/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:27:02,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:27:02,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:27:02,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:27:02,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:27:02,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:27:02,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:27:02,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:27:02,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:27:02,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:27:02,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:27:02,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:27:02,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:27:02,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:27:02,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:27:02,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:27:02,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:27:02,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:27:02,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:27:02,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:27:02,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:27:02,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:27:02,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:27:02,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:27:02,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:27:02,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:27:02,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:27:02,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:27:02,393 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:27:02,394 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:27:02,394 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:27:02,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:27:02,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:27:02,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:27:02,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:27:02,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:27:02,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:27:02,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:27:02,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:27:02,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:27:02,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:27:02,412 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 23:27:02,455 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:27:02,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:27:02,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:27:02,457 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:27:02,458 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:27:02,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:27:02,458 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:27:02,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:27:02,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:27:02,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:27:02,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:27:02,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:27:02,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:27:02,459 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:27:02,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:27:02,460 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:27:02,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:27:02,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:27:02,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:27:02,462 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:27:02,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:27:02,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:27:02,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:27:02,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:27:02,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:27:02,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:27:02,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:27:02,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:27:02,463 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:27:02,464 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:27:02,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:27:02,787 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:27:02,790 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:27:02,792 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:27:02,792 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:27:02,793 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i [2020-10-13 23:27:02,862 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa5a5eaa9/39dd38bd9e154ce1abd2a29c7844c49f/FLAG5ab541cc5 [2020-10-13 23:27:03,272 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:27:03,273 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i [2020-10-13 23:27:03,280 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa5a5eaa9/39dd38bd9e154ce1abd2a29c7844c49f/FLAG5ab541cc5 [2020-10-13 23:27:03,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa5a5eaa9/39dd38bd9e154ce1abd2a29c7844c49f [2020-10-13 23:27:03,669 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:27:03,670 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:27:03,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:27:03,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:27:03,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:27:03,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:27:03" (1/1) ... [2020-10-13 23:27:03,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@201c87a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:03, skipping insertion in model container [2020-10-13 23:27:03,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:27:03" (1/1) ... [2020-10-13 23:27:03,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:27:03,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:27:03,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:27:03,874 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:27:03,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:27:03,916 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:27:03,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:03 WrapperNode [2020-10-13 23:27:03,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:27:03,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:27:03,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:27:03,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:27:04,014 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:03" (1/1) ... [2020-10-13 23:27:04,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:03" (1/1) ... [2020-10-13 23:27:04,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:03" (1/1) ... [2020-10-13 23:27:04,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:03" (1/1) ... [2020-10-13 23:27:04,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:03" (1/1) ... [2020-10-13 23:27:04,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:03" (1/1) ... [2020-10-13 23:27:04,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:03" (1/1) ... [2020-10-13 23:27:04,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:27:04,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:27:04,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:27:04,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:27:04,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:03" (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 23:27:04,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:27:04,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:27:04,100 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:27:04,100 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:27:04,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:27:04,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:27:04,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:27:04,100 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:27:04,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:27:04,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:27:04,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:27:04,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:27:04,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:27:04,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:27:04,367 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:27:04,367 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 23:27:04,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:27:04 BoogieIcfgContainer [2020-10-13 23:27:04,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:27:04,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:27:04,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:27:04,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:27:04,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:27:03" (1/3) ... [2020-10-13 23:27:04,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473fb944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:27:04, skipping insertion in model container [2020-10-13 23:27:04,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:03" (2/3) ... [2020-10-13 23:27:04,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473fb944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:27:04, skipping insertion in model container [2020-10-13 23:27:04,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:27:04" (3/3) ... [2020-10-13 23:27:04,380 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-2.i [2020-10-13 23:27:04,391 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:27:04,398 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:27:04,412 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:27:04,436 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:27:04,437 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:27:04,437 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:27:04,437 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:27:04,437 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:27:04,437 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:27:04,438 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:27:04,438 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:27:04,457 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-13 23:27:04,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 23:27:04,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:04,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:04,464 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:04,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:04,470 INFO L82 PathProgramCache]: Analyzing trace with hash 415311520, now seen corresponding path program 1 times [2020-10-13 23:27:04,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:04,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232211552] [2020-10-13 23:27:04,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:04,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:04,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:04,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:04,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:04,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 23:27:04,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:27:04,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-13 23:27:04,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:04,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:04,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:04,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:27:04,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:04,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:27:05,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:05,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:05,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:05,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:05,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:05,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:27:05,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:05,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:05,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:05,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:05,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:05,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:27:05,064 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 23:27:05,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232211552] [2020-10-13 23:27:05,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:27:05,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:27:05,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922746233] [2020-10-13 23:27:05,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:27:05,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:05,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:27:05,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:27:05,093 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-10-13 23:27:05,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:05,188 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2020-10-13 23:27:05,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:27:05,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-13 23:27:05,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:05,199 INFO L225 Difference]: With dead ends: 52 [2020-10-13 23:27:05,200 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 23:27:05,207 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 23:27:05,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 23:27:05,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-13 23:27:05,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 23:27:05,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-13 23:27:05,243 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-10-13 23:27:05,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:05,244 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-13 23:27:05,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:27:05,244 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-13 23:27:05,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 23:27:05,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:05,245 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:05,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:27:05,246 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:05,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:05,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1687882214, now seen corresponding path program 1 times [2020-10-13 23:27:05,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:05,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606319870] [2020-10-13 23:27:05,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:05,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:05,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:05,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:05,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:05,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 23:27:05,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:27:05,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-13 23:27:05,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:05,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:05,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:27:05,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 23:27:05,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:27:05,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:05,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:05,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:05,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:05,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:05,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:05,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:27:05,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:05,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:05,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:05,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:05,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:05,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:27:05,524 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 23:27:05,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606319870] [2020-10-13 23:27:05,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:27:05,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:27:05,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219457934] [2020-10-13 23:27:05,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:27:05,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:05,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:27:05,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:27:05,534 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 4 states. [2020-10-13 23:27:05,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:05,646 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-10-13 23:27:05,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:27:05,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-13 23:27:05,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:05,648 INFO L225 Difference]: With dead ends: 43 [2020-10-13 23:27:05,648 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 23:27:05,650 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 23:27:05,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 23:27:05,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-10-13 23:27:05,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 23:27:05,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-13 23:27:05,658 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-10-13 23:27:05,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:05,659 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-13 23:27:05,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:27:05,659 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-13 23:27:05,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 23:27:05,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:05,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:05,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:27:05,661 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:05,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:05,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1878162454, now seen corresponding path program 1 times [2020-10-13 23:27:05,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:05,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730112699] [2020-10-13 23:27:05,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:05,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:05,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:05,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:05,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:06,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:06,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 23:27:06,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:06,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 714 [2020-10-13 23:27:06,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:06,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:06,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:27:06,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:27:06,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:27:06,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:06,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:06,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:06,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:06,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:06,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:06,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:06,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:27:06,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:06,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:06,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:06,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:06,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:06,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:27:06,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730112699] [2020-10-13 23:27:06,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:27:06,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:27:06,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189394235] [2020-10-13 23:27:06,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:27:06,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:06,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:27:06,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:27:06,432 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 4 states. [2020-10-13 23:27:06,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:06,493 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-13 23:27:06,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:27:06,493 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-13 23:27:06,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:06,495 INFO L225 Difference]: With dead ends: 48 [2020-10-13 23:27:06,495 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 23:27:06,495 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 23:27:06,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 23:27:06,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-13 23:27:06,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 23:27:06,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-13 23:27:06,502 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 21 [2020-10-13 23:27:06,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:06,502 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-13 23:27:06,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:27:06,502 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-13 23:27:06,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 23:27:06,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:06,503 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] [2020-10-13 23:27:06,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:27:06,504 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:06,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:06,504 INFO L82 PathProgramCache]: Analyzing trace with hash -825329612, now seen corresponding path program 1 times [2020-10-13 23:27:06,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:06,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911528074] [2020-10-13 23:27:06,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:06,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:06,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:06,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:06,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:07,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:07,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 23:27:07,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:07,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 899 [2020-10-13 23:27:07,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:07,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:07,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:27:07,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:27:07,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:27:07,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:07,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:07,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:07,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:07,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:07,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:07,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:07,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:07,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:07,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:07,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:07,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:07,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:27:07,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911528074] [2020-10-13 23:27:07,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:07,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:27:07,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24298438] [2020-10-13 23:27:07,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:27:07,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:07,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:27:07,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:27:07,481 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-10-13 23:27:07,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:07,561 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-10-13 23:27:07,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:27:07,561 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-13 23:27:07,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:07,562 INFO L225 Difference]: With dead ends: 49 [2020-10-13 23:27:07,563 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:27:07,563 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 23:27:07,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:27:07,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-13 23:27:07,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 23:27:07,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-13 23:27:07,569 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2020-10-13 23:27:07,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:07,570 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-13 23:27:07,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:27:07,570 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-13 23:27:07,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:27:07,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:07,571 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:07,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:27:07,572 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:07,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:07,572 INFO L82 PathProgramCache]: Analyzing trace with hash 37900592, now seen corresponding path program 2 times [2020-10-13 23:27:07,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:07,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13149679] [2020-10-13 23:27:07,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:07,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:07,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:07,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:07,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:08,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:10,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:10,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:27:10,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:10,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2509 [2020-10-13 23:27:10,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:10,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:10,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:27:10,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 23:27:10,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:27:10,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:10,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:10,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:10,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:10,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:10,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:10,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:10,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:10,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:10,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:10,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:10,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:10,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 23:27:10,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13149679] [2020-10-13 23:27:10,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:10,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:27:10,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733067272] [2020-10-13 23:27:10,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:27:10,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:10,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:27:10,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:27:10,142 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 6 states. [2020-10-13 23:27:10,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:10,231 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-10-13 23:27:10,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:27:10,232 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-13 23:27:10,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:10,233 INFO L225 Difference]: With dead ends: 55 [2020-10-13 23:27:10,233 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 23:27:10,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:27:10,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 23:27:10,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-13 23:27:10,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 23:27:10,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-13 23:27:10,240 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 27 [2020-10-13 23:27:10,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:10,241 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-13 23:27:10,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:27:10,241 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-13 23:27:10,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 23:27:10,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:10,242 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:10,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:27:10,242 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:10,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:10,243 INFO L82 PathProgramCache]: Analyzing trace with hash -378127316, now seen corresponding path program 3 times [2020-10-13 23:27:10,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:10,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482587488] [2020-10-13 23:27:10,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:10,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:10,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:10,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:11,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:15,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:15,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 23:27:15,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:15,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:27:15,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:15,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:15,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:27:15,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:27:15,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:27:15,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 23:27:15,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:15,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:15,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:15,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:15,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:15,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:27:15,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:15,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:15,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:15,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:15,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:15,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 23:27:15,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482587488] [2020-10-13 23:27:15,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:15,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:27:15,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838639321] [2020-10-13 23:27:15,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:27:15,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:15,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:27:15,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:27:15,304 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 5 states. [2020-10-13 23:27:15,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:15,390 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-10-13 23:27:15,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:27:15,390 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-10-13 23:27:15,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:15,391 INFO L225 Difference]: With dead ends: 66 [2020-10-13 23:27:15,391 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 23:27:15,392 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 23:27:15,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 23:27:15,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-13 23:27:15,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 23:27:15,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-13 23:27:15,402 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 31 [2020-10-13 23:27:15,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:15,402 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-13 23:27:15,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:27:15,403 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-13 23:27:15,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 23:27:15,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:15,404 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:15,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:27:15,405 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:15,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:15,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1163143882, now seen corresponding path program 4 times [2020-10-13 23:27:15,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:15,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002425798] [2020-10-13 23:27:15,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:15,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:15,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:15,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:16,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:20,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:20,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 23:27:20,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:20,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:27:20,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:20,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:20,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:27:20,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 23:27:20,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:27:20,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:20,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:20,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:20,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:20,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:20,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:20,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:27:20,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:20,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:20,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:20,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:20,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:20,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 23:27:20,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002425798] [2020-10-13 23:27:20,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:20,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:27:20,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420111355] [2020-10-13 23:27:20,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:27:20,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:20,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:27:20,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:27:20,480 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 7 states. [2020-10-13 23:27:20,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:20,582 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-10-13 23:27:20,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:27:20,583 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-13 23:27:20,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:20,584 INFO L225 Difference]: With dead ends: 63 [2020-10-13 23:27:20,584 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 23:27:20,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:27:20,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 23:27:20,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-13 23:27:20,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 23:27:20,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-13 23:27:20,590 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 33 [2020-10-13 23:27:20,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:20,591 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-13 23:27:20,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:27:20,591 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-13 23:27:20,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:27:20,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:20,592 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:20,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:27:20,592 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:20,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:20,593 INFO L82 PathProgramCache]: Analyzing trace with hash 981379270, now seen corresponding path program 5 times [2020-10-13 23:27:20,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:20,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067503310] [2020-10-13 23:27:20,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:20,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:20,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:20,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:22,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:25,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:25,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 23:27:25,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:25,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:27:25,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:25,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:25,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:27:25,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:27:25,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:27:25,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:25,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:25,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:25,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:25,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:25,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:25,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:25,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:25,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:25,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:25,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:25,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:25,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-13 23:27:25,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067503310] [2020-10-13 23:27:25,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:25,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:27:25,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578956945] [2020-10-13 23:27:25,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:27:25,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:25,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:27:25,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:27:25,662 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 6 states. [2020-10-13 23:27:25,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:25,728 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-10-13 23:27:25,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:27:25,729 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-10-13 23:27:25,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:25,730 INFO L225 Difference]: With dead ends: 76 [2020-10-13 23:27:25,730 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 23:27:25,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:27:25,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 23:27:25,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-13 23:27:25,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 23:27:25,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-13 23:27:25,736 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 37 [2020-10-13 23:27:25,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:25,736 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-13 23:27:25,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:27:25,736 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-13 23:27:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 23:27:25,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:25,738 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:25,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:27:25,738 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:25,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:25,738 INFO L82 PathProgramCache]: Analyzing trace with hash 768256228, now seen corresponding path program 6 times [2020-10-13 23:27:25,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:25,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289921878] [2020-10-13 23:27:25,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:25,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:25,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:25,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:27,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:30,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:30,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:27:30,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:30,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:27:30,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:30,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:30,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:27:30,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:27:30,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:27:30,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:30,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:30,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:30,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:30,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:30,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:30,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:30,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:30,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:30,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:30,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:30,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:30,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 23:27:30,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289921878] [2020-10-13 23:27:30,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:30,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:27:30,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701498782] [2020-10-13 23:27:30,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:27:30,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:30,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:27:30,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:27:30,816 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 8 states. [2020-10-13 23:27:30,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:30,937 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2020-10-13 23:27:30,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:27:30,938 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-13 23:27:30,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:30,940 INFO L225 Difference]: With dead ends: 71 [2020-10-13 23:27:30,940 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 23:27:30,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:27:30,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 23:27:30,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-13 23:27:30,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 23:27:30,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-10-13 23:27:30,951 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 39 [2020-10-13 23:27:30,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:30,952 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-10-13 23:27:30,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:27:30,952 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-10-13 23:27:30,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 23:27:30,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:30,954 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:30,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:27:30,955 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:30,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:30,956 INFO L82 PathProgramCache]: Analyzing trace with hash 747207136, now seen corresponding path program 7 times [2020-10-13 23:27:30,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:30,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519307419] [2020-10-13 23:27:30,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:30,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:30,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:31,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:32,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:35,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:35,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 23:27:35,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:35,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:27:35,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:35,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:35,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:27:35,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:27:35,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:27:35,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:36,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:36,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:36,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:36,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:36,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:36,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:36,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:36,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:36,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:36,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:36,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:36,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-13 23:27:36,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519307419] [2020-10-13 23:27:36,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:36,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:27:36,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853857097] [2020-10-13 23:27:36,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:27:36,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:36,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:27:36,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:27:36,044 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 9 states. [2020-10-13 23:27:36,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:36,152 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2020-10-13 23:27:36,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:27:36,152 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-13 23:27:36,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:36,153 INFO L225 Difference]: With dead ends: 77 [2020-10-13 23:27:36,154 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 23:27:36,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:27:36,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 23:27:36,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-10-13 23:27:36,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:27:36,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-10-13 23:27:36,160 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 43 [2020-10-13 23:27:36,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:36,160 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-10-13 23:27:36,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:27:36,160 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-10-13 23:27:36,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 23:27:36,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:36,161 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:36,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:27:36,162 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:36,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:36,162 INFO L82 PathProgramCache]: Analyzing trace with hash -816292644, now seen corresponding path program 8 times [2020-10-13 23:27:36,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:36,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284854224] [2020-10-13 23:27:36,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:36,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:36,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:36,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:38,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:41,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:41,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 23:27:41,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:41,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:27:41,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:41,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:41,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:27:41,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:27:41,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:27:41,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:41,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:41,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:41,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:41,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:41,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:41,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:41,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:41,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:41,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:41,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:41,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:41,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:41,233 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 23:27:41,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284854224] [2020-10-13 23:27:41,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:41,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:27:41,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137533933] [2020-10-13 23:27:41,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:27:41,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:41,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:27:41,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:27:41,235 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 7 states. [2020-10-13 23:27:41,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:41,300 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-10-13 23:27:41,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:27:41,300 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-10-13 23:27:41,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:41,301 INFO L225 Difference]: With dead ends: 94 [2020-10-13 23:27:41,301 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 23:27:41,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:27:41,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 23:27:41,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-13 23:27:41,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 23:27:41,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-10-13 23:27:41,310 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 47 [2020-10-13 23:27:41,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:41,312 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-10-13 23:27:41,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:27:41,313 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-10-13 23:27:41,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 23:27:41,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:41,313 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:41,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:27:41,314 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:41,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:41,314 INFO L82 PathProgramCache]: Analyzing trace with hash -2039394438, now seen corresponding path program 9 times [2020-10-13 23:27:41,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:41,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379384268] [2020-10-13 23:27:41,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:41,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:41,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:41,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:44,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:46,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:46,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 23:27:46,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:46,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:27:46,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:46,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:46,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:27:46,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:27:46,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:27:46,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:46,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:46,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:46,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:46,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:46,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:46,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:27:46,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:46,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:46,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:46,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:46,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:46,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-13 23:27:46,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379384268] [2020-10-13 23:27:46,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:46,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:27:46,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601085329] [2020-10-13 23:27:46,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:27:46,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:46,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:27:46,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:27:46,411 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 10 states. [2020-10-13 23:27:46,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:46,525 INFO L93 Difference]: Finished difference Result 85 states and 91 transitions. [2020-10-13 23:27:46,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:27:46,526 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2020-10-13 23:27:46,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:46,527 INFO L225 Difference]: With dead ends: 85 [2020-10-13 23:27:46,527 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 23:27:46,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:27:46,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 23:27:46,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-10-13 23:27:46,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 23:27:46,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-13 23:27:46,532 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 49 [2020-10-13 23:27:46,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:46,532 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-13 23:27:46,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:27:46,533 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-13 23:27:46,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 23:27:46,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:46,534 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:46,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:27:46,534 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:46,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:46,534 INFO L82 PathProgramCache]: Analyzing trace with hash 795133302, now seen corresponding path program 10 times [2020-10-13 23:27:46,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:46,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688816226] [2020-10-13 23:27:46,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:46,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:46,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:46,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:51,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:51,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 23:27:51,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:27:51,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:27:51,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:51,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:51,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:27:51,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:27:51,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:27:51,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:51,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:51,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:51,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:51,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:51,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:51,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:51,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:51,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:51,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:51,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:51,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:51,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-13 23:27:51,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688816226] [2020-10-13 23:27:51,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:51,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:27:51,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171883262] [2020-10-13 23:27:51,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:27:51,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:51,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:27:51,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:27:51,607 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 8 states. [2020-10-13 23:27:51,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:51,681 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-10-13 23:27:51,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:27:51,681 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-10-13 23:27:51,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:51,682 INFO L225 Difference]: With dead ends: 104 [2020-10-13 23:27:51,682 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 23:27:51,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:27:51,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 23:27:51,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-13 23:27:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 23:27:51,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-10-13 23:27:51,695 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 53 [2020-10-13 23:27:51,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:51,695 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-10-13 23:27:51,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:27:51,696 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-10-13 23:27:51,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 23:27:51,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:51,696 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:51,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:27:51,697 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:51,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:51,697 INFO L82 PathProgramCache]: Analyzing trace with hash 2123942292, now seen corresponding path program 11 times [2020-10-13 23:27:51,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:51,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943365908] [2020-10-13 23:27:51,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:51,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:51,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:51,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:56,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:56,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 23:27:56,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:27:56,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:27:56,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:56,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:56,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:27:56,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:27:56,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:27:56,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:56,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:56,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:56,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:56,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:56,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:56,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:56,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:56,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:56,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:56,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:56,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:56,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:56,808 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-10-13 23:27:56,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943365908] [2020-10-13 23:27:56,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:56,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:27:56,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188813711] [2020-10-13 23:27:56,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:27:56,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:56,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:27:56,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:27:56,810 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 11 states. [2020-10-13 23:27:56,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:56,930 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2020-10-13 23:27:56,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:27:56,931 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-10-13 23:27:56,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:56,932 INFO L225 Difference]: With dead ends: 93 [2020-10-13 23:27:56,932 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 23:27:56,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:27:56,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 23:27:56,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-10-13 23:27:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:27:56,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-10-13 23:27:56,939 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 55 [2020-10-13 23:27:56,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:56,939 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-10-13 23:27:56,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:27:56,939 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-10-13 23:27:56,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 23:27:56,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:56,940 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:56,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:27:56,941 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:56,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:56,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1865510256, now seen corresponding path program 12 times [2020-10-13 23:27:56,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:56,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603980315] [2020-10-13 23:27:56,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:56,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:56,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:57,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:01,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:01,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 23:28:01,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:28:01,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:28:01,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:01,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:01,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:28:01,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:28:01,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:28:01,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:01,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:01,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:01,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:01,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:01,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:01,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:01,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:01,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:01,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:01,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:01,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:01,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-13 23:28:02,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603980315] [2020-10-13 23:28:02,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:02,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:28:02,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690267428] [2020-10-13 23:28:02,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:28:02,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:02,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:28:02,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:28:02,004 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 9 states. [2020-10-13 23:28:02,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:02,082 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-10-13 23:28:02,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:28:02,082 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-13 23:28:02,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:02,083 INFO L225 Difference]: With dead ends: 114 [2020-10-13 23:28:02,083 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 23:28:02,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:28:02,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 23:28:02,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-13 23:28:02,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 23:28:02,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-10-13 23:28:02,096 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 59 [2020-10-13 23:28:02,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:02,097 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-10-13 23:28:02,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:28:02,097 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-10-13 23:28:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 23:28:02,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:02,097 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:02,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:28:02,098 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:02,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:02,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1961527342, now seen corresponding path program 13 times [2020-10-13 23:28:02,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:02,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265281136] [2020-10-13 23:28:02,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:02,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:02,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:02,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:02,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:07,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:07,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 23:28:07,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:28:07,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:28:07,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:07,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:07,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:28:07,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 23:28:07,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:28:07,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:07,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:07,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:07,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:07,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:07,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:07,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:07,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:07,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:07,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:07,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:07,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:07,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:28:07,199 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 23:28:07,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265281136] [2020-10-13 23:28:07,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:07,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:28:07,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088224471] [2020-10-13 23:28:07,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:28:07,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:07,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:28:07,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:28:07,203 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 12 states. [2020-10-13 23:28:07,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:07,351 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2020-10-13 23:28:07,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:28:07,352 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-10-13 23:28:07,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:07,353 INFO L225 Difference]: With dead ends: 101 [2020-10-13 23:28:07,353 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 23:28:07,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:28:07,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 23:28:07,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-10-13 23:28:07,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 23:28:07,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2020-10-13 23:28:07,359 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 61 [2020-10-13 23:28:07,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:07,359 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2020-10-13 23:28:07,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:28:07,359 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2020-10-13 23:28:07,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:28:07,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:07,360 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:07,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:28:07,360 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:07,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:07,361 INFO L82 PathProgramCache]: Analyzing trace with hash 204497962, now seen corresponding path program 14 times [2020-10-13 23:28:07,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:07,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518628142] [2020-10-13 23:28:07,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:07,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:07,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:07,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:07,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:12,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:12,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 23:28:12,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:28:12,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:28:12,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:12,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:12,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:28:12,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:28:12,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:28:12,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:12,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:12,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:12,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:12,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:12,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:12,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:12,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:12,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:12,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:12,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:12,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:12,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-13 23:28:12,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518628142] [2020-10-13 23:28:12,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:12,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:28:12,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65747880] [2020-10-13 23:28:12,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:28:12,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:12,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:28:12,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:28:12,480 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand 13 states. [2020-10-13 23:28:12,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:12,646 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2020-10-13 23:28:12,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:28:12,647 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-10-13 23:28:12,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:12,648 INFO L225 Difference]: With dead ends: 107 [2020-10-13 23:28:12,648 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 23:28:12,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:28:12,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 23:28:12,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-10-13 23:28:12,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 23:28:12,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-10-13 23:28:12,653 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 65 [2020-10-13 23:28:12,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:12,653 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-10-13 23:28:12,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:28:12,653 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-10-13 23:28:12,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 23:28:12,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:12,654 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:12,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:28:12,655 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:12,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:12,655 INFO L82 PathProgramCache]: Analyzing trace with hash -686239194, now seen corresponding path program 15 times [2020-10-13 23:28:12,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:12,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649870737] [2020-10-13 23:28:12,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:12,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:12,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:13,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:17,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:17,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 23:28:17,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:28:17,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:28:17,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:17,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:17,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:28:17,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:28:17,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:28:17,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:17,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:17,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:17,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:17,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:17,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:17,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:17,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:17,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:17,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:17,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:17,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:17,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:17,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-13 23:28:17,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649870737] [2020-10-13 23:28:17,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:17,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:28:17,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878153887] [2020-10-13 23:28:17,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:28:17,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:17,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:28:17,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:28:17,731 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 10 states. [2020-10-13 23:28:17,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:17,807 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2020-10-13 23:28:17,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:28:17,807 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-10-13 23:28:17,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:17,808 INFO L225 Difference]: With dead ends: 132 [2020-10-13 23:28:17,809 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 23:28:17,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:28:17,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 23:28:17,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-13 23:28:17,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 23:28:17,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-10-13 23:28:17,814 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 69 [2020-10-13 23:28:17,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:17,814 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-10-13 23:28:17,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:28:17,814 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-10-13 23:28:17,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 23:28:17,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:17,815 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:17,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:28:17,816 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:17,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:17,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1504500292, now seen corresponding path program 16 times [2020-10-13 23:28:17,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:17,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009936872] [2020-10-13 23:28:17,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:17,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:17,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:18,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:22,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:22,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 23:28:22,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:28:22,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:28:22,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:22,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:22,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:28:22,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:28:22,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:28:22,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:22,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:22,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:22,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:22,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:22,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:22,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:22,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:22,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:22,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:22,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:22,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:22,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:22,943 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2020-10-13 23:28:22,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009936872] [2020-10-13 23:28:22,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:22,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:28:22,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291644924] [2020-10-13 23:28:22,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:28:22,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:22,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:28:22,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:28:22,945 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 14 states. [2020-10-13 23:28:23,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:23,084 INFO L93 Difference]: Finished difference Result 115 states and 121 transitions. [2020-10-13 23:28:23,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:28:23,085 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2020-10-13 23:28:23,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:23,086 INFO L225 Difference]: With dead ends: 115 [2020-10-13 23:28:23,086 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 23:28:23,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:28:23,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 23:28:23,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-10-13 23:28:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 23:28:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2020-10-13 23:28:23,090 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 71 [2020-10-13 23:28:23,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:23,090 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2020-10-13 23:28:23,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:28:23,090 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2020-10-13 23:28:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 23:28:23,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:23,091 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:23,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:28:23,091 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:23,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:23,091 INFO L82 PathProgramCache]: Analyzing trace with hash -494560448, now seen corresponding path program 17 times [2020-10-13 23:28:23,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:23,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116301760] [2020-10-13 23:28:23,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:23,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:23,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:23,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:28,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:28,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 23:28:28,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:28:28,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 23:28:28,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:28,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:28,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:28:28,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:28:28,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:28:28,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:28,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:28,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:28,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:28,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:28,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:28,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:28,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:28,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:28,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:28,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:28,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:28,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:28,188 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-10-13 23:28:28,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116301760] [2020-10-13 23:28:28,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:28,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:28:28,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892703771] [2020-10-13 23:28:28,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:28:28,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:28,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:28:28,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:28:28,189 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 11 states. [2020-10-13 23:28:28,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:28,258 INFO L93 Difference]: Finished difference Result 142 states and 148 transitions. [2020-10-13 23:28:28,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:28:28,258 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 75 [2020-10-13 23:28:28,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:28,259 INFO L225 Difference]: With dead ends: 142 [2020-10-13 23:28:28,259 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 23:28:28,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:28:28,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 23:28:28,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-13 23:28:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 23:28:28,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-10-13 23:28:28,264 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 75 [2020-10-13 23:28:28,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:28,265 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-10-13 23:28:28,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:28:28,265 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-10-13 23:28:28,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 23:28:28,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:28,266 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:28,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:28:28,266 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:28,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:28,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1964075810, now seen corresponding path program 18 times [2020-10-13 23:28:28,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:28,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584285324] [2020-10-13 23:28:28,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:28,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:28,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:28,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:33,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:33,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 23:28:33,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:28:33,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:28:33,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:33,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:33,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:28:33,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 23:28:33,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:28:33,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:33,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:33,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:33,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:33,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:33,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:33,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:33,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:33,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:33,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:33,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:33,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:33,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2020-10-13 23:28:33,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584285324] [2020-10-13 23:28:33,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:33,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:28:33,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741482475] [2020-10-13 23:28:33,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:28:33,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:33,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:28:33,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:28:33,413 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 15 states. [2020-10-13 23:28:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:33,589 INFO L93 Difference]: Finished difference Result 123 states and 129 transitions. [2020-10-13 23:28:33,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:28:33,589 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 77 [2020-10-13 23:28:33,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:33,590 INFO L225 Difference]: With dead ends: 123 [2020-10-13 23:28:33,591 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 23:28:33,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:28:33,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 23:28:33,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-10-13 23:28:33,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 23:28:33,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2020-10-13 23:28:33,596 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 77 [2020-10-13 23:28:33,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:33,596 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2020-10-13 23:28:33,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:28:33,597 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2020-10-13 23:28:33,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 23:28:33,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:33,597 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:33,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:28:33,598 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:33,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:33,598 INFO L82 PathProgramCache]: Analyzing trace with hash -184194854, now seen corresponding path program 19 times [2020-10-13 23:28:33,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:33,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395667920] [2020-10-13 23:28:33,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:33,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:33,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:33,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:38,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:38,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 23:28:38,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:28:38,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 23:28:38,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:38,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:38,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:28:38,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 23:28:38,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:28:38,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:38,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:38,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:38,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:38,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:38,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:38,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:38,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:38,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:38,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:38,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:38,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:38,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2020-10-13 23:28:38,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395667920] [2020-10-13 23:28:38,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:38,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:28:38,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874461330] [2020-10-13 23:28:38,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:28:38,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:38,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:28:38,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:28:38,759 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 16 states. [2020-10-13 23:28:38,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:38,932 INFO L93 Difference]: Finished difference Result 129 states and 135 transitions. [2020-10-13 23:28:38,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:28:38,935 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2020-10-13 23:28:38,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:38,936 INFO L225 Difference]: With dead ends: 129 [2020-10-13 23:28:38,936 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 23:28:38,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:28:38,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 23:28:38,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2020-10-13 23:28:38,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 23:28:38,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2020-10-13 23:28:38,941 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 81 [2020-10-13 23:28:38,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:38,941 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2020-10-13 23:28:38,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:28:38,941 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2020-10-13 23:28:38,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 23:28:38,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:38,942 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:38,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:28:38,942 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:38,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:38,943 INFO L82 PathProgramCache]: Analyzing trace with hash -351351082, now seen corresponding path program 20 times [2020-10-13 23:28:38,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:38,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106040551] [2020-10-13 23:28:38,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:38,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:38,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:43,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:43,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:43,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 23:28:43,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:28:43,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:28:43,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:43,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:43,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:28:43,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:28:43,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:28:43,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:44,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:44,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:44,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:44,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:44,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:44,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:44,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:44,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:44,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:44,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:44,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:44,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-10-13 23:28:44,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106040551] [2020-10-13 23:28:44,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:44,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:28:44,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378420383] [2020-10-13 23:28:44,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:28:44,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:44,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:28:44,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:28:44,037 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand 12 states. [2020-10-13 23:28:44,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:44,139 INFO L93 Difference]: Finished difference Result 160 states and 166 transitions. [2020-10-13 23:28:44,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:28:44,140 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2020-10-13 23:28:44,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:44,140 INFO L225 Difference]: With dead ends: 160 [2020-10-13 23:28:44,141 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 23:28:44,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:28:44,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 23:28:44,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-13 23:28:44,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 23:28:44,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2020-10-13 23:28:44,145 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 85 [2020-10-13 23:28:44,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:44,145 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2020-10-13 23:28:44,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:28:44,145 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2020-10-13 23:28:44,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 23:28:44,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:44,146 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:44,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:28:44,146 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:44,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:44,147 INFO L82 PathProgramCache]: Analyzing trace with hash -2005214476, now seen corresponding path program 21 times [2020-10-13 23:28:44,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:44,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162524966] [2020-10-13 23:28:44,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:44,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:44,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:49,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:49,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 23:28:49,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:28:49,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 23:28:49,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:49,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:49,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:28:49,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:28:49,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:28:49,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:49,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:49,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:49,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:49,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:49,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:49,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:49,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:49,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:49,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:49,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:49,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:49,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2020-10-13 23:28:49,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162524966] [2020-10-13 23:28:49,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:49,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:28:49,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793595975] [2020-10-13 23:28:49,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:28:49,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:49,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:28:49,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:28:49,334 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 17 states. [2020-10-13 23:28:49,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:49,521 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2020-10-13 23:28:49,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:28:49,522 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 87 [2020-10-13 23:28:49,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:49,523 INFO L225 Difference]: With dead ends: 137 [2020-10-13 23:28:49,523 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 23:28:49,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:28:49,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 23:28:49,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-10-13 23:28:49,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 23:28:49,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2020-10-13 23:28:49,530 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 87 [2020-10-13 23:28:49,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:49,530 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2020-10-13 23:28:49,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:28:49,530 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2020-10-13 23:28:49,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 23:28:49,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:49,531 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:49,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:28:49,534 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:49,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:49,535 INFO L82 PathProgramCache]: Analyzing trace with hash -970812432, now seen corresponding path program 22 times [2020-10-13 23:28:49,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:49,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353325189] [2020-10-13 23:28:49,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:49,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:49,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:54,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:54,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 23:28:54,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:28:54,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:28:54,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:54,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:54,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:28:54,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:28:54,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:28:54,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:54,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:54,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:54,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:54,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:54,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:54,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:54,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:54,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:54,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:54,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:54,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:54,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-13 23:28:54,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353325189] [2020-10-13 23:28:54,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:54,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:28:54,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792948272] [2020-10-13 23:28:54,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:28:54,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:54,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:28:54,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:28:54,642 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand 13 states. [2020-10-13 23:28:54,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:54,741 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2020-10-13 23:28:54,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:28:54,742 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 91 [2020-10-13 23:28:54,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:54,743 INFO L225 Difference]: With dead ends: 170 [2020-10-13 23:28:54,743 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 23:28:54,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:28:54,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 23:28:54,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-13 23:28:54,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 23:28:54,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2020-10-13 23:28:54,748 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 91 [2020-10-13 23:28:54,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:54,748 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2020-10-13 23:28:54,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:28:54,748 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2020-10-13 23:28:54,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 23:28:54,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:54,749 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:54,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:28:54,750 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:54,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:54,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1605332594, now seen corresponding path program 23 times [2020-10-13 23:28:54,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:54,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907175938] [2020-10-13 23:28:54,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:54,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:54,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:59,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:59,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-13 23:28:59,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:28:59,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:28:59,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:59,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:59,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:28:59,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 23:28:59,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:28:59,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:59,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:59,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:59,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:59,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:59,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:59,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:59,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:59,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:59,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:59,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:59,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:59,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:59,942 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2020-10-13 23:28:59,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907175938] [2020-10-13 23:28:59,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:59,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:28:59,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957732006] [2020-10-13 23:28:59,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:28:59,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:59,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:28:59,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:28:59,944 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand 18 states. [2020-10-13 23:29:00,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:00,160 INFO L93 Difference]: Finished difference Result 145 states and 151 transitions. [2020-10-13 23:29:00,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:29:00,160 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 93 [2020-10-13 23:29:00,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:00,161 INFO L225 Difference]: With dead ends: 145 [2020-10-13 23:29:00,162 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 23:29:00,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:29:00,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 23:29:00,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-10-13 23:29:00,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 23:29:00,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2020-10-13 23:29:00,173 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 93 [2020-10-13 23:29:00,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:00,173 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2020-10-13 23:29:00,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:29:00,173 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2020-10-13 23:29:00,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 23:29:00,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:00,174 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:00,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:29:00,175 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:00,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:00,179 INFO L82 PathProgramCache]: Analyzing trace with hash 275013002, now seen corresponding path program 24 times [2020-10-13 23:29:00,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:00,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421836076] [2020-10-13 23:29:00,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:00,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:00,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:05,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:05,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 23:29:05,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:29:05,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 23:29:05,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:05,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:05,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:29:05,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:29:05,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:29:05,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:05,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:05,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:05,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:05,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:05,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:05,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:05,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:05,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:05,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:05,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:05,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:05,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2020-10-13 23:29:05,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421836076] [2020-10-13 23:29:05,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:05,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:29:05,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505476150] [2020-10-13 23:29:05,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:29:05,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:05,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:29:05,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:29:05,332 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand 14 states. [2020-10-13 23:29:05,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:05,437 INFO L93 Difference]: Finished difference Result 180 states and 186 transitions. [2020-10-13 23:29:05,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:29:05,437 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 97 [2020-10-13 23:29:05,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:05,438 INFO L225 Difference]: With dead ends: 180 [2020-10-13 23:29:05,439 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 23:29:05,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:29:05,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 23:29:05,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-13 23:29:05,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 23:29:05,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2020-10-13 23:29:05,444 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 97 [2020-10-13 23:29:05,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:05,444 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2020-10-13 23:29:05,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:29:05,445 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2020-10-13 23:29:05,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 23:29:05,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:05,446 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:05,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:29:05,446 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:05,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:05,446 INFO L82 PathProgramCache]: Analyzing trace with hash 58272936, now seen corresponding path program 25 times [2020-10-13 23:29:05,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:05,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093667198] [2020-10-13 23:29:05,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:05,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:05,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:10,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:10,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 23:29:10,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:29:10,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-13 23:29:10,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:10,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:10,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:29:10,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:29:10,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:29:10,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:10,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:10,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:10,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:10,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:10,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:10,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:10,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:10,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:10,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:10,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:10,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:10,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:10,675 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2020-10-13 23:29:10,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093667198] [2020-10-13 23:29:10,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:10,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:29:10,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632003784] [2020-10-13 23:29:10,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:29:10,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:10,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:29:10,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:29:10,677 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand 19 states. [2020-10-13 23:29:10,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:10,891 INFO L93 Difference]: Finished difference Result 153 states and 159 transitions. [2020-10-13 23:29:10,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:29:10,891 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 99 [2020-10-13 23:29:10,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:10,892 INFO L225 Difference]: With dead ends: 153 [2020-10-13 23:29:10,892 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 23:29:10,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:29:10,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 23:29:10,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2020-10-13 23:29:10,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 23:29:10,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2020-10-13 23:29:10,898 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 99 [2020-10-13 23:29:10,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:10,898 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2020-10-13 23:29:10,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:29:10,898 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2020-10-13 23:29:10,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 23:29:10,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:10,899 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:10,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:29:10,900 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:10,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:10,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1165413284, now seen corresponding path program 26 times [2020-10-13 23:29:10,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:10,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91331743] [2020-10-13 23:29:10,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:10,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:10,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:15,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:15,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 23:29:15,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:29:15,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:29:15,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:15,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:15,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:29:15,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:29:15,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:29:15,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:16,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:16,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:16,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:16,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:16,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:16,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:16,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:16,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:16,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:16,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:16,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:16,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-10-13 23:29:16,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91331743] [2020-10-13 23:29:16,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:16,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:29:16,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931384645] [2020-10-13 23:29:16,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:29:16,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:16,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:29:16,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:29:16,117 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand 20 states. [2020-10-13 23:29:16,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:16,324 INFO L93 Difference]: Finished difference Result 159 states and 165 transitions. [2020-10-13 23:29:16,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:29:16,325 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-10-13 23:29:16,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:16,326 INFO L225 Difference]: With dead ends: 159 [2020-10-13 23:29:16,326 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 23:29:16,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:29:16,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 23:29:16,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-10-13 23:29:16,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 23:29:16,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2020-10-13 23:29:16,334 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 103 [2020-10-13 23:29:16,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:16,334 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2020-10-13 23:29:16,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:29:16,335 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2020-10-13 23:29:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 23:29:16,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:16,336 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:16,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:29:16,336 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:16,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:16,337 INFO L82 PathProgramCache]: Analyzing trace with hash 286882976, now seen corresponding path program 27 times [2020-10-13 23:29:16,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:16,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469834123] [2020-10-13 23:29:16,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:16,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:16,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:21,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:21,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 23:29:21,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:29:21,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-13 23:29:21,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:21,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:21,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:29:21,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:29:21,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:29:21,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:21,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:21,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:21,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:21,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:21,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:21,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:21,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:21,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:21,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:21,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:21,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:21,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2020-10-13 23:29:21,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469834123] [2020-10-13 23:29:21,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:21,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:29:21,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654439261] [2020-10-13 23:29:21,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:29:21,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:21,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:29:21,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:29:21,524 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand 15 states. [2020-10-13 23:29:21,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:21,646 INFO L93 Difference]: Finished difference Result 198 states and 204 transitions. [2020-10-13 23:29:21,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:29:21,646 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 107 [2020-10-13 23:29:21,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:21,647 INFO L225 Difference]: With dead ends: 198 [2020-10-13 23:29:21,647 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 23:29:21,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:29:21,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 23:29:21,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-13 23:29:21,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 23:29:21,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2020-10-13 23:29:21,658 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 107 [2020-10-13 23:29:21,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:21,658 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2020-10-13 23:29:21,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:29:21,658 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2020-10-13 23:29:21,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 23:29:21,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:21,660 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:21,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:29:21,660 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:21,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:21,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1702592962, now seen corresponding path program 28 times [2020-10-13 23:29:21,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:21,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264105322] [2020-10-13 23:29:21,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:21,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:21,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:26,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:26,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 23:29:26,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:29:26,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-13 23:29:26,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:26,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:26,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:29:26,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 23:29:26,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:29:26,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:26,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:26,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:26,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:26,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:26,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:26,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:26,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:26,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:26,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:26,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:26,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:26,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2020-10-13 23:29:26,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264105322] [2020-10-13 23:29:26,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:26,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:29:26,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82944922] [2020-10-13 23:29:26,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:29:26,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:26,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:29:26,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:29:26,928 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand 21 states. [2020-10-13 23:29:27,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:27,175 INFO L93 Difference]: Finished difference Result 167 states and 173 transitions. [2020-10-13 23:29:27,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:29:27,175 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-10-13 23:29:27,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:27,176 INFO L225 Difference]: With dead ends: 167 [2020-10-13 23:29:27,176 INFO L226 Difference]: Without dead ends: 120 [2020-10-13 23:29:27,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:29:27,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-13 23:29:27,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2020-10-13 23:29:27,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 23:29:27,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2020-10-13 23:29:27,184 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 109 [2020-10-13 23:29:27,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:27,185 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2020-10-13 23:29:27,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:29:27,185 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2020-10-13 23:29:27,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 23:29:27,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:27,189 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:27,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:29:27,189 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:27,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:27,189 INFO L82 PathProgramCache]: Analyzing trace with hash 515981882, now seen corresponding path program 29 times [2020-10-13 23:29:27,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:27,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898409632] [2020-10-13 23:29:27,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:27,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:27,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:32,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:32,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 23:29:32,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:29:32,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-13 23:29:32,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:32,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:32,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:29:32,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:29:32,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:29:32,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:32,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:32,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:32,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:32,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:32,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:32,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:32,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:32,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:32,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:32,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:32,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:32,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-10-13 23:29:32,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898409632] [2020-10-13 23:29:32,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:32,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:29:32,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728956268] [2020-10-13 23:29:32,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:29:32,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:32,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:29:32,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:29:32,392 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand 16 states. [2020-10-13 23:29:32,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:32,510 INFO L93 Difference]: Finished difference Result 208 states and 214 transitions. [2020-10-13 23:29:32,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:29:32,511 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 113 [2020-10-13 23:29:32,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:32,512 INFO L225 Difference]: With dead ends: 208 [2020-10-13 23:29:32,512 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 23:29:32,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:29:32,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 23:29:32,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-13 23:29:32,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 23:29:32,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2020-10-13 23:29:32,518 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 113 [2020-10-13 23:29:32,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:32,518 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2020-10-13 23:29:32,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:29:32,519 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2020-10-13 23:29:32,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 23:29:32,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:32,520 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:32,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:29:32,520 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:32,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:32,520 INFO L82 PathProgramCache]: Analyzing trace with hash 943723864, now seen corresponding path program 30 times [2020-10-13 23:29:32,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:32,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51415625] [2020-10-13 23:29:32,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:32,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:32,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:37,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:37,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-13 23:29:37,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:29:37,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-13 23:29:37,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:37,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:37,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:29:37,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:29:37,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:29:37,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:37,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:37,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:37,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:37,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:37,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:37,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:37,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:37,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:37,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:37,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:37,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:37,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2020-10-13 23:29:37,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51415625] [2020-10-13 23:29:37,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:37,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:29:37,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800023280] [2020-10-13 23:29:37,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:29:37,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:37,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:29:37,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:29:37,821 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand 22 states. [2020-10-13 23:29:38,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:38,077 INFO L93 Difference]: Finished difference Result 175 states and 181 transitions. [2020-10-13 23:29:38,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:29:38,077 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2020-10-13 23:29:38,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:38,078 INFO L225 Difference]: With dead ends: 175 [2020-10-13 23:29:38,079 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 23:29:38,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:29:38,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 23:29:38,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-10-13 23:29:38,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 23:29:38,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2020-10-13 23:29:38,089 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 115 [2020-10-13 23:29:38,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:38,090 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2020-10-13 23:29:38,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:29:38,090 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2020-10-13 23:29:38,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 23:29:38,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:38,091 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:38,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:29:38,091 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:38,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:38,096 INFO L82 PathProgramCache]: Analyzing trace with hash 2081729620, now seen corresponding path program 31 times [2020-10-13 23:29:38,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:38,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120078741] [2020-10-13 23:29:38,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:38,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:38,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:43,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:43,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 23:29:43,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:29:43,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-13 23:29:43,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:43,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:43,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:29:43,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:29:43,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:29:43,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:43,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:43,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:43,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:43,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:43,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:43,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:43,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:43,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:43,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:43,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:43,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:43,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 530 trivial. 0 not checked. [2020-10-13 23:29:43,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120078741] [2020-10-13 23:29:43,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:43,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:29:43,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627077105] [2020-10-13 23:29:43,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:29:43,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:43,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:29:43,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:29:43,443 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand 23 states. [2020-10-13 23:29:43,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:43,642 INFO L93 Difference]: Finished difference Result 181 states and 187 transitions. [2020-10-13 23:29:43,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:29:43,642 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 119 [2020-10-13 23:29:43,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:43,644 INFO L225 Difference]: With dead ends: 181 [2020-10-13 23:29:43,644 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 23:29:43,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:29:43,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 23:29:43,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2020-10-13 23:29:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 23:29:43,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2020-10-13 23:29:43,649 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 119 [2020-10-13 23:29:43,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:43,649 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2020-10-13 23:29:43,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:29:43,650 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2020-10-13 23:29:43,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 23:29:43,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:43,651 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:43,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:29:43,651 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:43,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:43,651 INFO L82 PathProgramCache]: Analyzing trace with hash 165565776, now seen corresponding path program 32 times [2020-10-13 23:29:43,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:43,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126313866] [2020-10-13 23:29:43,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:43,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:43,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:48,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:48,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 23:29:48,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:29:48,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-13 23:29:48,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:48,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:48,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:29:48,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:29:48,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:29:48,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:48,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:48,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:48,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:48,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:48,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:48,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:48,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:48,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:48,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:48,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:48,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:48,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-10-13 23:29:48,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126313866] [2020-10-13 23:29:48,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:48,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:29:48,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103965460] [2020-10-13 23:29:48,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:29:48,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:48,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:29:48,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:29:48,883 INFO L87 Difference]: Start difference. First operand 128 states and 131 transitions. Second operand 17 states. [2020-10-13 23:29:48,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:48,973 INFO L93 Difference]: Finished difference Result 226 states and 232 transitions. [2020-10-13 23:29:48,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:29:48,973 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 123 [2020-10-13 23:29:48,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:48,974 INFO L225 Difference]: With dead ends: 226 [2020-10-13 23:29:48,975 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 23:29:48,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:29:48,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 23:29:48,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-10-13 23:29:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 23:29:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2020-10-13 23:29:48,981 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 123 [2020-10-13 23:29:48,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:48,981 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2020-10-13 23:29:48,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:29:48,981 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2020-10-13 23:29:48,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 23:29:48,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:48,982 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:48,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:29:48,982 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:48,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:48,983 INFO L82 PathProgramCache]: Analyzing trace with hash -805414162, now seen corresponding path program 33 times [2020-10-13 23:29:48,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:48,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692048041] [2020-10-13 23:29:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:49,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:49,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:54,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:54,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-13 23:29:54,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:29:54,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-13 23:29:54,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:54,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:54,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:29:54,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 23:29:54,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:29:54,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:54,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:54,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:54,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:54,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:54,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:54,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:54,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:54,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:54,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:54,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:54,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:54,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 596 trivial. 0 not checked. [2020-10-13 23:29:54,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692048041] [2020-10-13 23:29:54,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:54,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:29:54,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830861243] [2020-10-13 23:29:54,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:29:54,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:54,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:29:54,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:29:54,323 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand 24 states. [2020-10-13 23:29:54,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:54,562 INFO L93 Difference]: Finished difference Result 189 states and 195 transitions. [2020-10-13 23:29:54,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:29:54,563 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 125 [2020-10-13 23:29:54,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:54,564 INFO L225 Difference]: With dead ends: 189 [2020-10-13 23:29:54,564 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 23:29:54,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:29:54,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 23:29:54,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-10-13 23:29:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-13 23:29:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 137 transitions. [2020-10-13 23:29:54,571 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 137 transitions. Word has length 125 [2020-10-13 23:29:54,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:54,571 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 137 transitions. [2020-10-13 23:29:54,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:29:54,571 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 137 transitions. [2020-10-13 23:29:54,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-13 23:29:54,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:54,572 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:54,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:29:54,573 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:54,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:54,573 INFO L82 PathProgramCache]: Analyzing trace with hash 294655722, now seen corresponding path program 34 times [2020-10-13 23:29:54,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:54,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097870947] [2020-10-13 23:29:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:54,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:54,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:59,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:59,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-13 23:29:59,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:29:59,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 23:29:59,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:59,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:59,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:29:59,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:29:59,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:29:59,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:59,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:59,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:59,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:59,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:59,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:59,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:59,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:59,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:59,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:59,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:59,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:59,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2020-10-13 23:29:59,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097870947] [2020-10-13 23:29:59,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:59,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:29:59,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933392917] [2020-10-13 23:29:59,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:29:59,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:59,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:29:59,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:29:59,772 INFO L87 Difference]: Start difference. First operand 134 states and 137 transitions. Second operand 18 states. [2020-10-13 23:29:59,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:59,884 INFO L93 Difference]: Finished difference Result 236 states and 242 transitions. [2020-10-13 23:29:59,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:29:59,884 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 129 [2020-10-13 23:29:59,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:59,887 INFO L225 Difference]: With dead ends: 236 [2020-10-13 23:29:59,887 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 23:29:59,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:29:59,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 23:29:59,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-13 23:29:59,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 23:29:59,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2020-10-13 23:29:59,895 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 129 [2020-10-13 23:29:59,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:59,896 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2020-10-13 23:29:59,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:29:59,896 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2020-10-13 23:29:59,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 23:29:59,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:59,897 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:59,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:29:59,898 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:59,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:59,898 INFO L82 PathProgramCache]: Analyzing trace with hash -453972472, now seen corresponding path program 35 times [2020-10-13 23:29:59,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:59,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097769864] [2020-10-13 23:29:59,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:59,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:59,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:04,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:04,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 23:30:04,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:30:04,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-13 23:30:04,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:04,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:04,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:30:04,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 23:30:04,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:30:04,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:05,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:05,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:05,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:05,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:05,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:05,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:05,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:05,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:05,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:05,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:05,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:05,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2020-10-13 23:30:05,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097769864] [2020-10-13 23:30:05,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:05,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:30:05,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190838612] [2020-10-13 23:30:05,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:30:05,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:05,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:30:05,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:30:05,282 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand 25 states. [2020-10-13 23:30:05,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:05,492 INFO L93 Difference]: Finished difference Result 197 states and 203 transitions. [2020-10-13 23:30:05,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:30:05,493 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 131 [2020-10-13 23:30:05,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:05,494 INFO L225 Difference]: With dead ends: 197 [2020-10-13 23:30:05,494 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 23:30:05,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:30:05,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 23:30:05,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-10-13 23:30:05,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 23:30:05,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 143 transitions. [2020-10-13 23:30:05,500 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 143 transitions. Word has length 131 [2020-10-13 23:30:05,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:05,501 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 143 transitions. [2020-10-13 23:30:05,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:30:05,501 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 143 transitions. [2020-10-13 23:30:05,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-13 23:30:05,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:05,502 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:05,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:30:05,502 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:05,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:05,503 INFO L82 PathProgramCache]: Analyzing trace with hash 147356932, now seen corresponding path program 36 times [2020-10-13 23:30:05,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:05,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533536266] [2020-10-13 23:30:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:05,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:05,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:10,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:10,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-13 23:30:10,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:30:10,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5100 [2020-10-13 23:30:10,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:10,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:10,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:30:10,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:30:10,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:30:10,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:10,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:10,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:10,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:10,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:10,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:10,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:10,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:10,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:10,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:10,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:10,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:10,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2020-10-13 23:30:10,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533536266] [2020-10-13 23:30:10,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:10,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:30:10,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122603452] [2020-10-13 23:30:10,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:30:10,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:10,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:30:10,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:30:10,809 INFO L87 Difference]: Start difference. First operand 140 states and 143 transitions. Second operand 19 states. [2020-10-13 23:30:10,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:10,951 INFO L93 Difference]: Finished difference Result 246 states and 252 transitions. [2020-10-13 23:30:10,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:30:10,952 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 135 [2020-10-13 23:30:10,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:10,953 INFO L225 Difference]: With dead ends: 246 [2020-10-13 23:30:10,953 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 23:30:10,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:30:10,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 23:30:10,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-10-13 23:30:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 23:30:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2020-10-13 23:30:10,959 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 135 [2020-10-13 23:30:10,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:10,959 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2020-10-13 23:30:10,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:30:10,960 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2020-10-13 23:30:10,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 23:30:10,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:10,961 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:10,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:30:10,961 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:10,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:10,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1659307426, now seen corresponding path program 37 times [2020-10-13 23:30:10,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:10,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588468090] [2020-10-13 23:30:10,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:10,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:11,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:16,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:16,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 23:30:16,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:30:16,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5097 [2020-10-13 23:30:16,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:16,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:16,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:30:16,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:30:16,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:30:16,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:16,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:16,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:16,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:16,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:16,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:16,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:16,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:16,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:16,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:16,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:16,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:16,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 740 trivial. 0 not checked. [2020-10-13 23:30:16,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588468090] [2020-10-13 23:30:16,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:16,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:30:16,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634120781] [2020-10-13 23:30:16,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:30:16,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:16,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:30:16,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:30:16,463 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand 26 states. [2020-10-13 23:30:16,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:16,790 INFO L93 Difference]: Finished difference Result 205 states and 211 transitions. [2020-10-13 23:30:16,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:30:16,790 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 137 [2020-10-13 23:30:16,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:16,792 INFO L225 Difference]: With dead ends: 205 [2020-10-13 23:30:16,792 INFO L226 Difference]: Without dead ends: 148 [2020-10-13 23:30:16,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:30:16,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-13 23:30:16,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-10-13 23:30:16,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-13 23:30:16,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 149 transitions. [2020-10-13 23:30:16,801 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 149 transitions. Word has length 137 [2020-10-13 23:30:16,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:16,802 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 149 transitions. [2020-10-13 23:30:16,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:30:16,802 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 149 transitions. [2020-10-13 23:30:16,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-13 23:30:16,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:16,804 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:16,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:30:16,804 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:16,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:16,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1211246494, now seen corresponding path program 38 times [2020-10-13 23:30:16,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:16,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124158837] [2020-10-13 23:30:16,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:16,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:16,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:21,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:21,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-13 23:30:21,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:30:21,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5099 [2020-10-13 23:30:21,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:21,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:21,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:30:21,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:30:21,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 23:30:21,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:22,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:22,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:22,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:22,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:22,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:22,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:22,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:22,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:22,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:22,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:22,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:22,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1314 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 785 trivial. 0 not checked. [2020-10-13 23:30:22,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124158837] [2020-10-13 23:30:22,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:22,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:30:22,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060480421] [2020-10-13 23:30:22,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:30:22,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:22,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:30:22,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:30:22,347 INFO L87 Difference]: Start difference. First operand 146 states and 149 transitions. Second operand 27 states. [2020-10-13 23:30:22,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:22,638 INFO L93 Difference]: Finished difference Result 211 states and 217 transitions. [2020-10-13 23:30:22,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:30:22,639 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 141 [2020-10-13 23:30:22,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:22,640 INFO L225 Difference]: With dead ends: 211 [2020-10-13 23:30:22,640 INFO L226 Difference]: Without dead ends: 152 [2020-10-13 23:30:22,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:30:22,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-13 23:30:22,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2020-10-13 23:30:22,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-13 23:30:22,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2020-10-13 23:30:22,655 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 141 [2020-10-13 23:30:22,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:22,655 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2020-10-13 23:30:22,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:30:22,655 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2020-10-13 23:30:22,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-13 23:30:22,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:22,656 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:22,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:30:22,657 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:22,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:22,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1262803866, now seen corresponding path program 39 times [2020-10-13 23:30:22,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:22,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813667707] [2020-10-13 23:30:22,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:22,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:22,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:27,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:27,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-13 23:30:27,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:30:27,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-13 23:30:27,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:27,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:27,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:30:27,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:30:27,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:30:27,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:27,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:27,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:27,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:27,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:27,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:27,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:27,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:27,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:27,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:27,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:27,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:27,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:27,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2020-10-13 23:30:27,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813667707] [2020-10-13 23:30:27,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:27,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:30:27,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224243791] [2020-10-13 23:30:27,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:30:27,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:27,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:30:27,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:30:27,971 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand 20 states. [2020-10-13 23:30:28,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:28,081 INFO L93 Difference]: Finished difference Result 264 states and 270 transitions. [2020-10-13 23:30:28,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:30:28,082 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 145 [2020-10-13 23:30:28,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:28,083 INFO L225 Difference]: With dead ends: 264 [2020-10-13 23:30:28,083 INFO L226 Difference]: Without dead ends: 153 [2020-10-13 23:30:28,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:30:28,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-13 23:30:28,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2020-10-13 23:30:28,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-13 23:30:28,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2020-10-13 23:30:28,089 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 145 [2020-10-13 23:30:28,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:28,090 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2020-10-13 23:30:28,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:30:28,090 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2020-10-13 23:30:28,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 23:30:28,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:28,091 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:28,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:30:28,092 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:28,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:28,092 INFO L82 PathProgramCache]: Analyzing trace with hash 2080356024, now seen corresponding path program 40 times [2020-10-13 23:30:28,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:28,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485123577] [2020-10-13 23:30:28,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:28,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:28,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:33,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:33,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 23:30:33,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:30:33,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:30:33,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:33,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:33,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:30:33,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 23:30:33,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:30:33,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:33,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:33,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:33,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:33,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:33,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:33,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:33,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:33,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:33,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:33,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:33,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:33,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1441 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 865 trivial. 0 not checked. [2020-10-13 23:30:33,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485123577] [2020-10-13 23:30:33,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:33,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:30:33,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960209231] [2020-10-13 23:30:33,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:30:33,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:33,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:30:33,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:30:33,520 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand 28 states. [2020-10-13 23:30:33,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:33,812 INFO L93 Difference]: Finished difference Result 219 states and 225 transitions. [2020-10-13 23:30:33,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:30:33,813 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 147 [2020-10-13 23:30:33,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:33,814 INFO L225 Difference]: With dead ends: 219 [2020-10-13 23:30:33,814 INFO L226 Difference]: Without dead ends: 158 [2020-10-13 23:30:33,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:30:33,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-13 23:30:33,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2020-10-13 23:30:33,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-13 23:30:33,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 159 transitions. [2020-10-13 23:30:33,822 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 159 transitions. Word has length 147 [2020-10-13 23:30:33,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:33,823 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 159 transitions. [2020-10-13 23:30:33,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:30:33,824 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 159 transitions. [2020-10-13 23:30:33,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 23:30:33,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:33,825 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:33,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 23:30:33,825 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:33,825 INFO L82 PathProgramCache]: Analyzing trace with hash -117031500, now seen corresponding path program 41 times [2020-10-13 23:30:33,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:33,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778249481] [2020-10-13 23:30:33,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:33,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:33,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:38,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:38,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-13 23:30:38,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:30:39,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5158 [2020-10-13 23:30:39,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:39,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:39,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:30:39,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:30:39,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:30:39,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:39,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:39,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:39,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:39,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:39,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:39,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:39,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:39,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:39,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:39,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:39,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:39,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1539 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2020-10-13 23:30:39,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778249481] [2020-10-13 23:30:39,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:39,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:30:39,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079757553] [2020-10-13 23:30:39,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:30:39,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:39,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:30:39,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:30:39,204 INFO L87 Difference]: Start difference. First operand 156 states and 159 transitions. Second operand 21 states. [2020-10-13 23:30:39,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:39,400 INFO L93 Difference]: Finished difference Result 274 states and 280 transitions. [2020-10-13 23:30:39,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:30:39,401 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 151 [2020-10-13 23:30:39,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:39,402 INFO L225 Difference]: With dead ends: 274 [2020-10-13 23:30:39,402 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 23:30:39,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:30:39,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 23:30:39,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2020-10-13 23:30:39,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-13 23:30:39,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 161 transitions. [2020-10-13 23:30:39,412 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 161 transitions. Word has length 151 [2020-10-13 23:30:39,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:39,412 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 161 transitions. [2020-10-13 23:30:39,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:30:39,413 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 161 transitions. [2020-10-13 23:30:39,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-13 23:30:39,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:39,414 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:39,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 23:30:39,415 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:39,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:39,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1575733842, now seen corresponding path program 42 times [2020-10-13 23:30:39,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:39,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014963163] [2020-10-13 23:30:39,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:39,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:39,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:44,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:44,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-13 23:30:44,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:30:44,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5083 [2020-10-13 23:30:44,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:44,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:44,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:30:44,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:30:44,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 23:30:44,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:44,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:44,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:44,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:44,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:44,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:44,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:44,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:44,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:44,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:44,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:44,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:44,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 949 trivial. 0 not checked. [2020-10-13 23:30:44,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014963163] [2020-10-13 23:30:44,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:44,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:30:44,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221754386] [2020-10-13 23:30:44,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:30:44,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:44,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:30:44,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:30:44,924 INFO L87 Difference]: Start difference. First operand 158 states and 161 transitions. Second operand 29 states. [2020-10-13 23:30:45,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:45,201 INFO L93 Difference]: Finished difference Result 227 states and 233 transitions. [2020-10-13 23:30:45,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:30:45,201 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 153 [2020-10-13 23:30:45,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:45,203 INFO L225 Difference]: With dead ends: 227 [2020-10-13 23:30:45,203 INFO L226 Difference]: Without dead ends: 164 [2020-10-13 23:30:45,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:30:45,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-13 23:30:45,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2020-10-13 23:30:45,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-13 23:30:45,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 165 transitions. [2020-10-13 23:30:45,210 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 165 transitions. Word has length 153 [2020-10-13 23:30:45,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:45,210 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 165 transitions. [2020-10-13 23:30:45,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:30:45,211 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 165 transitions. [2020-10-13 23:30:45,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-13 23:30:45,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:45,212 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:45,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 23:30:45,212 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:45,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:45,213 INFO L82 PathProgramCache]: Analyzing trace with hash -74193842, now seen corresponding path program 43 times [2020-10-13 23:30:45,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:45,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940137914] [2020-10-13 23:30:45,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:45,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:45,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:50,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:50,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-13 23:30:50,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:30:50,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5309 [2020-10-13 23:30:50,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:50,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:50,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:30:50,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:30:50,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 23:30:50,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:50,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:50,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:50,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:50,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:50,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:50,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:50,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:50,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:50,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:50,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:50,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:50,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2020-10-13 23:30:50,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940137914] [2020-10-13 23:30:50,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:50,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:30:50,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651254259] [2020-10-13 23:30:50,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:30:50,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:50,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:30:50,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:30:50,973 INFO L87 Difference]: Start difference. First operand 162 states and 165 transitions. Second operand 30 states. [2020-10-13 23:30:51,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:51,315 INFO L93 Difference]: Finished difference Result 233 states and 239 transitions. [2020-10-13 23:30:51,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:30:51,316 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 157 [2020-10-13 23:30:51,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:51,317 INFO L225 Difference]: With dead ends: 233 [2020-10-13 23:30:51,317 INFO L226 Difference]: Without dead ends: 168 [2020-10-13 23:30:51,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:30:51,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-13 23:30:51,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2020-10-13 23:30:51,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-13 23:30:51,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 169 transitions. [2020-10-13 23:30:51,324 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 169 transitions. Word has length 157 [2020-10-13 23:30:51,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:51,325 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 169 transitions. [2020-10-13 23:30:51,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:30:51,325 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 169 transitions. [2020-10-13 23:30:51,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-13 23:30:51,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:51,326 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:51,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 23:30:51,326 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:51,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:51,327 INFO L82 PathProgramCache]: Analyzing trace with hash -548171702, now seen corresponding path program 44 times [2020-10-13 23:30:51,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:51,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747991186] [2020-10-13 23:30:51,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:51,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:51,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:56,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:56,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-13 23:30:56,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:30:56,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-13 23:30:56,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:56,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:56,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:30:56,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:30:56,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:30:56,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:56,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:56,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:56,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:56,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:56,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:56,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:56,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:56,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:56,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:56,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:56,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:56,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:56,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2020-10-13 23:30:56,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747991186] [2020-10-13 23:30:56,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:56,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:30:56,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782611596] [2020-10-13 23:30:56,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:30:56,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:56,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:30:56,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:30:56,638 INFO L87 Difference]: Start difference. First operand 166 states and 169 transitions. Second operand 22 states. [2020-10-13 23:30:56,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:56,750 INFO L93 Difference]: Finished difference Result 292 states and 298 transitions. [2020-10-13 23:30:56,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:30:56,751 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 161 [2020-10-13 23:30:56,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:56,752 INFO L225 Difference]: With dead ends: 292 [2020-10-13 23:30:56,753 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 23:30:56,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:30:56,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 23:30:56,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2020-10-13 23:30:56,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-13 23:30:56,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 171 transitions. [2020-10-13 23:30:56,759 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 171 transitions. Word has length 161 [2020-10-13 23:30:56,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:56,759 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 171 transitions. [2020-10-13 23:30:56,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:30:56,759 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 171 transitions. [2020-10-13 23:30:56,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-13 23:30:56,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:56,760 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:56,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 23:30:56,761 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:56,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:56,761 INFO L82 PathProgramCache]: Analyzing trace with hash 551579496, now seen corresponding path program 45 times [2020-10-13 23:30:56,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:56,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164507133] [2020-10-13 23:30:56,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:56,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:56,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:01,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:01,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-13 23:31:01,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:31:01,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5135 [2020-10-13 23:31:01,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:01,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:01,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:31:01,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 23:31:01,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 23:31:01,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:02,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:02,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:02,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:02,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:02,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:02,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:02,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:02,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:02,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:02,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:02,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:02,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:02,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1819 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1090 trivial. 0 not checked. [2020-10-13 23:31:02,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164507133] [2020-10-13 23:31:02,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:02,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:31:02,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169573092] [2020-10-13 23:31:02,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:31:02,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:02,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:31:02,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:31:02,373 INFO L87 Difference]: Start difference. First operand 168 states and 171 transitions. Second operand 31 states. [2020-10-13 23:31:02,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:02,693 INFO L93 Difference]: Finished difference Result 241 states and 247 transitions. [2020-10-13 23:31:02,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:31:02,694 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 163 [2020-10-13 23:31:02,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:02,696 INFO L225 Difference]: With dead ends: 241 [2020-10-13 23:31:02,696 INFO L226 Difference]: Without dead ends: 174 [2020-10-13 23:31:02,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:31:02,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-13 23:31:02,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2020-10-13 23:31:02,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-13 23:31:02,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 175 transitions. [2020-10-13 23:31:02,703 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 175 transitions. Word has length 163 [2020-10-13 23:31:02,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:02,703 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 175 transitions. [2020-10-13 23:31:02,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:31:02,703 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 175 transitions. [2020-10-13 23:31:02,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-13 23:31:02,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:02,705 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:02,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 23:31:02,706 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:02,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:02,706 INFO L82 PathProgramCache]: Analyzing trace with hash -884871580, now seen corresponding path program 46 times [2020-10-13 23:31:02,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:02,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799775905] [2020-10-13 23:31:02,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:02,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:02,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:07,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:07,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-13 23:31:07,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:31:07,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 23:31:07,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:07,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:07,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:31:07,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:07,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:31:07,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:07,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:07,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:07,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:07,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:07,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:07,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:07,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:07,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:07,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:07,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:07,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:07,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1929 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2020-10-13 23:31:08,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799775905] [2020-10-13 23:31:08,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:08,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:31:08,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062393156] [2020-10-13 23:31:08,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:31:08,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:08,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:31:08,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:31:08,018 INFO L87 Difference]: Start difference. First operand 172 states and 175 transitions. Second operand 23 states. [2020-10-13 23:31:08,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:08,184 INFO L93 Difference]: Finished difference Result 302 states and 308 transitions. [2020-10-13 23:31:08,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:31:08,184 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 167 [2020-10-13 23:31:08,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:08,186 INFO L225 Difference]: With dead ends: 302 [2020-10-13 23:31:08,186 INFO L226 Difference]: Without dead ends: 175 [2020-10-13 23:31:08,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:31:08,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-13 23:31:08,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2020-10-13 23:31:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-13 23:31:08,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 177 transitions. [2020-10-13 23:31:08,191 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 177 transitions. Word has length 167 [2020-10-13 23:31:08,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:08,192 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 177 transitions. [2020-10-13 23:31:08,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:31:08,192 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 177 transitions. [2020-10-13 23:31:08,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-13 23:31:08,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:08,193 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:08,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 23:31:08,193 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:08,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:08,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1952874242, now seen corresponding path program 47 times [2020-10-13 23:31:08,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:08,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555681591] [2020-10-13 23:31:08,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:08,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:08,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:13,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:13,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-13 23:31:13,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:31:13,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:31:13,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:13,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:13,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 23:31:13,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 23:31:13,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 23:31:13,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:13,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:13,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:13,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:13,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:13,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:13,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:13,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:13,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:13,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:13,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:13,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:13,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1968 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1184 trivial. 0 not checked. [2020-10-13 23:31:13,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555681591] [2020-10-13 23:31:13,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:13,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 23:31:13,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926775906] [2020-10-13 23:31:13,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 23:31:13,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:13,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 23:31:13,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:31:13,699 INFO L87 Difference]: Start difference. First operand 174 states and 177 transitions. Second operand 32 states. [2020-10-13 23:31:14,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:14,050 INFO L93 Difference]: Finished difference Result 249 states and 255 transitions. [2020-10-13 23:31:14,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:31:14,050 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 169 [2020-10-13 23:31:14,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:14,052 INFO L225 Difference]: With dead ends: 249 [2020-10-13 23:31:14,053 INFO L226 Difference]: Without dead ends: 180 [2020-10-13 23:31:14,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:31:14,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-13 23:31:14,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2020-10-13 23:31:14,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-13 23:31:14,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 181 transitions. [2020-10-13 23:31:14,058 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 181 transitions. Word has length 169 [2020-10-13 23:31:14,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:14,059 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 181 transitions. [2020-10-13 23:31:14,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 23:31:14,059 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 181 transitions. [2020-10-13 23:31:14,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-13 23:31:14,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:14,060 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:14,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 23:31:14,060 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:14,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:14,061 INFO L82 PathProgramCache]: Analyzing trace with hash 328700158, now seen corresponding path program 48 times [2020-10-13 23:31:14,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:14,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276252807] [2020-10-13 23:31:14,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:14,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:14,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking...