:57,450 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-10-14 23:46:57,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:46:57,450 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-10-14 23:46:57,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 23:46:57,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:57,451 INFO L422 BasicCegarLoop]: trace histogram [24, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:57,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:46:57,452 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:57,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:57,452 INFO L82 PathProgramCache]: Analyzing trace with hash 593556721, now seen corresponding path program 2 times [2020-10-14 23:46:57,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:57,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135360120] [2020-10-14 23:46:57,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:57,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:57,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:57,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:57,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:57,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:57,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:57,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:58,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:02,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:02,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 23:47:02,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:47:02,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 23:47:02,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:02,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:02,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:47:02,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-14 23:47:02,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 23:47:02,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:02,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:02,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:02,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:02,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:02,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:02,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:02,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:02,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:02,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:02,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:02,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:02,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 447 proven. 3 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-14 23:47:02,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135360120] [2020-10-14 23:47:02,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:02,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:47:02,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126414237] [2020-10-14 23:47:02,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:47:02,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:02,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:47:02,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:47:02,532 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 5 states. [2020-10-14 23:47:02,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:02,565 INFO L93 Difference]: Finished difference Result 145 states and 180 transitions. [2020-10-14 23:47:02,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:47:02,566 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-14 23:47:02,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:02,567 INFO L225 Difference]: With dead ends: 145 [2020-10-14 23:47:02,567 INFO L226 Difference]: Without dead ends: 83 [2020-10-14 23:47:02,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:47:02,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-14 23:47:02,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-14 23:47:02,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 23:47:02,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-10-14 23:47:02,581 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 70 [2020-10-14 23:47:02,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:02,581 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-10-14 23:47:02,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:47:02,581 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-10-14 23:47:02,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 23:47:02,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:02,582 INFO L422 BasicCegarLoop]: trace histogram [36, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:02,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:47:02,583 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:02,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:02,583 INFO L82 PathProgramCache]: Analyzing trace with hash 150739325, now seen corresponding path program 3 times [2020-10-14 23:47:02,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:02,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935540799] [2020-10-14 23:47:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:02,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:02,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:02,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:02,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:02,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:02,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:02,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:03,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:07,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:07,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 23:47:07,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:47:07,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 23:47:07,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:07,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:07,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:47:07,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:47:07,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 23:47:07,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:07,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:07,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:07,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:07,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:07,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:07,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:07,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:07,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:07,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:07,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:07,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:07,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:07,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 188 proven. 6 refuted. 0 times theorem prover too weak. 1078 trivial. 0 not checked. [2020-10-14 23:47:07,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935540799] [2020-10-14 23:47:07,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:07,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:47:07,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149791679] [2020-10-14 23:47:07,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:47:07,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:07,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:47:07,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:47:07,687 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 6 states. [2020-10-14 23:47:07,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:07,727 INFO L93 Difference]: Finished difference Result 168 states and 203 transitions. [2020-10-14 23:47:07,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:47:07,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-14 23:47:07,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:07,733 INFO L225 Difference]: With dead ends: 168 [2020-10-14 23:47:07,733 INFO L226 Difference]: Without dead ends: 95 [2020-10-14 23:47:07,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:47:07,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-14 23:47:07,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-14 23:47:07,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 23:47:07,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-10-14 23:47:07,764 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 82 [2020-10-14 23:47:07,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:07,765 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-10-14 23:47:07,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:47:07,765 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-10-14 23:47:07,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 23:47:07,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:07,771 INFO L422 BasicCegarLoop]: trace histogram [48, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:07,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:47:07,771 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:07,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:07,772 INFO L82 PathProgramCache]: Analyzing trace with hash -865380495, now seen corresponding path program 4 times [2020-10-14 23:47:07,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:07,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297355457] [2020-10-14 23:47:07,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:07,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:07,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:07,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:07,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:07,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:07,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:07,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:09,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:12,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:12,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 23:47:12,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:47:12,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 23:47:12,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:12,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:12,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:47:12,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 23:47:12,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:47:12,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:12,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:12,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:12,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:12,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:12,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:12,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:12,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:12,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:12,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:12,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:12,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:12,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:12,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:47:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 1103 proven. 10 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2020-10-14 23:47:12,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297355457] [2020-10-14 23:47:12,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:12,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:47:12,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601402785] [2020-10-14 23:47:12,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:47:12,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:12,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:47:12,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:47:12,866 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 7 states. [2020-10-14 23:47:12,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:12,918 INFO L93 Difference]: Finished difference Result 191 states and 226 transitions. [2020-10-14 23:47:12,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:47:12,919 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-10-14 23:47:12,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:12,920 INFO L225 Difference]: With dead ends: 191 [2020-10-14 23:47:12,920 INFO L226 Difference]: Without dead ends: 107 [2020-10-14 23:47:12,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:47:12,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-14 23:47:12,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-14 23:47:12,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 23:47:12,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2020-10-14 23:47:12,963 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 94 [2020-10-14 23:47:12,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:12,964 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2020-10-14 23:47:12,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:47:12,968 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2020-10-14 23:47:12,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-14 23:47:12,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:12,970 INFO L422 BasicCegarLoop]: trace histogram [60, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:12,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:47:12,972 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:12,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:12,972 INFO L82 PathProgramCache]: Analyzing trace with hash 700709373, now seen corresponding path program 5 times [2020-10-14 23:47:12,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:12,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446580880] [2020-10-14 23:47:12,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:12,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:13,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:13,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:13,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:13,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:13,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:13,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:17,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:17,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:17,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-14 23:47:17,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:47:17,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 23:47:17,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:17,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:17,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:47:17,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-14 23:47:17,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:47:17,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:18,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:18,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:18,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:18,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:18,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:18,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:18,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:18,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:18,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:18,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:18,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:18,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:18,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 1554 proven. 