/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:42:01,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:42:01,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:42:01,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:42:01,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:42:01,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:42:01,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:42:01,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:42:01,566 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:42:01,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:42:01,567 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:42:01,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:42:01,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:42:01,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:42:01,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:42:01,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:42:01,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:42:01,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:42:01,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:42:01,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:42:01,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:42:01,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:42:01,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:42:01,587 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:42:01,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:42:01,592 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:42:01,593 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:42:01,595 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:42:01,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:42:01,598 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:42:01,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:42:01,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:42:01,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:42:01,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:42:01,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:42:01,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:42:01,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:42:01,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:42:01,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:42:01,612 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:42:01,613 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:42:01,614 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 04:42:01,656 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:42:01,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:42:01,657 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:42:01,658 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:42:01,658 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:42:01,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:42:01,658 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:42:01,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:42:01,659 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:42:01,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:42:01,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:42:01,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:42:01,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:42:01,659 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:42:01,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:42:01,660 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:42:01,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:42:01,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:42:01,662 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:42:01,662 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:42:01,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:42:01,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:42:01,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:42:01,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:42:01,663 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:42:01,663 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:42:01,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:42:01,664 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:42:01,664 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:42:01,664 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 04:42:01,976 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:42:01,988 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:42:01,992 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:42:01,993 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:42:01,994 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:42:01,994 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2020-10-13 04:42:02,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56edc2045/c5115eb943f440019e6d028480bd7897/FLAG6ea761de6 [2020-10-13 04:42:02,484 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:42:02,485 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2020-10-13 04:42:02,491 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56edc2045/c5115eb943f440019e6d028480bd7897/FLAG6ea761de6 [2020-10-13 04:42:02,878 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56edc2045/c5115eb943f440019e6d028480bd7897 [2020-10-13 04:42:02,887 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:42:02,889 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:42:02,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:42:02,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:42:02,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:42:02,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:42:02" (1/1) ... [2020-10-13 04:42:02,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f284b94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:02, skipping insertion in model container [2020-10-13 04:42:02,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:42:02" (1/1) ... [2020-10-13 04:42:02,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:42:02,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:42:03,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:42:03,141 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:42:03,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:42:03,183 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:42:03,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:03 WrapperNode [2020-10-13 04:42:03,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:42:03,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:42:03,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:42:03,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:42:03,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:03" (1/1) ... [2020-10-13 04:42:03,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:03" (1/1) ... [2020-10-13 04:42:03,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:03" (1/1) ... [2020-10-13 04:42:03,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:03" (1/1) ... [2020-10-13 04:42:03,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:03" (1/1) ... [2020-10-13 04:42:03,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:03" (1/1) ... [2020-10-13 04:42:03,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:03" (1/1) ... [2020-10-13 04:42:03,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:42:03,307 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:42:03,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:42:03,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:42:03,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:03" (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 04:42:03,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:42:03,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:42:03,364 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:42:03,364 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:42:03,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:42:03,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:42:03,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:42:03,365 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:42:03,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:42:03,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:42:03,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:42:03,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:42:03,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:42:03,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:42:03,663 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:42:03,663 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-13 04:42:03,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:42:03 BoogieIcfgContainer [2020-10-13 04:42:03,669 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:42:03,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:42:03,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:42:03,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:42:03,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:42:02" (1/3) ... [2020-10-13 04:42:03,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7621215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:42:03, skipping insertion in model container [2020-10-13 04:42:03,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:03" (2/3) ... [2020-10-13 04:42:03,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7621215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:42:03, skipping insertion in model container [2020-10-13 04:42:03,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:42:03" (3/3) ... [2020-10-13 04:42:03,677 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-1.i [2020-10-13 04:42:03,690 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:42:03,702 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:42:03,738 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:42:03,777 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:42:03,777 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:42:03,777 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:42:03,777 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:42:03,778 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:42:03,778 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:42:03,778 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:42:03,778 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:42:03,798 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-10-13 04:42:03,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 04:42:03,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:03,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:03,806 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:03,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:03,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1156372912, now seen corresponding path program 1 times [2020-10-13 04:42:03,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:03,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348492489] [2020-10-13 04:42:03,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:03,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:03,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:04,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:04,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 04:42:04,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:04,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-13 04:42:04,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:04,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:04,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:42:04,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:04,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:42:04,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:04,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:04,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:04,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:04,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:04,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 04:42:04,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:04,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:04,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:04,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:04,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:42:04,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348492489] [2020-10-13 04:42:04,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:42:04,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:42:04,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901509275] [2020-10-13 04:42:04,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:42:04,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:04,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:42:04,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:42:04,156 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2020-10-13 04:42:04,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:04,342 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2020-10-13 04:42:04,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:42:04,344 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-13 04:42:04,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:04,355 INFO L225 Difference]: With dead ends: 82 [2020-10-13 04:42:04,355 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 04:42:04,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:42:04,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 04:42:04,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-13 04:42:04,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 04:42:04,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-10-13 04:42:04,406 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 16 [2020-10-13 04:42:04,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:04,406 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-10-13 04:42:04,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:42:04,407 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-10-13 04:42:04,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 04:42:04,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:04,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:04,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:42:04,409 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:04,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:04,410 INFO L82 PathProgramCache]: Analyzing trace with hash -2078459264, now seen corresponding path program 1 times [2020-10-13 04:42:04,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:04,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582551784] [2020-10-13 04:42:04,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:04,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:04,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:04,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:04,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 04:42:04,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:04,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-13 04:42:04,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:04,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:42:04,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:04,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:42:04,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:04,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:04,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:04,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:04,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:04,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:04,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:42:04,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:04,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:04,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:04,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:04,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:42:04,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582551784] [2020-10-13 04:42:04,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:42:04,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:42:04,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287793584] [2020-10-13 04:42:04,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:42:04,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:04,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:42:04,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:04,713 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 4 states. [2020-10-13 04:42:04,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:04,831 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2020-10-13 04:42:04,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:42:04,832 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 04:42:04,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:04,846 INFO L225 Difference]: With dead ends: 74 [2020-10-13 04:42:04,848 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 04:42:04,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:04,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 04:42:04,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-13 04:42:04,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 04:42:04,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2020-10-13 04:42:04,860 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 16 [2020-10-13 04:42:04,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:04,860 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2020-10-13 04:42:04,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:42:04,861 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2020-10-13 04:42:04,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 04:42:04,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:04,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:04,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:42:04,862 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:04,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:04,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1609541534, now seen corresponding path program 1 times [2020-10-13 04:42:04,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:04,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373544176] [2020-10-13 04:42:04,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:04,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:04,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:05,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 04:42:05,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:05,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-13 04:42:05,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:05,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:42:05,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 04:42:05,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:42:05,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:05,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:05,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:05,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:05,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:05,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:42:05,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:05,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:05,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:05,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:05,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:42:05,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373544176] [2020-10-13 04:42:05,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:42:05,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:42:05,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405432305] [2020-10-13 04:42:05,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:42:05,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:05,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:42:05,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:05,131 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand 4 states. [2020-10-13 04:42:05,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:05,285 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2020-10-13 04:42:05,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:42:05,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-13 04:42:05,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:05,287 INFO L225 Difference]: With dead ends: 72 [2020-10-13 04:42:05,287 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 04:42:05,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:05,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 04:42:05,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-10-13 04:42:05,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 04:42:05,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-10-13 04:42:05,299 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 18 [2020-10-13 04:42:05,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:05,299 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-10-13 04:42:05,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:42:05,299 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-10-13 04:42:05,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 04:42:05,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:05,301 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] [2020-10-13 04:42:05,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:42:05,301 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:05,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:05,302 INFO L82 PathProgramCache]: Analyzing trace with hash -898844059, now seen corresponding path program 1 times [2020-10-13 04:42:05,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:05,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775745075] [2020-10-13 04:42:05,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:05,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:05,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 04:42:05,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:42:05,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 510 [2020-10-13 04:42:05,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:05,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:42:05,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 04:42:05,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 04:42:05,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:05,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:05,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:05,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:05,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:05,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:05,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:05,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:05,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:05,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:05,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:05,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:42:05,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775745075] [2020-10-13 04:42:05,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:42:05,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:42:05,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292650654] [2020-10-13 04:42:05,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:42:05,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:05,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:42:05,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:05,866 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 4 states. [2020-10-13 04:42:05,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:05,994 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2020-10-13 04:42:05,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:42:05,995 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-13 04:42:05,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:05,996 INFO L225 Difference]: With dead ends: 90 [2020-10-13 04:42:05,996 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 04:42:05,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:05,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 04:42:06,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2020-10-13 04:42:06,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 04:42:06,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2020-10-13 04:42:06,006 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 20 [2020-10-13 04:42:06,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:06,006 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2020-10-13 04:42:06,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:42:06,007 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2020-10-13 04:42:06,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 04:42:06,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:06,008 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] [2020-10-13 04:42:06,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:42:06,021 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:06,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:06,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1708190685, now seen corresponding path program 1 times [2020-10-13 04:42:06,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:06,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18238833] [2020-10-13 04:42:06,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:06,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:06,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:06,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:06,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:06,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 04:42:06,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:06,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-13 04:42:06,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:06,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:42:06,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 04:42:06,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 04:42:06,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:06,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:06,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:06,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:06,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:06,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:06,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:06,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:06,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:06,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:06,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:06,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:06,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:42:06,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18238833] [2020-10-13 04:42:06,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:42:06,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 04:42:06,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555106983] [2020-10-13 04:42:06,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:42:06,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:06,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:42:06,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:42:06,272 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 5 states. [2020-10-13 04:42:06,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:06,414 INFO L93 Difference]: Finished difference Result 106 states and 143 transitions. [2020-10-13 04:42:06,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:42:06,415 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 04:42:06,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:06,416 INFO L225 Difference]: With dead ends: 106 [2020-10-13 04:42:06,416 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 04:42:06,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:42:06,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 04:42:06,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 47. [2020-10-13 04:42:06,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 04:42:06,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2020-10-13 04:42:06,425 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 20 [2020-10-13 04:42:06,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:06,425 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2020-10-13 04:42:06,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:42:06,425 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2020-10-13 04:42:06,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 04:42:06,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:06,426 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 04:42:06,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:42:06,427 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:06,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:06,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1561235658, now seen corresponding path program 1 times [2020-10-13 04:42:06,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:06,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153994494] [2020-10-13 04:42:06,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:06,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:06,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:06,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:06,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:06,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 04:42:06,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:06,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-10-13 04:42:06,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:06,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:42:06,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:06,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:42:06,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:06,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:06,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:06,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:06,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:06,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:06,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:06,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:06,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:06,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:06,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:06,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:42:06,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153994494] [2020-10-13 04:42:06,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:06,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:42:06,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302384953] [2020-10-13 04:42:06,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:42:06,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:06,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:42:06,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:42:06,843 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand 5 states. [2020-10-13 04:42:06,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:06,944 INFO L93 Difference]: Finished difference Result 88 states and 114 transitions. [2020-10-13 04:42:06,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:42:06,945 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-13 04:42:06,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:06,946 INFO L225 Difference]: With dead ends: 88 [2020-10-13 04:42:06,946 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 04:42:06,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:42:06,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 04:42:06,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-13 04:42:06,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 04:42:06,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2020-10-13 04:42:06,954 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 23 [2020-10-13 04:42:06,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:06,954 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2020-10-13 04:42:06,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:42:06,954 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2020-10-13 04:42:06,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 04:42:06,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:06,955 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:06,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:42:06,956 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:06,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:06,956 INFO L82 PathProgramCache]: Analyzing trace with hash -159559916, now seen corresponding path program 2 times [2020-10-13 04:42:06,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:06,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326472590] [2020-10-13 04:42:06,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:06,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:06,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:07,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:07,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:07,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 04:42:07,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:07,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 411 [2020-10-13 04:42:07,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:07,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:42:07,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 04:42:07,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:42:07,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:07,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:07,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:07,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:07,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:07,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:07,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:07,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:07,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:07,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:07,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:07,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:07,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:42:07,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326472590] [2020-10-13 04:42:07,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:07,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:42:07,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965758318] [2020-10-13 04:42:07,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:42:07,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:07,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:42:07,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:42:07,427 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 6 states. [2020-10-13 04:42:07,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:07,603 INFO L93 Difference]: Finished difference Result 114 states and 154 transitions. [2020-10-13 04:42:07,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:42:07,603 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-13 04:42:07,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:07,604 INFO L225 Difference]: With dead ends: 114 [2020-10-13 04:42:07,604 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 04:42:07,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:42:07,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 04:42:07,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 54. [2020-10-13 04:42:07,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 04:42:07,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2020-10-13 04:42:07,613 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 25 [2020-10-13 04:42:07,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:07,613 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2020-10-13 04:42:07,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:42:07,613 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2020-10-13 04:42:07,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 04:42:07,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:07,615 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:07,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:42:07,615 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:07,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:07,615 INFO L82 PathProgramCache]: Analyzing trace with hash -2139625433, now seen corresponding path program 3 times [2020-10-13 04:42:07,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:07,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502618587] [2020-10-13 04:42:07,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:07,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:07,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:07,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:08,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:08,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 04:42:08,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:08,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 920 [2020-10-13 04:42:08,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:08,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:42:08,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:08,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:42:08,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:08,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:08,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:08,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:08,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:08,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:08,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:08,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:08,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:08,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:08,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:08,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:08,595 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 04:42:08,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502618587] [2020-10-13 04:42:08,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:08,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:42:08,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146420088] [2020-10-13 04:42:08,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:42:08,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:08,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:42:08,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:42:08,598 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 6 states. [2020-10-13 04:42:08,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:08,703 INFO L93 Difference]: Finished difference Result 100 states and 128 transitions. [2020-10-13 04:42:08,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:42:08,704 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-13 04:42:08,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:08,705 INFO L225 Difference]: With dead ends: 100 [2020-10-13 04:42:08,705 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 04:42:08,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:42:08,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 04:42:08,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-13 04:42:08,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 04:42:08,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-10-13 04:42:08,712 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2020-10-13 04:42:08,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:08,712 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-10-13 04:42:08,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:42:08,713 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-10-13 04:42:08,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 04:42:08,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:08,714 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:08,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:42:08,714 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:08,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:08,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1353497847, now seen corresponding path program 4 times [2020-10-13 04:42:08,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:08,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315269597] [2020-10-13 04:42:08,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:08,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:08,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:08,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:09,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:09,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 04:42:09,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:09,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 971 [2020-10-13 04:42:09,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:09,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:42:09,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:09,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:42:09,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:09,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:09,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:09,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:09,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:09,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:09,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:09,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:09,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:09,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:09,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:09,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 04:42:09,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315269597] [2020-10-13 04:42:09,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:09,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:42:09,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097755381] [2020-10-13 04:42:09,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:42:09,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:09,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:42:09,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:42:09,746 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 7 states. [2020-10-13 04:42:09,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:09,854 INFO L93 Difference]: Finished difference Result 102 states and 130 transitions. [2020-10-13 04:42:09,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:42:09,855 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-13 04:42:09,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:09,856 INFO L225 Difference]: With dead ends: 102 [2020-10-13 04:42:09,856 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 04:42:09,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:42:09,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 04:42:09,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-13 04:42:09,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 04:42:09,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-10-13 04:42:09,864 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 30 [2020-10-13 04:42:09,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:09,864 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-10-13 04:42:09,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:42:09,865 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-10-13 04:42:09,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 04:42:09,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:09,866 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:09,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:42:09,866 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:09,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:09,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1799131797, now seen corresponding path program 5 times [2020-10-13 04:42:09,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:09,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643571144] [2020-10-13 04:42:09,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:09,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:09,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:09,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:11,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:11,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 04:42:11,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:11,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1863 [2020-10-13 04:42:11,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:11,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:42:11,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 04:42:11,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 04:42:11,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:11,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:11,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:11,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:11,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:11,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:11,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:42:11,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:11,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:11,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:11,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:11,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 04:42:11,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643571144] [2020-10-13 04:42:11,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:11,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:42:11,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330693205] [2020-10-13 04:42:11,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:42:11,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:11,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:42:11,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:42:11,802 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 7 states. [2020-10-13 04:42:11,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:11,984 INFO L93 Difference]: Finished difference Result 124 states and 166 transitions. [2020-10-13 04:42:11,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:42:11,984 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-13 04:42:11,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:11,985 INFO L225 Difference]: With dead ends: 124 [2020-10-13 04:42:11,986 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 04:42:11,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:42:11,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 04:42:12,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2020-10-13 04:42:12,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 04:42:12,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-10-13 04:42:12,001 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 32 [2020-10-13 04:42:12,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:12,002 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-10-13 04:42:12,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:42:12,002 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-10-13 04:42:12,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 04:42:12,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:12,003 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:12,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:42:12,004 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:12,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:12,004 INFO L82 PathProgramCache]: Analyzing trace with hash 37525104, now seen corresponding path program 6 times [2020-10-13 04:42:12,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:12,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405459271] [2020-10-13 04:42:12,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:12,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:12,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:12,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:13,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:13,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 04:42:13,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:13,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1783 [2020-10-13 04:42:13,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:13,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:42:13,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:13,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:42:13,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:13,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:13,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:13,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:13,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:13,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:13,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:13,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:13,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:13,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:13,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:13,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:42:13,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405459271] [2020-10-13 04:42:13,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:13,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:42:13,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256333607] [2020-10-13 04:42:13,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:42:13,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:13,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:42:13,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:42:13,870 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 8 states. [2020-10-13 04:42:13,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:13,976 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2020-10-13 04:42:13,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:42:13,977 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-13 04:42:13,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:13,978 INFO L225 Difference]: With dead ends: 116 [2020-10-13 04:42:13,978 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 04:42:13,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:42:13,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 04:42:13,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-13 04:42:13,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 04:42:13,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-10-13 04:42:13,990 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 35 [2020-10-13 04:42:13,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:13,991 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-10-13 04:42:13,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:42:13,993 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-10-13 04:42:13,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 04:42:13,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:13,994 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:13,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:42:13,994 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:13,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:13,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1435605326, now seen corresponding path program 7 times [2020-10-13 04:42:13,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:13,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748326617] [2020-10-13 04:42:13,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:14,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:14,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:14,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:16,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:16,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 04:42:16,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:16,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2237 [2020-10-13 04:42:16,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:16,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:42:16,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:16,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:42:16,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:16,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:16,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:16,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:16,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:16,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:16,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:16,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:16,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:16,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:16,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:16,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:42:16,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748326617] [2020-10-13 04:42:16,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:16,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:42:16,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122445370] [2020-10-13 04:42:16,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:42:16,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:16,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:42:16,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:42:16,342 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 9 states. [2020-10-13 04:42:16,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:16,473 INFO L93 Difference]: Finished difference Result 118 states and 150 transitions. [2020-10-13 04:42:16,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:42:16,473 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-13 04:42:16,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:16,474 INFO L225 Difference]: With dead ends: 118 [2020-10-13 04:42:16,474 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 04:42:16,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:42:16,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 04:42:16,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-13 04:42:16,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 04:42:16,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2020-10-13 04:42:16,486 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 37 [2020-10-13 04:42:16,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:16,487 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2020-10-13 04:42:16,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:42:16,487 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2020-10-13 04:42:16,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 04:42:16,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:16,489 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:16,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:42:16,489 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:16,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:16,490 INFO L82 PathProgramCache]: Analyzing trace with hash 665935020, now seen corresponding path program 8 times [2020-10-13 04:42:16,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:16,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792216288] [2020-10-13 04:42:16,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:16,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:16,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:16,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:18,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:18,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 04:42:18,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:18,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2317 [2020-10-13 04:42:18,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:18,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:42:18,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 04:42:18,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:42:18,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:18,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:18,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:18,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:18,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:18,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:18,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:18,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:18,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:18,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:18,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:18,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:18,886 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 04:42:18,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792216288] [2020-10-13 04:42:18,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:18,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:42:18,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544032988] [2020-10-13 04:42:18,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:42:18,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:18,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:42:18,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:42:18,888 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand 8 states. [2020-10-13 04:42:19,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:19,089 INFO L93 Difference]: Finished difference Result 134 states and 178 transitions. [2020-10-13 04:42:19,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:42:19,089 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-13 04:42:19,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:19,091 INFO L225 Difference]: With dead ends: 134 [2020-10-13 04:42:19,091 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 04:42:19,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:42:19,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 04:42:19,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 74. [2020-10-13 04:42:19,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 04:42:19,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2020-10-13 04:42:19,096 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 39 [2020-10-13 04:42:19,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:19,097 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2020-10-13 04:42:19,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:42:19,097 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2020-10-13 04:42:19,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 04:42:19,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:19,097 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:19,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:42:19,098 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:19,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:19,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1492243343, now seen corresponding path program 9 times [2020-10-13 04:42:19,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:19,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628701072] [2020-10-13 04:42:19,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:19,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:19,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:19,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:21,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:21,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 04:42:21,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:21,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2416 [2020-10-13 04:42:21,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:21,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:42:21,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:21,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:42:21,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:21,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:21,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:21,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:21,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:21,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:21,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:21,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:21,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:21,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:21,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:21,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 04:42:21,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628701072] [2020-10-13 04:42:21,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:21,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:42:21,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102752017] [2020-10-13 04:42:21,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:42:21,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:21,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:42:21,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:42:21,614 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand 10 states. [2020-10-13 04:42:21,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:21,752 INFO L93 Difference]: Finished difference Result 132 states and 168 transitions. [2020-10-13 04:42:21,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:42:21,753 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-13 04:42:21,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:21,754 INFO L225 Difference]: With dead ends: 132 [2020-10-13 04:42:21,754 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 04:42:21,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:42:21,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 04:42:21,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-13 04:42:21,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 04:42:21,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2020-10-13 04:42:21,761 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 42 [2020-10-13 04:42:21,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:21,761 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2020-10-13 04:42:21,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:42:21,761 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2020-10-13 04:42:21,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 04:42:21,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:21,763 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:21,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:42:21,763 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:21,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:21,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1671133937, now seen corresponding path program 10 times [2020-10-13 04:42:21,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:21,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97165297] [2020-10-13 04:42:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:21,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:21,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:21,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:24,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:24,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 04:42:24,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:24,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2571 [2020-10-13 04:42:24,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:24,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:42:24,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 04:42:24,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 04:42:24,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:24,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:24,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:24,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:24,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:24,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:24,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:24,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:24,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:24,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:24,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:24,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 04:42:24,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97165297] [2020-10-13 04:42:24,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:24,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:42:24,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848030502] [2020-10-13 04:42:24,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:42:24,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:24,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:42:24,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:42:24,408 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand 9 states. [2020-10-13 04:42:24,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:24,629 INFO L93 Difference]: Finished difference Result 142 states and 188 transitions. [2020-10-13 04:42:24,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:42:24,629 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-10-13 04:42:24,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:24,631 INFO L225 Difference]: With dead ends: 142 [2020-10-13 04:42:24,631 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 04:42:24,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:42:24,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 04:42:24,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 82. [2020-10-13 04:42:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 04:42:24,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 102 transitions. [2020-10-13 04:42:24,641 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 102 transitions. Word has length 44 [2020-10-13 04:42:24,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:24,641 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 102 transitions. [2020-10-13 04:42:24,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:42:24,642 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 102 transitions. [2020-10-13 04:42:24,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 04:42:24,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:24,642 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:24,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:42:24,643 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:24,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:24,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1433775318, now seen corresponding path program 11 times [2020-10-13 04:42:24,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:24,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040266234] [2020-10-13 04:42:24,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:24,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:24,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:24,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:27,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:27,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 04:42:27,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:27,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3027 [2020-10-13 04:42:27,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:27,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:42:27,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:27,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:42:27,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:27,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:27,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:27,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:27,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:27,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:27,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:27,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:27,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:27,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:27,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:27,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-13 04:42:27,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040266234] [2020-10-13 04:42:27,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:27,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:42:27,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759265453] [2020-10-13 04:42:27,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:42:27,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:27,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:42:27,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:42:27,773 INFO L87 Difference]: Start difference. First operand 82 states and 102 transitions. Second operand 11 states. [2020-10-13 04:42:27,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:27,906 INFO L93 Difference]: Finished difference Result 146 states and 186 transitions. [2020-10-13 04:42:27,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:42:27,907 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-13 04:42:27,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:27,908 INFO L225 Difference]: With dead ends: 146 [2020-10-13 04:42:27,908 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 04:42:27,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:42:27,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 04:42:27,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-13 04:42:27,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 04:42:27,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2020-10-13 04:42:27,916 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 47 [2020-10-13 04:42:27,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:27,916 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2020-10-13 04:42:27,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:42:27,916 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2020-10-13 04:42:27,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 04:42:27,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:27,917 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:27,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:42:27,917 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:27,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:27,918 INFO L82 PathProgramCache]: Analyzing trace with hash -2113144568, now seen corresponding path program 12 times [2020-10-13 04:42:27,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:27,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743465662] [2020-10-13 04:42:27,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:27,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:27,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:27,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:28,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:30,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:30,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 04:42:30,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:30,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2691 [2020-10-13 04:42:30,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:30,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:42:30,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 04:42:30,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:42:30,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:30,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:30,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:30,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:30,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:30,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:30,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:30,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:30,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:30,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:30,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:30,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 04:42:30,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743465662] [2020-10-13 04:42:30,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:30,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:42:30,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569937593] [2020-10-13 04:42:30,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:42:30,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:30,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:42:30,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:42:30,697 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand 10 states. [2020-10-13 04:42:30,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:30,955 INFO L93 Difference]: Finished difference Result 150 states and 198 transitions. [2020-10-13 04:42:30,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:42:30,956 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2020-10-13 04:42:30,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:30,957 INFO L225 Difference]: With dead ends: 150 [2020-10-13 04:42:30,957 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 04:42:30,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:42:30,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 04:42:30,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2020-10-13 04:42:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 04:42:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2020-10-13 04:42:30,965 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 49 [2020-10-13 04:42:30,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:30,966 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2020-10-13 04:42:30,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:42:30,966 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2020-10-13 04:42:30,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 04:42:30,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:30,966 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:30,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:42:30,967 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:30,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:30,967 INFO L82 PathProgramCache]: Analyzing trace with hash -278165069, now seen corresponding path program 13 times [2020-10-13 04:42:30,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:30,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050353281] [2020-10-13 04:42:30,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:30,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:30,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:31,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:33,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:33,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 04:42:33,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:33,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2858 [2020-10-13 04:42:33,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:33,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:42:33,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:42:33,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:33,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:33,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:33,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:33,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:33,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:33,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:33,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:33,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:33,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:33,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:33,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 04:42:33,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050353281] [2020-10-13 04:42:33,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:33,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:42:33,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990239706] [2020-10-13 04:42:33,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:42:33,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:33,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:42:33,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:42:33,939 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand 12 states. [2020-10-13 04:42:34,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:34,055 INFO L93 Difference]: Finished difference Result 160 states and 204 transitions. [2020-10-13 04:42:34,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:42:34,055 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-13 04:42:34,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:34,057 INFO L225 Difference]: With dead ends: 160 [2020-10-13 04:42:34,057 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 04:42:34,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:42:34,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 04:42:34,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-13 04:42:34,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 04:42:34,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2020-10-13 04:42:34,063 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 114 transitions. Word has length 52 [2020-10-13 04:42:34,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:34,063 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 114 transitions. [2020-10-13 04:42:34,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:42:34,064 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 114 transitions. [2020-10-13 04:42:34,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 04:42:34,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:34,065 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:34,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:42:34,065 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:34,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:34,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1426268523, now seen corresponding path program 14 times [2020-10-13 04:42:34,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:34,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086770839] [2020-10-13 04:42:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:34,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:34,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:34,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:37,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:37,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 04:42:37,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:37,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3356 [2020-10-13 04:42:37,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:37,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:42:37,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:37,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:42:37,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:37,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:37,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:37,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:37,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:37,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:37,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:37,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:37,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:37,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:37,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:37,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:37,530 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 04:42:37,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086770839] [2020-10-13 04:42:37,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:37,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:42:37,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029571103] [2020-10-13 04:42:37,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:42:37,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:37,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:42:37,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:42:37,532 INFO L87 Difference]: Start difference. First operand 92 states and 114 transitions. Second operand 13 states. [2020-10-13 04:42:37,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:37,667 INFO L93 Difference]: Finished difference Result 162 states and 206 transitions. [2020-10-13 04:42:37,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:42:37,668 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-10-13 04:42:37,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:37,669 INFO L225 Difference]: With dead ends: 162 [2020-10-13 04:42:37,669 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 04:42:37,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:42:37,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 04:42:37,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-13 04:42:37,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 04:42:37,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2020-10-13 04:42:37,675 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 54 [2020-10-13 04:42:37,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:37,676 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2020-10-13 04:42:37,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:42:37,676 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2020-10-13 04:42:37,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 04:42:37,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:37,677 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:37,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:42:37,677 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:37,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:37,678 INFO L82 PathProgramCache]: Analyzing trace with hash -947092745, now seen corresponding path program 15 times [2020-10-13 04:42:37,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:37,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200593719] [2020-10-13 04:42:37,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:37,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:37,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:37,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:41,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:41,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 04:42:41,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:41,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4114 [2020-10-13 04:42:41,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:41,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:42:41,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 04:42:41,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 04:42:41,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:41,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:41,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:41,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:41,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:41,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:41,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:41,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:41,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:41,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:41,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:41,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:41,884 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 04:42:41,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200593719] [2020-10-13 04:42:41,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:41,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:42:41,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261450370] [2020-10-13 04:42:41,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:42:41,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:41,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:42:41,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:42:41,887 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand 11 states. [2020-10-13 04:42:42,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:42,209 INFO L93 Difference]: Finished difference Result 160 states and 210 transitions. [2020-10-13 04:42:42,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:42:42,210 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-13 04:42:42,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:42,212 INFO L225 Difference]: With dead ends: 160 [2020-10-13 04:42:42,212 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 04:42:42,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:42:42,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 04:42:42,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 100. [2020-10-13 04:42:42,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 04:42:42,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2020-10-13 04:42:42,220 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 56 [2020-10-13 04:42:42,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:42,220 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2020-10-13 04:42:42,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:42:42,220 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2020-10-13 04:42:42,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 04:42:42,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:42,221 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:42,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:42:42,222 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:42,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:42,222 INFO L82 PathProgramCache]: Analyzing trace with hash -123796124, now seen corresponding path program 16 times [2020-10-13 04:42:42,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:42,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734270365] [2020-10-13 04:42:42,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:42,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:42,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:42,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:46,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:46,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 04:42:46,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:46,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4734 [2020-10-13 04:42:46,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:46,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:42:46,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:46,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:42:46,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:47,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:47,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:47,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:47,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:47,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:47,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:47,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:47,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:47,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:47,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:47,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 04:42:47,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734270365] [2020-10-13 04:42:47,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:47,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:42:47,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599495334] [2020-10-13 04:42:47,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:42:47,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:47,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:42:47,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:42:47,102 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand 14 states. [2020-10-13 04:42:47,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:47,281 INFO L93 Difference]: Finished difference Result 176 states and 224 transitions. [2020-10-13 04:42:47,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:42:47,282 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-10-13 04:42:47,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:47,283 INFO L225 Difference]: With dead ends: 176 [2020-10-13 04:42:47,284 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 04:42:47,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:42:47,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 04:42:47,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-13 04:42:47,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 04:42:47,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2020-10-13 04:42:47,291 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 59 [2020-10-13 04:42:47,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:47,291 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2020-10-13 04:42:47,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:42:47,292 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2020-10-13 04:42:47,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 04:42:47,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:47,293 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:47,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:42:47,293 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:47,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:47,293 INFO L82 PathProgramCache]: Analyzing trace with hash -546255294, now seen corresponding path program 17 times [2020-10-13 04:42:47,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:47,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869518698] [2020-10-13 04:42:47,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:47,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:47,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:47,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:52,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:52,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 04:42:52,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:52,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:42:52,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:52,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:42:52,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:52,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:42:52,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:52,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:52,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:52,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:52,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:52,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:52,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:42:52,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:52,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:52,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:52,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:52,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 04:42:52,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869518698] [2020-10-13 04:42:52,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:52,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:42:52,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969621528] [2020-10-13 04:42:52,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:42:52,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:52,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:42:52,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:42:52,458 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand 15 states. [2020-10-13 04:42:52,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:52,604 INFO L93 Difference]: Finished difference Result 178 states and 226 transitions. [2020-10-13 04:42:52,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:42:52,607 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-10-13 04:42:52,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:52,608 INFO L225 Difference]: With dead ends: 178 [2020-10-13 04:42:52,608 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 04:42:52,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:42:52,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 04:42:52,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-13 04:42:52,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 04:42:52,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 128 transitions. [2020-10-13 04:42:52,618 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 128 transitions. Word has length 61 [2020-10-13 04:42:52,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:52,619 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 128 transitions. [2020-10-13 04:42:52,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:42:52,619 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 128 transitions. [2020-10-13 04:42:52,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 04:42:52,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:52,620 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:52,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:42:52,623 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:52,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:52,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1492375456, now seen corresponding path program 18 times [2020-10-13 04:42:52,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:52,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923816989] [2020-10-13 04:42:52,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:52,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:52,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:52,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:57,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:57,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 04:42:57,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:57,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:42:57,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:57,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:42:57,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 04:42:57,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:42:57,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:57,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:57,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:57,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:57,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:57,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:57,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:57,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:57,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:57,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:57,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:57,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:57,738 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 04:42:57,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923816989] [2020-10-13 04:42:57,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:57,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:42:57,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954605744] [2020-10-13 04:42:57,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:42:57,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:57,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:42:57,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:42:57,740 INFO L87 Difference]: Start difference. First operand 104 states and 128 transitions. Second operand 12 states. [2020-10-13 04:42:58,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:58,035 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-10-13 04:42:58,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:42:58,035 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-10-13 04:42:58,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:58,037 INFO L225 Difference]: With dead ends: 170 [2020-10-13 04:42:58,037 INFO L226 Difference]: Without dead ends: 135 [2020-10-13 04:42:58,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:42:58,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-13 04:42:58,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 110. [2020-10-13 04:42:58,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 04:42:58,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 136 transitions. [2020-10-13 04:42:58,044 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 136 transitions. Word has length 63 [2020-10-13 04:42:58,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:58,044 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 136 transitions. [2020-10-13 04:42:58,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:42:58,045 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 136 transitions. [2020-10-13 04:42:58,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 04:42:58,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:58,045 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:58,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:42:58,046 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:58,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:58,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1068235749, now seen corresponding path program 19 times [2020-10-13 04:42:58,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:58,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759470591] [2020-10-13 04:42:58,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:58,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:58,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:58,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:03,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:03,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 04:43:03,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:03,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:43:03,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:03,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:43:03,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:03,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:43:03,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:03,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:03,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:03,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:03,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:03,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:03,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:03,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:03,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:03,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:03,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:03,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:03,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:03,211 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-13 04:43:03,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759470591] [2020-10-13 04:43:03,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:03,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:43:03,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647107456] [2020-10-13 04:43:03,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:43:03,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:03,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:43:03,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:43:03,213 INFO L87 Difference]: Start difference. First operand 110 states and 136 transitions. Second operand 16 states. [2020-10-13 04:43:03,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:03,342 INFO L93 Difference]: Finished difference Result 192 states and 244 transitions. [2020-10-13 04:43:03,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:43:03,342 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2020-10-13 04:43:03,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:03,343 INFO L225 Difference]: With dead ends: 192 [2020-10-13 04:43:03,343 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 04:43:03,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:43:03,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 04:43:03,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-13 04:43:03,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 04:43:03,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2020-10-13 04:43:03,350 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 66 [2020-10-13 04:43:03,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:03,350 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2020-10-13 04:43:03,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:43:03,350 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2020-10-13 04:43:03,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 04:43:03,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:03,351 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:03,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:43:03,351 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:03,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:03,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1128913539, now seen corresponding path program 20 times [2020-10-13 04:43:03,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:03,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712215970] [2020-10-13 04:43:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:03,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:03,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:03,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:08,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:08,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 04:43:08,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:08,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:43:08,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:08,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:43:08,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 04:43:08,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 04:43:08,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:08,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:08,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:08,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:08,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:08,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:08,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:43:08,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:08,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:08,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:08,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:08,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-13 04:43:08,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712215970] [2020-10-13 04:43:08,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:08,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:43:08,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109764903] [2020-10-13 04:43:08,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:43:08,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:08,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:43:08,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:43:08,472 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand 13 states. [2020-10-13 04:43:08,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:08,810 INFO L93 Difference]: Finished difference Result 178 states and 232 transitions. [2020-10-13 04:43:08,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:43:08,811 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 68 [2020-10-13 04:43:08,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:08,812 INFO L225 Difference]: With dead ends: 178 [2020-10-13 04:43:08,813 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 04:43:08,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:43:08,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 04:43:08,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 118. [2020-10-13 04:43:08,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 04:43:08,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 146 transitions. [2020-10-13 04:43:08,819 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 146 transitions. Word has length 68 [2020-10-13 04:43:08,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:08,819 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 146 transitions. [2020-10-13 04:43:08,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:43:08,820 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 146 transitions. [2020-10-13 04:43:08,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 04:43:08,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:08,821 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:08,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:43:08,821 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:08,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:08,821 INFO L82 PathProgramCache]: Analyzing trace with hash -793309922, now seen corresponding path program 21 times [2020-10-13 04:43:08,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:08,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913660592] [2020-10-13 04:43:08,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:08,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:08,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:09,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:13,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:13,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 04:43:13,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:13,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:43:13,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:13,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:43:13,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:13,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:43:13,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:13,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:13,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:13,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:13,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:13,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:13,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:13,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:13,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:13,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:13,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:13,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:13,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-13 04:43:14,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913660592] [2020-10-13 04:43:14,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:14,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:43:14,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636839914] [2020-10-13 04:43:14,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:43:14,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:14,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:43:14,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:43:14,003 INFO L87 Difference]: Start difference. First operand 118 states and 146 transitions. Second operand 17 states. [2020-10-13 04:43:14,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:14,171 INFO L93 Difference]: Finished difference Result 206 states and 262 transitions. [2020-10-13 04:43:14,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:43:14,172 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-10-13 04:43:14,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:14,173 INFO L225 Difference]: With dead ends: 206 [2020-10-13 04:43:14,173 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 04:43:14,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:43:14,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 04:43:14,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-13 04:43:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 04:43:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 148 transitions. [2020-10-13 04:43:14,181 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 148 transitions. Word has length 71 [2020-10-13 04:43:14,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:14,181 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 148 transitions. [2020-10-13 04:43:14,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:43:14,181 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 148 transitions. [2020-10-13 04:43:14,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 04:43:14,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:14,182 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:14,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:43:14,182 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:14,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:14,183 INFO L82 PathProgramCache]: Analyzing trace with hash 951875836, now seen corresponding path program 22 times [2020-10-13 04:43:14,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:14,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917844853] [2020-10-13 04:43:14,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:14,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:14,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:17,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:19,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:19,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 04:43:19,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:19,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 04:43:19,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:19,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:43:19,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 04:43:19,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:43:19,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:19,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:19,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:19,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:19,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:19,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:19,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:19,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:19,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:19,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:19,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:19,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-13 04:43:19,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917844853] [2020-10-13 04:43:19,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:19,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:43:19,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061655415] [2020-10-13 04:43:19,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:43:19,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:19,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:43:19,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:43:19,323 INFO L87 Difference]: Start difference. First operand 120 states and 148 transitions. Second operand 14 states. [2020-10-13 04:43:19,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:19,644 INFO L93 Difference]: Finished difference Result 186 states and 242 transitions. [2020-10-13 04:43:19,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:43:19,644 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2020-10-13 04:43:19,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:19,646 INFO L225 Difference]: With dead ends: 186 [2020-10-13 04:43:19,646 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 04:43:19,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:43:19,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 04:43:19,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 126. [2020-10-13 04:43:19,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 04:43:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 156 transitions. [2020-10-13 04:43:19,654 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 156 transitions. Word has length 73 [2020-10-13 04:43:19,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:19,654 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 156 transitions. [2020-10-13 04:43:19,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:43:19,654 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 156 transitions. [2020-10-13 04:43:19,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 04:43:19,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:19,655 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:19,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:43:19,655 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:19,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:19,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1260022465, now seen corresponding path program 23 times [2020-10-13 04:43:19,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:19,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545148260] [2020-10-13 04:43:19,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:19,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:19,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:19,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:24,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:24,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 04:43:24,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:24,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:43:24,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:24,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:43:24,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:24,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:43:24,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:24,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:24,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:24,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:24,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:24,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:24,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:24,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:24,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:24,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:24,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:24,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:24,864 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-13 04:43:24,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545148260] [2020-10-13 04:43:24,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:24,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:43:24,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525601937] [2020-10-13 04:43:24,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:43:24,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:24,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:43:24,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:43:24,867 INFO L87 Difference]: Start difference. First operand 126 states and 156 transitions. Second operand 18 states. [2020-10-13 04:43:25,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:25,035 INFO L93 Difference]: Finished difference Result 220 states and 280 transitions. [2020-10-13 04:43:25,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:43:25,035 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2020-10-13 04:43:25,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:25,037 INFO L225 Difference]: With dead ends: 220 [2020-10-13 04:43:25,037 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 04:43:25,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:43:25,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 04:43:25,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-13 04:43:25,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 04:43:25,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 158 transitions. [2020-10-13 04:43:25,044 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 158 transitions. Word has length 76 [2020-10-13 04:43:25,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:25,045 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 158 transitions. [2020-10-13 04:43:25,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:43:25,045 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 158 transitions. [2020-10-13 04:43:25,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 04:43:25,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:25,048 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:25,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:43:25,048 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:25,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:25,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1721834463, now seen corresponding path program 24 times [2020-10-13 04:43:25,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:25,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568494182] [2020-10-13 04:43:25,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:25,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:25,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:28,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:30,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:30,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 04:43:30,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:30,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:43:30,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:30,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:43:30,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:30,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:43:30,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:30,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:30,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:30,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:30,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:30,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:30,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:30,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:30,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:30,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:30,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:30,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-13 04:43:30,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568494182] [2020-10-13 04:43:30,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:30,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:43:30,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640694273] [2020-10-13 04:43:30,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:43:30,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:30,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:43:30,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:43:30,251 INFO L87 Difference]: Start difference. First operand 128 states and 158 transitions. Second operand 19 states. [2020-10-13 04:43:30,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:30,415 INFO L93 Difference]: Finished difference Result 222 states and 282 transitions. [2020-10-13 04:43:30,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:43:30,416 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 78 [2020-10-13 04:43:30,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:30,417 INFO L225 Difference]: With dead ends: 222 [2020-10-13 04:43:30,417 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 04:43:30,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:43:30,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 04:43:30,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-10-13 04:43:30,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 04:43:30,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 160 transitions. [2020-10-13 04:43:30,425 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 160 transitions. Word has length 78 [2020-10-13 04:43:30,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:30,425 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 160 transitions. [2020-10-13 04:43:30,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:43:30,426 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 160 transitions. [2020-10-13 04:43:30,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 04:43:30,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:30,427 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:30,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:43:30,427 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:30,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:30,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1153434243, now seen corresponding path program 25 times [2020-10-13 04:43:30,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:30,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055956317] [2020-10-13 04:43:30,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:30,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:30,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:34,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:35,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:35,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 04:43:35,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:35,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 04:43:35,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:35,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:43:35,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 04:43:35,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 04:43:35,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:35,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:35,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:35,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:35,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:35,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:35,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:35,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:35,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:35,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:35,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:35,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-13 04:43:35,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055956317] [2020-10-13 04:43:35,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:35,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:43:35,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962399239] [2020-10-13 04:43:35,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:43:35,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:35,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:43:35,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:43:35,583 INFO L87 Difference]: Start difference. First operand 130 states and 160 transitions. Second operand 15 states. [2020-10-13 04:43:35,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:35,932 INFO L93 Difference]: Finished difference Result 196 states and 254 transitions. [2020-10-13 04:43:35,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:43:35,932 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 80 [2020-10-13 04:43:35,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:35,934 INFO L225 Difference]: With dead ends: 196 [2020-10-13 04:43:35,935 INFO L226 Difference]: Without dead ends: 161 [2020-10-13 04:43:35,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:43:35,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-13 04:43:35,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 136. [2020-10-13 04:43:35,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 04:43:35,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 168 transitions. [2020-10-13 04:43:35,943 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 168 transitions. Word has length 80 [2020-10-13 04:43:35,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:35,943 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 168 transitions. [2020-10-13 04:43:35,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:43:35,943 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 168 transitions. [2020-10-13 04:43:35,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 04:43:35,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:35,945 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:35,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:43:35,945 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:35,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:35,945 INFO L82 PathProgramCache]: Analyzing trace with hash -997799336, now seen corresponding path program 26 times [2020-10-13 04:43:35,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:35,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515030253] [2020-10-13 04:43:35,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:35,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:35,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:40,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:40,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 04:43:40,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:40,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:43:40,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:40,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:43:40,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:40,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:43:40,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:41,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:41,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:41,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:41,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:41,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:41,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:41,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:41,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:41,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:41,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:41,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-13 04:43:41,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515030253] [2020-10-13 04:43:41,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:41,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:43:41,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078522445] [2020-10-13 04:43:41,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:43:41,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:41,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:43:41,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:43:41,176 INFO L87 Difference]: Start difference. First operand 136 states and 168 transitions. Second operand 20 states. [2020-10-13 04:43:41,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:41,311 INFO L93 Difference]: Finished difference Result 236 states and 300 transitions. [2020-10-13 04:43:41,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:43:41,311 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 83 [2020-10-13 04:43:41,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:41,312 INFO L225 Difference]: With dead ends: 236 [2020-10-13 04:43:41,312 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 04:43:41,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:43:41,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 04:43:41,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-10-13 04:43:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 04:43:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 170 transitions. [2020-10-13 04:43:41,321 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 170 transitions. Word has length 83 [2020-10-13 04:43:41,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:41,321 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 170 transitions. [2020-10-13 04:43:41,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:43:41,321 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 170 transitions. [2020-10-13 04:43:41,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 04:43:41,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:41,322 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:41,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:43:41,323 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:41,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:41,323 INFO L82 PathProgramCache]: Analyzing trace with hash -429696714, now seen corresponding path program 27 times [2020-10-13 04:43:41,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:41,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287439547] [2020-10-13 04:43:41,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:41,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:41,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:46,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:46,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 04:43:46,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:46,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 04:43:46,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:46,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:43:46,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:46,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:43:46,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:43:46,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:46,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:46,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:46,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:46,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:46,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 04:43:46,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:46,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:46,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:46,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:46,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:43:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-13 04:43:46,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287439547] [2020-10-13 04:43:46,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:46,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:43:46,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769985234] [2020-10-13 04:43:46,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:43:46,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:46,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:43:46,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:43:46,663 INFO L87 Difference]: Start difference. First operand 138 states and 170 transitions. Second operand 21 states. [2020-10-13 04:43:46,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:46,790 INFO L93 Difference]: Finished difference Result 238 states and 302 transitions. [2020-10-13 04:43:46,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:43:46,791 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 85 [2020-10-13 04:43:46,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:46,792 INFO L225 Difference]: With dead ends: 238 [2020-10-13 04:43:46,792 INFO L226 Difference]: Without dead ends: 141 [2020-10-13 04:43:46,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:43:46,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-13 04:43:46,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-10-13 04:43:46,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 04:43:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 172 transitions. [2020-10-13 04:43:46,806 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 172 transitions. Word has length 85 [2020-10-13 04:43:46,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:46,807 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 172 transitions. [2020-10-13 04:43:46,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:43:46,807 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 172 transitions. [2020-10-13 04:43:46,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 04:43:46,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:46,809 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:46,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:43:46,809 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:46,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:46,810 INFO L82 PathProgramCache]: Analyzing trace with hash 56076436, now seen corresponding path program 28 times [2020-10-13 04:43:46,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:46,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251527228] [2020-10-13 04:43:46,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:46,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:46,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:49,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:51,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:51,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 04:43:51,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:51,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 04:43:51,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:51,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:43:51,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 04:43:51,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:43:51,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:51,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:51,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:51,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:51,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:51,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:51,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:51,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:51,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:51,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:51,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:51,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:51,998 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-13 04:43:51,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251527228] [2020-10-13 04:43:51,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:51,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:43:51,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148304437] [2020-10-13 04:43:51,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:43:51,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:51,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:43:52,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:43:52,000 INFO L87 Difference]: Start difference. First operand 140 states and 172 transitions. Second operand 16 states. [2020-10-13 04:43:52,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:52,316 INFO L93 Difference]: Finished difference Result 206 states and 266 transitions. [2020-10-13 04:43:52,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:43:52,317 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-10-13 04:43:52,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:52,319 INFO L225 Difference]: With dead ends: 206 [2020-10-13 04:43:52,319 INFO L226 Difference]: Without dead ends: 171 [2020-10-13 04:43:52,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:43:52,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-13 04:43:52,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 146. [2020-10-13 04:43:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-13 04:43:52,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 180 transitions. [2020-10-13 04:43:52,327 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 180 transitions. Word has length 87 [2020-10-13 04:43:52,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:52,327 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 180 transitions. [2020-10-13 04:43:52,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:43:52,328 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 180 transitions. [2020-10-13 04:43:52,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 04:43:52,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:52,329 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:52,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:43:52,329 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:52,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:52,329 INFO L82 PathProgramCache]: Analyzing trace with hash 906829479, now seen corresponding path program 29 times [2020-10-13 04:43:52,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:52,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44244936] [2020-10-13 04:43:52,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:52,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:52,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:57,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:57,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 04:43:57,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:57,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 04:43:57,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:57,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:43:57,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:57,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:43:57,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:57,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:57,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:57,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:57,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:57,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:57,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:57,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:57,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:57,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:57,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:57,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 04:43:57,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44244936] [2020-10-13 04:43:57,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:57,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:43:57,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287768554] [2020-10-13 04:43:57,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:43:57,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:57,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:43:57,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:43:57,610 INFO L87 Difference]: Start difference. First operand 146 states and 180 transitions. Second operand 22 states. [2020-10-13 04:43:57,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:57,820 INFO L93 Difference]: Finished difference Result 252 states and 320 transitions. [2020-10-13 04:43:57,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:43:57,821 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 90 [2020-10-13 04:43:57,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:57,822 INFO L225 Difference]: With dead ends: 252 [2020-10-13 04:43:57,823 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 04:43:57,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:43:57,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 04:43:57,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2020-10-13 04:43:57,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 04:43:57,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 182 transitions. [2020-10-13 04:43:57,831 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 182 transitions. Word has length 90 [2020-10-13 04:43:57,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:57,831 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 182 transitions. [2020-10-13 04:43:57,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:43:57,831 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 182 transitions. [2020-10-13 04:43:57,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 04:43:57,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:57,832 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:57,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:43:57,833 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:57,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:57,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2133214711, now seen corresponding path program 30 times [2020-10-13 04:43:57,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:57,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646857886] [2020-10-13 04:43:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:57,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:57,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:02,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:02,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 04:44:02,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:02,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:44:02,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:02,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:44:02,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 04:44:02,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 04:44:02,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:03,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:03,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:03,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:03,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:03,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:03,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:03,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:03,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:03,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:03,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:03,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-13 04:44:03,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646857886] [2020-10-13 04:44:03,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:03,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:44:03,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444213374] [2020-10-13 04:44:03,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:44:03,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:03,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:44:03,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:44:03,016 INFO L87 Difference]: Start difference. First operand 148 states and 182 transitions. Second operand 17 states. [2020-10-13 04:44:03,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:03,456 INFO L93 Difference]: Finished difference Result 214 states and 276 transitions. [2020-10-13 04:44:03,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:44:03,457 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-10-13 04:44:03,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:03,458 INFO L225 Difference]: With dead ends: 214 [2020-10-13 04:44:03,458 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 04:44:03,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:44:03,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 04:44:03,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 154. [2020-10-13 04:44:03,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-13 04:44:03,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 190 transitions. [2020-10-13 04:44:03,467 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 190 transitions. Word has length 92 [2020-10-13 04:44:03,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:03,468 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 190 transitions. [2020-10-13 04:44:03,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:44:03,468 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 190 transitions. [2020-10-13 04:44:03,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 04:44:03,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:03,469 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:03,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:44:03,470 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:03,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:03,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1187341038, now seen corresponding path program 31 times [2020-10-13 04:44:03,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:03,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962550504] [2020-10-13 04:44:03,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:03,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:03,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:08,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:08,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 04:44:08,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:08,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:44:08,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:08,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:44:08,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:08,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:44:08,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:08,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:08,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:08,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:08,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:08,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:08,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:08,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:08,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:08,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:08,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:08,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:08,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-13 04:44:08,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962550504] [2020-10-13 04:44:08,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:08,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:44:08,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172350089] [2020-10-13 04:44:08,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:44:08,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:08,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:44:08,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:44:08,790 INFO L87 Difference]: Start difference. First operand 154 states and 190 transitions. Second operand 23 states. [2020-10-13 04:44:09,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:09,005 INFO L93 Difference]: Finished difference Result 266 states and 338 transitions. [2020-10-13 04:44:09,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:44:09,006 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 95 [2020-10-13 04:44:09,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:09,008 INFO L225 Difference]: With dead ends: 266 [2020-10-13 04:44:09,008 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 04:44:09,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:44:09,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 04:44:09,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-10-13 04:44:09,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-13 04:44:09,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 192 transitions. [2020-10-13 04:44:09,021 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 192 transitions. Word has length 95 [2020-10-13 04:44:09,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:09,022 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 192 transitions. [2020-10-13 04:44:09,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:44:09,022 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 192 transitions. [2020-10-13 04:44:09,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 04:44:09,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:09,025 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:09,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:44:09,025 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:09,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:09,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1951518448, now seen corresponding path program 32 times [2020-10-13 04:44:09,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:09,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626207042] [2020-10-13 04:44:09,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:09,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:09,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:14,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:14,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 04:44:14,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:14,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 04:44:14,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:14,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:44:14,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:14,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:44:14,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:14,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:14,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:14,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:14,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:14,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:14,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:14,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:14,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:14,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:14,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:14,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:14,369 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-13 04:44:14,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626207042] [2020-10-13 04:44:14,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:14,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:44:14,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390771672] [2020-10-13 04:44:14,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:44:14,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:14,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:44:14,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:44:14,371 INFO L87 Difference]: Start difference. First operand 156 states and 192 transitions. Second operand 24 states. [2020-10-13 04:44:14,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:14,583 INFO L93 Difference]: Finished difference Result 268 states and 340 transitions. [2020-10-13 04:44:14,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:44:14,584 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 97 [2020-10-13 04:44:14,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:14,585 INFO L225 Difference]: With dead ends: 268 [2020-10-13 04:44:14,585 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 04:44:14,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:44:14,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 04:44:14,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2020-10-13 04:44:14,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-13 04:44:14,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 194 transitions. [2020-10-13 04:44:14,594 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 194 transitions. Word has length 97 [2020-10-13 04:44:14,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:14,595 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 194 transitions. [2020-10-13 04:44:14,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:44:14,595 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 194 transitions. [2020-10-13 04:44:14,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 04:44:14,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:14,596 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:14,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:44:14,597 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:14,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:14,597 INFO L82 PathProgramCache]: Analyzing trace with hash -966524594, now seen corresponding path program 33 times [2020-10-13 04:44:14,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:14,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737332204] [2020-10-13 04:44:14,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:14,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:14,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:19,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:19,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 04:44:19,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:19,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 04:44:19,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:19,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:44:19,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 04:44:19,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:44:19,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:19,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:19,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:19,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:19,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:19,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:19,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:19,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:19,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:19,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:19,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:19,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-13 04:44:19,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737332204] [2020-10-13 04:44:19,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:19,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:44:19,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054001869] [2020-10-13 04:44:19,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:44:19,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:19,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:44:19,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:44:19,827 INFO L87 Difference]: Start difference. First operand 158 states and 194 transitions. Second operand 18 states. [2020-10-13 04:44:20,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:20,260 INFO L93 Difference]: Finished difference Result 224 states and 288 transitions. [2020-10-13 04:44:20,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:44:20,261 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 99 [2020-10-13 04:44:20,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:20,263 INFO L225 Difference]: With dead ends: 224 [2020-10-13 04:44:20,263 INFO L226 Difference]: Without dead ends: 189 [2020-10-13 04:44:20,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:44:20,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-13 04:44:20,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 164. [2020-10-13 04:44:20,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-13 04:44:20,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 202 transitions. [2020-10-13 04:44:20,275 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 202 transitions. Word has length 99 [2020-10-13 04:44:20,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:20,276 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 202 transitions. [2020-10-13 04:44:20,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:44:20,276 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 202 transitions. [2020-10-13 04:44:20,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 04:44:20,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:20,278 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:20,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:44:20,278 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:20,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:20,279 INFO L82 PathProgramCache]: Analyzing trace with hash 802575277, now seen corresponding path program 34 times [2020-10-13 04:44:20,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:20,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864592619] [2020-10-13 04:44:20,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:20,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:20,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:21,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:25,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:25,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 04:44:25,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:44:25,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 04:44:25,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:25,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:44:25,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:25,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:44:25,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:25,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:25,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:25,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:25,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:25,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:25,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:25,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:25,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:25,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:25,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:25,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-13 04:44:25,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864592619] [2020-10-13 04:44:25,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:25,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:44:25,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106095776] [2020-10-13 04:44:25,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:44:25,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:25,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:44:25,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:44:25,665 INFO L87 Difference]: Start difference. First operand 164 states and 202 transitions. Second operand 25 states. [2020-10-13 04:44:25,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:25,850 INFO L93 Difference]: Finished difference Result 282 states and 358 transitions. [2020-10-13 04:44:25,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:44:25,850 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 102 [2020-10-13 04:44:25,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:25,852 INFO L225 Difference]: With dead ends: 282 [2020-10-13 04:44:25,852 INFO L226 Difference]: Without dead ends: 167 [2020-10-13 04:44:25,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:44:25,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-13 04:44:25,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2020-10-13 04:44:25,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-13 04:44:25,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 204 transitions. [2020-10-13 04:44:25,862 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 204 transitions. Word has length 102 [2020-10-13 04:44:25,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:25,863 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 204 transitions. [2020-10-13 04:44:25,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:44:25,863 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 204 transitions. [2020-10-13 04:44:25,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 04:44:25,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:25,865 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:25,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:44:25,865 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:25,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:25,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1270541327, now seen corresponding path program 35 times [2020-10-13 04:44:25,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:25,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160022053] [2020-10-13 04:44:25,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:25,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:26,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:26,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:30,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:30,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 04:44:30,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:44:30,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 04:44:30,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:30,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:44:30,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 04:44:30,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 04:44:30,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:31,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:31,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:31,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:31,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:31,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:31,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:31,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:31,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:31,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:31,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:31,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:31,104 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-13 04:44:31,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160022053] [2020-10-13 04:44:31,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:31,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:44:31,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190748057] [2020-10-13 04:44:31,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:44:31,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:31,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:44:31,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:44:31,106 INFO L87 Difference]: Start difference. First operand 166 states and 204 transitions. Second operand 19 states. [2020-10-13 04:44:31,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:31,586 INFO L93 Difference]: Finished difference Result 232 states and 298 transitions. [2020-10-13 04:44:31,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:44:31,587 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2020-10-13 04:44:31,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:31,589 INFO L225 Difference]: With dead ends: 232 [2020-10-13 04:44:31,589 INFO L226 Difference]: Without dead ends: 197 [2020-10-13 04:44:31,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:44:31,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-13 04:44:31,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 172. [2020-10-13 04:44:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-13 04:44:31,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 212 transitions. [2020-10-13 04:44:31,599 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 212 transitions. Word has length 104 [2020-10-13 04:44:31,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:31,599 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 212 transitions. [2020-10-13 04:44:31,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:44:31,599 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 212 transitions. [2020-10-13 04:44:31,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 04:44:31,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:31,600 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:31,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:44:31,601 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:31,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:31,601 INFO L82 PathProgramCache]: Analyzing trace with hash 225895756, now seen corresponding path program 36 times [2020-10-13 04:44:31,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:31,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822508395] [2020-10-13 04:44:31,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:31,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:32,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:33,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:36,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:36,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 04:44:36,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:44:36,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 04:44:36,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:36,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:44:36,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:36,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:44:36,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:36,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:36,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:36,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:36,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:36,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:36,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:36,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:36,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:36,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:36,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:36,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-13 04:44:36,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822508395] [2020-10-13 04:44:36,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:36,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:44:36,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528430828] [2020-10-13 04:44:36,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:44:36,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:36,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:44:36,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:44:36,975 INFO L87 Difference]: Start difference. First operand 172 states and 212 transitions. Second operand 26 states. [2020-10-13 04:44:37,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:37,233 INFO L93 Difference]: Finished difference Result 296 states and 376 transitions. [2020-10-13 04:44:37,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:44:37,233 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 107 [2020-10-13 04:44:37,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:37,234 INFO L225 Difference]: With dead ends: 296 [2020-10-13 04:44:37,235 INFO L226 Difference]: Without dead ends: 175 [2020-10-13 04:44:37,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:44:37,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-13 04:44:37,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2020-10-13 04:44:37,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-13 04:44:37,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 214 transitions. [2020-10-13 04:44:37,243 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 214 transitions. Word has length 107 [2020-10-13 04:44:37,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:37,243 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 214 transitions. [2020-10-13 04:44:37,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:44:37,244 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 214 transitions. [2020-10-13 04:44:37,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 04:44:37,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:37,245 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:37,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:44:37,245 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:37,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:37,245 INFO L82 PathProgramCache]: Analyzing trace with hash -940819926, now seen corresponding path program 37 times [2020-10-13 04:44:37,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:37,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095071372] [2020-10-13 04:44:37,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:37,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:38,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:38,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:42,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:42,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 04:44:42,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:44:42,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 04:44:42,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:42,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:44:42,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:42,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:44:42,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:42,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:42,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:42,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:42,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:42,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:42,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:42,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:42,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:42,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:42,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:42,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:42,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-13 04:44:42,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095071372] [2020-10-13 04:44:42,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:42,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:44:42,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812574818] [2020-10-13 04:44:42,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:44:42,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:42,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:44:42,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:44:42,663 INFO L87 Difference]: Start difference. First operand 174 states and 214 transitions. Second operand 27 states. [2020-10-13 04:44:42,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:42,869 INFO L93 Difference]: Finished difference Result 298 states and 378 transitions. [2020-10-13 04:44:42,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:44:42,869 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 109 [2020-10-13 04:44:42,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:42,871 INFO L225 Difference]: With dead ends: 298 [2020-10-13 04:44:42,871 INFO L226 Difference]: Without dead ends: 177 [2020-10-13 04:44:42,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:44:42,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-13 04:44:42,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2020-10-13 04:44:42,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-13 04:44:42,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 216 transitions. [2020-10-13 04:44:42,882 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 216 transitions. Word has length 109 [2020-10-13 04:44:42,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:42,882 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 216 transitions. [2020-10-13 04:44:42,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:44:42,882 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 216 transitions. [2020-10-13 04:44:42,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 04:44:42,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:42,883 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:42,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:44:42,884 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:42,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:42,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1168126072, now seen corresponding path program 38 times [2020-10-13 04:44:42,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:42,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4076658] [2020-10-13 04:44:42,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:42,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:45,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:45,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:47,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:47,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 04:44:47,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:44:47,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:44:47,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:47,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:44:47,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 04:44:47,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:44:47,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:48,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:48,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:48,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:48,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:48,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:48,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:44:48,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:48,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:48,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:48,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:48,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:48,118 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-13 04:44:48,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4076658] [2020-10-13 04:44:48,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:48,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:44:48,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579303209] [2020-10-13 04:44:48,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:44:48,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:48,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:44:48,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:44:48,120 INFO L87 Difference]: Start difference. First operand 176 states and 216 transitions. Second operand 20 states. [2020-10-13 04:44:48,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:48,626 INFO L93 Difference]: Finished difference Result 242 states and 310 transitions. [2020-10-13 04:44:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:44:48,626 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 111 [2020-10-13 04:44:48,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:48,628 INFO L225 Difference]: With dead ends: 242 [2020-10-13 04:44:48,628 INFO L226 Difference]: Without dead ends: 207 [2020-10-13 04:44:48,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:44:48,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-13 04:44:48,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 182. [2020-10-13 04:44:48,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-13 04:44:48,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 224 transitions. [2020-10-13 04:44:48,638 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 224 transitions. Word has length 111 [2020-10-13 04:44:48,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:48,639 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 224 transitions. [2020-10-13 04:44:48,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:44:48,639 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 224 transitions. [2020-10-13 04:44:48,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 04:44:48,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:48,640 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:48,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 04:44:48,640 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:48,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:48,641 INFO L82 PathProgramCache]: Analyzing trace with hash -742776013, now seen corresponding path program 39 times [2020-10-13 04:44:48,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:48,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849530947] [2020-10-13 04:44:48,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:48,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:49,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:49,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:53,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:53,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 04:44:53,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:44:53,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 04:44:53,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:53,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:44:53,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:53,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 04:44:53,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:54,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:54,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:54,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:54,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:54,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:54,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:44:54,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:54,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:54,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:54,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:54,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-13 04:44:54,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849530947] [2020-10-13 04:44:54,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:54,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:44:54,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732423811] [2020-10-13 04:44:54,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:44:54,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:54,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:44:54,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:44:54,116 INFO L87 Difference]: Start difference. First operand 182 states and 224 transitions. Second operand 28 states. [2020-10-13 04:44:54,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:54,342 INFO L93 Difference]: Finished difference Result 312 states and 396 transitions. [2020-10-13 04:44:54,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:44:54,343 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 114 [2020-10-13 04:44:54,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:54,345 INFO L225 Difference]: With dead ends: 312 [2020-10-13 04:44:54,345 INFO L226 Difference]: Without dead ends: 185 [2020-10-13 04:44:54,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:44:54,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-13 04:44:54,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2020-10-13 04:44:54,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 04:44:54,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 226 transitions. [2020-10-13 04:44:54,357 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 226 transitions. Word has length 114 [2020-10-13 04:44:54,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:54,358 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 226 transitions. [2020-10-13 04:44:54,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:44:54,358 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 226 transitions. [2020-10-13 04:44:54,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 04:44:54,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:54,359 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:54,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 04:44:54,360 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:54,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:54,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1403205781, now seen corresponding path program 40 times [2020-10-13 04:44:54,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:54,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768731149] [2020-10-13 04:44:54,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:54,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:55,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:57,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:59,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:59,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 04:44:59,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:44:59,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 04:44:59,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:59,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:44:59,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-13 04:44:59,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 04:44:59,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:59,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:59,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:59,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:59,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:59,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:59,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:44:59,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:59,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:59,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:59,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:59,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:44:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-13 04:44:59,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768731149] [2020-10-13 04:44:59,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:59,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:44:59,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362263415] [2020-10-13 04:44:59,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:44:59,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:59,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:44:59,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:44:59,714 INFO L87 Difference]: Start difference. First operand 184 states and 226 transitions. Second operand 21 states. [2020-10-13 04:45:00,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:00,166 INFO L93 Difference]: Finished difference Result 250 states and 320 transitions. [2020-10-13 04:45:00,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:45:00,166 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 116 [2020-10-13 04:45:00,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:00,168 INFO L225 Difference]: With dead ends: 250 [2020-10-13 04:45:00,169 INFO L226 Difference]: Without dead ends: 215 [2020-10-13 04:45:00,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:45:00,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-13 04:45:00,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 190. [2020-10-13 04:45:00,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-13 04:45:00,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 234 transitions. [2020-10-13 04:45:00,178 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 234 transitions. Word has length 116 [2020-10-13 04:45:00,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:00,179 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 234 transitions. [2020-10-13 04:45:00,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:45:00,179 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 234 transitions. [2020-10-13 04:45:00,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 04:45:00,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:00,180 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:00,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 04:45:00,180 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:00,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:00,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1062732550, now seen corresponding path program 41 times [2020-10-13 04:45:00,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:00,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046250151] [2020-10-13 04:45:00,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:00,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:01,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:01,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:05,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:05,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 04:45:05,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:45:05,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 04:45:05,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:05,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:45:05,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:05,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 04:45:05,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:05,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:05,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:05,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:05,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:05,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:05,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:05,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:05,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:05,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:05,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:05,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-13 04:45:05,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046250151] [2020-10-13 04:45:05,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:05,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:45:05,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721901339] [2020-10-13 04:45:05,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:45:05,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:05,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:45:05,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:45:05,652 INFO L87 Difference]: Start difference. First operand 190 states and 234 transitions. Second operand 29 states. [2020-10-13 04:45:05,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:05,841 INFO L93 Difference]: Finished difference Result 326 states and 414 transitions. [2020-10-13 04:45:05,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:45:05,841 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 119 [2020-10-13 04:45:05,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:05,843 INFO L225 Difference]: With dead ends: 326 [2020-10-13 04:45:05,843 INFO L226 Difference]: Without dead ends: 193 [2020-10-13 04:45:05,844 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 04:45:05,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-13 04:45:05,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2020-10-13 04:45:05,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-13 04:45:05,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 236 transitions. [2020-10-13 04:45:05,853 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 236 transitions. Word has length 119 [2020-10-13 04:45:05,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:05,853 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 236 transitions. [2020-10-13 04:45:05,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:45:05,853 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 236 transitions. [2020-10-13 04:45:05,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 04:45:05,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:05,854 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:05,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 04:45:05,854 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:05,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:05,855 INFO L82 PathProgramCache]: Analyzing trace with hash -972096796, now seen corresponding path program 42 times [2020-10-13 04:45:05,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:05,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762752710] [2020-10-13 04:45:05,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:05,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:05,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:05,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:10,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:10,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 04:45:10,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:10,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-13 04:45:10,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:10,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:45:10,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 04:45:10,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 04:45:10,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:11,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:11,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:11,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:11,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:11,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:11,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:11,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:11,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:11,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:11,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:11,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-13 04:45:11,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762752710] [2020-10-13 04:45:11,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:11,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:45:11,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161695837] [2020-10-13 04:45:11,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:45:11,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:11,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:45:11,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:45:11,166 INFO L87 Difference]: Start difference. First operand 192 states and 236 transitions. Second operand 22 states. [2020-10-13 04:45:11,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:11,763 INFO L93 Difference]: Finished difference Result 258 states and 330 transitions. [2020-10-13 04:45:11,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:45:11,763 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 121 [2020-10-13 04:45:11,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:11,766 INFO L225 Difference]: With dead ends: 258 [2020-10-13 04:45:11,766 INFO L226 Difference]: Without dead ends: 223 [2020-10-13 04:45:11,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:45:11,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-13 04:45:11,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 198. [2020-10-13 04:45:11,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-13 04:45:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 244 transitions. [2020-10-13 04:45:11,776 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 244 transitions. Word has length 121 [2020-10-13 04:45:11,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:11,777 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 244 transitions. [2020-10-13 04:45:11,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:45:11,777 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 244 transitions. [2020-10-13 04:45:11,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-13 04:45:11,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:11,778 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:11,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 04:45:11,778 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:11,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:11,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1990137257, now seen corresponding path program 43 times [2020-10-13 04:45:11,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:11,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457121429] [2020-10-13 04:45:11,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:11,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:13,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:13,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:16,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:16,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 04:45:16,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:45:16,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 04:45:16,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:16,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:45:16,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:16,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 04:45:16,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:17,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:17,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:17,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:17,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:17,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:17,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:17,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:17,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:17,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:17,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:17,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-13 04:45:17,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457121429] [2020-10-13 04:45:17,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:17,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:45:17,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660114054] [2020-10-13 04:45:17,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:45:17,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:17,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:45:17,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:45:17,287 INFO L87 Difference]: Start difference. First operand 198 states and 244 transitions. Second operand 30 states. [2020-10-13 04:45:17,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:17,546 INFO L93 Difference]: Finished difference Result 340 states and 432 transitions. [2020-10-13 04:45:17,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:45:17,547 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 124 [2020-10-13 04:45:17,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:17,549 INFO L225 Difference]: With dead ends: 340 [2020-10-13 04:45:17,549 INFO L226 Difference]: Without dead ends: 201 [2020-10-13 04:45:17,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:45:17,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-13 04:45:17,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2020-10-13 04:45:17,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-13 04:45:17,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 246 transitions. [2020-10-13 04:45:17,557 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 246 transitions. Word has length 124 [2020-10-13 04:45:17,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:17,558 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 246 transitions. [2020-10-13 04:45:17,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:45:17,558 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 246 transitions. [2020-10-13 04:45:17,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 04:45:17,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:17,559 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:17,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 04:45:17,559 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:17,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:17,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1136644807, now seen corresponding path program 44 times [2020-10-13 04:45:17,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:17,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222092105] [2020-10-13 04:45:17,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:17,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:19,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:21,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:22,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:22,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 04:45:22,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:45:22,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 04:45:22,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:22,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:45:22,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:22,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 04:45:22,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:23,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:23,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:23,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:23,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:23,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:23,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:23,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:23,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:23,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:23,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:23,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-13 04:45:23,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222092105] [2020-10-13 04:45:23,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:23,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:45:23,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014940764] [2020-10-13 04:45:23,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:45:23,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:23,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:45:23,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:45:23,092 INFO L87 Difference]: Start difference. First operand 200 states and 246 transitions. Second operand 31 states. [2020-10-13 04:45:23,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:23,367 INFO L93 Difference]: Finished difference Result 342 states and 434 transitions. [2020-10-13 04:45:23,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:45:23,368 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 126 [2020-10-13 04:45:23,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:23,369 INFO L225 Difference]: With dead ends: 342 [2020-10-13 04:45:23,370 INFO L226 Difference]: Without dead ends: 203 [2020-10-13 04:45:23,371 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 04:45:23,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-13 04:45:23,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2020-10-13 04:45:23,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-13 04:45:23,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 248 transitions. [2020-10-13 04:45:23,379 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 248 transitions. Word has length 126 [2020-10-13 04:45:23,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:23,380 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 248 transitions. [2020-10-13 04:45:23,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:45:23,380 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 248 transitions. [2020-10-13 04:45:23,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 04:45:23,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:23,381 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:23,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 04:45:23,382 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:23,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:23,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1269153893, now seen corresponding path program 45 times [2020-10-13 04:45:23,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:23,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782488793] [2020-10-13 04:45:23,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:23,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:25,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:25,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:28,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:28,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 04:45:28,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:45:28,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-13 04:45:28,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:28,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:45:28,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-13 04:45:28,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 04:45:28,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:28,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:28,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:28,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:28,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:28,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:28,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:28,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:28,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:28,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:28,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:28,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-13 04:45:28,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782488793] [2020-10-13 04:45:28,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:28,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:45:28,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738924217] [2020-10-13 04:45:28,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:45:28,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:28,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:45:28,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:45:28,717 INFO L87 Difference]: Start difference. First operand 202 states and 248 transitions. Second operand 23 states. [2020-10-13 04:45:29,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:29,266 INFO L93 Difference]: Finished difference Result 268 states and 342 transitions. [2020-10-13 04:45:29,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:45:29,267 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 128 [2020-10-13 04:45:29,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:29,269 INFO L225 Difference]: With dead ends: 268 [2020-10-13 04:45:29,269 INFO L226 Difference]: Without dead ends: 233 [2020-10-13 04:45:29,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:45:29,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-13 04:45:29,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 208. [2020-10-13 04:45:29,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-13 04:45:29,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 256 transitions. [2020-10-13 04:45:29,281 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 256 transitions. Word has length 128 [2020-10-13 04:45:29,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:29,281 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 256 transitions. [2020-10-13 04:45:29,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:45:29,282 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 256 transitions. [2020-10-13 04:45:29,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 04:45:29,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:29,283 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:29,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 04:45:29,284 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:29,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:29,284 INFO L82 PathProgramCache]: Analyzing trace with hash 309483072, now seen corresponding path program 46 times [2020-10-13 04:45:29,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:29,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443373431] [2020-10-13 04:45:29,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:29,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:31,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:31,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:34,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:34,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 04:45:34,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:45:34,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:45:34,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:34,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:45:34,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:34,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 04:45:34,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:34,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:34,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:34,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:34,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:34,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:34,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:45:34,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:34,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:34,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:34,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:34,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1316 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-13 04:45:34,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443373431] [2020-10-13 04:45:34,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:34,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:45:34,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516608456] [2020-10-13 04:45:34,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:45:34,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:34,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:45:34,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:45:34,844 INFO L87 Difference]: Start difference. First operand 208 states and 256 transitions. Second operand 32 states. [2020-10-13 04:45:35,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:35,103 INFO L93 Difference]: Finished difference Result 356 states and 452 transitions. [2020-10-13 04:45:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:45:35,103 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 131 [2020-10-13 04:45:35,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:35,105 INFO L225 Difference]: With dead ends: 356 [2020-10-13 04:45:35,106 INFO L226 Difference]: Without dead ends: 211 [2020-10-13 04:45:35,107 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 04:45:35,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-13 04:45:35,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2020-10-13 04:45:35,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-13 04:45:35,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 258 transitions. [2020-10-13 04:45:35,114 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 258 transitions. Word has length 131 [2020-10-13 04:45:35,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:35,114 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 258 transitions. [2020-10-13 04:45:35,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:45:35,115 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 258 transitions. [2020-10-13 04:45:35,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-13 04:45:35,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:35,116 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:35,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 04:45:35,116 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:35,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:35,116 INFO L82 PathProgramCache]: Analyzing trace with hash 2030989598, now seen corresponding path program 47 times [2020-10-13 04:45:35,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:35,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627410119] [2020-10-13 04:45:35,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:35,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:37,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:37,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:40,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:40,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-13 04:45:40,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:45:40,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-13 04:45:40,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:40,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:45:40,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 04:45:40,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 04:45:40,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:40,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:40,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:40,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:40,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:40,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:40,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:40,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:40,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:40,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:40,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:40,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-13 04:45:40,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627410119] [2020-10-13 04:45:40,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:40,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:45:40,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960026654] [2020-10-13 04:45:40,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:45:40,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:40,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:45:40,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:45:40,480 INFO L87 Difference]: Start difference. First operand 210 states and 258 transitions. Second operand 24 states. [2020-10-13 04:45:41,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:41,153 INFO L93 Difference]: Finished difference Result 276 states and 352 transitions. [2020-10-13 04:45:41,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:45:41,153 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 133 [2020-10-13 04:45:41,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:41,155 INFO L225 Difference]: With dead ends: 276 [2020-10-13 04:45:41,155 INFO L226 Difference]: Without dead ends: 241 [2020-10-13 04:45:41,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:45:41,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-13 04:45:41,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 216. [2020-10-13 04:45:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-13 04:45:41,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 266 transitions. [2020-10-13 04:45:41,164 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 266 transitions. Word has length 133 [2020-10-13 04:45:41,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:41,164 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 266 transitions. [2020-10-13 04:45:41,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:45:41,165 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 266 transitions. [2020-10-13 04:45:41,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 04:45:41,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:41,166 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:41,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 04:45:41,166 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:41,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:41,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1212149283, now seen corresponding path program 48 times [2020-10-13 04:45:41,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:41,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532720794] [2020-10-13 04:45:41,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:41,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:41,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:46,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:46,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 04:45:46,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:46,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 04:45:46,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:46,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:45:46,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:46,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 04:45:46,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:46,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:46,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:46,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:46,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:46,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:46,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:46,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:46,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:46,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:46,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:46,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-13 04:45:46,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532720794] [2020-10-13 04:45:46,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:46,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:45:46,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859971775] [2020-10-13 04:45:46,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:45:46,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:46,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:45:46,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:45:46,744 INFO L87 Difference]: Start difference. First operand 216 states and 266 transitions. Second operand 33 states. [2020-10-13 04:45:46,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:46,930 INFO L93 Difference]: Finished difference Result 370 states and 470 transitions. [2020-10-13 04:45:46,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 04:45:46,931 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 136 [2020-10-13 04:45:46,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:46,933 INFO L225 Difference]: With dead ends: 370 [2020-10-13 04:45:46,933 INFO L226 Difference]: Without dead ends: 219 [2020-10-13 04:45:46,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:45:46,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-13 04:45:46,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2020-10-13 04:45:46,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-13 04:45:46,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 268 transitions. [2020-10-13 04:45:46,941 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 268 transitions. Word has length 136 [2020-10-13 04:45:46,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:46,941 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 268 transitions. [2020-10-13 04:45:46,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:45:46,941 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 268 transitions. [2020-10-13 04:45:46,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-13 04:45:46,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:46,942 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:46,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 04:45:46,942 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:46,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:46,943 INFO L82 PathProgramCache]: Analyzing trace with hash -344452673, now seen corresponding path program 49 times [2020-10-13 04:45:46,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:46,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80762523] [2020-10-13 04:45:46,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:46,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:49,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:49,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:51,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:51,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-13 04:45:51,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:45:51,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:45:51,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:51,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:45:51,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:51,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 04:45:51,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:52,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:52,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:52,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:52,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:52,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:52,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:52,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:52,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:52,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:52,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:52,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1490 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-13 04:45:52,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80762523] [2020-10-13 04:45:52,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:52,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 04:45:52,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863261345] [2020-10-13 04:45:52,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 04:45:52,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:52,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 04:45:52,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:45:52,529 INFO L87 Difference]: Start difference. First operand 218 states and 268 transitions. Second operand 34 states. [2020-10-13 04:45:52,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:52,792 INFO L93 Difference]: Finished difference Result 372 states and 472 transitions. [2020-10-13 04:45:52,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 04:45:52,793 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 138 [2020-10-13 04:45:52,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:52,794 INFO L225 Difference]: With dead ends: 372 [2020-10-13 04:45:52,795 INFO L226 Difference]: Without dead ends: 221 [2020-10-13 04:45:52,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:45:52,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-13 04:45:52,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2020-10-13 04:45:52,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-13 04:45:52,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 270 transitions. [2020-10-13 04:45:52,804 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 270 transitions. Word has length 138 [2020-10-13 04:45:52,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:52,804 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 270 transitions. [2020-10-13 04:45:52,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 04:45:52,804 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 270 transitions. [2020-10-13 04:45:52,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-13 04:45:52,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:52,805 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:52,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 04:45:52,806 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:52,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:52,806 INFO L82 PathProgramCache]: Analyzing trace with hash 288334113, now seen corresponding path program 50 times [2020-10-13 04:45:52,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:52,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551527545] [2020-10-13 04:45:52,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:52,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:52,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:57,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:57,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-13 04:45:57,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:57,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5081 [2020-10-13 04:45:57,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:57,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:45:57,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:57,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 04:45:57,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:58,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:58,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:58,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:58,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:58,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:58,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:58,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:58,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:58,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:58,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:58,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-13 04:45:58,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551527545] [2020-10-13 04:45:58,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:58,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:45:58,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881498075] [2020-10-13 04:45:58,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:45:58,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:58,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:45:58,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:45:58,530 INFO L87 Difference]: Start difference. First operand 220 states and 270 transitions. Second operand 35 states. [2020-10-13 04:45:58,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:58,826 INFO L93 Difference]: Finished difference Result 374 states and 474 transitions. [2020-10-13 04:45:58,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 04:45:58,827 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 140 [2020-10-13 04:45:58,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:58,829 INFO L225 Difference]: With dead ends: 374 [2020-10-13 04:45:58,829 INFO L226 Difference]: Without dead ends: 223 [2020-10-13 04:45:58,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:45:58,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-13 04:45:58,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2020-10-13 04:45:58,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-13 04:45:58,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 272 transitions. [2020-10-13 04:45:58,838 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 272 transitions. Word has length 140 [2020-10-13 04:45:58,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:58,838 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 272 transitions. [2020-10-13 04:45:58,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:45:58,838 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 272 transitions. [2020-10-13 04:45:58,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-13 04:45:58,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:58,839 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:58,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 04:45:58,839 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:58,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:58,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1488920573, now seen corresponding path program 51 times [2020-10-13 04:45:58,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:58,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109229937] [2020-10-13 04:45:58,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:58,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:01,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:01,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:03,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:03,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-13 04:46:03,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:46:03,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 04:46:03,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:03,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:46:03,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 04:46:03,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 04:46:03,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:04,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:04,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:04,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:04,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:04,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:04,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:04,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:04,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:04,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:04,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:04,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1614 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-13 04:46:04,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109229937] [2020-10-13 04:46:04,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:04,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:46:04,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793501289] [2020-10-13 04:46:04,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:46:04,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:04,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:46:04,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:46:04,206 INFO L87 Difference]: Start difference. First operand 222 states and 272 transitions. Second operand 25 states. [2020-10-13 04:46:04,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:04,865 INFO L93 Difference]: Finished difference Result 288 states and 366 transitions. [2020-10-13 04:46:04,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:46:04,866 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 142 [2020-10-13 04:46:04,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:04,868 INFO L225 Difference]: With dead ends: 288 [2020-10-13 04:46:04,868 INFO L226 Difference]: Without dead ends: 253 [2020-10-13 04:46:04,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:46:04,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-13 04:46:04,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 228. [2020-10-13 04:46:04,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-13 04:46:04,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 280 transitions. [2020-10-13 04:46:04,877 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 280 transitions. Word has length 142 [2020-10-13 04:46:04,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:04,878 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 280 transitions. [2020-10-13 04:46:04,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:46:04,878 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 280 transitions. [2020-10-13 04:46:04,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-13 04:46:04,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:04,879 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:04,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 04:46:04,879 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:04,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:04,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1229521704, now seen corresponding path program 52 times [2020-10-13 04:46:04,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:04,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763865893] [2020-10-13 04:46:04,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:04,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking...