/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_m4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:38:11,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:38:11,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:38:11,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:38:11,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:38:11,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:38:11,322 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:38:11,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:38:11,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:38:11,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:38:11,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:38:11,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:38:11,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:38:11,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:38:11,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:38:11,342 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:38:11,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:38:11,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:38:11,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:38:11,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:38:11,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:38:11,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:38:11,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:38:11,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:38:11,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:38:11,373 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:38:11,373 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:38:11,377 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:38:11,377 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:38:11,382 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:38:11,382 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:38:11,383 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:38:11,384 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:38:11,385 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:38:11,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:38:11,388 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:38:11,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:38:11,389 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:38:11,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:38:11,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:38:11,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:38:11,394 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 04:38:11,432 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:38:11,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:38:11,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:38:11,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:38:11,435 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:38:11,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:38:11,436 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:38:11,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:38:11,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:38:11,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:38:11,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:38:11,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:38:11,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:38:11,438 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:38:11,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:38:11,440 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:38:11,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:38:11,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:38:11,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:38:11,441 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:38:11,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:38:11,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:38:11,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:38:11,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:38:11,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:38:11,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:38:11,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:38:11,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:38:11,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:38:11,443 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 04:38:11,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:38:11,752 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:38:11,757 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:38:11,758 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:38:11,759 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:38:11,759 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m4.c [2020-10-13 04:38:11,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a65fc755c/ea866fbb6ad04b18887ac7b928374be1/FLAGc3dc2b62a [2020-10-13 04:38:12,344 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:38:12,344 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_m4.c [2020-10-13 04:38:12,352 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a65fc755c/ea866fbb6ad04b18887ac7b928374be1/FLAGc3dc2b62a [2020-10-13 04:38:12,700 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a65fc755c/ea866fbb6ad04b18887ac7b928374be1 [2020-10-13 04:38:12,708 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:38:12,710 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:38:12,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:38:12,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:38:12,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:38:12,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:38:12" (1/1) ... [2020-10-13 04:38:12,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32e3ee29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:12, skipping insertion in model container [2020-10-13 04:38:12,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:38:12" (1/1) ... [2020-10-13 04:38:12,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:38:12,746 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:38:12,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:38:12,912 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:38:12,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:38:13,046 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:38:13,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:13 WrapperNode [2020-10-13 04:38:13,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:38:13,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:38:13,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:38:13,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:38:13,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:13" (1/1) ... [2020-10-13 04:38:13,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:13" (1/1) ... [2020-10-13 04:38:13,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:13" (1/1) ... [2020-10-13 04:38:13,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:13" (1/1) ... [2020-10-13 04:38:13,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:13" (1/1) ... [2020-10-13 04:38:13,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:13" (1/1) ... [2020-10-13 04:38:13,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:13" (1/1) ... [2020-10-13 04:38:13,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:38:13,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:38:13,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:38:13,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:38:13,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:38:13,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:38:13,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:38:13,186 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 04:38:13,187 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:38:13,187 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:38:13,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:38:13,187 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 04:38:13,188 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 04:38:13,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:38:13,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-13 04:38:13,189 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:38:13,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:38:13,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:38:13,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:38:13,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:38:13,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:38:13,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:38:13,553 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:38:13,553 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-13 04:38:13,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:38:13 BoogieIcfgContainer [2020-10-13 04:38:13,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:38:13,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:38:13,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:38:13,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:38:13,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:38:12" (1/3) ... [2020-10-13 04:38:13,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4369a8c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:38:13, skipping insertion in model container [2020-10-13 04:38:13,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:13" (2/3) ... [2020-10-13 04:38:13,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4369a8c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:38:13, skipping insertion in model container [2020-10-13 04:38:13,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:38:13" (3/3) ... [2020-10-13 04:38:13,575 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_m4.c [2020-10-13 04:38:13,586 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:38:13,593 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:38:13,617 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:38:13,646 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:38:13,646 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:38:13,646 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:38:13,646 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:38:13,646 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:38:13,647 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:38:13,647 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:38:13,647 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:38:13,664 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-10-13 04:38:13,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 04:38:13,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:13,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:13,673 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:13,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:13,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1372119815, now seen corresponding path program 1 times [2020-10-13 04:38:13,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:13,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887610] [2020-10-13 04:38:13,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:13,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:13,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:13,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:13,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:13,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:14,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:14,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:14,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:14,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:16,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:17,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 04:38:17,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 04:38:17,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3704 [2020-10-13 04:38:17,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:17,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:17,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 04:38:17,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:17,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:38:17,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:17,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:17,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:17,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:17,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:38:17,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:17,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:17,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:17,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:17,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:17,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887610] [2020-10-13 04:38:17,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:38:17,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:38:17,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192055660] [2020-10-13 04:38:17,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:38:17,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:17,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:38:17,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:38:17,605 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 3 states. [2020-10-13 04:38:17,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:17,754 INFO L93 Difference]: Finished difference Result 83 states and 119 transitions. [2020-10-13 04:38:17,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:38:17,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-10-13 04:38:17,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:17,767 INFO L225 Difference]: With dead ends: 83 [2020-10-13 04:38:17,767 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 04:38:17,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:38:17,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 04:38:17,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-13 04:38:17,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 04:38:17,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-10-13 04:38:17,818 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 28 [2020-10-13 04:38:17,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:17,818 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-10-13 04:38:17,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:38:17,819 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-10-13 04:38:17,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 04:38:17,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:17,820 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:17,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:38:17,821 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:17,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:17,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1010830987, now seen corresponding path program 1 times [2020-10-13 04:38:17,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:17,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208452375] [2020-10-13 04:38:17,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:17,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:19,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:22,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:22,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 04:38:22,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 04:38:22,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 04:38:22,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:22,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:38:22,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:22,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:38:22,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:22,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:22,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:22,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:22,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:22,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:22,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:22,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:22,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:22,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:22,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:22,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:22,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208452375] [2020-10-13 04:38:22,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:38:22,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:38:22,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325390948] [2020-10-13 04:38:22,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:38:22,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:22,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:38:22,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:38:22,936 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 4 states. [2020-10-13 04:38:23,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:23,089 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2020-10-13 04:38:23,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:38:23,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-13 04:38:23,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:23,091 INFO L225 Difference]: With dead ends: 69 [2020-10-13 04:38:23,092 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 04:38:23,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:38:23,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 04:38:23,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-13 04:38:23,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 04:38:23,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-13 04:38:23,114 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 28 [2020-10-13 04:38:23,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:23,114 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-13 04:38:23,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:38:23,115 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-13 04:38:23,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 04:38:23,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:23,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:23,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:38:23,117 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:23,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:23,118 INFO L82 PathProgramCache]: Analyzing trace with hash 195310771, now seen corresponding path program 1 times [2020-10-13 04:38:23,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:23,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438608493] [2020-10-13 04:38:23,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:23,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:28,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:28,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 04:38:28,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 04:38:28,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:38:28,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:28,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:38:28,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:28,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:38:28,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:28,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:28,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:28,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:28,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:28,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:28,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:28,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:28,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:28,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:28,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:28,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:28,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438608493] [2020-10-13 04:38:28,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:28,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:38:28,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138270031] [2020-10-13 04:38:28,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:38:28,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:28,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:38:28,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:38:28,204 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 5 states. [2020-10-13 04:38:28,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:28,379 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2020-10-13 04:38:28,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:38:28,380 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-13 04:38:28,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:28,381 INFO L225 Difference]: With dead ends: 70 [2020-10-13 04:38:28,381 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 04:38:28,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:38:28,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 04:38:28,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-13 04:38:28,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 04:38:28,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-10-13 04:38:28,390 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 30 [2020-10-13 04:38:28,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:28,390 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-10-13 04:38:28,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:38:28,390 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-10-13 04:38:28,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 04:38:28,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:28,392 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:28,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:38:28,393 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:28,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:28,393 INFO L82 PathProgramCache]: Analyzing trace with hash -343629711, now seen corresponding path program 2 times [2020-10-13 04:38:28,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:28,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515591028] [2020-10-13 04:38:28,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:28,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:28,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:28,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:28,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:28,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:28,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:28,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:28,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:29,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:33,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:33,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 04:38:33,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 04:38:33,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 04:38:33,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:33,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:38:33,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:33,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:38:33,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 04:38:33,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:33,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:33,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:33,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:33,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:33,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:33,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:33,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:33,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:33,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:33,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:38:33,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515591028] [2020-10-13 04:38:33,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:38:33,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 04:38:33,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137999766] [2020-10-13 04:38:33,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:38:33,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:33,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:38:33,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:38:33,475 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 5 states. [2020-10-13 04:38:33,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:33,690 INFO L93 Difference]: Finished difference Result 83 states and 105 transitions. [2020-10-13 04:38:33,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:38:33,690 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-10-13 04:38:33,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:33,692 INFO L225 Difference]: With dead ends: 83 [2020-10-13 04:38:33,692 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 04:38:33,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:38:33,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 04:38:33,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2020-10-13 04:38:33,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 04:38:33,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-10-13 04:38:33,708 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 32 [2020-10-13 04:38:33,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:33,709 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-10-13 04:38:33,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:38:33,710 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-10-13 04:38:33,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 04:38:33,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:33,713 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:33,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:38:33,713 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:33,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:33,714 INFO L82 PathProgramCache]: Analyzing trace with hash -310745247, now seen corresponding path program 1 times [2020-10-13 04:38:33,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:33,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095550634] [2020-10-13 04:38:33,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:33,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:33,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:33,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:33,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:33,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:33,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:35,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:38,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:38,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 04:38:38,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:38:38,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:38:38,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:38,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:38:38,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:38,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:38:38,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:38,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:38,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:38,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:38,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:38,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:38,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:38,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:38,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:38,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:38,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:38,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:38,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 04:38:38,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095550634] [2020-10-13 04:38:38,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:38,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:38:38,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782742895] [2020-10-13 04:38:38,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:38:38,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:38,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:38:38,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:38:38,797 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 6 states. [2020-10-13 04:38:39,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:39,025 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2020-10-13 04:38:39,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:38:39,025 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-10-13 04:38:39,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:39,026 INFO L225 Difference]: With dead ends: 98 [2020-10-13 04:38:39,027 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 04:38:39,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:38:39,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 04:38:39,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-13 04:38:39,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 04:38:39,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2020-10-13 04:38:39,036 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 48 [2020-10-13 04:38:39,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:39,036 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2020-10-13 04:38:39,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:38:39,036 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2020-10-13 04:38:39,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 04:38:39,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:39,038 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:39,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:38:39,038 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:39,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:39,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1171459665, now seen corresponding path program 2 times [2020-10-13 04:38:39,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:39,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833744489] [2020-10-13 04:38:39,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:39,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:39,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:40,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:41,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:41,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:43,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:44,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:44,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 04:38:44,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:38:44,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5139 [2020-10-13 04:38:44,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:44,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 04:38:44,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:44,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 04:38:44,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:47,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:47,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:47,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:47,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:47,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:47,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:47,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:47,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:47,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:47,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:47,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:47,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833744489] [2020-10-13 04:38:47,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:47,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 04:38:47,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096953496] [2020-10-13 04:38:47,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 04:38:47,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:47,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 04:38:47,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1573, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:38:47,164 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 42 states. [2020-10-13 04:38:52,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:52,029 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2020-10-13 04:38:52,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-13 04:38:52,030 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 64 [2020-10-13 04:38:52,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:52,034 INFO L225 Difference]: With dead ends: 145 [2020-10-13 04:38:52,035 INFO L226 Difference]: Without dead ends: 140 [2020-10-13 04:38:52,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=372, Invalid=4884, Unknown=0, NotChecked=0, Total=5256 [2020-10-13 04:38:52,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-13 04:38:52,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 112. [2020-10-13 04:38:52,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 04:38:52,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 128 transitions. [2020-10-13 04:38:52,055 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 128 transitions. Word has length 64 [2020-10-13 04:38:52,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:52,055 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 128 transitions. [2020-10-13 04:38:52,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 04:38:52,056 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 128 transitions. [2020-10-13 04:38:52,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 04:38:52,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:52,057 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:52,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:38:52,058 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:52,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:52,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1270458767, now seen corresponding path program 3 times [2020-10-13 04:38:52,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:52,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959212284] [2020-10-13 04:38:52,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:52,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:52,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:52,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:52,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:52,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:52,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:57,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:57,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 04:38:57,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:38:57,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:38:57,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:57,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:38:57,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 04:38:57,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:38:57,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:57,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:57,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:57,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:57,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:57,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:57,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:57,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:57,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:57,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:57,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:57,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 04:38:57,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959212284] [2020-10-13 04:38:57,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:57,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:38:57,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623392734] [2020-10-13 04:38:57,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:38:57,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:57,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:38:57,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:38:57,177 INFO L87 Difference]: Start difference. First operand 112 states and 128 transitions. Second operand 10 states. [2020-10-13 04:38:57,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:57,666 INFO L93 Difference]: Finished difference Result 229 states and 265 transitions. [2020-10-13 04:38:57,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:38:57,667 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-13 04:38:57,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:57,668 INFO L225 Difference]: With dead ends: 229 [2020-10-13 04:38:57,669 INFO L226 Difference]: Without dead ends: 144 [2020-10-13 04:38:57,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:38:57,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-13 04:38:57,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 129. [2020-10-13 04:38:57,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-13 04:38:57,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 145 transitions. [2020-10-13 04:38:57,689 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 145 transitions. Word has length 66 [2020-10-13 04:38:57,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:57,690 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 145 transitions. [2020-10-13 04:38:57,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:38:57,690 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 145 transitions. [2020-10-13 04:38:57,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 04:38:57,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:57,692 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:57,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:38:57,692 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:57,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:57,693 INFO L82 PathProgramCache]: Analyzing trace with hash -828540337, now seen corresponding path program 4 times [2020-10-13 04:38:57,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:57,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393438525] [2020-10-13 04:38:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:57,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:57,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:57,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:57,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:57,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:57,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:58,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:02,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:02,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 04:39:02,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:39:02,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:39:02,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:02,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:39:02,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:39:02,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:39:02,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:02,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:02,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:02,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:02,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:02,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:02,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:02,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:02,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:02,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:02,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:02,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 04:39:02,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393438525] [2020-10-13 04:39:02,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:02,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:39:02,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53186116] [2020-10-13 04:39:02,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:39:02,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:02,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:39:02,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:39:02,793 INFO L87 Difference]: Start difference. First operand 129 states and 145 transitions. Second operand 10 states. [2020-10-13 04:39:03,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:03,072 INFO L93 Difference]: Finished difference Result 227 states and 256 transitions. [2020-10-13 04:39:03,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:39:03,073 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-13 04:39:03,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:03,074 INFO L225 Difference]: With dead ends: 227 [2020-10-13 04:39:03,074 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 04:39:03,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:39:03,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 04:39:03,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-13 04:39:03,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 04:39:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 138 transitions. [2020-10-13 04:39:03,093 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 138 transitions. Word has length 66 [2020-10-13 04:39:03,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:03,093 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 138 transitions. [2020-10-13 04:39:03,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:39:03,094 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 138 transitions. [2020-10-13 04:39:03,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 04:39:03,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:03,095 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:03,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:39:03,096 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:03,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:03,096 INFO L82 PathProgramCache]: Analyzing trace with hash 448203407, now seen corresponding path program 5 times [2020-10-13 04:39:03,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:03,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160402512] [2020-10-13 04:39:03,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:03,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:03,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:03,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:03,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:03,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:03,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:08,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:08,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 04:39:08,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:39:08,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:39:08,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:08,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:39:08,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:39:08,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:39:08,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:08,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:08,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:08,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:08,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:08,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:08,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:08,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:08,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:08,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:08,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:08,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 04:39:08,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160402512] [2020-10-13 04:39:08,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:08,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:39:08,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62281800] [2020-10-13 04:39:08,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:39:08,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:08,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:39:08,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:39:08,195 INFO L87 Difference]: Start difference. First operand 123 states and 138 transitions. Second operand 10 states. [2020-10-13 04:39:08,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:08,619 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2020-10-13 04:39:08,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:39:08,620 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-13 04:39:08,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:08,621 INFO L225 Difference]: With dead ends: 130 [2020-10-13 04:39:08,621 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 04:39:08,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:39:08,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 04:39:08,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-13 04:39:08,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 04:39:08,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2020-10-13 04:39:08,644 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 66 [2020-10-13 04:39:08,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:08,645 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2020-10-13 04:39:08,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:39:08,645 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2020-10-13 04:39:08,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 04:39:08,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:08,648 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:08,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:39:08,649 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:08,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:08,649 INFO L82 PathProgramCache]: Analyzing trace with hash 815682943, now seen corresponding path program 6 times [2020-10-13 04:39:08,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:08,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852750709] [2020-10-13 04:39:08,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:08,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:09,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:11,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:12,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:13,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:13,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 04:39:13,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:39:13,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:39:13,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:13,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-13 04:39:13,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:39:13,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 04:39:13,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:17,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:17,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:17,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:17,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:17,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:17,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:17,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:17,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:17,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:17,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:17,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 04:39:17,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852750709] [2020-10-13 04:39:17,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:17,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-13 04:39:17,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123536243] [2020-10-13 04:39:17,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-13 04:39:17,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:17,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-13 04:39:17,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2248, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 04:39:17,883 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 49 states. [2020-10-13 04:39:21,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:21,157 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2020-10-13 04:39:21,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 04:39:21,158 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 82 [2020-10-13 04:39:21,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:21,159 INFO L225 Difference]: With dead ends: 146 [2020-10-13 04:39:21,159 INFO L226 Difference]: Without dead ends: 141 [2020-10-13 04:39:21,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=114, Invalid=2436, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 04:39:21,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-13 04:39:21,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 136. [2020-10-13 04:39:21,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 04:39:21,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 151 transitions. [2020-10-13 04:39:21,197 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 151 transitions. Word has length 82 [2020-10-13 04:39:21,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:21,198 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 151 transitions. [2020-10-13 04:39:21,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-13 04:39:21,198 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 151 transitions. [2020-10-13 04:39:21,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 04:39:21,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:21,201 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:21,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:39:21,202 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:21,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:21,202 INFO L82 PathProgramCache]: Analyzing trace with hash -868139715, now seen corresponding path program 7 times [2020-10-13 04:39:21,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:21,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154348688] [2020-10-13 04:39:21,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:21,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:21,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:21,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:21,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:21,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:22,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:26,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:26,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 04:39:26,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:39:26,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:39:26,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:26,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:39:26,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 04:39:26,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:39:26,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:26,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:26,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:26,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:26,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:26,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:26,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:26,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:26,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:26,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:26,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:26,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:26,332 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-13 04:39:26,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154348688] [2020-10-13 04:39:26,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:26,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:39:26,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648065811] [2020-10-13 04:39:26,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:39:26,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:26,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:39:26,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:39:26,336 INFO L87 Difference]: Start difference. First operand 136 states and 151 transitions. Second operand 12 states. [2020-10-13 04:39:27,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:27,170 INFO L93 Difference]: Finished difference Result 271 states and 304 transitions. [2020-10-13 04:39:27,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:39:27,171 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 84 [2020-10-13 04:39:27,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:27,173 INFO L225 Difference]: With dead ends: 271 [2020-10-13 04:39:27,173 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 04:39:27,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:39:27,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 04:39:27,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 145. [2020-10-13 04:39:27,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-13 04:39:27,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 159 transitions. [2020-10-13 04:39:27,200 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 159 transitions. Word has length 84 [2020-10-13 04:39:27,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:27,200 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 159 transitions. [2020-10-13 04:39:27,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:39:27,200 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 159 transitions. [2020-10-13 04:39:27,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 04:39:27,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:27,209 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:27,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:39:27,209 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:27,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:27,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1999770115, now seen corresponding path program 8 times [2020-10-13 04:39:27,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:27,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192798440] [2020-10-13 04:39:27,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:27,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:27,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:27,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:27,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:27,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:29,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:32,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:32,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 04:39:32,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:39:32,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:39:32,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:32,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:39:32,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:39:32,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:39:32,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:32,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:32,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:32,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:32,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:32,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:32,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:32,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:32,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:32,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:32,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:32,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:32,346 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-13 04:39:32,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192798440] [2020-10-13 04:39:32,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:32,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:39:32,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826082903] [2020-10-13 04:39:32,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:39:32,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:32,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:39:32,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:39:32,350 INFO L87 Difference]: Start difference. First operand 145 states and 159 transitions. Second operand 12 states. [2020-10-13 04:39:32,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:32,664 INFO L93 Difference]: Finished difference Result 279 states and 307 transitions. [2020-10-13 04:39:32,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:39:32,666 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 84 [2020-10-13 04:39:32,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:32,668 INFO L225 Difference]: With dead ends: 279 [2020-10-13 04:39:32,668 INFO L226 Difference]: Without dead ends: 148 [2020-10-13 04:39:32,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:39:32,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-13 04:39:32,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-10-13 04:39:32,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 04:39:32,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 161 transitions. [2020-10-13 04:39:32,690 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 161 transitions. Word has length 84 [2020-10-13 04:39:32,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:32,690 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 161 transitions. [2020-10-13 04:39:32,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:39:32,690 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 161 transitions. [2020-10-13 04:39:32,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 04:39:32,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:32,692 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:32,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:39:32,693 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:32,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:32,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1394122949, now seen corresponding path program 9 times [2020-10-13 04:39:32,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:32,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357993540] [2020-10-13 04:39:32,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:32,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:32,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:32,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:32,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:32,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:36,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:36,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:37,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:37,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 04:39:37,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:39:37,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:39:37,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:37,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:39:37,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 04:39:37,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:39:37,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:37,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:37,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:37,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:37,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:37,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:37,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:39:37,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:37,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:37,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:37,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:37,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 04:39:37,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357993540] [2020-10-13 04:39:37,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:37,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:39:37,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255318668] [2020-10-13 04:39:37,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:39:37,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:37,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:39:37,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:39:37,819 INFO L87 Difference]: Start difference. First operand 147 states and 161 transitions. Second operand 12 states. [2020-10-13 04:39:38,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:38,436 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2020-10-13 04:39:38,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:39:38,437 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2020-10-13 04:39:38,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:38,438 INFO L225 Difference]: With dead ends: 154 [2020-10-13 04:39:38,438 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 04:39:38,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:39:38,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 04:39:38,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-13 04:39:38,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 04:39:38,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2020-10-13 04:39:38,452 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 86 [2020-10-13 04:39:38,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:38,453 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2020-10-13 04:39:38,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:39:38,454 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2020-10-13 04:39:38,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 04:39:38,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:38,455 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:38,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:39:38,455 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:38,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:38,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1253839571, now seen corresponding path program 10 times [2020-10-13 04:39:38,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:38,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660513520] [2020-10-13 04:39:38,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:38,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:39,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:42,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:43,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:43,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 04:39:43,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:39:43,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:39:43,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:43,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-13 04:39:43,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:39:43,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-13 04:39:43,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:53,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:53,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:53,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:53,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:53,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:53,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:53,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:53,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:53,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:53,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:53,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 2 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:54,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660513520] [2020-10-13 04:39:54,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:54,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-13 04:39:54,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491385123] [2020-10-13 04:39:54,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-13 04:39:54,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:54,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-13 04:39:54,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=5207, Unknown=0, NotChecked=0, Total=5402 [2020-10-13 04:39:54,007 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand 74 states. [2020-10-13 04:39:54,433 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 3 [2020-10-13 04:39:54,994 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 15 [2020-10-13 04:40:03,150 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-13 04:40:07,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:07,505 INFO L93 Difference]: Finished difference Result 198 states and 216 transitions. [2020-10-13 04:40:07,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-10-13 04:40:07,506 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 100 [2020-10-13 04:40:07,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:07,508 INFO L225 Difference]: With dead ends: 198 [2020-10-13 04:40:07,509 INFO L226 Difference]: Without dead ends: 182 [2020-10-13 04:40:07,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=479, Invalid=10651, Unknown=0, NotChecked=0, Total=11130 [2020-10-13 04:40:07,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-13 04:40:07,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 166. [2020-10-13 04:40:07,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-13 04:40:07,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 181 transitions. [2020-10-13 04:40:07,525 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 181 transitions. Word has length 100 [2020-10-13 04:40:07,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:07,525 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 181 transitions. [2020-10-13 04:40:07,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-13 04:40:07,525 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 181 transitions. [2020-10-13 04:40:07,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 04:40:07,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:07,527 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:07,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:40:07,527 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:07,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:07,527 INFO L82 PathProgramCache]: Analyzing trace with hash -288816789, now seen corresponding path program 11 times [2020-10-13 04:40:07,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:07,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700947162] [2020-10-13 04:40:07,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:07,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:07,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:07,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:07,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:07,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:12,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:12,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 04:40:12,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:40:12,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:40:12,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:12,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:40:12,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 04:40:12,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:40:12,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:12,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:12,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:12,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:12,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:12,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:12,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:40:12,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:12,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:12,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:12,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:12,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:40:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-13 04:40:12,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700947162] [2020-10-13 04:40:12,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:12,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:40:12,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235445984] [2020-10-13 04:40:12,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:40:12,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:12,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:40:12,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:40:12,816 INFO L87 Difference]: Start difference. First operand 166 states and 181 transitions. Second operand 14 states. [2020-10-13 04:40:13,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:13,949 INFO L93 Difference]: Finished difference Result 339 states and 374 transitions. [2020-10-13 04:40:13,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:40:13,950 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 102 [2020-10-13 04:40:13,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:13,952 INFO L225 Difference]: With dead ends: 339 [2020-10-13 04:40:13,952 INFO L226 Difference]: Without dead ends: 212 [2020-10-13 04:40:13,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:40:13,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-13 04:40:13,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 197. [2020-10-13 04:40:13,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-13 04:40:13,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 213 transitions. [2020-10-13 04:40:13,972 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 213 transitions. Word has length 102 [2020-10-13 04:40:13,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:13,972 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 213 transitions. [2020-10-13 04:40:13,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:40:13,972 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 213 transitions. [2020-10-13 04:40:13,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 04:40:13,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:13,974 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:13,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:40:13,974 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:13,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:13,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1816751573, now seen corresponding path program 12 times [2020-10-13 04:40:13,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:13,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808637170] [2020-10-13 04:40:13,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:13,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:14,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:14,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:14,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:14,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:18,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:18,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 04:40:18,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:40:18,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:40:18,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:18,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:40:18,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:40:18,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:40:18,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:19,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:19,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:19,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:19,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:19,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:19,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:19,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:19,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:19,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:19,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:19,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-13 04:40:19,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808637170] [2020-10-13 04:40:19,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:19,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:40:19,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119569666] [2020-10-13 04:40:19,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:40:19,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:19,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:40:19,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:40:19,129 INFO L87 Difference]: Start difference. First operand 197 states and 213 transitions. Second operand 14 states. [2020-10-13 04:40:19,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:19,535 INFO L93 Difference]: Finished difference Result 347 states and 376 transitions. [2020-10-13 04:40:19,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:40:19,536 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 102 [2020-10-13 04:40:19,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:19,537 INFO L225 Difference]: With dead ends: 347 [2020-10-13 04:40:19,537 INFO L226 Difference]: Without dead ends: 188 [2020-10-13 04:40:19,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:40:19,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-13 04:40:19,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2020-10-13 04:40:19,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-13 04:40:19,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 202 transitions. [2020-10-13 04:40:19,554 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 202 transitions. Word has length 102 [2020-10-13 04:40:19,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:19,554 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 202 transitions. [2020-10-13 04:40:19,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:40:19,555 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 202 transitions. [2020-10-13 04:40:19,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 04:40:19,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:19,556 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:19,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:40:19,557 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:19,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:19,557 INFO L82 PathProgramCache]: Analyzing trace with hash 192881259, now seen corresponding path program 13 times [2020-10-13 04:40:19,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:19,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080684937] [2020-10-13 04:40:19,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:19,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:19,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:19,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:19,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:19,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:24,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:24,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 04:40:24,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:40:24,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:40:24,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:24,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:40:24,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:40:24,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:40:24,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:24,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:24,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:24,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:24,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:24,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:24,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:24,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:24,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:24,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:24,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:24,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-13 04:40:24,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080684937] [2020-10-13 04:40:24,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:24,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:40:24,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006916910] [2020-10-13 04:40:24,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:40:24,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:24,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:40:24,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:40:24,715 INFO L87 Difference]: Start difference. First operand 187 states and 202 transitions. Second operand 14 states. [2020-10-13 04:40:25,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:25,475 INFO L93 Difference]: Finished difference Result 194 states and 209 transitions. [2020-10-13 04:40:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:40:25,476 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 102 [2020-10-13 04:40:25,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:25,478 INFO L225 Difference]: With dead ends: 194 [2020-10-13 04:40:25,478 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 04:40:25,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:40:25,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 04:40:25,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-10-13 04:40:25,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-13 04:40:25,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2020-10-13 04:40:25,489 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 102 [2020-10-13 04:40:25,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:25,489 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2020-10-13 04:40:25,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:40:25,490 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2020-10-13 04:40:25,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 04:40:25,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:25,491 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:25,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:40:25,492 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:25,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:25,492 INFO L82 PathProgramCache]: Analyzing trace with hash -512707237, now seen corresponding path program 14 times [2020-10-13 04:40:25,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:25,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765603765] [2020-10-13 04:40:25,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:25,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:27,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:30,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:30,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-13 04:40:30,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:30,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 04:40:30,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:30,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 84 [2020-10-13 04:40:30,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:40:30,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-13 04:40:30,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:43,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:43,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:43,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:43,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:43,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:43,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:43,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:43,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:43,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:43,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:43,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 04:40:43,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765603765] [2020-10-13 04:40:43,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:43,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-10-13 04:40:43,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952923766] [2020-10-13 04:40:43,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-10-13 04:40:43,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:43,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-10-13 04:40:43,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=5998, Unknown=0, NotChecked=0, Total=6162 [2020-10-13 04:40:43,173 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand 79 states. [2020-10-13 04:40:58,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:58,109 INFO L93 Difference]: Finished difference Result 213 states and 228 transitions. [2020-10-13 04:40:58,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-13 04:40:58,111 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 118 [2020-10-13 04:40:58,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:58,113 INFO L225 Difference]: With dead ends: 213 [2020-10-13 04:40:58,113 INFO L226 Difference]: Without dead ends: 208 [2020-10-13 04:40:58,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=174, Invalid=6306, Unknown=0, NotChecked=0, Total=6480 [2020-10-13 04:40:58,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-13 04:40:58,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 196. [2020-10-13 04:40:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-13 04:40:58,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 211 transitions. [2020-10-13 04:40:58,143 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 211 transitions. Word has length 118 [2020-10-13 04:40:58,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:58,144 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 211 transitions. [2020-10-13 04:40:58,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-10-13 04:40:58,144 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 211 transitions. [2020-10-13 04:40:58,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 04:40:58,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:58,146 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:58,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:40:58,147 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:58,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:58,147 INFO L82 PathProgramCache]: Analyzing trace with hash 625333785, now seen corresponding path program 15 times [2020-10-13 04:40:58,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:58,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295293733] [2020-10-13 04:40:58,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:58,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:58,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:58,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:58,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:58,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:03,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:03,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 04:41:03,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:41:03,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:41:03,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:03,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:41:03,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 04:41:03,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:41:03,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:03,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:03,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:03,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:03,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:03,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:03,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:41:03,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:03,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:03,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:03,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:03,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:03,454 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-13 04:41:03,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295293733] [2020-10-13 04:41:03,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:03,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:41:03,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613262005] [2020-10-13 04:41:03,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:41:03,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:03,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:41:03,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:41:03,457 INFO L87 Difference]: Start difference. First operand 196 states and 211 transitions. Second operand 16 states. [2020-10-13 04:41:05,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:05,222 INFO L93 Difference]: Finished difference Result 383 states and 416 transitions. [2020-10-13 04:41:05,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:41:05,226 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 120 [2020-10-13 04:41:05,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:05,228 INFO L225 Difference]: With dead ends: 383 [2020-10-13 04:41:05,228 INFO L226 Difference]: Without dead ends: 220 [2020-10-13 04:41:05,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:41:05,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-13 04:41:05,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 205. [2020-10-13 04:41:05,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-13 04:41:05,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 219 transitions. [2020-10-13 04:41:05,249 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 219 transitions. Word has length 120 [2020-10-13 04:41:05,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:05,249 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 219 transitions. [2020-10-13 04:41:05,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:41:05,250 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 219 transitions. [2020-10-13 04:41:05,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 04:41:05,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:05,252 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:05,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:41:05,252 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:05,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:05,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1253292327, now seen corresponding path program 16 times [2020-10-13 04:41:05,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:05,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506235608] [2020-10-13 04:41:05,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:05,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:05,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:05,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:05,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:05,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:05,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:10,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:10,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 04:41:10,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:41:10,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:41:10,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:10,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:41:10,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:41:10,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:41:10,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:10,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:10,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:10,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:10,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:10,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:10,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:10,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:10,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:10,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:10,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:10,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-13 04:41:10,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506235608] [2020-10-13 04:41:10,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:10,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:41:10,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182353833] [2020-10-13 04:41:10,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:41:10,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:10,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:41:10,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:41:10,660 INFO L87 Difference]: Start difference. First operand 205 states and 219 transitions. Second operand 16 states. [2020-10-13 04:41:11,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:11,476 INFO L93 Difference]: Finished difference Result 395 states and 423 transitions. [2020-10-13 04:41:11,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:41:11,479 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 120 [2020-10-13 04:41:11,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:11,481 INFO L225 Difference]: With dead ends: 395 [2020-10-13 04:41:11,481 INFO L226 Difference]: Without dead ends: 208 [2020-10-13 04:41:11,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:41:11,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-13 04:41:11,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2020-10-13 04:41:11,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-13 04:41:11,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 221 transitions. [2020-10-13 04:41:11,502 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 221 transitions. Word has length 120 [2020-10-13 04:41:11,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:11,503 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 221 transitions. [2020-10-13 04:41:11,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:41:11,503 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 221 transitions. [2020-10-13 04:41:11,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 04:41:11,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:11,504 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:11,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:41:11,505 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:11,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:11,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1474720023, now seen corresponding path program 17 times [2020-10-13 04:41:11,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:11,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498034929] [2020-10-13 04:41:11,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:11,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:11,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:11,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:11,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:11,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:11,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:16,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:16,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 04:41:16,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:41:16,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 04:41:16,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:16,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:41:16,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 04:41:16,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:41:16,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:16,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:16,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:16,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:16,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:16,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:16,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:16,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:16,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:16,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:16,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:16,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2020-10-13 04:41:16,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498034929] [2020-10-13 04:41:16,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:16,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:41:16,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580204709] [2020-10-13 04:41:16,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:41:16,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:16,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:41:16,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:41:16,886 INFO L87 Difference]: Start difference. First operand 207 states and 221 transitions. Second operand 16 states. [2020-10-13 04:41:18,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:18,619 INFO L93 Difference]: Finished difference Result 214 states and 228 transitions. [2020-10-13 04:41:18,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:41:18,623 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 122 [2020-10-13 04:41:18,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:18,624 INFO L225 Difference]: With dead ends: 214 [2020-10-13 04:41:18,624 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 04:41:18,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:41:18,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 04:41:18,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-10-13 04:41:18,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 04:41:18,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 145 transitions. [2020-10-13 04:41:18,637 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 145 transitions. Word has length 122 [2020-10-13 04:41:18,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:18,637 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 145 transitions. [2020-10-13 04:41:18,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:41:18,638 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 145 transitions. [2020-10-13 04:41:18,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 04:41:18,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:18,639 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:18,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:41:18,639 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:18,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:18,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1185313271, now seen corresponding path program 18 times [2020-10-13 04:41:18,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:18,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601064570] [2020-10-13 04:41:18,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:18,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:18,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:22,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:27,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:27,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 04:41:27,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:27,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8530 [2020-10-13 04:41:27,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:27,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 102 [2020-10-13 04:41:27,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:41:27,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-13 04:41:27,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:32,852 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-10-13 04:41:33,343 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-10-13 04:41:34,050 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2020-10-13 04:41:34,512 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2020-10-13 04:41:39,182 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-13 04:41:39,713 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-13 04:41:40,399 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-13 04:41:41,127 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-13 04:41:41,839 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-13 04:41:42,517 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-13 04:41:43,193 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-13 04:41:43,854 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-13 04:41:44,514 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-13 04:41:45,095 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-13 04:41:45,718 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-10-13 04:41:46,866 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-13 04:41:47,624 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-13 04:41:48,286 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-10-13 04:41:48,936 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-13 04:41:54,582 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-10-13 04:41:56,334 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40