15 refuted. 0 times theorem prover too weak. 1131 trivial. 0 not checked. [2020-10-14 23:47:18,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446580880] [2020-10-14 23:47:18,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:18,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:47:18,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796718251] [2020-10-14 23:47:18,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:47:18,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:18,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:47:18,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:47:18,127 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 8 states. [2020-10-14 23:47:18,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:18,195 INFO L93 Difference]: Finished difference Result 214 states and 249 transitions. [2020-10-14 23:47:18,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:47:18,195 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 106 [2020-10-14 23:47:18,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:18,197 INFO L225 Difference]: With dead ends: 214 [2020-10-14 23:47:18,197 INFO L226 Difference]: Without dead ends: 119 [2020-10-14 23:47:18,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:47:18,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-14 23:47:18,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-10-14 23:47:18,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-14 23:47:18,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2020-10-14 23:47:18,217 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 106 [2020-10-14 23:47:18,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:18,217 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2020-10-14 23:47:18,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:47:18,218 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2020-10-14 23:47:18,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-14 23:47:18,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:18,219 INFO L422 BasicCegarLoop]: trace histogram [72, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:18,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:47:18,219 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:18,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:18,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1881446897, now seen corresponding path program 6 times [2020-10-14 23:47:18,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:18,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967208170] [2020-10-14 23:47:18,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:18,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:18,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:18,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:18,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:18,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:18,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:18,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:23,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:23,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-14 23:47:23,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:47:23,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 23:47:23,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:23,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:23,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:47:23,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-14 23:47:23,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:47:23,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:23,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:23,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:23,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:23,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:23,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:23,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:23,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:23,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:23,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:23,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:23,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:23,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3630 backedges. 1778 proven. 21 refuted. 0 times theorem prover too weak. 1831 trivial. 0 not checked. [2020-10-14 23:47:23,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967208170] [2020-10-14 23:47:23,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:23,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:47:23,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458820636] [2020-10-14 23:47:23,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:47:23,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:23,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:47:23,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:47:23,380 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand 9 states. [2020-10-14 23:47:23,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:23,479 INFO L93 Difference]: Finished difference Result 237 states and 272 transitions. [2020-10-14 23:47:23,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:47:23,480 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 118 [2020-10-14 23:47:23,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:23,482 INFO L225 Difference]: With dead ends: 237 [2020-10-14 23:47:23,482 INFO L226 Difference]: Without dead ends: 131 [2020-10-14 23:47:23,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:47:23,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-14 23:47:23,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-10-14 23:47:23,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-14 23:47:23,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 143 transitions. [2020-10-14 23:47:23,505 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 143 transitions. Word has length 118 [2020-10-14 23:47:23,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:23,506 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 143 transitions. [2020-10-14 23:47:23,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:47:23,506 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 143 transitions. [2020-10-14 23:47:23,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-14 23:47:23,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:23,510 INFO L422 BasicCegarLoop]: trace histogram [84, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:23,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:47:23,511 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:23,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:23,511 INFO L82 PathProgramCache]: Analyzing trace with hash 2137160317, now seen corresponding path program 7 times [2020-10-14 23:47:23,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:23,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639582743] [2020-10-14 23:47:23,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:23,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:23,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:23,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:23,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:23,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:23,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:24,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:28,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:28,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-14 23:47:28,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:47:28,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-14 23:47:28,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:28,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:28,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:47:28,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-14 23:47:28,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:47:28,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:28,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:28,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:28,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:28,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:28,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:28,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:28,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:28,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:28,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:28,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:28,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:28,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:28,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:47:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2303 proven. 28 refuted. 0 times theorem prover too weak. 2373 trivial. 0 not checked. [2020-10-14 23:47:28,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639582743] [2020-10-14 23:47:28,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:28,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:47:28,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243386081] [2020-10-14 23:47:28,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:47:28,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:28,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:47:28,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:47:28,699 INFO L87 Difference]: Start difference. First operand 131 states and 143 transitions. Second operand 10 states. [2020-10-14 23:47:28,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:28,793 INFO L93 Difference]: Finished difference Result 260 states and 295 transitions. [2020-10-14 23:47:28,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:47:28,794 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 130 [2020-10-14 23:47:28,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:28,795 INFO L225 Difference]: With dead ends: 260 [2020-10-14 23:47:28,796 INFO L226 Difference]: Without dead ends: 143 [2020-10-14 23:47:28,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:47:28,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-14 23:47:28,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2020-10-14 23:47:28,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-14 23:47:28,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 155 transitions. [2020-10-14 23:47:28,816 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 155 transitions. Word has length 130 [2020-10-14 23:47:28,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:28,816 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 155 transitions. [2020-10-14 23:47:28,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:47:28,816 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 155 transitions. [2020-10-14 23:47:28,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-14 23:47:28,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:28,818 INFO L422 BasicCegarLoop]: trace histogram [96, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:28,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:47:28,818 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:28,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:28,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1834794097, now seen corresponding path program 8 times [2020-10-14 23:47:28,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:28,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436625178] [2020-10-14 23:47:28,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:28,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:28,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:28,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:29,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:29,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:29,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:29,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:33,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:33,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-14 23:47:33,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:47:33,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 23:47:33,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:33,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:33,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:47:33,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 23:47:33,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:47:33,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:33,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:33,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:33,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:33,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:33,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:33,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:33,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:33,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:33,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:33,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:33,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:33,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:47:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 2399 proven. 36 refuted. 0 times theorem prover too weak. 3487 trivial. 0 not checked. [2020-10-14 23:47:34,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436625178] [2020-10-14 23:47:34,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:34,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:47:34,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927075297] [2020-10-14 23:47:34,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:47:34,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:34,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:47:34,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:47:34,016 INFO L87 Difference]: Start difference. First operand 143 states and 155 transitions. Second operand 11 states. [2020-10-14 23:47:34,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:34,107 INFO L93 Difference]: Finished difference Result 283 states and 318 transitions. [2020-10-14 23:47:34,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:47:34,108 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 142 [2020-10-14 23:47:34,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:34,109 INFO L225 Difference]: With dead ends: 283 [2020-10-14 23:47:34,109 INFO L226 Difference]: Without dead ends: 155 [2020-10-14 23:47:34,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:47:34,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-14 23:47:34,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-10-14 23:47:34,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-14 23:47:34,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 167 transitions. [2020-10-14 23:47:34,129 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 167 transitions. Word has length 142 [2020-10-14 23:47:34,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:34,129 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 167 transitions. [2020-10-14 23:47:34,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:47:34,129 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 167 transitions. [2020-10-14 23:47:34,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-14 23:47:34,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:34,131 INFO L422 BasicCegarLoop]: trace histogram [108, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:34,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:47:34,132 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:34,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:34,132 INFO L82 PathProgramCache]: Analyzing trace with hash 533175037, now seen corresponding path program 9 times [2020-10-14 23:47:34,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:34,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134706076] [2020-10-14 23:47:34,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:34,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:34,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:34,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:34,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:34,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:34,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:34,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:34,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:39,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:39,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-14 23:47:39,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:47:39,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-14 23:47:39,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:39,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:39,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:47:39,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:47:39,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:47:39,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:39,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:39,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:39,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:39,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:39,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:39,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:39,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:39,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:39,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:39,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:39,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:39,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7284 backedges. 1112 proven. 45 refuted. 0 times theorem prover too weak. 6127 trivial. 0 not checked. [2020-10-14 23:47:39,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134706076] [2020-10-14 23:47:39,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:39,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:47:39,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698326550] [2020-10-14 23:47:39,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:47:39,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:39,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:47:39,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:47:39,376 INFO L87 Difference]: Start difference. First operand 155 states and 167 transitions. Second operand 12 states. [2020-10-14 23:47:39,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:39,501 INFO L93 Difference]: Finished difference Result 306 states and 341 transitions. [2020-10-14 23:47:39,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:47:39,501 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 154 [2020-10-14 23:47:39,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:39,502 INFO L225 Difference]: With dead ends: 306 [2020-10-14 23:47:39,503 INFO L226 Difference]: Without dead ends: 167 [2020-10-14 23:47:39,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:47:39,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-14 23:47:39,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2020-10-14 23:47:39,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-14 23:47:39,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 179 transitions. [2020-10-14 23:47:39,520 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 179 transitions. Word has length 154 [2020-10-14 23:47:39,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:39,521 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 179 transitions. [2020-10-14 23:47:39,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:47:39,521 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 179 transitions. [2020-10-14 23:47:39,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-14 23:47:39,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:39,523 INFO L422 BasicCegarLoop]: trace histogram [120, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:39,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:47:39,523 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:39,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:39,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1125925135, now seen corresponding path program 10 times [2020-10-14 23:47:39,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:39,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482010200] [2020-10-14 23:47:39,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:39,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:40,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:42,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:42,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-14 23:47:42,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:42,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2522 [2020-10-14 23:47:42,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:42,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:42,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:47:42,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:42,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-14 23:47:42,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:42,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:42,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:42,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:42,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:42,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:42,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:42,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:42,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:42,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:42,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:42,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:42,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8790 backedges. 0 proven. 8130 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-10-14 23:47:42,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482010200] [2020-10-14 23:47:42,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:42,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:47:42,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512961796] [2020-10-14 23:47:42,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:47:42,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:42,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:47:42,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:47:42,436 INFO L87 Difference]: Start difference. First operand 167 states and 179 transitions. Second operand 15 states. [2020-10-14 23:47:42,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:42,699 INFO L93 Difference]: Finished difference Result 210 states and 225 transitions. [2020-10-14 23:47:42,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:47:42,700 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 166 [2020-10-14 23:47:42,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:42,701 INFO L225 Difference]: With dead ends: 210 [2020-10-14 23:47:42,701 INFO L226 Difference]: Without dead ends: 205 [2020-10-14 23:47:42,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:47:42,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-14 23:47:42,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 193. [2020-10-14 23:47:42,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-14 23:47:42,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 207 transitions. [2020-10-14 23:47:42,724 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 207 transitions. Word has length 166 [2020-10-14 23:47:42,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:42,727 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 207 transitions. [2020-10-14 23:47:42,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:47:42,727 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 207 transitions. [2020-10-14 23:47:42,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-14 23:47:42,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:42,729 INFO L422 BasicCegarLoop]: trace histogram [140, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:42,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:47:42,730 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:42,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:42,730 INFO L82 PathProgramCache]: Analyzing trace with hash 627335761, now seen corresponding path program 11 times [2020-10-14 23:47:42,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:42,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663441464] [2020-10-14 23:47:42,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:42,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:43,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:47,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:47,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-14 23:47:47,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:47,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-14 23:47:47,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:47,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:47,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:47:47,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:47,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 184 [2020-10-14 23:47:47,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:48,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:48,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:48,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:48,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:48,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:48,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:47:48,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:48,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:48,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:48,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:48,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:48,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:47:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11977 backedges. 0 proven. 11207 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-10-14 23:47:48,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663441464] [2020-10-14 23:47:48,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:48,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:47:48,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173420249] [2020-10-14 23:47:48,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:47:48,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:48,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:47:48,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:47:48,236 INFO L87 Difference]: Start difference. First operand 193 states and 207 transitions. Second operand 17 states. [2020-10-14 23:47:48,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:48,608 INFO L93 Difference]: Finished difference Result 236 states and 253 transitions. [2020-10-14 23:47:48,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:47:48,610 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 192 [2020-10-14 23:47:48,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:48,612 INFO L225 Difference]: With dead ends: 236 [2020-10-14 23:47:48,613 INFO L226 Difference]: Without dead ends: 231 [2020-10-14 23:47:48,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:47:48,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-14 23:47:48,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 219. [2020-10-14 23:47:48,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-14 23:47:48,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 235 transitions. [2020-10-14 23:47:48,643 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 235 transitions. Word has length 192 [2020-10-14 23:47:48,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:48,644 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 235 transitions. [2020-10-14 23:47:48,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:47:48,644 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 235 transitions. [2020-10-14 23:47:48,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-14 23:47:48,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:48,649 INFO L422 BasicCegarLoop]: trace histogram [160, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:48,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:47:48,649 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:48,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:48,649 INFO L82 PathProgramCache]: Analyzing trace with hash 167087537, now seen corresponding path program 12 times [2020-10-14 23:47:48,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:48,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878209267] [2020-10-14 23:47:48,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:48,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:49,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:53,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:53,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-14 23:47:53,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:53,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-14 23:47:53,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:53,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:53,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:47:53,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:53,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 210 [2020-10-14 23:47:53,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:54,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:54,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:54,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:54,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:54,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:54,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:54,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:54,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:54,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:54,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:54,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:54,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:47:54,435 INFO L134 CoverageAnalysis]: Checked inductivity of 15656 backedges. 0 proven. 14776 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2020-10-14 23:47:54,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878209267] [2020-10-14 23:47:54,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:54,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:47:54,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096494431] [2020-10-14 23:47:54,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:47:54,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:54,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:47:54,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:47:54,441 INFO L87 Difference]: Start difference. First operand 219 states and 235 transitions. Second operand 19 states. [2020-10-14 23:47:54,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:54,940 INFO L93 Difference]: Finished difference Result 262 states and 281 transitions. [2020-10-14 23:47:54,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:47:54,942 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 218 [2020-10-14 23:47:54,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:54,944 INFO L225 Difference]: With dead ends: 262 [2020-10-14 23:47:54,944 INFO L226 Difference]: Without dead ends: 257 [2020-10-14 23:47:54,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:47:54,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-14 23:47:54,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 245. [2020-10-14 23:47:54,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-14 23:47:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 263 transitions. [2020-10-14 23:47:54,982 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 263 transitions. Word has length 218 [2020-10-14 23:47:54,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:54,985 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 263 transitions. [2020-10-14 23:47:54,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:47:54,986 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 263 transitions. [2020-10-14 23:47:54,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-14 23:47:54,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:54,989 INFO L422 BasicCegarLoop]: trace histogram [180, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:54,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:47:54,989 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:54,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:54,990 INFO L82 PathProgramCache]: Analyzing trace with hash -2021834479, now seen corresponding path program 13 times [2020-10-14 23:47:54,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:54,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963320983] [2020-10-14 23:47:54,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:55,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:56,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:00,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:00,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-14 23:48:00,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:00,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-14 23:48:00,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:00,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:00,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:48:00,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:00,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 236 [2020-10-14 23:48:00,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:00,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:00,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:00,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:00,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:00,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:00,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:00,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:48:00,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:00,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:00,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:00,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:00,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:00,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 19827 backedges. 0 proven. 18837 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2020-10-14 23:48:00,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963320983] [2020-10-14 23:48:00,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:00,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:48:00,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78019701] [2020-10-14 23:48:00,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:48:00,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:00,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:48:00,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:48:00,767 INFO L87 Difference]: Start difference. First operand 245 states and 263 transitions. Second operand 21 states. [2020-10-14 23:48:01,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:01,279 INFO L93 Difference]: Finished difference Result 288 states and 309 transitions. [2020-10-14 23:48:01,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:48:01,280 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 244 [2020-10-14 23:48:01,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:01,282 INFO L225 Difference]: With dead ends: 288 [2020-10-14 23:48:01,282 INFO L226 Difference]: Without dead ends: 283 [2020-10-14 23:48:01,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:48:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-14 23:48:01,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 271. [2020-10-14 23:48:01,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-14 23:48:01,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 291 transitions. [2020-10-14 23:48:01,306 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 291 transitions. Word has length 244 [2020-10-14 23:48:01,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:01,306 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 291 transitions. [2020-10-14 23:48:01,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:48:01,306 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 291 transitions. [2020-10-14 23:48:01,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-14 23:48:01,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:01,310 INFO L422 BasicCegarLoop]: trace histogram [200, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:01,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:48:01,310 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:01,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:01,311 INFO L82 PathProgramCache]: Analyzing trace with hash -949912463, now seen corresponding path program 14 times [2020-10-14 23:48:01,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:01,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107868067] [2020-10-14 23:48:01,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:01,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:03,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:06,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:06,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-10-14 23:48:06,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:06,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5094 [2020-10-14 23:48:06,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:06,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:06,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:48:06,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:06,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 262 [2020-10-14 23:48:06,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:07,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:07,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:07,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:07,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:07,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:07,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:48:07,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:07,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:07,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:07,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:07,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:07,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 24490 backedges. 0 proven. 23390 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2020-10-14 23:48:07,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107868067] [2020-10-14 23:48:07,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:07,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:48:07,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857274772] [2020-10-14 23:48:07,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:48:07,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:07,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:48:07,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:48:07,125 INFO L87 Difference]: Start difference. First operand 271 states and 291 transitions. Second operand 23 states. [2020-10-14 23:48:07,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:07,721 INFO L93 Difference]: Finished difference Result 314 states and 337 transitions. [2020-10-14 23:48:07,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:48:07,722 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 270 [2020-10-14 23:48:07,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:07,725 INFO L225 Difference]: With dead ends: 314 [2020-10-14 23:48:07,725 INFO L226 Difference]: Without dead ends: 309 [2020-10-14 23:48:07,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:48:07,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-14 23:48:07,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 297. [2020-10-14 23:48:07,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-14 23:48:07,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 319 transitions. [2020-10-14 23:48:07,767 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 319 transitions. Word has length 270 [2020-10-14 23:48:07,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:07,767 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 319 transitions. [2020-10-14 23:48:07,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:48:07,768 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 319 transitions. [2020-10-14 23:48:07,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-10-14 23:48:07,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:07,775 INFO L422 BasicCegarLoop]: trace histogram [220, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:07,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:48:07,778 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:07,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:07,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1602764753, now seen corresponding path program 15 times [2020-10-14 23:48:07,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:07,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800398632] [2020-10-14 23:48:07,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:08,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:10,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:13,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:13,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 304 [2020-10-14 23:48:13,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:13,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-14 23:48:13,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:13,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:13,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:48:13,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:13,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 288 [2020-10-14 23:48:13,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:13,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:13,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:13,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:13,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:13,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:13,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:48:13,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:13,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:13,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:13,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:13,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:13,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 0 proven. 28435 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2020-10-14 23:48:13,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800398632] [2020-10-14 23:48:13,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:13,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:48:13,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601379671] [2020-10-14 23:48:13,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:48:13,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:13,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:48:13,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:48:13,715 INFO L87 Difference]: Start difference. First operand 297 states and 319 transitions. Second operand 25 states. [2020-10-14 23:48:14,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:14,451 INFO L93 Difference]: Finished difference Result 340 states and 365 transitions. [2020-10-14 23:48:14,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:48:14,451 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 296 [2020-10-14 23:48:14,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:14,454 INFO L225 Difference]: With dead ends: 340 [2020-10-14 23:48:14,454 INFO L226 Difference]: Without dead ends: 335 [2020-10-14 23:48:14,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:48:14,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-14 23:48:14,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 323. [2020-10-14 23:48:14,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-14 23:48:14,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 347 transitions. [2020-10-14 23:48:14,486 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 347 transitions. Word has length 296 [2020-10-14 23:48:14,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:14,488 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 347 transitions. [2020-10-14 23:48:14,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:48:14,489 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 347 transitions. [2020-10-14 23:48:14,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-10-14 23:48:14,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:14,491 INFO L422 BasicCegarLoop]: trace histogram [240, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:14,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 23:48:14,491 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:14,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:14,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1302885583, now seen corresponding path program 16 times [2020-10-14 23:48:14,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:14,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428349459] [2020-10-14 23:48:14,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:14,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:17,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:19,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:19,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 330 [2020-10-14 23:48:19,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:19,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-14 23:48:19,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:19,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:19,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 23:48:19,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:19,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 314 [2020-10-14 23:48:19,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:20,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:20,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:20,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:20,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:20,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:20,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:48:20,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:20,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:20,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:20,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:20,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:20,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 35292 backedges. 0 proven. 33972 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2020-10-14 23:48:20,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428349459] [2020-10-14 23:48:20,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:20,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 23:48:20,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671224685] [2020-10-14 23:48:20,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 23:48:20,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:20,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 23:48:20,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:48:20,454 INFO L87 Difference]: Start difference. First operand 323 states and 347 transitions. Second operand 27 states. [2020-10-14 23:48:21,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:21,316 INFO L93 Difference]: Finished difference Result 366 states and 393 transitions. [2020-10-14 23:48:21,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 23:48:21,318 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 322 [2020-10-14 23:48:21,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:21,322 INFO L225 Difference]: With dead ends: 366 [2020-10-14 23:48:21,322 INFO L226 Difference]: Without dead ends: 361 [2020-10-14 23:48:21,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:48:21,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-10-14 23:48:21,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 349. [2020-10-14 23:48:21,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-14 23:48:21,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 375 transitions. [2020-10-14 23:48:21,354 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 375 transitions. Word has length 322 [2020-10-14 23:48:21,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:21,355 INFO L479 AbstractCegarLoop]: Abstraction has 349 states and 375 transitions. [2020-10-14 23:48:21,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 23:48:21,355 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 375 transitions. [2020-10-14 23:48:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-10-14 23:48:21,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:21,358 INFO L422 BasicCegarLoop]: trace histogram [260, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:21,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 23:48:21,358 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:21,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:21,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1320509073, now seen corresponding path program 17 times [2020-10-14 23:48:21,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:21,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938708209] [2020-10-14 23:48:21,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:21,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:25,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:26,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:26,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 356 [2020-10-14 23:48:26,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:26,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5107 [2020-10-14 23:48:26,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:26,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:26,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 23:48:26,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:26,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 340 [2020-10-14 23:48:26,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:27,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:27,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:27,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:27,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:27,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:27,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:48:27,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:27,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:27,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:27,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:27,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:27,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 41431 backedges. 0 proven. 40001 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2020-10-14 23:48:27,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938708209] [2020-10-14 23:48:27,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:27,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 23:48:27,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273853601] [2020-10-14 23:48:27,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 23:48:27,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:27,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 23:48:27,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:48:27,644 INFO L87 Difference]: Start difference. First operand 349 states and 375 transitions. Second operand 29 states. [2020-10-14 23:48:28,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:28,619 INFO L93 Difference]: Finished difference Result 392 states and 421 transitions. [2020-10-14 23:48:28,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 23:48:28,620 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 348 [2020-10-14 23:48:28,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:28,623 INFO L225 Difference]: With dead ends: 392 [2020-10-14 23:48:28,623 INFO L226 Difference]: Without dead ends: 387 [2020-10-14 23:48:28,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:48:28,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-14 23:48:28,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 375. [2020-10-14 23:48:28,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-10-14 23:48:28,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 403 transitions. [2020-10-14 23:48:28,658 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 403 transitions. Word has length 348 [2020-10-14 23:48:28,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:28,659 INFO L479 AbstractCegarLoop]: Abstraction has 375 states and 403 transitions. [2020-10-14 23:48:28,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 23:48:28,659 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 403 transitions. [2020-10-14 23:48:28,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2020-10-14 23:48:28,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:28,662 INFO L422 BasicCegarLoop]: trace histogram [280, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:28,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 23:48:28,662 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:28,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:28,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1342683633, now seen corresponding path program 18 times [2020-10-14 23:48:28,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:28,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450343619] [2020-10-14 23:48:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:28,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:33,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:33,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:33,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 382 [2020-10-14 23:48:33,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:33,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-14 23:48:33,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:33,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:33,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 23:48:33,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:33,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 366 [2020-10-14 23:48:33,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:34,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:34,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:34,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:34,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:34,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:34,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:48:34,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:34,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:34,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:34,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:34,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:34,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 48062 backedges. 0 proven. 46522 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2020-10-14 23:48:34,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450343619] [2020-10-14 23:48:34,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:34,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 23:48:34,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447422593] [2020-10-14 23:48:34,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 23:48:34,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:34,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 23:48:34,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:48:34,849 INFO L87 Difference]: Start difference. First operand 375 states and 403 transitions. Second operand 31 states. [2020-10-14 23:48:35,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:35,956 INFO L93 Difference]: Finished difference Result 418 states and 449 transitions. [2020-10-14 23:48:35,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 23:48:35,956 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 374 [2020-10-14 23:48:35,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:35,958 INFO L225 Difference]: With dead ends: 418 [2020-10-14 23:48:35,959 INFO L226 Difference]: Without dead ends: 413 [2020-10-14 23:48:35,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:48:35,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-10-14 23:48:35,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 401. [2020-10-14 23:48:35,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-10-14 23:48:35,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 431 transitions. [2020-10-14 23:48:35,995 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 431 transitions. Word has length 374 [2020-10-14 23:48:35,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:35,995 INFO L479 AbstractCegarLoop]: Abstraction has 401 states and 431 transitions. [2020-10-14 23:48:35,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 23:48:35,996 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 431 transitions. [2020-10-14 23:48:35,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2020-10-14 23:48:35,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:35,997 INFO L422 BasicCegarLoop]: trace histogram [300, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:35,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 23:48:35,998 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:35,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:35,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1103848111, now seen corresponding path program 19 times [2020-10-14 23:48:35,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:35,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826227518] [2020-10-14 23:48:35,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:36,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:41,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:41,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 408 [2020-10-14 23:48:41,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:41,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-14 23:48:41,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:41,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:41,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 23:48:41,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:41,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 392 [2020-10-14 23:48:41,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:42,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:42,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:42,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:42,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:42,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:42,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:48:42,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:42,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:42,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:42,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:42,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:42,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 55185 backedges. 0 proven. 53535 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2020-10-14 23:48:42,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826227518] [2020-10-14 23:48:42,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:42,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 23:48:42,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175184571] [2020-10-14 23:48:42,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 23:48:42,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:42,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 23:48:42,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:48:42,346 INFO L87 Difference]: Start difference. First operand 401 states and 431 transitions. Second operand 33 states. [2020-10-14 23:48:43,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:43,620 INFO L93 Difference]: Finished difference Result 444 states and 477 transitions. [2020-10-14 23:48:43,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 23:48:43,620 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 400 [2020-10-14 23:48:43,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:43,623 INFO L225 Difference]: With dead ends: 444 [2020-10-14 23:48:43,623 INFO L226 Difference]: Without dead ends: 439 [2020-10-14 23:48:43,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:48:43,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-10-14 23:48:43,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 427. [2020-10-14 23:48:43,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-10-14 23:48:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 459 transitions. [2020-10-14 23:48:43,665 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 459 transitions. Word has length 400 [2020-10-14 23:48:43,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:43,665 INFO L479 AbstractCegarLoop]: Abstraction has 427 states and 459 transitions. [2020-10-14 23:48:43,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 23:48:43,666 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 459 transitions. [2020-10-14 23:48:43,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2020-10-14 23:48:43,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:43,669 INFO L422 BasicCegarLoop]: trace histogram [320, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:43,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 23:48:43,670 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:43,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:43,670 INFO L82 PathProgramCache]: Analyzing trace with hash -308148047, now seen corresponding path program 20 times [2020-10-14 23:48:43,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:43,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098841507] [2020-10-14 23:48:43,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:44,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:48,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:48,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 434 [2020-10-14 23:48:48,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:48,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-14 23:48:48,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:48,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:48,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 23:48:48,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:48,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 418 [2020-10-14 23:48:48,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:49,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:49,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:49,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:49,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:49,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:49,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:48:49,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:49,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:49,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:49,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:49,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:49,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 62800 backedges. 0 proven. 61040 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2020-10-14 23:48:50,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098841507] [2020-10-14 23:48:50,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:50,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 23:48:50,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253862625] [2020-10-14 23:48:50,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 23:48:50,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:50,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 23:48:50,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:48:50,151 INFO L87 Difference]: Start difference. First operand 427 states and 459 transitions. Second operand 35 states. [2020-10-14 23:48:51,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:51,573 INFO L93 Difference]: Finished difference Result 470 states and 505 transitions. [2020-10-14 23:48:51,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 23:48:51,574 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 426 [2020-10-14 23:48:51,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:51,577 INFO L225 Difference]: With dead ends: 470 [2020-10-14 23:48:51,577 INFO L226 Difference]: Without dead ends: 465 [2020-10-14 23:48:51,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:48:51,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-14 23:48:51,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 453. [2020-10-14 23:48:51,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-10-14 23:48:51,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 487 transitions. [2020-10-14 23:48:51,618 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 487 transitions. Word has length 426 [2020-10-14 23:48:51,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:51,619 INFO L479 AbstractCegarLoop]: Abstraction has 453 states and 487 transitions. [2020-10-14 23:48:51,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 23:48:51,619 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 487 transitions. [2020-10-14 23:48:51,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2020-10-14 23:48:51,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:51,622 INFO L422 BasicCegarLoop]: trace histogram [340, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:51,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 23:48:51,622 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:51,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:51,623 INFO L82 PathProgramCache]: Analyzing trace with hash -550110191, now seen corresponding path program 21 times [2020-10-14 23:48:51,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:51,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887285446] [2020-10-14 23:48:51,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:52,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:56,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:56,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 460 [2020-10-14 23:48:56,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:56,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-14 23:48:56,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:56,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:56,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 23:48:56,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:56,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 444 [2020-10-14 23:48:56,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:58,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:58,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:58,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:58,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:58,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:58,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:48:58,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:58,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:58,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:58,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:58,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:58,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:48:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 70907 backedges. 0 proven. 69037 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2020-10-14 23:48:58,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887285446] [2020-10-14 23:48:58,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:58,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 23:48:58,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313144071] [2020-10-14 23:48:58,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 23:48:58,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:58,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 23:48:58,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 23:48:58,335 INFO L87 Difference]: Start difference. First operand 453 states and 487 transitions. Second operand 37 states. [2020-10-14 23:48:59,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:59,915 INFO L93 Difference]: Finished difference Result 496 states and 533 transitions. [2020-10-14 23:48:59,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 23:48:59,915 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 452 [2020-10-14 23:48:59,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:59,918 INFO L225 Difference]: With dead ends: 496 [2020-10-14 23:48:59,918 INFO L226 Difference]: Without dead ends: 491 [2020-10-14 23:48:59,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 23:48:59,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2020-10-14 23:48:59,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 479. [2020-10-14 23:48:59,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2020-10-14 23:48:59,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 515 transitions. [2020-10-14 23:48:59,960 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 515 transitions. Word has length 452 [2020-10-14 23:48:59,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:59,961 INFO L479 AbstractCegarLoop]: Abstraction has 479 states and 515 transitions. [2020-10-14 23:48:59,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 23:48:59,961 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 515 transitions. [2020-10-14 23:48:59,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-10-14 23:48:59,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:59,964 INFO L422 BasicCegarLoop]: trace histogram [360, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:59,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 23:48:59,965 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:59,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:59,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1604946063, now seen corresponding path program 22 times [2020-10-14 23:48:59,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:59,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565017551] [2020-10-14 23:48:59,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:49:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:00,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:05,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:05,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 486 [2020-10-14 23:49:05,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:05,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5133 [2020-10-14 23:49:05,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:05,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:05,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 23:49:05,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:49:05,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 470 [2020-10-14 23:49:05,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:06,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:49:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:06,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:06,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:06,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:49:06,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:06,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:49:06,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:06,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:06,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:49:06,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:49:06,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:49:06,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 79506 backedges. 0 proven. 77526 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2020-10-14 23:49:06,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565017551] [2020-10-14 23:49:06,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:49:06,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 23:49:06,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072253817] [2020-10-14 23:49:06,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 23:49:06,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:49:06,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 23:49:06,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 23:49:06,845 INFO L87 Difference]: Start difference. First operand 479 states and 515 transitions. Second operand 39 states. [2020-10-14 23:49:08,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:49:08,625 INFO L93 Difference]: Finished difference Result 522 states and 561 transitions. [2020-10-14 23:49:08,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 23:49:08,626 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 478 [2020-10-14 23:49:08,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:49:08,629 INFO L225 Difference]: With dead ends: 522 [2020-10-14 23:49:08,629 INFO L226 Difference]: Without dead ends: 517 [2020-10-14 23:49:08,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 23:49:08,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-10-14 23:49:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 505. [2020-10-14 23:49:08,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-10-14 23:49:08,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 543 transitions. [2020-10-14 23:49:08,679 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 543 transitions. Word has length 478 [2020-10-14 23:49:08,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:49:08,680 INFO L479 AbstractCegarLoop]: Abstraction has 505 states and 543 transitions. [2020-10-14 23:49:08,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 23:49:08,680 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 543 transitions. [2020-10-14 23:49:08,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-10-14 23:49:08,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:49:08,683 INFO L422 BasicCegarLoop]: trace histogram [380, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:49:08,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 23:49:08,684 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:49:08,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:49:08,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1427539247, now seen corresponding path program 23 times [2020-10-14 23:49:08,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:49:08,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874391610] [2020-10-14 23:49:08,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:49:08,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:09,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:10,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:14,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:14,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 512 [2020-10-14 23:49:14,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:49:14,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5172 [2020-10-14 23:49:14,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:14,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:14,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 23:49:14,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:49:14,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 496 [2020-10-14 23:49:14,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:15,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:49:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:15,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:15,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:15,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:49:15,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:15,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:49:15,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:15,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:15,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:49:15,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:49:15,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:49:15,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 88597 backedges. 0 proven. 86507 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2020-10-14 23:49:15,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874391610] [2020-10-14 23:49:15,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:49:15,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 23:49:15,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660364276] [2020-10-14 23:49:15,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 23:49:15,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:49:15,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 23:49:15,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 23:49:15,767 INFO L87 Difference]: Start difference. First operand 505 states and 543 transitions. Second operand 41 states. [2020-10-14 23:49:17,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:49:17,748 INFO L93 Difference]: Finished difference Result 548 states and 589 transitions. [2020-10-14 23:49:17,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 23:49:17,749 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 504 [2020-10-14 23:49:17,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:49:17,753 INFO L225 Difference]: With dead ends: 548 [2020-10-14 23:49:17,753 INFO L226 Difference]: Without dead ends: 543 [2020-10-14 23:49:17,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 23:49:17,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2020-10-14 23:49:17,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 531. [2020-10-14 23:49:17,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531 states. [2020-10-14 23:49:17,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 571 transitions. [2020-10-14 23:49:17,812 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 571 transitions. Word has length 504 [2020-10-14 23:49:17,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:49:17,812 INFO L479 AbstractCegarLoop]: Abstraction has 531 states and 571 transitions. [2020-10-14 23:49:17,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 23:49:17,813 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 571 transitions. [2020-10-14 23:49:17,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2020-10-14 23:49:17,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:49:17,817 INFO L422 BasicCegarLoop]: trace histogram [400, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:49:17,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 23:49:17,818 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:49:17,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:49:17,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1163200049, now seen corresponding path program 24 times [2020-10-14 23:49:17,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:49:17,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267207638] [2020-10-14 23:49:17,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:49:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:18,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:23,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:23,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 538 [2020-10-14 23:49:23,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:23,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-14 23:49:23,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:23,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:23,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 23:49:23,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:49:23,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 522 [2020-10-14 23:49:23,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:24,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:49:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:24,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:24,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:24,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:49:24,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:24,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:49:24,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:24,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:24,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:49:24,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:49:24,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:49:24,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:25,052 INFO L134 CoverageAnalysis]: Checked inductivity of 98180 backedges. 0 proven. 95980 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2020-10-14 23:49:25,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267207638] [2020-10-14 23:49:25,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:49:25,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-14 23:49:25,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014788488] [2020-10-14 23:49:25,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-14 23:49:25,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:49:25,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-14 23:49:25,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:49:25,055 INFO L87 Difference]: Start difference. First operand 531 states and 571 transitions. Second operand 43 states. [2020-10-14 23:49:27,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:49:27,237 INFO L93 Difference]: Finished difference Result 574 states and 617 transitions. [2020-10-14 23:49:27,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 23:49:27,237 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 530 [2020-10-14 23:49:27,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:49:27,240 INFO L225 Difference]: With dead ends: 574 [2020-10-14 23:49:27,240 INFO L226 Difference]: Without dead ends: 569 [2020-10-14 23:49:27,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:49:27,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2020-10-14 23:49:27,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 557. [2020-10-14 23:49:27,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 557 states. [2020-10-14 23:49:27,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 599 transitions. [2020-10-14 23:49:27,298 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 599 transitions. Word has length 530 [2020-10-14 23:49:27,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:49:27,298 INFO L479 AbstractCegarLoop]: Abstraction has 557 states and 599 transitions. [2020-10-14 23:49:27,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-14 23:49:27,299 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 599 transitions. [2020-10-14 23:49:27,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2020-10-14 23:49:27,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:49:27,303 INFO L422 BasicCegarLoop]: trace histogram [420, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:49:27,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 23:49:27,303 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:49:27,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:49:27,304 INFO L82 PathProgramCache]: Analyzing trace with hash -494986863, now seen corresponding path program 25 times [2020-10-14 23:49:27,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:49:27,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467183114] [2020-10-14 23:49:27,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:49:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:27,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:32,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:32,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 564 [2020-10-14 23:49:32,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:32,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5136 [2020-10-14 23:49:32,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:32,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:32,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-14 23:49:32,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:49:32,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 548 [2020-10-14 23:49:32,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:34,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:49:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:34,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:34,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:34,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:49:34,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:34,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:49:34,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:34,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:34,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:49:34,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:49:34,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:49:34,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 108255 backedges. 0 proven. 105945 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2020-10-14 23:49:34,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467183114] [2020-10-14 23:49:34,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:49:34,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-14 23:49:34,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869494446] [2020-10-14 23:49:34,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-14 23:49:34,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:49:34,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-14 23:49:34,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 23:49:34,747 INFO L87 Difference]: Start difference. First operand 557 states and 599 transitions. Second operand 45 states. [2020-10-14 23:49:37,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:49:37,142 INFO L93 Difference]: Finished difference Result 600 states and 645 transitions. [2020-10-14 23:49:37,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 23:49:37,143 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 556 [2020-10-14 23:49:37,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:49:37,145 INFO L225 Difference]: With dead ends: 600 [2020-10-14 23:49:37,145 INFO L226 Difference]: Without dead ends: 595 [2020-10-14 23:49:37,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 23:49:37,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-10-14 23:49:37,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 583. [2020-10-14 23:49:37,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 583 states. [2020-10-14 23:49:37,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 627 transitions. [2020-10-14 23:49:37,196 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 627 transitions. Word has length 556 [2020-10-14 23:49:37,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:49:37,197 INFO L479 AbstractCegarLoop]: Abstraction has 583 states and 627 transitions. [2020-10-14 23:49:37,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-14 23:49:37,197 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 627 transitions. [2020-10-14 23:49:37,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2020-10-14 23:49:37,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:49:37,201 INFO L422 BasicCegarLoop]: trace histogram [440, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:49:37,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 23:49:37,202 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:49:37,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:49:37,202 INFO L82 PathProgramCache]: Analyzing trace with hash -2117225231, now seen corresponding path program 26 times [2020-10-14 23:49:37,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:49:37,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046871864] [2020-10-14 23:49:37,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:49:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:37,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:42,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:42,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 590 [2020-10-14 23:49:42,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:42,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5139 [2020-10-14 23:49:42,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:42,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:42,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-14 23:49:42,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:49:42,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 574 [2020-10-14 23:49:42,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:44,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:49:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:44,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:44,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:44,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:49:44,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:44,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:49:44,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:44,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:44,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:49:44,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:49:44,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:49:44,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 118822 backedges. 0 proven. 116402 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2020-10-14 23:49:44,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046871864] [2020-10-14 23:49:44,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:49:44,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-14 23:49:44,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940963573] [2020-10-14 23:49:44,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-14 23:49:44,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:49:44,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-14 23:49:44,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 23:49:44,877 INFO L87 Difference]: Start difference. First operand 583 states and 627 transitions. Second operand 47 states. [2020-10-14 23:49:47,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:49:47,543 INFO L93 Difference]: Finished difference Result 626 states and 673 transitions. [2020-10-14 23:49:47,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 23:49:47,544 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 582 [2020-10-14 23:49:47,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:49:47,546 INFO L225 Difference]: With dead ends: 626 [2020-10-14 23:49:47,547 INFO L226 Difference]: Without dead ends: 621 [2020-10-14 23:49:47,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 23:49:47,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2020-10-14 23:49:47,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 609. [2020-10-14 23:49:47,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 609 states. [2020-10-14 23:49:47,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 655 transitions. [2020-10-14 23:49:47,603 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 655 transitions. Word has length 582 [2020-10-14 23:49:47,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:49:47,604 INFO L479 AbstractCegarLoop]: Abstraction has 609 states and 655 transitions. [2020-10-14 23:49:47,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-14 23:49:47,604 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 655 transitions. [2020-10-14 23:49:47,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2020-10-14 23:49:47,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:49:47,608 INFO L422 BasicCegarLoop]: trace histogram [460, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:49:47,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 23:49:47,609 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:49:47,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:49:47,609 INFO L82 PathProgramCache]: Analyzing trace with hash 254203985, now seen corresponding path program 27 times [2020-10-14 23:49:47,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:49:47,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699274412] [2020-10-14 23:49:47,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:49:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:48,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:53,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:53,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 616 [2020-10-14 23:49:53,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:53,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5106 [2020-10-14 23:49:53,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:53,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:53,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 23:49:53,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:49:53,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 600 [2020-10-14 23:49:53,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:54,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:49:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:54,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:54,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:54,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:49:54,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:54,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:49:54,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:54,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:54,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:49:54,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:49:54,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:49:54,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 129881 backedges. 0 proven. 127351 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2020-10-14 23:49:55,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699274412] [2020-10-14 23:49:55,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:49:55,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-14 23:49:55,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901759780] [2020-10-14 23:49:55,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-14 23:49:55,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:49:55,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-14 23:49:55,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 23:49:55,387 INFO L87 Difference]: Start difference. First operand 609 states and 655 transitions. Second operand 49 states. [2020-10-14 23:49:58,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:49:58,326 INFO L93 Difference]: Finished difference Result 652 states and 701 transitions. [2020-10-14 23:49:58,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 23:49:58,326 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 608 [2020-10-14 23:49:58,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:49:58,329 INFO L225 Difference]: With dead ends: 652 [2020-10-14 23:49:58,329 INFO L226 Difference]: Without dead ends: 647 [2020-10-14 23:49:58,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 23:49:58,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2020-10-14 23:49:58,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 635. [2020-10-14 23:49:58,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2020-10-14 23:49:58,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 683 transitions. [2020-10-14 23:49:58,399 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 683 transitions. Word has length 608 [2020-10-14 23:49:58,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:49:58,399 INFO L479 AbstractCegarLoop]: Abstraction has 635 states and 683 transitions. [2020-10-14 23:49:58,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-14 23:49:58,400 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 683 transitions. [2020-10-14 23:49:58,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2020-10-14 23:49:58,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:49:58,405 INFO L422 BasicCegarLoop]: trace histogram [480, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:49:58,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 23:49:58,405 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:49:58,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:49:58,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1024425039, now seen corresponding path program 28 times [2020-10-14 23:49:58,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:49:58,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889244583] [2020-10-14 23:49:58,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:49:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:59,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:50:03,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:50:03,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 642 [2020-10-14 23:50:03,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:50:03,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5230 [2020-10-14 23:50:03,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:50:03,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:50:03,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-14 23:50:03,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:50:03,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 626 [2020-10-14 23:50:03,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:50:05,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:50:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:50:05,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:50:05,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:50:05,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:50:05,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:50:05,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:50:05,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:50:05,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:50:05,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:50:05,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:50:05,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:50:05,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:50:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 141432 backedges. 0 proven. 138792 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2020-10-14 23:50:06,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889244583] [2020-10-14 23:50:06,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:50:06,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-14 23:50:06,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514752982] [2020-10-14 23:50:06,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-14 23:50:06,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:50:06,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-14 23:50:06,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 23:50:06,463 INFO L87 Difference]: Start difference. First operand 635 states and 683 transitions. Second operand 51 states. [2020-10-14 23:50:09,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:50:09,634 INFO L93 Difference]: Finished difference Result 678 states and 729 transitions. [2020-10-14 23:50:09,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-14 23:50:09,635 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 634 [2020-10-14 23:50:09,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:50:09,638 INFO L225 Difference]: With dead ends: 678 [2020-10-14 23:50:09,638 INFO L226 Difference]: Without dead ends: 673 [2020-10-14 23:50:09,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 23:50:09,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2020-10-14 23:50:09,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 661. [2020-10-14 23:50:09,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 661 states. [2020-10-14 23:50:09,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 711 transitions. [2020-10-14 23:50:09,714 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 711 transitions. Word has length 634 [2020-10-14 23:50:09,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:50:09,723 INFO L479 AbstractCegarLoop]: Abstraction has 661 states and 711 transitions. [2020-10-14 23:50:09,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-14 23:50:09,724 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 711 transitions. [2020-10-14 23:50:09,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 661 [2020-10-14 23:50:09,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:50:09,731 INFO L422 BasicCegarLoop]: trace histogram [500, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:50:09,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 23:50:09,732 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:50:09,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:50:09,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2112833775, now seen corresponding path program 29 times [2020-10-14 23:50:09,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:50:09,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657486930] [2020-10-14 23:50:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:50:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:50:10,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking...